CN104530597B - Biodegradable pearlescent pen shell and preparation method thereof - Google Patents

Abstract

The present invention relates to a degradable pearl pen case and a manufacturing method thereof, which comprises: 1) 35-55 parts of activated sludge powder, 10-25 parts of polymer material, 5-15 parts of fiber powder, and 5-10 parts of activated carbon Powder, 5-15 parts of binder, 3-5 parts of calcium carbonate, 3-5 parts of pearlescent masterbatch, additives: including sodium stearate, coupling agent and compatibilizer, wherein sodium stearate is 2% of the mass of activated carbon powder; the coupling agent is 1% of the mass of activated carbon powder; the compatibilizer is 3%-5% of the total mass; the above materials are added to the mixer and mixed uniformly; 2) the obtained The mixture is plasticized and extruded by a single-screw extruder, granulated and subjected to secondary processing through molding to obtain a biodegradable pearl pen shell. It uses the waste in life—sludge and straw as raw materials, realizes the reuse of waste, avoids the secondary pollution caused by the existing sludge treatment method, and reduces the environmental pollution caused by straw burning; in addition, the obtained pen shell It can be completely degraded and can be used as fertilizer to improve soil after degradation.

Description

A kind of degradable pearl pen shell and its manufacturing method

technical field

The invention relates to a degradable pearlescent pen case produced by using activated sludge powder as the main material and a manufacturing method thereof, in particular to the application of the pen case which is easy to degrade, purifies air, has a pearlescent effect, and an environmental protection material.

Background technique

With the development of society and economy, more and more factory wastewater is discharged, and at the same time, the amount of sludge is increasing day by day, which seriously affects the water environment of our country. According to reports, the amount of silt at the bottom of the Taihu Lake is 67 million cubic meters, and the Pearl River Delta area is 80 million cubic meters, which will affect the water quality and shipping functions of the river. In the past, the method of desilting was to transport the sludge to the pen shell station for natural weathering, which would pollute the air again and waste material and financial resources. In the past, the sludge generated in the sewage project was disposed of by stacking or discarding, which not only caused a lot of waste of land resources, but also caused irreparable damage to the ecological environment, and the heavy metal ions and organic compounds contained in the sludge It will cause secondary pollution to the surrounding soil and air.

Traditional pen casings are not easy to identify at night, and white pollution will become serious after being discarded, and some pens and inks have a strong smell, especially for some people whose vision decreases significantly at night, the problem of not being easy to identify will be more obvious.

Contents of the invention

The present invention aims at the above-mentioned problems and provides a method for producing degradable pearl pen shells using activated sludge with simple process and low cost. On the one hand, the recycling of wastes is used to realize sewage treatment and reduce the pollution of wastes to the environment. On the other hand, The produced pearlescent pen shell can be turned into organic fertilizer after degradation. At the same time, the pearlescent pen shell is conducive to the rapid identification of its position at night, and the odor of ink will be reduced due to the activated carbon.

The technical solution adopted in the present invention is: a preparation method of a degradable pearl pen shell, comprising:

1) Add each component material into the high-speed mixer according to the following proportions by weight, and mix evenly;

Auxiliaries: including sodium stearate, coupling agent and compatibilizer, wherein, sodium stearate is 2% of the mass of activated carbon powder; coupling agent is 1% of the mass of activated carbon powder; compatibilizer is 3% of the total mass %-5%;

2) The mixture obtained in step 1) is plasticized and extruded by a single-screw extruder, granulated and subjected to secondary processing by molding to obtain a biodegradable pearl pen case.

As a preference, the activated sludge powder is obtained by drying after domestication by the following domestication method,

First, according to the ratio of mass ratio BOD ₅ :C:N:P=100:75:5:1, simulated waste water is prepared as a culture solution for later use;

Then, add the activated sludge and the culture solution from the municipal sludge treatment plant into the SBR reaction tank with an effective volume of 15L, stir and aerate, and under aerobic conditions, change the water once every 12 hours, that is, every sludge Aged for 12 hours, including 10.5 hours of agitation and aeration, 1 hour of standing and 0.5 hours of water change;

On the 1st-6th day, change the water 3L each time, and control the DO value to 1.5mg/L;

On the 7th-12th day, change the water 4.5L each time, and control the DO value to 2.0mg/L;

On the 13th-18th day, change the water 6L each time, and control the DO value to 2.5mg/L;

Among them, in the stage of standing still and changing water, the DO value should not be lower than 0.2mg/L;

During the domestication process, keep the pH value of the sludge solution between 6.5-8.0 and the temperature between 24-26°C;

After 18 days, the acclimated activated sludge can be obtained.

Preferably, the polymer material includes PVC, PP, PS.

Preferably, the fiber powder is crop straw powder.

Preferably, the pearlescent masterbatch includes PLA and 123 pearlescent powder.

Preferably, the weight ratio of PLA and 123 pearl powder is (25-35):10.

Preferably, the adhesive is a thermoplastic elastomer, such as TPU (thermoplastic polyurethane elastomer), TPV (thermoplastic vulcanizate) and the like.

Preferably, the coupling agent is a silane coupling agent.

Preferably, the compatibilizer is PE-g-MAH.

A degradable pearl pen case prepared by the method.

The beneficial effects of the present invention are:

1. Using domestic waste—sludge and straw as raw materials, on the one hand, it realizes the reuse of waste, on the other hand, it avoids the secondary pollution caused by the existing sludge treatment method, and reduces the environmental pollution caused by straw burning ; In addition, the obtained pen shell can be completely degraded, and can be used as fertilizer to improve soil after degradation.

2. The sludge from the municipal sludge treatment plant is domesticated and dried into powder as a raw material, which realizes the reuse of waste and solves the problem of sewage treatment; in addition, the sludge is rich in polyhydroxy fatty acid sodium after domestication , this degradable material has excellent performance and is a natural degradable material.

3. The technology of the present invention can increase the ability of the pen case to purify the air around the pen tip by adding activated carbon powder.

4. It has the characteristics of low-carbon environmental protection, simple process, high production efficiency and low cost.

5. The present invention adds calcium carbonate to the product, which can enhance the strength of the pen case and make the pen case not easy to be broken.

6. The present invention can also produce degradable pen casings that are completely degraded within half a year to five years by adjusting the production formula.

7. PLA and 123 pearlescent powder are added, and the cold wind of the pearlescent pen made is conducive to people's quick recognition of the pearlescent pen shell at night.

detailed description

In the present invention, the simulated waste water is used to domesticate, ferment and dry the sludge, some crop straw powder, activated carbon powder, polymer material, calcium carbonate, adhesive, PLA and 123 pearl powder, and pour them into a high-speed mixer to stir evenly. Then plasticize and extrude through a single-screw extruder, granulate, and mold for secondary processing to obtain a biodegradable pen case. Different molds can obtain different products. After ventilation, cooling and drying, the required biodegradable luminous pen can be made. shell products.

The implementation steps of the preparation method of a kind of degradable pearl pen shell of the present invention are further described below:

Example 1:

First, add each component material into the high-speed mixer according to the following proportions by weight, heat and stir, and stir evenly after 2 hours;

Auxiliary agent: comprise sodium stearate, coupling agent and compatibilizer, wherein, sodium stearate is 2% of the quality of activated carbon powder; Coupling agent is 1% of the quality of activated carbon powder; The parts of compatibilizer are total 3% of mass;

Among them, the pearlescent masterbatch is a mixture of biodegradable plastic polylactic acid (PLA) and 123 pearlescent powder, and the weight ratio of the two is 25:10.

Then, the mixture obtained in step 1) is plasticized and extruded by a single-screw extruder, granulated, and molded for secondary processing to obtain a biodegradable pearl pen shell. Different molds can obtain different products, which can be produced after ventilation, cooling and drying. Into the required degradable pearl pen shell products.

The activated sludge powder used should be the sludge powder that has been domesticated by gradient dynamic cultivation and fermented and dried, because it is rich in polyhydroxyalkanoate and can be better mixed with other components. The specific preparation process is:

1) According to the ratio of mass ratio BOD ₅ :C:N:P=100:75:5:1, the simulated waste water is prepared as the culture medium for standby; the carbon in the simulated waste water is provided by sodium acetate, the nitrogen is provided by ammonium chloride, and the phosphorus is provided by Dipotassium hydrogen phosphate provides;

2) Add the activated sludge from the municipal sludge treatment plant and the culture solution obtained in step 1) into a 20L SBR reaction tank (effective volume 15L), stir and aerate, and change the water every 12 hours under aerobic conditions Once, that is, each mud age is 12 hours, including 10.5 hours of agitation and aeration, 1 hour of standing and 0.5 hours of water change;

On the first 1-6 days, change the water 3L each time (discharge 3L of waste water first, then add 3L of the culture solution obtained in step 1), and control the DO value to 1.5mg/L; during the static and water change stages, control the DO value is not low At 0.2mg/L;

On the 7th-12th day, change the water 4.5L each time (discharge 4.5L of waste water first, then add 4.5L of the culture solution obtained in step 1), and control the DO value (dissolved oxygen, the same below) to 2.0mg/L; During the water change stage, the DO value should not be lower than 0.2mg/L;

On the 13th-18th day, change the water 6L each time (discharge 6L of waste water first, then add 6L of the culture solution obtained in step 1), and control the DO value to 2.5mg/L; in the stage of standing and changing water, control the DO value is not low at 0.2mg/L; ensure that the aeration rate and stirring speed are appropriately increased with the increase of water exchange volume during the acclimation period.

During the whole domestication process, adjust the pH value of the sludge liquid by 1mol/L HCL or NaOH to maintain it between 6.5-8.0; the temperature is stabilized between 24-26°C through indoor cabinet air conditioners or heating rods, To ensure the stable growth of microorganisms.

After 18 days of cultivation and acclimatization, the sludge color changed from black to reddish brown, with obvious fishy smell, and the settling performance was significantly improved. The final result was 30 minutes of SV (settling velocity, sludge sedimentation ratio, also known as 30 minutes Settling rate) is 25-30%, the value of SVI (sludge volume index, sludge volume index) is 75-90, and MLVSS (mixed liquorvolatile suspended solids, the concentration of volatile suspended solids in the mixed liquor indicates that the mixed liquor activated sludge The concentration of the organic solid matter part) is stable between 3500-4500 mg/L, and the COD _CR degradation rate of the discharged wastewater is greater than 85%.

The polymer material can be PVC, PP, PS and so on.

The fiber powder is taken from crop straws (such as corn straw, wheat straw, soybean straw, sugarcane straw, rice straw, etc.) that are often burned to produce pollution and waste, and crushed into powder to 20 mesh; Rich in nitrogen, phosphorus, potassium, calcium, magnesium and organic matter, etc., it is a multi-purpose renewable biological resource that can be turned into soil nutrients after degradation.

Activated carbon powder is used to improve the air purification ability of the material. Its addition can absorb harmful gases such as formaldehyde, toluene, sulfur dioxide, carbon dioxide, and ammonia. The invented pen case is degradable, which makes the performance of the pen case more excellent.

The adhesive is a solvent such as thermoplastic elastomer, synthetic rubber, etc. commonly used to connect two separated materials together, such as TPU, TPV, and the like.

The addition of calcium carbonate can enhance the strength of the pen shell and make the pen shell not easy to break.

The auxiliary agent is used as a whole to promote the uniform mixing of materials. Among them, sodium stearate is used as a lubricant here to improve the fusion of the plastic in the molten state and increase the processability; the coupling agent (silane coupling in this example) agent) is used to improve the dispersibility of the plastic, making it easy to mix and increase the adhesiveness; the addition of the compatibilizer (PE-g-MAH in this case) is to prevent the delamination of the pen shell products made Phenomenon, mainly the compatibility between activated carbon powder and binder.

Example 2:

First, add each component material into the high-speed mixer according to the following proportions by weight, heat and stir, and stir evenly after 2 hours;

Auxiliary agent: including sodium stearate, coupling agent and compatibilizer, wherein, sodium stearate is 2% of the quality of activated carbon powder; Coupling agent is 1% of the quality of activated carbon powder; Compatibilizer is 5% of the total mass %.

Among them, the pearlescent masterbatch is a mixture of biodegradable plastic polylactic acid (PLA) and 123 pearlescent powder, and the weight ratio of the two is 30:10.

Then, the mixture obtained in step 1) is plasticized and extruded by a single-screw extruder, granulated, and molded for secondary processing to obtain a biodegradable pearl pen shell. Different molds can obtain different products, which can be produced after ventilation, cooling and drying. Into the required degradable pearl pen shell products.

The activated sludge powder used should be the sludge powder that has been domesticated by gradient dynamic cultivation and fermented and dried, because it is rich in polyhydroxyalkanoate and can be better mixed with other components. The specific preparation process is:

1) According to the ratio of mass ratio BOD ₅ :C:N:P=100:75:5:1, the simulated waste water is prepared as the culture medium for standby; the carbon in the simulated waste water is provided by sodium acetate, the nitrogen is provided by ammonium chloride, and the phosphorus is provided by Dipotassium hydrogen phosphate provides;

2) Add the activated sludge from the municipal sludge treatment plant and the culture solution obtained in step 1) into a 20L SBR reaction tank (effective volume 15L), stir and aerate, and change the water every 12 hours under aerobic conditions Once, that is, each mud age is 12 hours, including 10.5 hours of agitation and aeration, 1 hour of standing and 0.5 hours of water change;

On the 1st to 6th day, change the water 3L each time (discharge 3L of waste water first, then add 3L of the culture solution obtained in step 1), and control the DO value to 1.5mg/L; in the stage of standing and changing water, control the DO value is not low at 0.2mg/L;

On the 7th-12th day, change the water 4.5L each time (discharge 4.5L of waste water first, then add 4.5L of the culture solution obtained in step 1), and control the DO value (dissolved oxygen, the same below) to 2.0mg/L; During the water change stage, the DO value should not be lower than 0.2mg/L;

On the 13th-18th day, change the water 6L each time (discharge 6L of waste water first, then add 6L of the culture solution obtained in step 1), and control the DO value to 2.5mg/L; in the stage of standing and changing water, control the DO value is not low at 0.2mg/L; ensure that the aeration rate and stirring speed are appropriately increased with the increase of water exchange volume during the acclimation period.

During the whole domestication process, adjust the pH value of the sludge liquid by 1mol/L HCL or NaOH to maintain it between 6.5-8.0; the temperature is stabilized between 24-26°C through indoor cabinet air conditioners or heating rods, To ensure the stable growth of microorganisms.

After 18 days of cultivation and acclimatization, the sludge color changed from black to reddish brown, with obvious fishy smell, and the settling performance was significantly improved. The final result was 30 minutes of SV (settling velocity, sludge sedimentation ratio, also known as 30 minutes Settling rate) is 25-30%, the value of SVI (sludge volume index, sludge volume index) is 75-90, and MLVSS (mixed liquorvolatile suspended solids, the concentration of volatile suspended solids in the mixed liquor indicates that the mixed liquor activated sludge The concentration of the organic solid matter part) is stable between 3500-4500 mg/L, and the COD _CR degradation rate of the discharged wastewater is greater than 85%.

The polymer material can be PVC, PP, PS and so on.

The fiber powder is taken from crop straws (such as corn straw, wheat straw, soybean straw, sugarcane straw, rice straw, etc.) Containing nitrogen, phosphorus, potassium, calcium, magnesium and organic matter, etc., it is a multi-purpose renewable biological resource that can be turned into soil nutrients after degradation.

Activated carbon powder is used to improve the air purification ability of the material. Its addition can absorb harmful gases such as formaldehyde, toluene, sulfur dioxide, carbon dioxide, and ammonia. The invented pen case is degradable, which makes the performance of the pen case more excellent.

The adhesive is a solvent such as thermoplastic elastomer, synthetic rubber, etc. commonly used to connect two separated materials together, such as TPU, TPV, and the like.

The addition of calcium carbonate can enhance the strength of the pen shell and make the pen shell not easy to break.

The auxiliary agent is used as a whole to promote the uniform mixing of materials. Among them, sodium stearate is used as a lubricant here to improve the fusion of the plastic in the molten state and increase the processability; the coupling agent (silane coupling in this example) agent) is used to improve the dispersibility of the plastic, making it easy to mix and increase the adhesiveness; the addition of the compatibilizer (PE-g-MAH in this case) is to prevent delamination of the finished pen shell product Phenomenon, mainly the compatibility between activated carbon powder and binder.

Example 3:

First, add each component material into the high-speed mixer according to the following proportions by weight, heat and stir, and stir evenly after 2 hours;

Auxiliary agent: comprise sodium stearate, coupling agent and compatibilizer, wherein, sodium stearate is 2% of the quality of activated carbon powder; Coupling agent is 1% of the quality of activated carbon powder; The parts of compatibilizer are total 4% of mass.

Among them, the pearlescent masterbatch is a mixture of biodegradable plastic polylactic acid (PLA) and 123 pearlescent powder, and the weight ratio of the two is 35:10.

Then, the mixture obtained in step 1) is plasticized and extruded by a single-screw extruder, granulated, and molded for secondary processing to obtain a biodegradable pearl pen shell. Different molds can obtain different products, which can be produced after ventilation, cooling and drying. Into the required degradable pearl pen shell products.

The activated sludge powder used should be the sludge powder that has been domesticated by gradient dynamic cultivation and fermented and dried, because it is rich in polyhydroxyalkanoate and can be better mixed with other components. The specific preparation process is:

1) According to the ratio of mass ratio BOD ₅ :C:N:P=100:75:5:1, the simulated waste water is prepared as the culture medium for standby; the carbon in the simulated waste water is provided by sodium acetate, the nitrogen is provided by ammonium chloride, and the phosphorus is provided by Dipotassium hydrogen phosphate provides;

2) Add the activated sludge from the municipal sludge treatment plant and the culture solution obtained in step 1) into a 20L SBR reaction tank (effective volume 15L), stir and aerate, and change the water every 12 hours under aerobic conditions Once, that is, each mud age is 12 hours, including 10.5 hours of agitation and aeration, 1 hour of standing and 0.5 hours of water change;

On the first 1-6 days, change the water 3L each time (discharge 3L of waste water first, then add 3L of the culture solution obtained in step 1), and control the DO value to 1.5mg/L; during the static and water change stages, control the DO value is not low at 0.2mg/L;

On the 7th-12th day, change the water 4.5L each time (discharge 4.5L of waste water first, then add 4.5L of the culture solution obtained in step 1), and control the DO value (dissolved oxygen, the same below) to 2.0mg/L; During the water change stage, the DO value should not be lower than 0.2mg/L;

On the 13th-18th day, change the water 6L each time (discharge 6L of waste water first, then add 6L of the culture solution obtained in step 1), and control the DO value to 2.5mg/L; in the stage of standing and changing water, control the DO value is not low at 0.2mg/L; and increase the aeration rate and stirring speed appropriately with the increase of water exchange volume.

During the whole domestication process, adjust the pH value of the sludge liquid by 1mol/L HCL or NaOH to maintain it between 6.5-8.0; the temperature is stabilized between 24-26°C through indoor cabinet air conditioners or heating rods, To ensure the stable growth of microorganisms.

After 18 days of cultivation and acclimatization, the sludge color changed from black to reddish brown, with obvious fishy smell, and the settling performance was significantly improved. The final result was 30 minutes of SV (settling velocity, sludge sedimentation ratio, also known as 30 minutes Settling rate) is 25-30%, the value of SVI (sludge volume index, sludge volume index) is 75-90, and MLVSS (mixed liquorvolatile suspended solids, the concentration of volatile suspended solids in the mixed liquor indicates that the mixed liquor activated sludge The concentration of the organic solid matter part) is stable between 3500-4500 mg/L, and the COD _CR degradation rate of the discharged wastewater is greater than 85%.

The polymer material can be PVC, PP, PS and so on.

The fiber powder is taken from crop straws (such as corn straw, wheat straw, soybean straw, sugarcane straw, rice straw, etc.) Containing nitrogen, phosphorus, potassium, calcium, magnesium and organic matter, etc., it is a multi-purpose renewable biological resource that can be turned into soil nutrients after degradation.

Activated carbon powder is used to improve the air purification ability of the material. Its addition can absorb harmful gases such as formaldehyde, toluene, sulfur dioxide, carbon dioxide, and ammonia. The invented pen case is degradable, which makes the performance of the pen case more excellent.

The adhesive is a solvent such as thermoplastic elastomer, synthetic rubber, etc. commonly used to connect two separated materials together, such as TPU, TPV, and the like.

The addition of calcium carbonate can enhance the strength of the pen shell and make the pen shell not easy to break.

The auxiliary agent is used as a whole to promote the uniform mixing of materials. Among them, sodium stearate is used as a lubricant here to improve the fusion of the plastic in the molten state and increase the processability; the coupling agent (silane coupling in this example) agent) is used to improve the dispersibility of the plastic, making it easy to mix and increase the adhesiveness; the addition of the compatibilizer (PE-g-MAH in this case) is to prevent delamination of the finished pen shell product Phenomenon, mainly the compatibility between activated carbon powder and binder.

Claims (9)

1. a kind of manufacture method of degradable pearl shell is it is characterised in that include：

1) each component materials are added in mixer according to the proportioning of following parts by weight, mix homogeneously；

Auxiliary agent：Including sodium stearate, coupling agent and compatilizer, wherein, sodium stearate is the 2% of activated carbon powder quality； Coupling agent is the 1% of activated carbon powder quality；Compatilizer is the 3%-5% of gross mass；

2) by step 1) by single screw extrusion machine plasticizing extrusion, pelletize is simultaneously obtained gained mixture by being molded secondary operations Biodegradable pearly-lustre shell；

Described activated sludge powder is dried to obtain after being tamed using following acclimation method,

First, according to mass ratio BOD₅：C：N：P=100：75：5：1 proportions simulated wastewater as culture fluid, Standby；

Then, the activated sludge and described culture fluid that come from municipal sludge treatment plant are added the sbr reactor of dischargeable capacity 15L Chi Zhong, stirs aeration, under aerobic condition, changes water once within every 12 hours, i.e. each sludge age 12 hours, including 10.5 hours Stirring aeration, the standing of 1 hour and 0.5 hour change water；

The 1-6 days, change water 3L every time, and control DO value for 1.5mg/L；

The 7-12 days, change water 4.5L every time, and control DO value for 2.0mg/L；

The 13-18 days, change water 6L every time, and control DO value for 2.5mg/L；

Wherein, standing and changing the water stage, controlling DO value to be not less than 0.2mg/L；

Keep the pH value of sludge liquid during domestication between 6.5-8.0, temperature is between 24-26 DEG C；

Activated sludge after being tamed after 18 days, drying for standby.

2. according to claim 1 degradable pearl shell manufacture method it is characterised in that：Described macromolecular material includes PVC、PP、PS.

3. according to claim 1 degradable pearl shell manufacture method it is characterised in that：Described fiber dust is farming Thing stalk powder.

4. according to claim 1 degradable pearl shell manufacture method it is characterised in that：Described pearly-lustre Masterbatch bag Include PLA and 123 pearl essences.

5. according to claim 4 degradable pearl shell manufacture method it is characterised in that：Described PLA and 123 pearls The weight ratio of light powder is (25-35):10.

6. according to claim 1 degradable pearl shell manufacture method it is characterised in that：Described adhesive is thermoplasticity Elastomer.

7. according to claim 1 degradable pearl shell manufacture method it is characterised in that：Described coupling agent is that silane is even Connection agent.

8. according to claim 1 degradable pearl shell manufacture method it is characterised in that：Described compatilizer is PE-g-MAH.

9. the degradable pearl shell that a kind of employing claim 1-8 any one methods described makes.