CN107779984B - Nano-material modified PBT spinning - Google Patents

Abstract

The invention provides a nanomaterial-modified PBT spinning, which, in parts by weight, comprises 60-90 parts of polybutylene terephthalate, 25-30 parts of nanomaterials and 10-15 parts of dispersant. The nanomaterial is one or more of nano-zinc oxide, nano-alumina, nano-silicon dioxide, nano-titanium dioxide, nano-silver antibacterial agent, nano-tin antimony oxide; the dispersing agent is sodium tripolyphosphate, hexagonal One or more of sodium phosphate, sodium pyrophosphate, triethylhexyl phosphoric acid, sodium lauryl sulfate, methyl amyl alcohol, propylene glycol, butylene glycol, p-propylene glycol, polyethylene glycol 200 or 400 . The nanomaterial-modified PBT spinning has a rich and diverse structure, plump, dense, and uniform in layers, just like natural growth; the ability of the nanomaterial-modified PBT spinning wool to catch powder is more than ten times higher; and the skin feels more tactile Soft touch, delicate and comfortable; excellent elasticity, viscosity, transparency and other performance indicators, excellent comprehensive performance.

Description

A nanomaterial-modified PBT spinning

technical field

The invention belongs to the technical field of functional synthetic fibers, and in particular relates to PBT spinning modified by nanometer materials. Background technique

As the world's population continues to grow and living standards improve, the demand for textiles and apparel and packaging is increasing. Due to the increasingly fierce competition between grain and cotton, natural fibers have been difficult to meet people's living needs, and synthetic fibers account for an increasing proportion of global fiber consumption. Compared with other synthetic fiber materials, polyester materials have higher versatility and excellent physical and mechanical properties, coupled with relatively low cost of raw materials, mature industrial technology, and increasing single-line production capacity. These factors make polyester. The application of fibers (such as polyester) is becoming more and more extensive, and the demand is also increasing.

With the development of science and technology, nanotechnology can realize the research and processing of substances and materials at the nanometer scale, and realize new materials with specific properties made by regulating the structure of substances in the nanometer scale (1-100 nm). Nanomaterials have the characteristics of small size, large specific surface area, high surface energy, and large surface atomic ratio; they have effects such as small size effect, quantum size effect, macroscopic quantum tunneling effect, and surface effect; which makes people have a greater ability in the field of spinning. progress.

PBT is the abbreviation of polybutylene terephthalate (polybutylene terephthalate fibre), which was once the pride of engineering plastics. In 1979, Teijin Corporation of Japan first introduced PBT fiber products. With the development of differentiated fibers, the use value of PBT as a fiber is gradually recognized by people. PBT fibers have the following characteristics: good durability, dimensional stability and good elasticity, and elasticity is not affected by humidity. PBT fiber and its products are soft to the touch, have good hygroscopicity, abrasion resistance and fiber curling, excellent tensile elasticity and compression elasticity, and its elastic recovery rate is better than that of polyester. PBT fiber has special stretchability under both dry and wet conditions, and the elasticity is not affected by the temperature change of the surrounding environment, and the price is much lower than that of spandex fiber. It has good dyeing performance and can be dyed by ordinary disperse dyes at atmospheric pressure without carrier; the dyed fibers have bright color, excellent color fastness and chlorine resistance. Has excellent chemical resistance, light resistance and heat resistance.

How to effectively use nanotechnology to modify PBT to obtain more specific spinning has important research significance.

SUMMARY OF THE INVENTION

Aiming at the deficiencies of the prior art, the present invention provides a PBT spinning modified by nano-materials that is safe, environmentally friendly, and has rich and diverse structures.

In one aspect, the present invention provides a nanomaterial-modified PBT spinning, which comprises, in parts by weight, 60-90 parts of polybutylene terephthalate, 25-30 parts of nanomaterials and 10-15 parts of a dispersant. The nanomaterial is one or more of nano-zinc oxide, nano-alumina, nano-silicon dioxide, nano-titanium dioxide, nano-silver antibacterial agent, nano-tin antimony oxide; the dispersant is sodium tripolyphosphate , one of sodium hexametaphosphate, sodium pyrophosphate, triethylhexyl phosphoric acid, sodium lauryl sulfate, methyl amyl alcohol, propylene glycol, butylene glycol, p-propylene glycol, polyethylene glycol 200 or 400 or several.

Further, the nanomaterial is a mixture of nano antimony tin oxide, nano titanium dioxide and nano silicon dioxide, and the mass ratio of nano antimony tin oxide, nano titanium dioxide and nano silicon dioxide is 1~5:1~5:1~5 .

Further, the particle size of the nanomaterial is 20-80 nm.

Further, the dispersant is a mixture of sodium tripolyphosphate/polyethylene glycol 200, and the mass ratio of the two in the mixture of sodium tripolyphosphate/polyethylene glycol 200 is 1:20～50.

Further, the dispersant is a mixture of propylene glycol/butylene glycol/p-propylene glycol; the mass ratio of the three in the mixture of propylene glycol/butylene glycol/p-propylene glycol is 1~5:1~5:1~5.

Further, the diameter of the nanomaterial-modified PBT spinning is 0.04-0.2 mm, the monofilament strength is ≥2.5 cn/dtex, the elongation at break is 20-40%, and the limiting oxygen index is 25-40%.

Further, the nanomaterial-modified PBT spinning is prepared by the following method:

Step 1) Take the nanomaterials and mix them evenly, add polybutylene terephthalate (PBT) into a high-speed mixer and stir to form a mixed state in which the nanomaterials are evenly adsorbed on the surface of PBT;

Step 2) Add the substance and dispersant in the mixed state of step 1) into the screw extruder, and then extrude and cool to obtain nanomaterial-modified PBT spinning after fusion and uniform dissolution.

Further, the particle size of the substance in the mixed state in the step 1) is 100-150 nm.

Further, the screw extruder has a screw length-diameter ratio of 30 to 40:1, a screw speed of 100 to 250 r/min, and a screw temperature of 200 to 300°C.

The addition of dispersant makes the dispersion of nanomaterials in polybutylene terephthalate more uniform, which can optimize the crystallization properties of fibers in the subsequent spinning process, thereby improving the plumpness and fineness of spinning, and improving spinning. strength. The use of nanomaterials can make the nanomaterial-modified PBT spinning structure plump and dense, with uniform layers, improve the viscosity of polybutylene terephthalate, and ensure the transparency and elasticity of spinning.

Beneficial effects:

The invention provides a nanomaterial-modified PBT spinning, and the obtained nanomaterial-modified PBT spinning has rich and diverse structures, plump, fine, and uniform layers, just like natural growth; the nanomaterial-modified PBT spinning wool is greatly improved. The ability to catch powder is several times more;

The skin feels soft, delicate and comfortable; it effectively supports various high-quality and personalized follow-up processing requirements, which is efficient and convenient; the elasticity, viscosity, transparency and other performance indicators are excellent, and the overall performance is excellent;

There is a broad space for technological improvement, and a number of functional developments can be carried out continuously; it is a kind of PBT modified structure spinning that is safe and environmentally friendly, and has a rich and diverse structure.

Description of drawings

Fig. 1 Electron microscope image of existing PBT spinning;

Fig. 2 Electron microscope image of the nanomaterial-modified PBT spinning prepared in the preferred embodiment of the present invention.

Detailed ways

The present invention will be further described below with specific examples, but the present invention is not limited by the following examples. Those skilled in the art can learn from the content of this document and appropriately improve the process parameters to achieve. It should be particularly pointed out that all similar replacements and modifications are obvious to those skilled in the art, and they are all deemed to be included within the protection scope of the present invention. The method and application of the present invention have been described through the preferred embodiments, and it is obvious that relevant persons can make changes or appropriate changes and combinations of the methods and applications described herein without departing from the content, spirit and scope of the present invention to achieve and Apply the technology of the present invention.

Example 1

A nanomaterial-modified PBT spinning, in parts by weight, comprises 60 parts of polybutylene terephthalate, 30 parts of nanomaterials and 10 parts of dispersants, wherein the nanomaterials are nanometer tin antimony oxide, The mass ratio of nano titanium dioxide and nano silicon dioxide is 1:1:1; the dispersant is sodium tripolyphosphate/polyethylene glycol 200 with a mass ratio of 1:20.

The preparation process is as follows:

The polybutylene terephthalate and nanomaterials are stirred and mixed evenly in a high-speed mixer to form a mixed state in which the nanomaterials are evenly adsorbed on the surface of PBT, and the particle size is 100nm; the mixed raw materials and dispersants are added to the screw extruder. In the screw extruder, the screw length-diameter ratio of the screw extruder is 40:1, the screw speed is 100r/min, the screw temperature is 300 ° C, and the extrusion spinning is carried out through the screw extruder; the cooling adopts a blower cooling, and the temperature is normal temperature state, the cooling length is 8m, the cooled monofilament is stretched in one and two stages, the temperature is 300°C, the total stretching ratio is 2~3 times, and the stretched monofilament is wound up and wound.

The diameter of the prepared nanomaterial-modified PBT spinning is 0.04-0.2 mm, the single-filament strength is ≥2.5 cn/dtex, the elongation at break is 20-40%, and the limiting oxygen index is 25-40%. Its electron microscope image is shown in Figure 2a.

Example 2

A kind of PBT spinning of nanometer material modification, in parts by weight, comprises 60 parts of polybutylene terephthalate, 30 parts of nanometer materials and 10 parts of dispersant, and described nanometer material is that mass ratio is 1: 5:5 mixture of nano-tin antimony oxide, nano-titanium dioxide and nano-silicon dioxide; the dispersant is a mixture whose mass ratio is 1:50 sodium tripolyphosphate/polyethylene glycol 200.

The preparation process is as follows:

Stir and mix the polybutylene terephthalate and nanomaterials in a high-speed mixer to form a mixed state in which the nanomaterials are evenly adsorbed on the surface of PBT, with a particle size of 150nm; add the mixed raw materials and dispersant to the screw extruder In the screw extruder, the screw length-diameter ratio of the screw extruder is 30:1, the screw speed is 250r/min, the screw temperature is 200 ° C, and the extrusion spinning is carried out through the screw extruder; cooling adopts liquid cooling, and the temperature is 0 -10℃, the cooling length is 2~3m, the cooled monofilament is stretched in one and two stages, the temperature is 200℃, the total stretching ratio is 5~6 times, the stretched monofilament is wound up .

The diameter of the prepared nanomaterial-modified PBT spinning is 0.04-0.2 mm, the single-filament strength is ≥2.5 cn/dtex, the elongation at break is 20-40%, and the limiting oxygen index is 25-40%. Its electron microscope image is shown in Figure 2b.

Example 3

A nanomaterial-modified PBT spinning, in parts by weight, comprises 65 parts of polybutylene terephthalate, 25 parts of nanomaterials and 10 parts of dispersant, wherein the nanomaterials are: A mixture of nano-tin antimony oxide, nano-titanium dioxide, and nano-silicon dioxide in a mass ratio of 5:1:1; the dispersant is a mixture of sodium tripolyphosphate/polyethylene glycol 200 in a mass ratio of 1:30.

The preparation process is as follows:

Stir and mix the polybutylene terephthalate and nanomaterials in a high-speed mixer to form a mixed state in which the nanomaterials are evenly adsorbed on the surface of PBT, with a particle size of 150nm; add the mixed raw materials and dispersant to the screw extruder In the screw extruder, the screw length-diameter ratio of the screw extruder is 35:1, the screw speed is 200r/min, the screw temperature is 250°C, and the extrusion spinning is carried out through the screw extruder; cooling adopts liquid cooling, and the temperature is 0 -10°C, the cooling length is 7~8m, the cooled monofilament is stretched in one and two stages, the temperature is 250°C, the total stretching ratio is 4~5 times, and the stretched monofilament is wound up. .

The diameter of the prepared nanomaterial-modified PBT spinning is 0.04-0.2 mm, the single-filament strength is ≥2.5 cn/dtex, the elongation at break is 20-40%, and the limiting oxygen index is 25-40%. Its electron microscope image is shown in Figure 2c.

Example 4

A nanomaterial-modified PBT spinning, in parts by weight, comprises 60 parts of polybutylene terephthalate, 25 parts of nanomaterials and 15 parts of dispersant, wherein the nanomaterials are: A mixture of nano-tin antimony oxide, nano-titanium dioxide and nano-silicon dioxide with a mass ratio of 3:1:1; the dispersant is a mixture of propylene glycol/butanediol/p-propylene glycol with a mass ratio of 1:5:5.

The preparation process is as follows:

The polybutylene terephthalate and nanomaterials are stirred and mixed evenly in a high-speed mixer to form a mixed state in which the nanomaterials are evenly adsorbed on the surface of PBT, with a particle size of 120nm; the mixed raw materials and dispersants are added to the screw extruder. In the screw extruder, the screw length-diameter ratio of the screw extruder is 35:1, the screw speed is 150r/min, the screw temperature is 275 ° C, and the extrusion spinning is carried out by the screw extruder; cooling adopts liquid cooling, and the temperature is 0 ~10℃, the cooling length is 7~8m, the cooled monofilament is stretched in one and two stages, the temperature is 250℃, the total stretching ratio is 4~5 times, the stretched monofilament is wound up .

The diameter of the prepared nanomaterial-modified PBT spinning is 0.04-0.2 mm, the single-filament strength is ≥2.5 cn/dtex, the elongation at break is 20-40%, and the limiting oxygen index is 25-40%. Its electron microscope image is shown in Figure 2d.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims (6)

1. PBT spinning of a kind of nanomaterial modification is characterized in that, in parts by weight, comprises 60～90 parts of polybutylene terephthalate, 25～30 parts of nanomaterials and 10～15 parts of dispersant share, The nanomaterial is a mixture of nanometer antimony tin oxide, nanometer titanium dioxide, and nanometer silicon dioxide, and the mass ratio of nanometer antimony tin oxide, nanometer titanium dioxide, and nanometer silicon dioxide is 1-5:1-5:1-5; The dispersant is a mixture of sodium tripolyphosphate/polyethylene glycol 200, and the mass ratio of the two in the mixture of sodium tripolyphosphate/polyethylene glycol 200 is 1:20-50. 2. the PBT spinning of nanomaterial modification according to claim 1, is characterized in that, The particle size of the nanomaterial is 20-80 nm. 3. The nanomaterial-modified PBT spinning according to claim 1, wherein the diameter of the nanomaterial-modified PBT spinning is 0.04-0.2 mm, the monofilament strength is ≥2.5cn/dtex, and the The elongation is 20-40%, and the limiting oxygen index is 25-40%. 4. The PBT spinning modified by nanomaterials according to claim 1, is characterized in that, the PBT spinning modified by nanomaterials is prepared by the following method: Step 1) get the nanomaterials and mix them with homogeneously. Polybutylene terephthalate (PBT) is added to the high-speed mixer and stirred to form a mixed state in which nanomaterials are evenly adsorbed on the surface of PBT; Step 2) Add the substance and dispersant in the mixed state of step 1) into the screw extruder, and then extrude and cool to obtain nanomaterial-modified PBT spinning after uniform dissolution. 5 . The nanomaterial-modified PBT spinning according to claim 4 , wherein the particle size of the substance in the mixed state in the step 1) is 100-150 nm. 6 . 6. The nanomaterial-modified PBT spinning according to claim 4, wherein the screw extruder has a screw length-diameter ratio of 30 to 40:1, a screw rotation speed of 100 to 250 r/min, and the screw The temperature is 200 to 300°C.

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