CN106001393A - Environment-friendly foundry sand serving as binder and formed by modifying animal glue through chitosan and preparation method of environment-friendly foundry sand - Google Patents
Environment-friendly foundry sand serving as binder and formed by modifying animal glue through chitosan and preparation method of environment-friendly foundry sand Download PDFInfo
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- CN106001393A CN106001393A CN201610457057.3A CN201610457057A CN106001393A CN 106001393 A CN106001393 A CN 106001393A CN 201610457057 A CN201610457057 A CN 201610457057A CN 106001393 A CN106001393 A CN 106001393A
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- animal glue
- sand
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- chitosan
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C1/00—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds
- B22C1/16—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by the use of binding agents; Mixtures of binding agents
- B22C1/20—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by the use of binding agents; Mixtures of binding agents of organic agents
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- Chemical & Material Sciences (AREA)
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- Mechanical Engineering (AREA)
- Adhesives Or Adhesive Processes (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Mold Materials And Core Materials (AREA)
Abstract
The invention discloses environment-friendly foundry sand serving as a binder and formed by modifying animal glue through chitosan. According to the invention, chitosan is utilized to modify animal glue so as to prepare a novel foundry sand binder; according to the binder, firstly, etherification treatment is carried out on animal glue solution, and then, the animal glue solution and chitosan solution are mixed to react and crosslinked under the action of glutaraldehyde; the binder is high in bonding strength and curing speed; in addition, Sodium alginate mixed with the sand in advance can be crosslinked and hybridized with calcium chloride to form a high-ventilate micropore passage, so that the breathability of the foundry sand is effectively improved. Compared with a traditional product, the environment-friendly foundry sand is more environment-friendly, effectively improves the casting quality, meets the development demand of the current industry, and has broad application prospect.
Description
Technical field
The present invention relates to casting sand technical field, particularly relate to a kind of environmental protection molding sand using chitin modified animal glue as bonding agent and preparation method thereof.
Background technology
Molding sand refers to the material in casting for moulding, and molding sand is typically mixed according to a certain percentage by Modeling Materials such as Foundry sand, moulding sand binder and additional things.Molding sand is different by binding agent used, can be divided into clay-bonded sand, water-glass sand, cement bonded sand, resin sand etc..Molding sand effect in Foundry Production is particularly important, and the casting wasted product caused because of the poor quality of molding sand accounts for the 30～50% of the total waste product of foundry goods.Judge on ordinary meaning that moulding-sand property is mainly reflected in the following aspects: (1) has higher intensity and heat stability；(2) ability that good mobility, i.e. molding sand are mutually shifted between sand grains under external force or action of gravity own；(3) certain plasticity, i.e. molding sand deform under external force, can keep the ability of the shape given after external force is removed；(4) preferably breathability, i.e. molding sand hole is through the ability of gas；(5) high collapsibility, it is easy to defeated and dispersed cleaning.
Along with industrial expansion, requirement to foundry industry is more and more higher, and the quality of molding sand is the key factor being related to casting quality, the main flow molding sand of existing market mainly have waterglass, clay etc. one class inorganic adhesive molding sand and the organic adhesive molding sand of class such as synthetic resin, dextrin.To be primarily present collapsibility poor for the inorganic adhesive class molding sand of main flow in the market, the easy moisture absorption, the defects such as old sand utilization rate is low；Although resin sand collapsibility is good, casting accuracy is high, but it easily produces pollution gas in casting process." research of a kind of composite modified animal glue bonding agent preparation technology " literary composition describes the molding sand using modified animal glue as bonding agent, such molding sand environmental protection is degradable, defeated and dispersed effective, feasible developing direction is provided for developing novel molding sand, yet with the natural attribute of animal glue, actual application improves adhesion strength, accelerates curing rate and be still the emphasis of research.
Summary of the invention
The object of the invention is contemplated to make up the defect of prior art, it is provided that a kind of environmental protection molding sand using chitin modified animal glue as bonding agent and preparation method thereof.
The present invention is achieved by the following technical solutions:
A kind of environmental protection molding sand using chitin modified animal glue as bonding agent, this molding sand is made up of the raw material of following weight portion: 200-400 mesh quartz sand old sand 50-60,200-300 mesh mullite lightweight aggregate 20-30, discarded ultra fine sand 10-15, chitin modified animal glue bonding agent 10-15, concentration be sodium alginate aqueous solution 4-5 of 5-10%, concentration be the calcium chloride water 6-10 of 1-10%.
Described chitin modified animal glue bonding agent is made up of the raw material of following weight portion: chitosan 5-8, animal glue 30-40,3-chloro-2-hydroxypropyl-trimethyl ammonium chloride 1-2, dilute nitric acid solution are appropriate, mass concentration is the glutaraldehyde water solution 5-8 of 10-15%, deionized water 30-50；Its preparation method is: first mixed by the deionized water of animal glue with 20-30 weight portion, it is heated to 50-60 DEG C, stirring adds 3-chloro-2-hydroxypropyl-trimethyl ammonium chloride after forming homogeneous solution, etherificate gelatin solution is made standby after continuing stirring mixing 5-6h, then chitosan is put in the deionized water of surplus, add appropriate dilute nitric acid solution, regulation system pH value is 4-5, after stirring is completely dissolved to chitosan, dropping is etherified gelatin solution, dropping limit, limit is stirred, glutaraldehyde water solution is added after dropping, stirring mixing 4-5h, obtain described chitin modified animal glue bonding agent.
The preparation method of this molding sand is: first with sodium alginate aqueous solution stirring, quartz sand old sand, mullite lightweight aggregate, discarded ultra fine sand are mixed 50-80min, it is subsequently added calcium chloride water, continue stirring mixing 3-5h, stirring adds chitin modified animal glue bonding agent mixing 5-10min after terminating, and to obtain final product.
The present invention utilizes chitosan to be modified animal glue processing, and prepares a kind of novel molding sand bonding agent, and gelatin solution etherificate is first processed by this bonding agent, subsequently by itself and chitosan solution hybrid reaction, cross-linking under glutaraldehyde effect, this bonding agent adhesive strength is high, and curing rate is fast；In addition the sodium alginate being pre-mixed with sand material and the cross-linking hydridization of calcium chloride, form the micro channel that height is ventilative, effectively raise type sand permeability.Molding sand prepared by the present invention, than traditional product more environmental protection, effectively improves casting quality, suits the growth requirement of current industry, has broad application prospects.
Detailed description of the invention
This embodiment molding sand is made up of the raw material of following weight portion: the calcium chloride water 6 that sodium alginate aqueous solution 4 that 200 mesh quartz sand old sand 50,200 mesh mullite lightweight aggregates 20, discarded ultra fine sand 10, chitin modified animal glue bonding agent 10, concentration are 5%, concentration are 1%.
The most chitin modified animal glue bonding agent is made up of the raw material of following weight portion: glutaraldehyde water solution 5, the deionized water 30 that chitosan 5, animal glue 30,3-chloro-2-hydroxypropyl-trimethyl ammonium chloride 1, dilute nitric acid solution are appropriate, mass concentration is 10%；Its preparation method is: first mixed by the deionized water of animal glue and 20 weight portions, it is heated to 50 DEG C, stirring adds 3-chloro-2-hydroxypropyl-trimethyl ammonium chloride after forming homogeneous solution, etherificate gelatin solution is made standby after continuing stirring mixing 5h, then chitosan is put in the deionized water of surplus, add appropriate dilute nitric acid solution, regulation system pH value is 4, after stirring is completely dissolved to chitosan, dropping is etherified gelatin solution, dropping limit, limit is stirred, glutaraldehyde water solution is added after dropping, stirring mixing 4h, obtain described chitin modified animal glue bonding agent.
The preparation method of this molding sand, described preparation method is: first with sodium alginate aqueous solution stirring, quartz sand old sand, mullite lightweight aggregate, discarded ultra fine sand are mixed 50min, it is subsequently added calcium chloride water, continue stirring mixing 3h, stirring adds chitin modified animal glue bonding agent mixing 5min after terminating, and to obtain final product.
The result that the molding sand that this embodiment prepares obtains according to associated test standards's test is as follows:
Green compression strength: 80.5KPa；Compact rate of molding: 35.8%；Air penetrability: 106；Hot green tensile strength: 41.2KPa；Shatter index: 90%.
Claims (3)
1. one kind using chitin modified animal glue as the environmental protection molding sand of bonding agent, it is characterized in that, this molding sand is made up of the raw material of following weight portion: 200-400 mesh quartz sand old sand 50-60,200-300 mesh mullite lightweight aggregate 20-30, discarded ultra fine sand 10-15, chitin modified animal glue bonding agent 10-15, concentration be sodium alginate aqueous solution 4-5 of 5-10%, concentration be the calcium chloride water 6-10 of 1-10%.
A kind of environmental protection molding sand using chitin modified animal glue as bonding agent, it is characterized in that, described chitin modified animal glue bonding agent is made up of the raw material of following weight portion: chitosan 5-8, animal glue 30-40,3-chloro-2-hydroxypropyl-trimethyl ammonium chloride 1-2, dilute nitric acid solution are appropriate, mass concentration is the glutaraldehyde water solution 5-8 of 10-15%, deionized water 30-50；Its preparation method is: first mixed by the deionized water of animal glue with 20-30 weight portion, it is heated to 50-60 DEG C, stirring adds 3-chloro-2-hydroxypropyl-trimethyl ammonium chloride after forming homogeneous solution, etherificate gelatin solution is made standby after continuing stirring mixing 5-6h, then chitosan is put in the deionized water of surplus, add appropriate dilute nitric acid solution, regulation system pH value is 4-5, after stirring is completely dissolved to chitosan, dropping is etherified gelatin solution, dropping limit, limit is stirred, glutaraldehyde water solution is added after dropping, stirring mixing 4-5h, obtain described chitin modified animal glue bonding agent.
A kind of preparation method of the environmental protection molding sand using chitin modified animal glue as bonding agent, it is characterized in that, described preparation method is: first with sodium alginate aqueous solution stirring, quartz sand old sand, mullite lightweight aggregate, discarded ultra fine sand are mixed 50-80min, it is subsequently added calcium chloride water, continue stirring mixing 3-5h, stirring adds chitin modified animal glue bonding agent mixing 5-10min after terminating, and to obtain final product.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610457057.3A CN106001393A (en) | 2016-06-22 | 2016-06-22 | Environment-friendly foundry sand serving as binder and formed by modifying animal glue through chitosan and preparation method of environment-friendly foundry sand |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610457057.3A CN106001393A (en) | 2016-06-22 | 2016-06-22 | Environment-friendly foundry sand serving as binder and formed by modifying animal glue through chitosan and preparation method of environment-friendly foundry sand |
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| CN106001393A true CN106001393A (en) | 2016-10-12 |
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| CN201610457057.3A Pending CN106001393A (en) | 2016-06-22 | 2016-06-22 | Environment-friendly foundry sand serving as binder and formed by modifying animal glue through chitosan and preparation method of environment-friendly foundry sand |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106746788A (en) * | 2016-12-09 | 2017-05-31 | 武汉理工大学 | A kind of chitin modified geopolymer gelled material |
| CN118595391A (en) * | 2024-06-27 | 2024-09-06 | 天阳新材料科技有限公司 | Environmentally friendly resin sand and rapid curing method thereof |
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| CN118595391A (en) * | 2024-06-27 | 2024-09-06 | 天阳新材料科技有限公司 | Environmentally friendly resin sand and rapid curing method thereof |
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Application publication date: 20161012 |