CN107602938A - A kind of preparation method of starch/EVA syntactic foam - Google Patents
A kind of preparation method of starch/EVA syntactic foam Download PDFInfo
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- CN107602938A CN107602938A CN201710857094.8A CN201710857094A CN107602938A CN 107602938 A CN107602938 A CN 107602938A CN 201710857094 A CN201710857094 A CN 201710857094A CN 107602938 A CN107602938 A CN 107602938A
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- starch
- eva
- syntactic foam
- catalyst
- plasticizer
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Abstract
A kind of starch/ethylene-vinyl acetate copolymer（EVA）The preparation method of syntactic foam, it is characterised in that：Starch, plasticizer, EVA, catalyst, filler are well mixed in high-speed mixer, the addition of each thing is 100 parts of starch, 0 ~ 40 part of plasticizer, EVA20 ~ 100 part, 0.5 ~ 10 part of catalyst, 0 ~ 200 part of filler, mixture extrusion molding at 120 ~ 220 DEG C, so as to obtain starch/EVA syntactic foam.During melting extrusion, EVA vinegar ester group decomposites acetic acid and gasified in the presence of catalyst, so that composite foams, the cell uniformity of syntactic foam is good, water-tolerant.
Description
Technical field
The invention belongs to macromolecule material preparation area, particularly relates to a kind of starch/ethylene-vinyl acetate copolymer
（EVA）The preparation method of syntactic foam, belong to the high value added utilization of renewable biomass resources.
Background technology
Foam plastic density is small, volume is big, is not easy to collection neutralizes transport, and chemical property itself is stable, has resistance to old
The features such as changing, be anticorrosive, threat of the growing foam plastic waste to the ecosystem be increasing cause it is serious " white
Color pollutes ", many countries, which have made laws, in the world forbids the foam article for producing difficult degradation.China's foamed plastics in recent years
Yield is every year with about 10% speed increase.Starch is a kind of wide material sources, cheap, fully biodegradable abundant
Renewable resource, there is good foam performance.Application of the starch in foamed material will largely mitigate at present
The huge environmental pressure that foam industry faces.
Packaging journal, 2014,6（1）：40-43 have studied in influence of the technological parameter to starch/EVA composite foam materials,
It was found that：When screw speed is arranged to 120r/min, starch/EVA composite extrudate plasticizing effects are optimal；Appropriate feeding speed
Degree, can avoid " blocking " phenomenon of " building bridge "；When die temperature is arranged to 160 DEG C, foaming agent can be coordinated to reach abundant decomposition, make bubble
Hole maximizes；When raw aqueous rate is 14%, the expansion rate of composite foam material reaches maximum, is 14.4%.Patent
CN201510237554.8 discloses a kind of preparation method of degradable foamed plastics, and it is made up of following raw materials：String,
Starch, polyvinyl alcohol, nano silicon, plant fibre surface modifying agent, starch composite plasticizer and water, by string plus
Enter plant fibre surface modifying agent and be modified processing；The progress of starch composite plasticizer will be added after starch plus water Heat Gelatinization
Plastics processing；Starch, polyvinyl alcohol and nano silicon after the string of surface modification, plasticizing is sufficiently stirred
It is even, it is made homogeneous somaplasm material, the foaming of further vapor, hot-forming obtains degradable foamed plastics.
The content of the invention
The purpose of the present invention is exactly to provide a kind of starch/EVA for the weak point in the presence of above-mentioned prior art
The preparation method of syntactic foam, it can solve the problem that the cell uniformity and water resistance for improving foamed plastics.
In order to solve the above technical problems, one aspect of the present invention is：A kind of starch/EVA compound vacuoles are provided
The preparation method of foam plastics, comprises the following steps：
Starch, plasticizer, EVA, catalyst, filler are well mixed in high-speed mixer, the addition of each thing is
100 parts of starch, 0 ~ 40 part of plasticizer, EVA20 ~ 100 part, 0.5 ~ 10 part of catalyst, 0 ~ 200 part of filler, the mixture is 120
Extrusion molding at ~ 220 DEG C, so as to obtain starch/EVA syntactic foam.
Starch used in the present invention is cornstarch, in wheaten starch, potato starch, farina any one or
It is several.
Plasticizer used in the present invention is any one in glycerine, glucose, sucrose, polyethylene glycol, formamide, sorbierite
Kind is several.
Catalyst used in the present invention is maleic anhydride, phthalic anhydride, sodium carbonate, potassium carbonate, sodium acetate, calcium acetate
In any one or a few.
Filler used in the present invention is calcium carbonate, clay, bentonite, talcum powder, white carbon, montmorillonite, lignin, bamboo
Any one or a few in fiber.
Beneficial effects of the present invention are as follows：
It is raw materials used safe and non-toxic, degradable；
EVA good toughness, has excellent water-resistance, and improves the elasticity and water resistance of starch/EVA syntactic foam；
Foaming agent is EVA, and residue is macromolecule after foaming, and foamed gas are acetic gas, foamed gas different from the past；
The compatibility of EVA and starch is good, is uniformly dispersed in starch/EVA composites, therefore EVA is released under catalyst action
The acetic acid atomisation station of releasing is evenly distributed, so as to generating uniform stomata in the composite, i.e. starch/EVA composite foams
The stomata of plastics is uniformly dispersed.
Embodiment
The present invention is described in further detail below with reference to embodiment.It is necessarily pointed out that following examples are served only for
The present invention is further described, it is impossible to be interpreted as limiting the scope of the invention, the person skilled in the art in the field
Some nonessential modifications and adaptations can be made to the present invention according to the invention described above content.
Cornstarch, glycerine, EVA, maleic anhydride are well mixed by embodiment 1. in high-speed mixer, each thing
Addition be 100 parts of cornstarch, 40 parts of glycerine, EVA20 parts, 1 part of maleic anhydride, the mixture is extruded at 150 DEG C
Type, so as to obtain water-tolerant, the uniform starch of stomata/EVA syntactic foam, expansion rate reaches 10.3%.
Potato starch, formamide, EVA, maleic anhydride are well mixed by embodiment 2. in high-speed mixer, described each
The addition of thing is 100 parts of potato starch, 35 parts of formamide, EVA40 parts, 2 parts of maleic anhydride, and the mixture squeezes at 160 DEG C
Go out shaping, so as to obtain water-tolerant, the uniform starch of stomata/EVA syntactic foam, expansion rate reaches 13.5%.
Wheaten starch, glycerine, EVA, sodium carbonate and lignin are well mixed by embodiment 3. in high-speed mixer, institute
The addition for stating each thing is 100 parts of wheaten starch, 35 parts of glycerine, EVA60 parts, 1 part of sodium carbonate, 60 parts of lignin, the mixture
The extrusion molding at 140 DEG C, so as to obtain water-tolerant, the uniform starch of stomata/EVA syntactic foam, expansion rate reaches
16.7%。
Cornstarch, glycerine, EVA, calcium acetate and talcum powder are well mixed in high-speed mixer, each thing adds
It is 100 parts of cornstarch to enter amount, and 40 parts of glycerine, EVA80 parts, 3 parts of calcium acetate, 110 parts of talcum powder, the mixture is at 160 DEG C
Extrusion molding, so as to obtain water-tolerant, the uniform starch of stomata/EVA syntactic foam, expansion rate reaches 18.1%.
Claims (5)
- A kind of 1. starch/ethylene-vinyl acetate copolymer（EVA）The preparation method of syntactic foam, it is characterised in that：It is described Method comprises the steps：Starch, plasticizer, EVA, catalyst, filler are well mixed in high-speed mixer, the addition of each thing is 100 parts of starch, 0 ~ 40 part of plasticizer, EVA20 ~ 100 part, 0.5 ~ 10 part of catalyst, 0 ~ 200 part of filler, the mixture is 120 Extrusion molding at ~ 220 DEG C, so as to obtain starch/EVA syntactic foam.
- 2. according to the method for claim 1, it is characterised in that：Starch used is cornstarch, wheaten starch, potato shallow lake Any one or a few in powder, farina.
- 3. according to the method for claim 1, it is characterised in that：Plasticizer used is glycerine, glucose, sucrose, poly- second Any one or a few in glycol, formamide, sorbierite.
- 4. according to the method for claim 1, it is characterised in that：Catalyst used be maleic anhydride, phthalic anhydride, Any one or a few in sodium carbonate, potassium carbonate, sodium acetate, calcium acetate.
- 5. according to the method for claim 1, it is characterised in that：Filler used is calcium carbonate, clay, bentonite, cunning Any one or a few in stone flour, white carbon, montmorillonite, lignin, bamboo fibre.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710857094.8A CN107602938A (en) | 2017-09-21 | 2017-09-21 | A kind of preparation method of starch/EVA syntactic foam |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710857094.8A CN107602938A (en) | 2017-09-21 | 2017-09-21 | A kind of preparation method of starch/EVA syntactic foam |
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| CN107602938A true CN107602938A (en) | 2018-01-19 |
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| CN201710857094.8A Pending CN107602938A (en) | 2017-09-21 | 2017-09-21 | A kind of preparation method of starch/EVA syntactic foam |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111073060A (en) * | 2019-12-31 | 2020-04-28 | 宁波大榭开发区综研化学有限公司 | High-buffering degradable foam and foam adhesive tape and preparation method thereof |
| CN111333947A (en) * | 2020-03-25 | 2020-06-26 | 江苏瑞杰特环保科技有限公司 | Blue algae-based nano biological membrane material and preparation method thereof |
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| CN102226015A (en) * | 2011-06-11 | 2011-10-26 | 吴宝玲 | Starch composite foamed material and its production method |
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| CN102372858A (en) * | 2010-08-18 | 2012-03-14 | 陈天云 | Preparation method for starch-based biodegradable plastic |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111073060A (en) * | 2019-12-31 | 2020-04-28 | 宁波大榭开发区综研化学有限公司 | High-buffering degradable foam and foam adhesive tape and preparation method thereof |
| CN111333947A (en) * | 2020-03-25 | 2020-06-26 | 江苏瑞杰特环保科技有限公司 | Blue algae-based nano biological membrane material and preparation method thereof |
| CN111333947B (en) * | 2020-03-25 | 2022-10-14 | 江苏瑞杰特环保科技有限公司 | Blue algae-based nano biological membrane material and preparation method thereof |
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