Composite crosslinking amylomaize based fully degradable material and preparation method thereof

A technology of corn starch and high linear chain, which is applied in the field of corn starch-based fully degradable materials and its preparation, and can solve the problems of low mechanical properties

Inactive Publication Date: 2010-09-15
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The present invention aims to solve the problem of low mechanical properties of existing high-amylose-based degradable materials and starch-degradable materials modified by physical or chemical methods, and provides composite cross-linked high-amylose corn starch-based fully degradable materials and preparation methods thereof

Method used

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  • Composite crosslinking amylomaize based fully degradable material and preparation method thereof

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specific Embodiment approach 1

[0008] Specific embodiment one: The composite cross-linked high-amylose corn starch-based fully degradable material of this embodiment is made of composite cross-linked high-amylose corn starch, polycaprolactone, calcium carbonate, solid paraffin, stearic acid and glycerin, wherein the composite The mass ratio of cross-linked high-amylose corn starch to polycaprolactone is 1:1-4, the mass of calcium carbonate is 6%-9% of the mass of the mixture of compound cross-linked high-amylose corn starch and polycaprolactone, and solid paraffin The mass of stearic acid is 0.1% to 0.5% of the mass of the mixture of compound crosslinked high amylose corn starch and polycaprolactone, and the mass of stearic acid is 0.5% to 0.5% of the mass of the mixture of compound crosslinked high amylose corn starch and polycaprolactone 1.0%, the mass of glycerin is 20% to 40% of the mass of the mixture of composite cross-linked high-amylose corn starch and polycaprolactone; the composite cross-linked hig...

specific Embodiment approach 2

[0010] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the mass-number ratio of composite cross-linked high-amylose cornstarch to polycaprolactone is 1:1.5-3.5. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0011] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that the mass-number ratio of composite cross-linked high-amylose cornstarch to polycaprolactone is 1:2.5. Others are the same as in the first or second embodiment.

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Abstract

The invention discloses a composite crosslinking amylomaize based fully degradable material and a preparation method thereof, relating to a cornstarch based fully degradable material and a preparation method thereof and solving the problem that the traditional amylomaize based degradable material and a starch degradable material modified physically or chemically have poor mechanical property. The product is prepared from composite crosslinking amylomaize, polycaprolactone, calcium carbonate, solid paraffin, stearic acid and glycerol, wherein the composite crosslinking amylomaize is prepared form amylomaize, epichlorohydrin and sodium hexametaphosphate. The preparation method comprises the steps of adding the epichlorohydrin into the alkaline amylomaize and stirring; adding the sodium hexametaphosphate into the alkaline amylomaize and stirring, washing and filtering to obtain the composite crosslinking amylomaize; and finally mixing and calendaring the composite crosslinking amylomaize together with the calcium carbonate, the solid paraffin, the stearic acid and the glycerol. The composite crosslinking amylomaize based fully degradable material has the tensile strength of 28-40MPa and can be used as food wrappage and agricultural mulching films.

Description

technical field [0001] The invention relates to a cornstarch-based fully degradable material and a preparation method thereof. Background technique [0002] In recent years, white pollution, that is, plastic pollution in food packaging, catering industry, agricultural mulch, and domestic waste has become a major public hazard in the world. Starch is a material with wide sources, low price, short regeneration cycle and complete biodegradability. Starch-based biodegradable materials can not only alleviate resource problems, but also solve environmental pollution problems and achieve sustainable development of the packaging industry. Starch-containing degradable plastics have poor water resistance, poor wet strength, and their mechanical properties are seriously reduced when exposed to water. Water resistance is precisely the advantage of traditional plastics during use. Therefore, the starch base of starch-based degradable plastics has developed from ordinary starch to high-a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/04C08L3/14C08K13/02C08K3/26C08K5/01C08K5/09C08K5/053
Inventor 马莺李德海
Owner HARBIN INST OF TECH
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