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Starch polymer for preparing tableware and preparation method of starch polymer

A technology of polymer and starch, which is applied in the field of starch polymer and its preparation for the preparation of tableware, can solve the problems of starch with strong water absorption, defects, and inability to maintain a stable state for a long time, and achieve the effect of increasing the degradation rate and improving the heat preservation effect

Inactive Publication Date: 2021-02-26
安徽省怀宁县希望纸塑有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, due to the strong water absorption of starch, it cannot maintain a stable state for a long time after the product is made. Moreover, compared with traditional plastic products, the mechanical properties and processability of products made of starch have very obvious defects.
It is also these deficiencies that lead to various restrictions on the industrial application of starch-based materials.

Method used

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  • Starch polymer for preparing tableware and preparation method of starch polymer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The preparation of the starch polymer for preparing tableware comprises the following steps:

[0033] S1: Accurately weigh 60 kg of starch and 60 kg of lactic acid, disperse the starch into tetrahydrofuran, add lactic acid slowly under stirring, mix well, heat up to 60°C for 4 hours, and then filter and remove tetrahydrofuran to obtain surface lactic acid grafting modified starch;

[0034] S2: The surface lactic acid grafted modified starch prepared in S1 was vacuum-dried at 50° C. for 24 hours to obtain a dry surface lactic acid grafted modified starch;

[0035] S3: Accurately weigh 20 kg of polyvinyl alcohol, 10 kg of polybutylene succinate, 3 kg of dioctyl phthalate as a plasticizer and 3 kg of stannous chloride as a catalyst and dry The surface lactic acid grafted modified starch was mixed, and then stirred and reacted for 15 hours at a temperature of 140 ° C and a pressure of 0.05 MPa;

[0036] S4: Accurately weigh 10 kg of cellulose acetate propionate as an adhe...

Embodiment 2

[0039] The preparation of the starch polymer for preparing tableware comprises the following steps:

[0040] S1: Accurately weigh 70 kg of starch and 70 kg of lactic acid, disperse the starch into tetrahydrofuran, add lactic acid slowly under stirring, mix well, heat up to 70°C for 5 hours, and then filter and remove tetrahydrofuran to obtain surface lactic acid grafting modified starch;

[0041] S2: vacuum-dry the surface lactic acid grafted modified starch prepared in S1 for 30 hours at 60° C. to obtain dry surface lactic acid grafted modified starch;

[0042] S3: Accurately weigh 30 kg of polyvinyl alcohol, 15 kg of polybutylene succinate, 4 kg of dioctyl terephthalate as a plasticizer and 4 kg of stannous octoate as a catalyst and dry The surface lactic acid grafted modified starch was mixed, and then stirred and reacted for 16 hours at a temperature of 150°C and a pressure of 0.08MPa;

[0043]S4: Accurately weigh 15 kg of cellulose acetate succinate as an adhesion enhan...

Embodiment 3

[0046] The preparation of the starch polymer for preparing tableware comprises the following steps:

[0047] S1: Accurately weigh 80 kg of starch and 80 kg of lactic acid, disperse the starch into tetrahydrofuran, slowly add lactic acid under stirring, mix well, heat up to 80°C for 6 hours, and then filter and remove tetrahydrofuran to obtain surface lactic acid grafting modified starch;

[0048] S2: The surface lactic acid grafted modified starch prepared in S1 was vacuum-dried at 70° C. for 36 hours to obtain a dry surface lactic acid grafted modified starch;

[0049] S3: Accurately weigh 40 kg of polyvinyl alcohol, 20 kg of polybutylene succinate, 5 kg of dibutyl phthalate as a plasticizer and 5 kg of a mixture of stannous chloride and stannous octoate as a catalyst Mix with the dry surface lactic acid grafted modified starch prepared in S2, and then stir and react for 18 hours under the conditions of a temperature of 160°C and a pressure of 0.1MPa; in specific implementat...

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Abstract

The invention discloses a starch polymer for preparing tableware and a preparation method of the starch polymer in the related technical field of environment-friendly tableware manufacturing materials. The starch polymer comprises the following components in parts by weight: 60-80 parts of starch, 60-80 parts of lactic acid, 20-40 parts of polyvinyl alcohol, 10-20 parts of polybutylene succinate,10-20 parts of an adhesion enhancer, 5-10 parts of a compatilizer, 3-5 parts of a plasticizer, 3-5 parts of a chain extender, 3-5 parts of a catalyst, 1-3 parts of a waterproof agent, 1-3 parts of anantioxidant and 1-3 part of a foaming aid. Starch is subjected to graft modification through lactic acid, and the adhesion enhancer, compatilizer, plasticizer and chain extender are added, so that theplasticity of the starch polymer is improved, and the mechanical strength of a product prepared from the starch polymer is improved. The polymer is subjected to foaming treatment through the foamingaid, so that on one hand, the heat preservation effect is improved after tableware is prepared, and on the other hand, during degradation treatment, small foaming holes are beneficial to increasing the degradation speed of the tableware.

Description

technical field [0001] The invention relates to the related technical field of environmentally friendly tableware manufacturing materials, in particular to a starch polymer used for preparing tableware and a preparation method thereof. Background technique [0002] With the rapid development of the economy and the continuous advancement of science and technology, people's living standards are also improving day by day, and the application of plastic products in work and life is becoming more and more extensive. Especially after the rise of the food delivery industry, disposable tableware not only brought great convenience to people's lives, but also brought a heavy burden to the ecological environment. Although the garbage classification proposed by the state has been widely recognized by people, the habit of garbage classification does not develop overnight, but requires long-term cultivation. However, the heavy burden of waste disposal has become urgent. In order to bala...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L3/06C08L29/04C08L67/02C08L1/14C08L1/28C08L51/06C08K5/053C08K5/12C08J9/00
CPCC08J9/0061C08J9/0023C08J2303/06C08J2429/04C08J2467/02C08J2401/14C08J2401/28C08J2451/06
Inventor 刘立生
Owner 安徽省怀宁县希望纸塑有限责任公司
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