Completely biodegradable resin made of non-staple grain plant modified starch and its preparation method

A modified starch and all-biological technology, applied in the field of all-biodegradable resin and its preparation, can solve the problems of poor compatibility between starch and carrier resin, poor physical and dimensional stability, and difficulty in making fine film products, etc., to achieve The effect of promoting the sustainable development of the national economy and society, excellent mechanical properties, and complete denaturation

Active Publication Date: 2012-04-11
SUZHOU HANFENG NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Corn is a staple food crop. The use of corn starch has the problem of competing with others for food. The coupling method has low coupling branching degree, poor compatibility between starch and carrier resin, rough surface of the product, and difficulty in making fine film products, and Problems such as easy oozing of starch; gelatinization method requires a large amount of solvents such as glycerin, etc., which occupy the space of the material, resulting in low starch content, insufficient mechanical properties, and poor physical and dimensional stability due to moisture. University, Sichuan University, Wuhan Huali Technology Co., Ltd. have also carried out corresponding research and development in thermoplastic starch, but the above problems still plague the practical application

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Embodiment 1: Get 100 kg of non-staple grain plant modified starch after the aforementioned drying, 20 kg of sorbitol, 10 kg of silicon dioxide opening agent, 30 kg of polylactic acid, succinic acid-terephthalic acid-butylene glycol copolymer 100kg, 100kg of succinic acid-adipic acid-butanediol copolymer, stir evenly, take out of the pot after about ten minutes, and put it into the TE75 twin-screw granulator for extrusion, air-cooling, and strand cutting.

[0022] Table 1: Process temperature table of twin-screw granulator

[0023] 1 group 125°C 2 groups 130°C 3 groups 135°C 4 groups 140℃ 5 groups 140°C 6 groups 140℃ 7 groups 135°C 8 groups 135°C 9 groups 135°C 10 groups 130°C 11 groups 125°C 12 groups 125°C Die head 125°C The actual temperature of the melt is 140°C

[0024] After heating to the above set temperature, keep warm for 30 minutes, turn on the host, control the current of the host at about 200A, control the melt pres...

Embodiment 2

[0025]Embodiment 2: Take 100 kg of the non-staple grain plant modified starch mentioned above and put it into the mixer, then add 25 kg of mannitol, 2 kg of ADR-4268CS type chain extender, 80 kg of polylactic acid, and succinic acid-butylene glycol copolymerization Mix 80 kg of succinic acid-terephthalic acid-butylene glycol copolymer with 50 kg of succinic acid-terephthalic acid-butylene glycol copolymer and stir evenly. After about ten minutes, it will be out of the pot, and put into the hopper of a 75-type twin-screw sheet machine for extrusion and tableting.

[0026] Table 2: Process temperature table of twin-screw sheet unit

[0027] 1 group 135℃ 2 groups 140°C 3 groups 145°C 4 groups 145°C 5 groups 145°C 6 groups 150℃ Change screen 150℃ Mode 155℃ Mode 2 155°C Mode 3 160°C Mode 4 155°C Mode 5 155°C Elbow 150°C The actual temperature of the melt is 160°C

[0028] After heating to the above set temperature, keep warm for 30 minutes...

Embodiment 3

[0029] Embodiment 3: Take 100 kg of the non-staple grain plant modified starch mentioned above and put it into the mixer, then put 22 kg of xylitol into it, 15 kg of titanium dioxide anti-blocking agent, 50 kg of polylactic acid, succinic acid-terephthalic acid-butanedi 50kg of alcohol copolymer and 150kg of adipic acid-terephthalic acid-butylene glycol copolymer are stirred evenly. After about ten minutes, they are taken out of the pot and put into the TE75 twin-screw granulator for extrusion and air-cooled strand cutting. ,

[0030] Table 3: Process temperature table of twin-screw granulator

[0031] 1 group 140℃ 2 groups 140°C 3 groups 145°C 4 groups 150℃ 5 groups 150℃ 6 groups 150℃ 7 groups 155°C 8 groups 155℃ 9 groups 155°C 10 groups 150℃ 11 groups 145°C 12 groups 145°C Die head 150℃ The actual temperature of the melt is 160°C

[0032] After heating to the above set temperature, keep warm for 30 minutes, turn on the host, contro...

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PUM

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Abstract

The invention discloses a preparation method of a completely biodegradable resin made of non-staple grain plant modified starch. The method comprises the steps of: first putting non-staple grain plant starch into a reaction vessel, adding water to prepare it into starch milk, and heating it to a proper temperature, conducting stirring and washing, then adding chemicals into a water solution for modification grafting treatment, and then separating water and starch through centrifugation, and conveying the separated modified starch to an airflow drying system for dewatering and drying, then taking 100 parts of dried modified starch, adding 5-50 parts of a compatilizer, 2-15 parts of an anti-block agent, 0-100 parts of polylactic acid, and 150-250 parts of a completely biodegradable copolymer of dibasic acid and dibasic alcohol, and mixing them uniformly, carrying out extrusion granulating or tabletting under an appropriate temperature and pressure, thus obtaining a resin material or sheet special for complete biodegradation. The resin of the invention has both the usage function similar to ordinary plastic products and a complete biodegradability. And after being used and abandoned, the resin can be degraded into carbon dioxide and water that can be consumed by the environment.

Description

technical field [0001] The invention relates to a fully biodegradable resin made of non-staple grain plant modified starch and a preparation method thereof. Background technique [0002] Using renewable resources to prepare biodegradable materials is an important way. Natural polymer materials such as starch, cellulose, chitin, pullulan polysaccharide, and soybean protein are used as raw materials, and biodegradable plastics can be obtained through various modification and processing methods. product. From the comprehensive consideration of material cost, processability, mechanical properties, etc., starch-natural decomposable polymer materials and artificially synthesized biodegradable polymers and their composite systems are the key research and development objects. Since the beginning of the last century in our country, many enterprises have been researching and engaging in the development of this product. The more representative technologies include: Tianjin Danhai Co.,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L3/06C08L67/04C08L67/02B29C47/92C08B31/02B29C48/92
CPCB29C48/04B29C48/40B29C48/92B29C2948/92514B29C2948/92704B29C2948/92895B29C2948/92923
Inventor 陈明兴
Owner SUZHOU HANFENG NEW MATERIAL
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