Modified starch-based toughened thermoplastic composite material and preparation method thereof

A composite material and thermoplastic technology, which is applied in the field of modified starch-based toughening thermoplastic composite materials and its preparation, can solve problems such as insufficient environmental protection of the toughening agent, and achieve the effects of low cost, easy industrialized production and high toughness.

Active Publication Date: 2017-12-26
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the sources of toughening agents are not environmentally friendly

Method used

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  • Modified starch-based toughened thermoplastic composite material and preparation method thereof
  • Modified starch-based toughened thermoplastic composite material and preparation method thereof
  • Modified starch-based toughened thermoplastic composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Mix 100 parts of corn starch (manufactured by Changchun Dacheng Corn Development Co., Ltd.) and 50 parts of dimethylformamide (manufactured by Sinopharm Chemical Reagent Co., Ltd.) at 60°C, stir and mix thoroughly for 30 minutes, and then add pyridine dropwise while stirring (produced by Sinopharm Chemical Reagent Co., Ltd.) 10 parts, after the dropwise addition is completed, continue to stir for 1 hour.

[0044] Then add 1 part of acryloyl chloride (produced by Shanghai Jingchun Biochemical Technology Co., Ltd.) dropwise and continue to stir for 30 minutes, add absolute ethanol (produced by Sinopharm Chemical Reagent Co., Ltd.) to wash, suction filter and dry.

[0045] Disperse 20 parts of the prepared modified starch, 0.1 part of potassium persulfate (produced by Sinopharm Chemical Reagent Co., Ltd.) in 50 parts of water, ultrasonically disperse to obtain an emulsion, add 10 parts of butyl acrylate (produced by Sinopharm Chemical Reagent Co., Ltd. ), stirred and react...

Embodiment 2

[0048] Mix 100 parts of corn starch (manufactured by Changchun Dacheng Corn Development Co., Ltd.) and 150 parts of dimethylformamide (manufactured by Sinopharm Chemical Reagent Co., Ltd.) at 60°C, stir and mix thoroughly for 30 minutes, and then add pyridine dropwise while stirring (produced by Sinopharm Chemical Reagent Co., Ltd.) 30 parts, after the dropwise addition was completed, continue to stir for 1 hour.

[0049]Then dropwise add 6 parts of acryloyl chloride (produced by Shanghai Crystal Pure Biochemical Technology Co., Ltd.), 14 parts of stearyl chloride (produced by Shanghai Crystal Pure Biochemical Technology Co., Ltd.) and continue stirring for 30 minutes. Group Chemical Reagent Co., Ltd.) washed, filtered and dried.

[0050] Disperse 20 parts of the prepared modified starch, 0.2 parts of potassium persulfate (produced by Sinopharm Chemical Reagent Co., Ltd.) in 100 parts of water, ultrasonically disperse to obtain an emulsion, add 30 parts of ethyl acrylate (prod...

Embodiment 3

[0053] Mix 100 parts of corn starch (manufactured by Changchun Dacheng Corn Development Co., Ltd.) and 200 parts of dimethylformamide (manufactured by Sinopharm Chemical Reagent Co., Ltd.) at 60°C, stir and mix thoroughly for 30 minutes, and then add pyridine dropwise while stirring (produced by Sinopharm Chemical Reagent Co., Ltd.) 50 parts, after the dropwise addition was completed, continue to stir for 1 hour.

[0054] Then dropwise add 25 parts of acryloyl chloride (produced by Shanghai Crystal Pure Biochemical Technology Co., Ltd.), 25 parts of stearyl chloride (produced by Shanghai Crystal Pure Biochemical Technology Co., Ltd.) and continue to stir for 30 minutes. Group Chemical Reagent Co., Ltd.) washed, filtered and dried.

[0055] 20 parts of the prepared modified starch, 0.5 parts of potassium persulfate (produced by Sinopharm Chemical Reagent Co., Ltd.) were dispersed in 200 parts of water, ultrasonically dispersed to obtain an emulsion, and 40 parts of ethyl acryla...

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Abstract

The invention discloses a modified starch-based toughened thermoplastic composite material and a preparation method thereof. The toughened thermoplastic composite material comprises 1-60 parts by weight of a starch-based graft copolymer and thermoplastic resin; the thermoplastic resin is at least one of polylactic acid, polyhydroxyalkanoate, polyformaldehyde, polyvinyl chloride, polymethyl methacrylate, polystyrene, polycarbonate, polyamide, polyester, polyphenyl ether, polyurethane and polypropylene; and the starch-based graft copolymer is formed by modifying natural starch, grafting an alkene monomer with the modified natural starch and polymerizing the grafted monomer. The preparation method is characterized in that all above components undergo melt blending according to corresponding use amounts in order to prepare the modified starch-based toughened thermoplastic composite material. Brittle plastic is toughened with the graft modified starch to realize the emulsifying process without an emulsifier and also realize the plasticizing processing of the thermoplastic composite material without adding a plasticizer, and the preparation method has the advantages of high production efficiency, low cost, simple technology and performance control.

Description

technical field [0001] The invention relates to the field of toughened thermoplastic materials, in particular to a modified starch-based toughened thermoplastic composite material and a preparation method thereof. Background technique [0002] Since the mid-to-late 1990s, my country’s grain harvest has been bumper year after year, and the national grain inventory has reached the highest level in history. According to statistics, even if the purchase volume of the year is not considered, the existing inventory of state-owned grain enterprises can meet the sales volume of more than one year. At present, there are a large amount of old and aged grains in our country. These grains cannot be used as human rations, and can only be used in low-value and high-pollution industries such as papermaking. Some crops such as cassava and kudzu root can only be used for industrial production due to their low nutritional value. Starch has the advantages of degradability, low price, rich sou...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L51/02C08L59/02C08L69/00C08L67/02C08L33/12C08F251/00C08F220/18C08F220/14C08F212/08
CPCC08F251/00C08L33/12C08L51/02C08L2201/06C08L59/02C08L69/00C08L67/02C08F220/18C08F220/1802C08F220/1804
Inventor 东为富李婷马丕明陈明清
Owner JIANGNAN UNIV
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