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Anti-precipitation and low-haze starch-based fully biodegradable PBAT alloy and preparation method thereof

A low-haze, starch-based technology, applied in the field of starch-based fully biodegradable PBAT alloy and its preparation, can solve the problems of shortened shelf life, reduced product performance, product stickiness, etc. The effect of linking degree and avoiding degradation

Active Publication Date: 2022-01-21
WANHUA CHEMICAL (NINGBO) CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The small molecule alcohol plasticizers such as glycerin in this film are easy to precipitate on the surface during the use and storage of the product, causing the product to be sticky and shorten the shelf life, and the acid plasticizer will cause PBAT, etc. Resin degradation, reducing product performance

Method used

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  • Anti-precipitation and low-haze starch-based fully biodegradable PBAT alloy and preparation method thereof
  • Anti-precipitation and low-haze starch-based fully biodegradable PBAT alloy and preparation method thereof
  • Anti-precipitation and low-haze starch-based fully biodegradable PBAT alloy and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] (1) Preparation of modified starch (M-starch A):

[0059] The first step is to accurately weigh 60g urushiol, 1.5g trioctylmethyl ammonium chloride and 40g epichlorohydrin in a three-necked flask, install them, stir at 75°C for 4h, cool to 55°C, and add 20ml dropwise Sodium hydroxide solution (C=7.5mol / L), stirred for 4h, cooled to room temperature. Wash with deionized water until neutral, separate the organic phase with a pear-shaped separatory funnel, and finally decompress and rotary evaporate the water and epichlorohydrin in the organic phase to obtain urushiol glycidyl ether;

[0060] In the second step, add 60g of urushiol glycidyl ether into a three-necked flask, dropwise add 100ml of chloroform solution containing 40g of m-chloroperoxybenzoic acid, stir at 35°C for 4h, wash with saturated sodium hydroxide solution until neutral, and pass through a separatory funnel Isolate and obtain epoxidized urushiol glycidyl ether;

[0061] 1600cm in infrared analysis -1 ...

Embodiment 2

[0070] (1) Preparation of modified starch (M-starch B):

[0071] The first step is to accurately weigh 80g of urushiol, 3g of tetrabutylammonium chloride and 20g of epichlorohydrin in a three-necked flask, install them, stir at 85°C for 2h, cool to 65°C, and drop 20ml of hydroxide Sodium solution (C=7.5mol / L), stirred for 2h, cooled to room temperature. Wash with deionized water until neutral, separate the organic phase with a pear-shaped separatory funnel, and finally decompress and rotary evaporate the water and epichlorohydrin in the organic phase to obtain urushiol glycidyl ether;

[0072] In the second step, add 80g of urushiol glycidyl ether into a three-necked flask, dropwise add 100ml of chloroform solution containing 20g of benzoic acid peroxide, stir at a constant temperature of 65°C for 2h, wash with saturated sodium hydroxide solution until neutral, and separate through a separatory funnel to obtain Epoxy urushiol glycidyl ether;

[0073] In the third step, weigh...

Embodiment 3

[0081] (1) Preparation of modified starch (M-starch C):

[0082] The first step is to accurately weigh 70g urushiol, 2g benzyltriethylammonium chloride and 30g epichlorohydrin in a three-necked flask, install them, stir at 80°C for 3h, cool to 60°C, and drop 20ml of Sodium hydroxide solution (C=7.5mol / L), stirred for 2h, cooled to room temperature. Wash with deionized water until neutral, separate the organic phase with a pear-shaped separatory funnel, and finally decompress and rotary evaporate the water and epichlorohydrin in the organic phase to obtain urushiol glycidyl ether;

[0083] In the second step, add 70g of urushiol glycidyl ether into a three-necked flask, dropwise add 100ml of chloroform solution containing 30g of benzoyl peroxide, stir at a constant temperature of 40°C for 3h, wash with saturated sodium hydroxide solution until neutral, and separate through a separatory funnel Obtain epoxy urushiol glycidyl ether;

[0084] In the third step, weigh 1.6 kg of co...

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Abstract

The invention discloses an anti-precipitation and low-haze starch-based fully biodegradable PBAT alloy and a preparation method thereof. The PBAT alloy is prepared from the following components: PBAT resin, PLA resin, modified starch and a lubricant. The modified starch is glycerol and epoxidized urushiol glycidyl ether modified starch, the molecular weight and crystallinity are low, blow molding film forming is performed after the modified starch is doped into the PBAT alloy, the transparency of the film can be improved, and the epoxidized urushiol glycidyl ether with multiple epoxy groups can improve the crosslinking degree of the material, so the tear resistance and dart falling impact resistance of the film are improved.

Description

technical field [0001] The invention belongs to the field of degradable plastics, and in particular relates to a starch-based fully biodegradable PBAT alloy with anti-separation and low haze and a preparation method thereof. Background technique [0002] Traditional plastics are widely used in various fields because of their excellent comprehensive performance, good processability and low cost, such as polyethylene (PE), polypropylene (PP) and polystyrene (PS) and other plastics have been developed and used The amount is increasing year by year, but their structure determines that they can exist stably in nature for a long time, resulting in a large amount of white pollution. Even if they can be broken by photo-oxygen degradation, there will still be microplastics smaller than 0.5nm, which will even affect our ecology. The system is seriously polluted. Fully biodegradable plastics can degrade quickly in the natural environment, and finally all become CO 2 and organic matte...

Claims

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Application Information

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IPC IPC(8): C08L67/02C08L67/04C08L3/04C08J5/18
CPCC08L67/02C08J5/18C08J2367/02C08J2467/04C08J2403/04C08L2203/16C08L2201/06C08L2201/10C08L67/04C08L3/04Y02W90/10
Inventor 黄建陈连清祁先勇李保印吴俊邵成立詹佐民李熠宇王倩倩欧阳洋子何亚洲
Owner WANHUA CHEMICAL (NINGBO) CO LTD
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