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, ca

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

Example Embodiment

[0057] Example 1

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

[0059] The first step is accurately weighted 60 g of lacquer, 1.5 g of three-octylhylammonium chloride and 40 g of epoxy chloropropane, is installed, stirred at 75 ° C for 4 h, cooled to 55 ° C, drip 20 ml The sodium hydroxide solution (C = 7.5 mol / L) was stirred for 4 h, cooled to room temperature. The organic phase was washed with deionized water, and the organic phase was separated by pears, and finally evaporated into the organic phase in the organic phase and epoxy chloride to obtain lacquer glycerol ether;

[0060] In the second step, 60 g of paint phenol glycerol ether was added to the three flask, and 100 ml of chloroform solution containing 40 g of molinene-peroxybenzoic acid was added dropwise, and the temperature was stirred at 35 ° C for 4 h, and washed with saturated sodium hydroxide solution to a neutralized funnel. The glycidyl ether of epoxidized phenol is separated;

[0061] 1600cm in t...

Example Embodiment

[0069] Example 2

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

[0071] The first step is accurately weighted 80 g of painthenol, 3 g of tetrabutylammonium chloride, and 20 g of epoxy chloropropane in the three flasks, which is installed, stirred at 85 ° C for 2 h, cooled to 65 ° C, and 20 ml of hydroxide The sodium solution (C = 7.5 mol / L) was stirred for 2 h, cooled to room temperature. The organic phase was washed with deionized water, and the organic phase was separated by pears, and finally evaporated into the organic phase in the organic phase and epoxy chloride to obtain lacquer glycerol ether;

[0072] In the second step, 80 g of paint phenol glycene was added to a three flask, and 100 ml of chloroform solution containing 20 g of fibro-oxide oxide chloroic acid was added dropwise, and the temperature was stirred at a constant temperature of 2 h. Cycloyl ether;

[0073] The third step weighing 1.7 kg of cassava starch and 0.3 kg of glycerol addition in the Mix...

Example Embodiment

[0080] Example 3

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

[0082] The first step is accurately weighted 70 g of phenol, 2 g of benzyl triethylammonium chloride and 30 g of epoxy chloropropane, is installed, stirred at 80 ° C for 3 h, cooled to 60 ° C, drip 20 ml Sodium hydroxide solution (C = 7.5 mol / L), stirred for 2 h, cooled to room temperature. The organic phase was washed with deionized water, and the organic phase was separated by pears, and finally evaporated into the organic phase in the organic phase and epoxy chloride to obtain lacquer glycerol ether;

[0083] In the second step, 70 g of paint phenol glycerol ether was added to a three flask, and 100 mL containing 30 g of a glynyl oxide chloroformyl chloroform solution was added dropwise, and the temperature was stirred at 40 ° C for 3 h, washed with saturated sodium hydroxide solution to neutralized funnel separation. Glycidyl glycerol ether;

[0084] The third step weighing 1.6kg corn starch and 0.4...

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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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