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Polyhydroxyalkanoate composite material and preparation method thereof

A polyhydroxyalkanoate and composite material technology, applied in the field of polymer materials, can solve the problems of lack of elasticity of composite materials, deterioration of composite material properties, easy occurrence of agglomeration, etc., and achieves simple preparation method, improved elasticity and strength, and low cost. degradable effect

Active Publication Date: 2015-12-09
上海英华辰睿新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, on the one hand, due to factors such as strong hydrophilicity of starch, strong intramolecular and intermolecular hydrogen bonds, and high molecular weight, it has poor compatibility with PHA, and it is prone to agglomeration during the blending process, resulting in The properties of the composite material deteriorate; on the other hand, the composite material after simple blending of PHA / starch lacks elasticity

Method used

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  • Polyhydroxyalkanoate composite material and preparation method thereof
  • Polyhydroxyalkanoate composite material and preparation method thereof
  • Polyhydroxyalkanoate composite material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0022] 50kg of ethylene-vinyl acetate copolymer, 50kg of gelatinized potato starch, 10kg of glycerol, 1kg of maleic anhydride and 0.1kg of dibenzoyl peroxide were uniformly premixed with vinyl acetate mass percentage content of 50%, Reactive blending extrusion granulation was carried out through a twin-screw extruder at 135° C. to obtain a granulated blend, wherein the rotational speed of the screws was 50 rpm.

[0023] 100 kg of 3-hydroxybutyrate-3-hydroxyhexanoate copolymer (3-hydroxyhexanoate molar content is 11%) and the granulated blend are blended and extruded through a twin-screw extruder at 150°C Pelletize to obtain a polyhydroxyalkanoate composite material, wherein the screw speed is 120 rpm.

[0024] Put the polyhydroxyalkanoate composite material into the mold, and first hot-press on a flat vulcanizer (hot-press temperature 160°C, hot-press time 3min, hot-press pressure 10MPa), and then cold-press (cold-press time 10min, cold-press Pressure 10MPa), made into a shee...

Embodiment 2

[0026] Butylene terephthalate mass percentage content is 40% butylene adipate-butylene terephthalate copolymer 70kg, thermoplastic tapioca starch 40kg, glycerol 15kg, maleic anhydride 1.5 kg and 0.15 kg of dicumyl peroxide were premixed evenly, and reactively blended and extruded to obtain granulated blends in a screw extruder, wherein the screw speed was 60 rpm, and the blending temperature was 165°C.

[0027] 110kg of 3-hydroxybutyrate-4-hydroxybutyrate copolymer (4-hydroxyhexanoate molar content is 28%) and the granulated blend were blended and extruded through a twin-screw extruder at 155°C Pelletize to obtain a polyhydroxyalkanoate composite material, wherein the screw speed is 110 rpm.

[0028] Put the polyhydroxyalkanoate composite material into the mold, and first hot-press on a flat vulcanizer (hot-press temperature 160°C, hot-press time 3min, hot-press pressure 10MPa), and then cold-press (cold-press time 10min, cold-press Pressure 10MPa), made into a sheet with a t...

Embodiment 3

[0030] Butylene adipate mass percentage composition is 50% butylene succinate-butylene adipate copolymer 75kg, potato starch 45kg, ethylene glycol 13kg, itaconic anhydride 1kg and over After 0.08 kg of tert-butyl oxidized benzoate was premixed uniformly, reactive blending and extrusion granulation was carried out by a twin-screw extruder at 160° C. to obtain a granulated blend, wherein the screw speed was 70 rpm.

[0031] 108kg of 3-hydroxybutyrate-4-hydroxybutyrate copolymer (4-hydroxybutyrate molar content is 20%) and the granulated blend were blended and extruded through a twin-screw extruder at 160°C Pelletize to obtain a polyhydroxyalkanoate composite material, wherein the screw speed is 105 rpm.

[0032] Put the polyhydroxyalkanoate composite material into the mold, and first hot-press on a flat vulcanizer (hot-press temperature 160°C, hot-press time 3min, hot-press pressure 10MPa), and then cold-press (cold-press time 10min, cold-press Pressure 10MPa), made into a shee...

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Abstract

The invention discloses a polyhydroxyalkanoate composite material and a preparation method thereof. The polyhydroxyalkanoate composite material is composed of the following raw materials in parts by weight: 90-120 parts of polyhydroxyalkanoate, 10-80 parts of starch, 1-25 parts of alcohol plasticizer, 20-100 parts of ester copolymer, 0.1-5 parts of anhydride and 0.01-2 parts of radical initiator. The polyhydroxyalkanoate composite material obtained by the preparation method provided by the invention is capable of remarkably improving the elasticity and strength of the PHA composite material and thinning the phase morphology of the PHA composite material. The composite material has the advantages of small starch particle size, good material elasticity, low cost biodegradability and the like; and the preparation method of the composite material is simple and easy to realize industrialization.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to a polyhydroxyalkanoate composite material and a preparation method thereof. Background technique [0002] The extensive use and disposal of traditional polymer materials not only causes the increasing shortage of petroleum resources, but also causes serious damage to the ecological environment. Polyhydroxyalkanoate (PHA) is considered to be one of the most promising and competitive materials in the bioplastic family, which can be directly produced by microbial fermentation and can be completely degraded into CO under composting conditions. 2 and H 2 O, will not pollute the environment. With the increase of comonomer content, the crystallinity of PHA becomes worse and the elasticity improves. However, the high cost of PHA (3-4 times the price of PE), high brittleness, and easy adhesion to equipment during processing restrict its application and development in the fiel...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L67/04C08L3/02C08L67/02C08L23/08C08K5/053C08K5/1539B29B9/06B29C47/92B29C48/92
CPCB29C48/385B29C48/92B29C2948/9259B29C2948/92704B29C2948/92885B29C2948/92895
Inventor 马丕明蔡晓霞陈明清东为富
Owner 上海英华辰睿新材料有限公司
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