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Modified corn straw granule enhanced PBAT [poly(butyleneadipate-co-terephthalate)] starch composite material and preparation method thereof

A technology of corn stalks and composite materials, applied in the field of modified corn stalk particles reinforced PBAT starch composite materials and its preparation, can solve the problems of unsatisfactory mechanical properties of composite materials, reduce raw material costs, etc., and achieve easy industrialized large-scale production, The effect of high production efficiency and strong operability

Inactive Publication Date: 2017-01-18
葛袁园
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The Chinese patent application with application number 201210556637.X "a biodegradable TPS / PBAT composite material and its preparation method" and the Chinese patent application with application number 201210553133.2 "preparation method of plastic starch modified PBAT biodegradable material" disclose two A method of filling and blending PBAT with thermoplastic starch, which greatly reduces the cost of raw materials, but the mechanical properties of the composite material are not ideal

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] (1) Preparation of modified corn stalk particles

[0031] a) Weigh an appropriate amount of corn stalk particles over 100 mesh and add it to a sodium hydroxide solution with a concentration of 0.5 wt% (solid-liquid mass ratio is 1:20), and stir for 30 min at a speed of 100 rpm. After the treatment, the corn stalk particles were rinsed and filtered with clean water until neutral, and then placed in a blast drying oven at 90° C. for 12 hours to obtain pretreated corn stalk particles. b) Weigh 100g of dry alkali-pretreated corn stalk particles passed through a 120-mesh sieve and 1000ml of distilled water into a flask with a stirring and reflux device, stir and puff at 85°C for 40 min, then add 5 g of ammonium persulfate to continue Stir for 30 min, cool down to 60°C, then add 20 g of butyl methacrylate, and react at 200 rpm for 1 hour. c) Wash and filter the crude product obtained in step b) with deionized water 5 times, put it in a vacuum drying oven and dry it at 85°C f...

Embodiment 2

[0036] (1) Preparation of modified corn stalk particles

[0037] a) Weigh an appropriate amount of corn stalk particles over 100 mesh and add it to a sodium hydroxide solution with a concentration of 5 wt% (solid-liquid mass ratio is 1:60), and stir for 4 h at a speed of 100 rpm. After the treatment, the corn stalk particles were rinsed and filtered with clean water until neutral, and then placed in a blast drying oven at 90° C. for 12 hours to obtain pretreated corn stalk particles. b) Weigh 200 g of dry alkali-pretreated corn stalk particles passed through a 120-mesh sieve and 2000 ml of distilled water into a flask equipped with a stirring and reflux device, stir and puff at 95°C for 30 min, and then add 20 g of ammonium persulfate Continue to stir for 40 min, then add 100 g of butyl methacrylate after cooling down to 70°C, and react at 250 rpm for 4 hours. c) Wash and filter the crude product obtained in step b) with deionized water 5 times, put it in a vacuum drying oven...

Embodiment 3

[0042] (1) Preparation of modified corn stalk particles

[0043] a) Weigh an appropriate amount of corn stalk particles over 100 mesh and add it to a sodium hydroxide solution with a concentration of 3 wt% (solid-liquid mass ratio is 1:40), and stir for 2.5 h at a speed of 100 rpm. After the treatment, the corn stalk particles were rinsed and filtered with clean water until neutral, and then placed in a blast drying oven at 90° C. for 12 hours to obtain pretreated corn stalk particles. b) Weigh 50 g of dry alkali-pretreated corn stalk particles passed through a 120-mesh sieve and 500 ml of distilled water into a flask equipped with a stirring and reflux device, stir and puff at 90°C for 10 min, and then add 7.5 g of ammonium persulfate Stirring was continued for 20 min, and then 40 g of butyl methacrylate was added after cooling down to 80°C, and the reaction was carried out at 300 rpm for 2.5 hours. c) Wash and filter the crude product obtained in step b) with deionized wate...

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Abstract

The invention discloses a modified corn straw granule enhanced PBAT [poly(butyleneadipate-co-terephthalate)] starch composite material, and a preparation method and application thereof, and belongs to the technical field of biodegradable composite materials. The composite material is prepared from the following components in percentage by weight: 30 to 80 percent of PBAT, 10 to 50 percent of plasticized starch, 10 to 40 parts of modified corn straw granules, 0 to 1 percent of a lubricating agent and 0 to 1 percent of an antioxidant. The modified corn straw granule enhanced PBAT starch composite material provided by the invention is safe and non-toxic, has excellent mechanical performance, can be biologically degraded and can be applied in the fields of cultivation and seed breeding, food packaging, agricultural mulching films and the like. A corn straw granule grafted butyl methacrylate copolymer is prepared firstly and then is filled in a PBAT / starch composite material, so the system is enhanced effectively; furthermore, the modified corn straw granules have higher compatibility with the PBAT and can be dispersed in the system well.

Description

technical field [0001] The invention belongs to the technical field of biodegradable composite materials, in particular to a modified corn stalk particle reinforced PBAT starch composite material and a preparation method and application thereof. Background technique [0002] In recent years, with the depletion of petroleum resources and the enhancement of people's awareness of environmental protection, the development and research of biodegradable composite materials that do not use petroleum as raw materials have attracted more and more attention. PBAT (polybutylene adipate / terephthalate) is a new type of fully biodegradable material produced by BASF. Its trade name is Ecoflex, which has the characteristics of both PBA and PBT. The molecular chain structure of these two components And the interconnection structure makes PBAT have good ductility and elongation at break, and also has good heat resistance and impact performance. However, the current high price of PBAT limits ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L3/02C08L67/02C08L51/00C08K5/053C08F289/00C08F220/18B29C47/92B29C47/60B29C48/92
CPCB29C48/505B29C48/92B29C2948/92704C08F289/00C08L3/02C08L67/02C08L2201/06C08L2205/03C08L51/00C08K5/053C08F220/1804
Inventor 葛袁园
Owner 葛袁园
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