Modified bagasse strengthening PBAT/starch complete biodegradation composite material and preparing method and application thereof

A composite material and biodegradable technology, applied in the field of modified bagasse-reinforced PBAT/starch complete biodegradable composite material and its preparation, can solve the problems of low utilization rate, environmental pollution, low added value of bagasse, etc., and achieve high production efficiency, The effect of strong operability and low production cost

Inactive Publication Date: 2017-02-22
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the use of bagasse has always had problems such as low added value, low utilization rate, and environmental pollution, and using bagasse to fill or enhance biodegradable composite materials is an effective way to increase its added value
The use of modified bagasse to strengthen PBAT / starch composites can further reduce the cost of raw materials while improving the mechanical properties of the composites, but there are few reports on this aspect.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] (1) Preparation of modified bagasse

[0037] a) Weigh an appropriate amount of bagasse over 100 mesh and add it to a sodium hydroxide solution with a concentration of 0.5 wt% (the mass ratio of solid to liquid is 1:20), and stir for 30 min at a speed of 100 rpm. After the treatment, rinse and filter the bagasse with clean water until it becomes neutral, and then place it in a blast drying oven at 90° C. for 12 hours to obtain pretreated bagasse.

[0038] b) Weigh 100 g of dry alkali-pretreated bagasse and 1000 ml of distilled water passed through a 120-mesh sieve into a flask with a stirring and reflux device, stir and expand at 85°C for 40 min, then add 5 g of ammonium persulfate to continue Stir for 30 minutes, cool down to 60° C., then add 20 g of butyl methacrylate, and react at 200 rpm for 1 hour.

[0039] c) The crude product obtained in step b) was washed and filtered 5 times with deionized water, put into a vacuum drying oven and dried at 85° C. for 8 hours to ...

Embodiment 2

[0045] (1) Preparation of modified bagasse

[0046] a) Weigh an appropriate amount of bagasse over 100 mesh and add it to a sodium hydroxide solution with a concentration of 5 wt% (the mass ratio of solid to liquid is 1:60), and stir for 4 h at a speed of 100 rpm. After the treatment, rinse and filter the bagasse with clean water until it becomes neutral, and then place it in a blast drying oven at 90° C. for 12 hours to obtain pretreated bagasse.

[0047] b) Weigh 200 g of dry alkali-pretreated bagasse passing through a 120-mesh sieve and 2000 ml of distilled water into a flask equipped with a stirring and reflux device, stir and expand at 95°C for 30 min, then add 20 g of ammonium persulfate to continue Stir for 40 minutes, cool down to 70°C, then add 100 g of butyl methacrylate, and react at 250 rpm for 4 hours.

[0048] c) The crude product obtained in step b) was washed and filtered 5 times with deionized water, put into a vacuum drying oven and dried at 85° C. for 8 hou...

Embodiment 3

[0054] (1) Preparation of modified bagasse

[0055] a) Weigh an appropriate amount of bagasse over 100 mesh and add it to a sodium hydroxide solution with a concentration of 3 wt% (the mass ratio of solid to liquid is 1:40), and stir for 2.5 h at a speed of 100 rpm. After the treatment, rinse and filter the bagasse with clean water until it becomes neutral, and then place it in a blast drying oven at 90° C. for 12 hours to obtain pretreated bagasse.

[0056] b) Weigh 50 g of dry alkali-pretreated bagasse and 500 ml of distilled water passed through a 120-mesh sieve into a flask equipped with a stirring and reflux device, stir and expand at 90°C for 10 min, then add 7.5 g of ammonium persulfate to continue Stir for 20 minutes, cool down to 80°C, then add 40 g of butyl methacrylate, and react at 300 rpm for 2.5 hours.

[0057] c) The crude product obtained in step b) was washed and filtered 5 times with deionized water, put into a vacuum drying oven and dried at 85° C. for 8 ho...

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Abstract

The invention discloses a modified bagasse strengthening PBAT / starch complete biodegradation composite material and a preparing method and an application thereof, and belongs to the technical field of biodegradation composite material. The composite material is prepared from, by weight, 30-80% of poly(butyleneadipate-co-terephthalate)(PBAT), 10-50% of plastics starch, 10-40% of modified bagasse, 0-1% of lubricating agent and 0-1% of antioxygen. The modified bagasse strengthening PBAT / starch complete biodegradation composite material is safe and non-toxic, has an excellent mechanical property, can achieve biodegradation, and can be applied to the field of cultivating and breeding, food packaging, agricultural plastic mulching film and the like. According to the preparing method, bagasse stem grafting butyl methacrylate copolymer is firstly prepared, then the bagasse stem grafting butyl methacrylate copolymer is filled in the PBAT / starch composite material, thus the system is strengthened effectively, and the modified bagase and PBAT have better consistency and are more easily dispersed in the system.

Description

technical field [0001] The invention belongs to the technical field of biodegradable composite materials, in particular to a modified bagasse reinforced PBAT / starch complete biodegradable composite material and its preparation method and application. 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. [0003] However, the current high price o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/02C08L3/02C08L51/00C08F289/00C08F220/18
CPCC08F289/00C08L3/02C08L67/02C08L2201/06C08L2203/16C08L2205/035C08L51/00C08F220/1804
Inventor 贾志欣沈华艳谢东陈明周罗远芳
Owner SOUTH CHINA UNIV OF TECH
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