Bagasse/cassava starch polylactic acid biodegradable material, and preparation method and application thereof

A biodegradable material and tapioca starch technology are applied in the field of sugarcane bagasse tapioca starch polylactic acid biodegradation materials and their preparation, which can solve the problems of low comprehensive utilization rate, low added value, environmental pollution, waste of resources, etc., and solve the problem of raw material supply, The effect of reducing production costs and increasing added value

Active Publication Date: 2014-09-03
GUANGDONG PROVINCIAL BIOENGINEERING INST (GUANGZHOU SUGARCANE IND RES INST)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for a long time, the comprehensive utilization rate and added value of bagasse have been low. Except for some bagasse used as papermaking and man-made boards, it is mainly used as energy fuel by the sugar factory itself to be burned or piled up in large quantities and discarded directly, causing great harm. resource waste and environmental pollution

Method used

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  • Bagasse/cassava starch polylactic acid biodegradable material, and preparation method and application thereof
  • Bagasse/cassava starch polylactic acid biodegradable material, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The bagasse shipped from the sugar factory is firstly depulped twice through a pitting machine with a sieve hole of 7-8mm so that the pith content of the bagasse is less than 5%, and then the bagasse after depulping by the pitting machine is removed Wet storage, after wet storage, the bagasse after wet storage will go through a wet depitting process to make the bagasse content of pith less than 1%, and finally dry and crush to a particle size of 80 mesh to obtain pretreated bagasse ;

[0025] The tapioca starch was dried for 24 hours at 60° C. of an oven, and the dried tapioca starch was added with 1% citric acid, 2% glycerol and 2% acetamide and mixed to obtain a mixed material, citric acid, glycerol and ethyl The purity specification of the amide is chemically pure, and the mixed material is added to a twin-screw extruder at an extrusion temperature of 100°C and a screw speed of 60r / min for extrusion modification to obtain pre-modified tapioca starch;

[0026] The ma...

Embodiment 2

[0030] The bagasse shipped from the sugar factory is firstly depulped twice through a pitting machine with a sieve hole of 7-8mm so that the pith content of the bagasse is less than 5%, and then the bagasse after depulping by the pitting machine is removed Wet storage, after wet storage, the bagasse after wet storage will go through a wet depitting process to make the bagasse content of pith less than 1%, and finally dry and crush to a particle size of 100 mesh to obtain pretreated bagasse ;

[0031] Tapioca starch was dried 18 hours at 80 DEG C of oven, in the tapioca starch after drying, add the citric acid of tapioca starch weight 1.5%, the glycerin of 2.5% and the acetamide of 3% mix to obtain mixed material, citric acid, glycerol and ethyl The purity specification of the amide is chemically pure, and the mixed material is added to a twin-screw extruder at an extrusion temperature of 120°C and a screw speed of 80r / min for extrusion modification to obtain pre-modified tapio...

Embodiment 3

[0036] The bagasse transported from the sugar factory is firstly depulped twice through a pitting machine with a sieve hole of 7-8mm so that the pith content of the bagasse is less than 5%, and then the bagasse after depulping by the pitting machine is removed Wet storage, after wet storage, the bagasse after wet storage will go through a wet depitting process to make the bagasse content less than 1%, and finally dry and crush to a particle size of 150 mesh to obtain pretreated bagasse ;

[0037]The tapioca starch was dried for 12 hours at 80° C. of an oven, and the dried tapioca starch was added with 1% citric acid, 3% glycerol and 3% acetamide and mixed uniformly to obtain a mixed material, citric acid, glycerol and ethyl The purity specification of the amide is chemically pure, and the mixed material is added to a twin-screw extruder at an extrusion temperature of 110°C and a screw speed of 70r / min for extrusion modification to obtain pre-modified tapioca starch;

[0038] ...

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Abstract

The invention belongs to the technical field of biodegradable materials, and discloses a bagasse/cassava starch polylactic acid biodegradable material and a preparation method thereof. The bagasse/cassava starch polylactic acid biodegradable material comprises the following components in percentage by mass: 5-20% of bagasse, 10-40% of cassava starch, 20-60% of polylactic acid, 5-20% of polycaprolactone, 0.5-3% of coupling agent, 0.5-5% of plasticizer, and 1-5% of lubricant and heat stabilizer. The preparation method comprises the following steps: uniformly mixing the components, adding into a double screw extruder, and carrying out extrusion granulation at the extrusion temperature of 80-140 DEG C at the screw speed of 40-100 r/min to obtain the bagasse/cassava starch polylactic acid biodegradable material. The material has favorable biodegradability and mechanical properties, and can be used for preparing daily plastic products.

Description

technical field [0001] The invention belongs to the technical field of biodegradable materials, and in particular relates to a bagasse tapioca starch polylactic acid biodegradable material and a preparation method and application thereof. Background technique [0002] As the total amount of petroleum resources is decreasing, the price is increasing rapidly, and the environmental pollution caused by waste polymer materials is getting worse, biodegradable plastics are getting more and more attention. At present, a variety of biodegradable plastics based on different raw materials have been developed in the world, the main varieties include starch-based biodegradable plastics, polylactic acid (PLA), polybutylene succinate (PBS), polyhydroxyalkanoate (PHA) ), polycaprolactone (PCL), carbon dioxide copolymer aliphatic polycarbonate (APC), aliphatic-aromatic copolyester, etc. Among them, starch-based biodegradable plastics, polylactic acid (PLA), and polybutylene succinate (PBS) ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/04C08L3/04C08L97/02C08K5/10C08K5/103C08K5/098C08B31/00B29C47/92B29C48/92
CPCB29C47/385B29C47/0011B29C47/92B29C48/04B29C48/397B29C48/92B29C2948/92561B29C2948/92704
Inventor 曾建梁磊黄向阳谢晋谋安玉兴
Owner GUANGDONG PROVINCIAL BIOENGINEERING INST (GUANGZHOU SUGARCANE IND RES INST)
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