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Bamboo powder filling biodegradable compound material and preparation method thereof

A composite material and biological technology, applied in the field of composite materials and its preparation, can solve the problems of high efficiency and continuous production of composite materials, and achieve the effects of low preparation cost, high production efficiency, improved appearance and

Active Publication Date: 2011-01-12
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above documents are all processed by an internal mixer, and it is difficult to achieve high-efficiency and continuous production of composite materials

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037]Take by weight 80 parts of polylactic acid (PLA), 20 parts of bamboo powder, 1 part of polyethylene glycol (PEG), 0.6 part of silane coupling agent (KH-550), 10 parts of starch, and 1 part of sorbitol, Wherein: the weight-average molecular weight of PLA is 160,000, and the molar content of L optical isomer is 98%. Vacuum drying at 80°C for 12 hours makes the moisture content 1%, and the average diameter of bamboo powder is 80% by microscopy. Micron, the average length is 0.1 mm according to the microscope method, and it is classified into 200 mesh through a mesh sieve, and it is vacuum-dried at 110 ° C for 12 hours to make the moisture content 2%. Mix the above materials in a high-speed mixer at a speed of 1500 rpm for 6 minutes, then inject them into a twin-screw extruder, and carry out melt blending and granulation under the conditions of a die head temperature of 178°C and a screw speed of 100 rpm , and then the blended pellets were injection-molded in an injection mo...

Embodiment 2

[0039] Weigh 60 parts of polylactic acid (PLA), 40 parts of bamboo powder, 8 parts of polyethylene wax, 1.5 parts of titanate coupling agent (NDZ-101), 5 parts of silicon dioxide, and 1 part of sodium benzoate in parts by mass. Wherein: the weight-average molecular weight of PLA is 110,000, and the molar content of L optical isomer is 86%. Vacuum drying at 80°C for 6 hours makes the moisture mass content 2%, and the average diameter of bamboo powder is 370 by microscopy. Micron, the average length is 2.4 mm according to the microscope method, and it is classified into 40 mesh through a mesh sieve, and it is vacuum-dried at 120 ° C for 12 hours to make the moisture content 1%. Mix the above materials in a high-speed mixer at a speed of 1500 rpm for 8 minutes, then inject them into a twin-screw extruder, and carry out melt blending and granulation under the conditions of a die head temperature of 178°C and a screw speed of 100 rpm , and then the blended pellets were injection-mo...

Embodiment 3

[0041] Weigh 40 parts of polylactic acid (PLA), 60 parts of bamboo powder, 10 parts of dioctyl terephthalate (DOTP), 0.8 part of isocyanate (MDI), 0.05 part of stannous octoate, 3 parts of kaolin, lactic acid 1 part of calcium, wherein: the weight-average molecular weight of PLA is 60,000, and the molar content of L optical isomer is 42%. Vacuum drying at 80°C for 24 hours makes the moisture content 0.5%, and the bamboo powder is made of 40 mesh bamboo powder. Composed of 80-mesh bamboo powder in a mass ratio of 1:1, the average diameter of 40-mesh bamboo powder is 370 microns by microscopy, the average length is 2.4 mm by microscope, and the average diameter of 80-mesh bamboo powder is by microscope It is 180 microns, and the average length is 0.5 millimeter according to the microscope method statistics, and two kinds of bamboo powders are vacuum-dried at 110 ℃ for 12 hours to make the moisture mass content be 1.8%. Mix the above materials in a high-speed mixer at a speed of ...

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Abstract

The invention relates to a bamboo powder filling biodegradable compound material and a preparation method thereof. The bamboo powder filling biodegradable compound material comprises the following raw materials in part by mass: 30 to 80 parts of biodegradable resin, 20 to 70 parts of bamboo powder, 1 to 19 parts of plasticizer, 0.6 to 6 parts of interface modifier and 4 to 12 parts of aids. The preparation method comprises the following steps of: uniformly mixing the biodegradable resin, bamboo powder, plasticizer, interface modifier and auxiliary agent by using a mixer according to formula proportion; performing melt blending and granulation of the obtained mixture by using a screw extruder to obtain particles; and processing the particles by using an injection molding machine, a sheet extrusion forming machine, a blow molding machine or a film blowing machine, and molding in molds of different shapes to obtain the bamboo powder filling biodegradable compound materials of different shapes. The method has the advantages of high production efficiency and low cost; and the powder filling biodegradable compound material prepared by the method has the advantages of high environmentally-friendly property and economy and excellent usability.

Description

technical field [0001] The invention belongs to the field of polymer materials, and in particular relates to a composite material with bamboo powder and biodegradable resin as main raw materials and a preparation method thereof. Background technique [0002] Biodegradable resins can replace petroleum-based polymers and other polymer materials that are not conducive to the environment, and are conducive to protecting the environment, saving energy, and achieving sustainable development. Currently commercialized biodegradable resins mainly include polylactic acid (PLA), polyhydroxybutyrate (PHB), polyhydroxybutyrate-valerate (PHBV), 3-hydroxybutyric acid / 4-hydroxybutyric acid copolymer [P(3HB-co-4HB)], polybutylene succinate (PBS), aliphatic aromatic copolyester (PBAT), carbon dioxide copolymer (PPC), etc. In recent years, biodegradable resins have developed rapidly, but they have also exposed problems such as high cost, poor mechanical properties and heat resistance. One of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/04C08L67/02C08L67/00C08L69/00C08L97/02
Inventor 陈鹏逯柳顾群李琴
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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