Unlock instant, AI-driven research and patent intelligence for your innovation.

A kind of starch-based biodegradable composite material and preparation method thereof

A technology of biodegradable and composite materials, applied in the field of starch-based biodegradable composite materials and its preparation, can solve the problems of low mechanical strength, easy moisture absorption, loss of mechanical properties, etc., achieve good hydrophobicity, good water resistance, enhanced The effect of mechanical properties

Active Publication Date: 2017-05-10
上海耐特复合材料制品有限公司 +1
View PDF23 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Chinese patent CN1039648C describes a partially biodegradable polymer composition containing a starch component and a synthetic thermoplastic polymer component (a polymer of carboxylic acid or a mixture of this polymer and a polymer obtained from an olefinically unsaturated monomer) , but the composition will lose mechanical properties due to moisture absorption during storage
The Chinese patent CN1202165C of the U.S. Hematerol company describes adding high molecular weight polymers that are basically compatible with starch in the composition, including polyacrylic acid, polyvinyl alcohol, water-soluble cellulose derivatives, etc., to improve starch and polymer Compatibility between them, so that the starch composition can reach the required extensional viscosity, which is convenient for processing in traditional thermoplastic equipment, but the mechanical strength of the obtained product is not high

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A kind of starch-based biodegradable composite material and preparation method thereof
  • A kind of starch-based biodegradable composite material and preparation method thereof
  • A kind of starch-based biodegradable composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0041] The preparation method of modified bacterial cellulose fiber is as follows:

[0042] Add acetic anhydride and ethylene glycol into the blender at a molar ratio of 1:1, and heat and stir for 100 minutes at a temperature of 100°C. After the two substances are compatible, add 5% of the total mass of acetic anhydride and ethylene glycol catalyst (p-toluenesulfonic acid), then heat to the reaction temperature of 100 ℃ to react, the reaction time is 100 minutes, and finally obtain The carboxyl group is a pale yellow clear liquid product. Cut the bacterial cellulose fiber into small pieces, add sodium hydroxide solution with a concentration of 10% by mass, swell for 60 minutes at a temperature of 50 ℃, and then repeatedly wash with water and then dry, and then mix with the aforementioned light yellow clear liquid product Mix and add a small amount of concentrated sulfuric acid, and perform a reaction for 100 minutes with mechanical stirring under the conditions of a pH value of ...

Embodiment 1

[0046] The starch-based biodegradable composite material was prepared in the formula ratio described in Table 1 below. First, after the corn starch is treated with a 900W high power microwave for 30 seconds, the microwave-modified corn starch, glycerin and water are mixed to form a starch suspension, and then the starch suspension is placed in a mechanical mixer for dispersion for 1 hour. Add the water-dispersed unmodified bacterial cellulose fiber to the starch suspension, then place it in a mechanical mixer and stir for 30 minutes at a temperature of 80°C, take it out and put it in a blast drying box and dehydrate at 80°C for 24 hours, then add it Titanium dioxide is extruded, granulated and injection molded to obtain finished products. After testing, the tensile strength of the injection molded sample can reach 10.6MPa.

Embodiment 2

[0048] Except that the addition amount of the unmodified bacterial cellulose fiber is different, other conditions are the same as in Example 1.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
lengthaaaaaaaaaa
diameteraaaaaaaaaa
modulusaaaaaaaaaa
Login to View More

Abstract

The invention discloses a starch-based biodegradable composite material and a preparation method thereof. The preparation method comprises the following steps: treating starch with microwave; mixing the starch treated with microwave with a plasticizer and a pre-plasticizing dispersant in a mass ratio of 1: (0.1-0.5): (2-6), and performing mechanical dispersion to obtain a mixture A; mixing a blending material containing an enhancer and a pre-plasticizing dispersant in a mass ratio of (0.01-1): (5-30) with the mixture A to obtain a mixture B, wherein the enhancer is unmodified bacterial cellulose fiber and / or modified bacterial cellulose fiber, and the mass ratio of the enhancer to the starch is (0.01: 100)-(0.2: 100); and heating and stirring the mixture B, drying to remove water, extruding and granulating, thus obtaining the composite material. The starch-based biodegradable composite material has relatively high mechanical strength and good water resistance.

Description

Technical field [0001] The invention relates to the field of polymer materials, in particular to a starch-based biodegradable composite material and a preparation method thereof. Background technique [0002] Although traditional plastics have abundant sources, their products have stable physical properties, are hygienic and have good processability, and are widely used in various fields of the national economy and people’s lives. However, with the depletion of petroleum resources and the global “white pollution” With increasing attention, developed countries have begun to develop biodegradable plastics using natural raw materials. Natural raw materials are generally completely decomposed by natural organisms, and their products will not cause pollution. In addition, natural raw materials can be recycled, so the trend of using natural raw materials to make biodegradable plastics is in the ascendant. [0003] Starch has a wide range of sources, is low in price, can be recycled and ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C08L3/02C08L1/02C08L1/08C08L29/04C08L67/04C08K5/053C08K3/22C08J3/28
Inventor 陈勋森叶正涛
Owner 上海耐特复合材料制品有限公司