Biodegradable polylactic acid-starch flame retardant composite material and preparation method thereof

A flame-retardant composite material and flame-retardant composite technology, applied in the field of polymer materials, can solve the problems of high price and high brittleness of polylactic acid, achieve good mechanical properties, improve compatibility, and improve material performance

Active Publication Date: 2012-07-25
CHINA UNIV OF GEOSCIENCES (WUHAN) +1
View PDF1 Cites 27 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the price of polylactic acid is high and brittle, and other raw materia

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
  • Biodegradable polylactic acid-starch flame retardant composite material and preparation method thereof
  • Biodegradable polylactic acid-starch flame retardant composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041]Put 96.5 parts of starch (corn starch) into a high-speed mixer after drying, add 2 parts of maleic anhydride and 0.5 part of benzoyl peroxide to carry out grafting reaction at 70 ° C for 30 minutes, and obtain grafted branched starch; then add 1 part of stearic acid to the grafted starch for surface modification at 60° C. for 30 minutes to obtain grafted modified starch.

[0042] The preparation process of the biodegradable polylactic acid-starch flame-retardant composite material is as follows: 60 parts of polylactic acid, 25 parts of modified starch, 10 parts of ammonium polyphosphate, 4 parts of polyethylene glycol 6000, 0.25 parts of antioxidant 1010, 0.25 168 parts of antioxidant, 0.5 part of zinc stannate are put into a high-speed mixer, mixed for 5 minutes at room temperature and taken out; the above-mentioned homogeneously mixed blend is melted and extruded by a twin-screw extruder, cooled, granulated, and The obtained polylactic acid-starch flame-retardant compo...

Embodiment 2

[0045] In parts by mass, put 95 parts of starch (sweet potato starch) into a high-speed mixer after drying, add 2.5 parts of maleic anhydride and 0.5 parts of benzoyl peroxide to carry out grafting reaction at 70 °C for 30 minutes to obtain grafted starch; then add 2 parts of stearic acid to the grafted starch for surface modification at 60° C. for 30 minutes to obtain grafted modified starch.

[0046] The preparation process of the biodegradable polylactic acid-starch flame-retardant composite material is as follows: 53 parts of polylactic acid, 30 parts of modified starch, 12 parts of melamine phosphate, 4 parts of polyethylene glycol 6000, 0.25 parts of antioxidant 1010, 0.25 168 parts of antioxidant and 0.5 part of 4A molecular sieves were put into a high-speed mixer, mixed for 7 minutes at room temperature and taken out; the above-mentioned homogeneously mixed blend was melted and extruded through a twin-screw extruder, cooled and granulated, and obtained The polylactic a...

Embodiment 3

[0049] In parts by mass, put 94 parts of starch (wheat starch) into a high-speed mixer after drying, add 2.5 parts of maleic anhydride and 0.5 parts of benzoyl peroxide to carry out grafting reaction at 70°C for 30 minutes to obtain grafted starch; then add 3 parts of stearic acid to the grafted starch for surface modification at 60° C. for 30 minutes to obtain grafted modified starch.

[0050] The preparation process of the biodegradable polylactic acid-starch flame-retardant composite material is as follows: 50 parts of polylactic acid, 32.5 parts of modified starch, 11.5 parts of ammonium polyphosphate, 4.5 parts of polyethylene glycol 6000, 0.5 parts of antioxidant 1010, 0.5 168 parts of antioxidant and 0.5 part of zinc borate were put into a high-speed mixer, mixed for 8 minutes at room temperature and taken out; the above-mentioned homogeneously mixed blend was melted and extruded through a twin-screw extruder, cooled and granulated, and obtained The polylactic acid-star...

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

No PUM Login to view more

Abstract

The invention relates to a biodegradable polylactic acid-starch flame retardant composite material and a preparation method of the composite material. The composite material comprises the following components in parts by weight: 40-60 of polylactic acid, 25-40 of modified starch, 10-13 of a flame retardant, 0.5-1 of an antioxidant, 4-5 of a plasticizer, and 0.5-1 of a flame retardant synergist. The preparation method is as follows: mixing the raw materials in a high-speed mixer for 5-10min according to the formula; then extruding and pelleting by a double screw extruder, wherein the extrusion temperature is 135-155 DEG C and the screw rotation speed is 200-300r/min; and performing injection molding on the dried polylactic acid-starch flame retardant aggregates by a injection molding machine to obtain the biodegradable polylactic acid-starch flame retardant composite material. According to the invention, the prepared biodegradable polylactic acid-starch flame retardant composite material is good in biodegradability, and improves the compatibility of polylactic acid and starch, and in addition, by addition of a proper amount of flame retardant according to chemical composition of the material, the prepared composite material has biodegradability and flame retardant property at the same time.

Description

technical field [0001] The invention belongs to the field of polymer materials, and in particular relates to a biodegradable flame-retardant composite material and a preparation method thereof. Background technique [0002] While plastic products bring convenience to people, they also cause great harm to the living environment of human beings. Ordinary plastics are not easy to degrade and have excellent chemical stability. They exist in nature for a long time, making plastic waste increasing day by day, causing "white pollution" and becoming a major obstacle to environmental protection. Plastic waste not only affects the beauty of the environment, but also pollutes water sources and soil, endangers the health of humans, animals and plants, and brings a heavy burden to the earth's ecological environment. Therefore, the problem of plastic waste pollution has received widespread attention around the world, and laws and regulations have been introduced to restrict the use and r...

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
IPC IPC(8): C08L67/04C08L51/02C08L71/08C08K3/32C08K5/3492C08F251/00B29C47/92B29C48/92
CPCB29C48/04B29C48/40B29C48/92B29C2948/9259B29C2948/92704B29C2948/92885B29C2948/92895
Inventor 胡珊张俊高虎亮黄裕杰申应军
Owner CHINA UNIV OF GEOSCIENCES (WUHAN)
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap