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Halogen-free flame-retardant biodegradable composite material as well as preparation method and application thereof

A composite material and biodegradable technology, which is applied in the field of halogen-free flame-retardant biodegradable composite materials and their preparation, can solve the problems of unstable organic peroxide initiators, less research on flame-retardant properties, and potential safety hazards, and achieve Good thermal stability and flame retardant performance, low price, easy processing effect

Inactive Publication Date: 2016-12-14
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the organic peroxide initiator used in the synthesis process of the composite material is unstable after being heated, and is easy to decompose, which has certain potential safety hazards
[0005] The natural polymer flame retardants currently reported are generally used as synergists and other flame retardants to make degradable plastics have good flame retardancy, and the natural polymers are used alone after flame retardant modification. There are fewer documents and patents in degradable plastics
In addition, there are many studies on the biodegradable flame retardant materials of two kinds of polysaccharide natural polymers, starch and natural fibers, and chitosan is functionally modified and added to degradable plastics to improve the flame retardant properties of materials. less research

Method used

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  • Halogen-free flame-retardant biodegradable composite material as well as preparation method and application thereof
  • Halogen-free flame-retardant biodegradable composite material as well as preparation method and application thereof
  • Halogen-free flame-retardant biodegradable composite material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Add polylactic acid (PLA) and functionalized chitosan (PCS-Co) to an internal mixer at a temperature of 180°C and a rotor speed of 45r / min according to the following mass ratio and mix for 8 minutes, and mix well to obtain blue shades Cured products with different degrees, that is, halogen-free flame-retardant biodegradable composite materials. The specific mass between functionalized chitosan and polylactic acid is shown in Table 1.

[0033] Wherein, the specific preparation steps of PCS-Co are as follows:

[0034] (1) Preparation of phosphated chitosan: Dissolve 4g of chitosan in 60ml of methanesulfonic acid, add 20g of phosphorus pentoxide after complete dissolution, react under nitrogen protection, and control it in an ice-water bath at 0°C for 3 Hour. The product after the reaction was washed with ether, acetone, and methanol respectively, and a white powder was obtained after suction filtration in a suction filtration machine. Then, put the white powder into a ...

Embodiment 2

[0039] Add polylactic acid (PLA) and functionalized chitosan (PCS-Fe) with a specific mass ratio (specific mass such as Example 1) to a banbury mixer with a temperature of 180°C and a rotor speed of 40r / min for 10min , to obtain a cured product after mixing evenly, that is, a halogen-free flame-retardant biodegradable composite material.

[0040] Wherein, the specific preparation steps of PCS-Fe are as follows:

[0041] (1) Preparation of phosphated chitosan: Dissolve 4g of chitosan in 60ml of methanesulfonic acid, add 36g of phosphorus pentoxide after complete dissolution, react under nitrogen protection, and control it in an ice-water bath at 5°C for 8 Hour. The product after the reaction was washed with ether, acetone, and methanol respectively, and a white powder was obtained after suction filtration in a suction filtration machine. Then, put the white powder into a vacuum drying oven and dry for 24 hours to obtain the intermediate product phosphorylated chitosan.

[00...

Embodiment 3

[0044] Polybutylene succinate ( PBS) and functionalized chitosan (PCS-Co, specific preparation steps such as embodiment 1) are joined in the internal mixer that temperature is 120 ℃, rotor speed is 45r / min banburying 8min, after mixing uniformly, obtain cured product, That is, halogen-free flame-retardant biodegradable composite materials.

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Abstract

The invention discloses a halogen-free flame-retardant biodegradable composite material as well as a preparation method and application thereof. The halogen-free flame-retardant biodegradable composite material is prepared by the following steps: using a biodegradable high-molecular compound as a matrix; using a functionalized chitosan as a flame retardant, wherein the functionalized chitosan is a biomass flame retardant which integrates flame retardancy and metal synergistic effect and is synthesized from chitosan, diphosphorus pentoxide, metal salt and other raw materials through chemical action; and uniformly mixing the matrix with the flame retardant through an internal mixer, wherein a mass ratio of the high-molecular compound to the flame retardant is 100:(0.8-4.0). The halogen-free flame-retardant biodegradable composite material prepared by the invention has good thermal stability and flame-retardant property, and can be widely used in the fields of industrial packaging materials, disposable articles, sanitary articles, laminated materials and the like.

Description

technical field [0001] The invention belongs to the technical field of composite materials, and in particular relates to a halogen-free flame-retardant biodegradable composite material and a preparation method and application thereof. Background technique [0002] Since the 20th century, plastic products have been widely used in many occasions because of their cheapness, light weight, convenient processing, and stable properties. They have become the main substitutes for metal, cement, ceramics, and wood, and have become indispensable for human survival and social development. basic materials and supplies. However, a large number of discarded plastic products have brought "white pollution" to the human living environment due to their non-degradability. At present, there are many methods for dealing with "white waste" such as plastic waste, such as incineration, recycling, burying, etc., but the treatment effects are not ideal. If waste plastics are landfilled, this treatme...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/04C08L67/02C08L5/08C08B37/08
CPCC08L67/04C08B37/003C08L67/02C08L2201/02C08L2201/06C08L2201/08C08L2201/22C08L5/08
Inventor 江赛华师星星
Owner SOUTH CHINA UNIV OF TECH
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