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Photodegradation-rate-controllable polyformaldehyde and preparation method thereof

A polyoxymethylene and photodegradation technology, applied in recycling technology, plastic recycling and other directions, can solve the problems of non-degradability of polyoxymethylene, increased environmental pressure, difficult problems, etc., to solve the problem of photodegradation and photodegradation speed, reduce environmental Effects of load problems

Inactive Publication Date: 2011-05-25
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Due to its excellent properties, polyoxymethylene has been widely used, but the environmental pressure brought by its stability continues to increase, and the problems caused by the post-treatment of polyoxymethylene are particularly difficult
Although methods such as landfilling, burning and recycling can be adopted, the research results have proved that these methods have different degrees of disadvantages
Due to its excellent properties, polyoxymethylene has been widely used in various fields, but the non-degradability of polyoxymethylene and the environmental load brought by it after being discarded are one of the problems faced by human beings.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0008] Embodiment 1: The composite photocatalyst of polyoxymethylene and nano-titanium dioxide and manganese is mixed with the mass ratio of 94:6 to obtain the polyoxymethylene of photodegradation speed controllable type, wherein the mass ratio of nano-titanium dioxide and manganese in the composite photocatalyst is 100 : 50. The masterbatch can be further made into other products, and the service life of the products can be controlled within 8-10 years.

Embodiment 2

[0009] Embodiment 2: The composite photocatalyst of polyoxymethylene and nano-titanium dioxide and manganese is mixed with the mass ratio of 96: 4 to obtain the polyoxymethylene of photodegradation speed controllable type, wherein the mass ratio of nano-titanium dioxide and manganese in the composite photocatalyst is 100 : 100. The masterbatch can be further made into other products, and the service life of the products can be controlled within 8-10 years.

Embodiment 3

[0010] Embodiment 3: The composite photocatalyst of polyoxymethylene and nano-titanium dioxide and manganese is mixed with the mass ratio of 98: 2 to obtain the polyoxymethylene of photodegradation speed controllable type, wherein the mass ratio of nano-titanium dioxide and manganese in the composite photocatalyst is 100 : 60. The masterbatch can be further made into other products, and the service life of the products can be controlled within 8-10 years.

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PUM

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Abstract

The invention relates to photodegradation-rate-controllable polyformaldehyde and a preparation method thereof. Polyformaldehyde and nano titanium dioxide, and a compound photocatalyst of manganese, copper or aluminum are molten and mixed according to the mass ratio of (94-98):(2-6) to obtain the photodegradation-rate-controllable polyformaldehyde. In the invention, the addition of the photocatalyst can not generate any adverse effect on the processing performance and service performance of the product. The invention solves the problems of non-degradability and degradation rate of the polyformaldehyde under the condition of natural light; and since the polyformaldehyde is cheap, the market consumption is high, but the stability of the polyformaldehyde leads to non-degradability, and the invention also solves the problem of high environmental load after the polyformaldehyde is discarded.

Description

technical field [0001] The invention relates to polyoxymethylene and a preparation method thereof, in particular to a polyoxymethylene with controllable photodegradation speed and a preparation method thereof. Background technique [0002] POM has been widely used due to its excellent properties, but the environmental pressure brought by its stability continues to increase, and the problems caused by the post-treatment of POM are particularly difficult. Although methods such as landfilling, burning and recycling can be adopted, the research results have proved that these methods have disadvantages to varying degrees. Due to its excellent properties, polyoxymethylene has been widely used in various fields, but the non-degradability of polyoxymethylene and the environmental load brought by its disposal are one of the problems faced by human beings. Contents of the invention [0003] The object of the present invention is to solve the above existing problems in the prior art...

Claims

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Application Information

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IPC IPC(8): C08L59/02C08J11/16
CPCY02W30/62
Inventor 刘保健刘效兰王兰郑慧文钱秋萍李鹏刘江锋厉涛
Owner SHAANXI UNIV OF SCI & TECH
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