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Rapid photocatalytic degradation composite plastic

A composite plastic and photocatalytic technology, applied in the field of composite plastics, can solve the problems of low photocatalyst activity and insufficient degradation, and achieve the effects of improving photocatalytic activity, excellent photocatalytic performance, and expanding light response range.

Inactive Publication Date: 2019-04-05
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, the invention patent with the application number 200980128631.9 uses carbon-modified titanium dioxide as a photocatalyst and mixes it into plastic products to make photodegradable plastics. However, due to the low activity of the photocatalyst, its plastic products still cannot Fully degraded in the environment

Method used

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  • Rapid photocatalytic degradation composite plastic
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  • Rapid photocatalytic degradation composite plastic

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Preparation of copper ion surface-modified anatase titanium dioxide: 1 g of anatase titanium dioxide and 0.00268 g of copper chloride dihydrate (containing 0.001 g of copper ion) were dispersed in 10 mL of deionized water. Then, under the condition of 90° C. water bath, keep warm and magnetically stir for 1 h. It was then filtered and washed several times with deionized water. Finally, it was kept in an oven at 110°C for 24 hours, dried and then ground.

Embodiment 2

[0025] Preparation of anatase titanium dioxide surface-modified by iron ions: 1 g of anatase titanium dioxide and 0.00484 g of ferric chloride hexahydrate (containing 0.001 g of iron ions) were dispersed in 10 mL of deionized water. Then, under the condition of 90° C. water bath, keep warm and magnetically stir for 1 h. It was then filtered and washed several times with deionized water. Finally, it was kept in an oven at 110°C for 24 hours, dried and then ground.

Embodiment 3

[0027] Treatment of unmodified pure anatase titanium dioxide: take 1 g of anatase titanium dioxide and disperse it in 10 mL of deionized water. Then, under the condition of 90° C. water bath, keep warm and magnetically stir for 1 h. It was then filtered and washed several times with deionized water. Finally in

[0028] Insulate in an oven at 110°C for 24 hours, dry and then grind.

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Abstract

The invention discloses a rapid photocatalytic degradation composite plastic. The rapid photocatalytic degradation composite plastic is characterized in that polymers contains uniformly dispersed ironion or copper ion surface modified titanium dioxide with excellent photocatalytic performance, namely, anatase or rutile phase or mixed crystals of the anatase. Therefore, compared with pure plasticsand unmodified titanium dioxide-containing composite plastics, the copper / iron ion-containing surface modified titanium dioxide composite plastic can present excellent photocatalytic degradation performance. The rapid photocatalytic degradation composite plastic has the advantages that, under light irradiation for 240 h, the composite plastic doped with 4 wt% of copper ion surface modified titanium dioxide achieves a weight loss ratio up to 30.07%; the composite plastic doped with 2 wt% of copper ion surface modified titanium dioxide achieves a weight loss ratio up to 13.93%, the composite plastic doped with 2 wt% of surface unmodified pure titanium dioxide achieves a weight loss rate of 6.82%; pure plastic with no photocatalysts doped only achieves a weight loss ratio of 2.68%.

Description

technical field [0001] The invention relates to the technical field of polymer plastics, in particular to a composite plastic capable of rapid photocatalytic degradation. Background technique [0002] Plastic products are widely used in various fields of the national economy such as information, energy, industry and agriculture, and transportation due to their light weight, low cost, and wide functions, and together with steel, wood, and cement, they constitute the four major components of modern society. Basic materials have greatly promoted the rapid development of the national economy. However, due to the extremely stable internal structure of plastic products, it is difficult to degrade in the natural environment, which brings hidden dangers that are difficult to clean up for the environment and people's production and life, so it is called "white pollution". According to relevant data, from 2011 to 2016, the output of my country's plastic products increased rapidly fro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/06C08K9/02C08K3/22
CPCC08K9/02C08K3/22C08K2003/2241C08L2201/06C08L23/06
Inventor 邱晓清梁祥刘敏
Owner CENT SOUTH UNIV