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Process for preparing light degradable nano composite plastics

A nano-composite plastic and photodegradation technology, applied in the field of high-efficiency photodegradable plastics, can solve the problems of low return rate and high cost, and achieve the effects of good dispersibility, low cost and improving photodegradation efficiency.

Inactive Publication Date: 2006-12-20
WUHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the main ways to deal with these wastes are deep burial, incineration, recycling and reprocessing, etc. In fact, these methods either bring new environmental problems while disposing of waste, or they are caused by high cost and low rate of return. daunting

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Embodiment 1: Carry out surface treatment to nano-titanium dioxide powder with silane coupling agent (brand name of Wuhan University Organic Silicon Material Co., Ltd.: WD-20), silane coupling agent is dissolved in acetone and is made into 2% solution, then with particle diameter The anatase titanium dioxide powder of 25nm is mixed evenly, heated to 80°C, and kept at a constant temperature for 1 hour. The weight of the silane coupling agent is TiO 2 3% by weight. The surface-treated TiO 2 By TiO 2 : polystyrene is the ratio of 2wt% to add in 100ml chloroform, ultrasonic oscillation disperses 5min, adds 20 gram commercial polystyrene (weight-average molecular weight 460,000 g / mol, GPC method is measured) particle, makes it fully dissolve under stirring, then Spread the viscous liquid on the surface of smooth objects such as ceramics and glass, and dry it naturally to obtain a photodegradable nanocomposite plastic film.

Embodiment 2

[0017] Embodiment 2: Carry out surface treatment to nano-titanium dioxide powder body with titanate coupling agent (Nanjing Shuguang Chemical Plant NDZ-201), titanate coupling agent is dissolved in ethanol, is made into 1% solution, then mixes with particle The anatase titanium dioxide powder with a diameter of 180nm is mixed evenly, heated to 90°C, and kept at a constant temperature for 1 hour. The weight of the titanate coupling agent is TiO 2 1% by weight. The surface-treated TiO 2 By TiO 2 : Polyvinyl chloride is added in 100ml chloroform in the ratio of 1wt%, ultrasonic vibration disperses 5min, adds 15 grams of commodity polyvinyl chloride (weight-average molecular weight 140,000 g / mol, GPC method is measured) particle, makes it fully dissolve under stirring, then Spread the viscous liquid on the surface of smooth objects such as ceramics and glass, and dry it naturally to obtain a photodegradable nanocomposite plastic film.

Embodiment 3

[0018] Embodiment 3: use aluminum titanate composite coupling agent (Shanxi Provincial Institute of Chemical Industry OL-AT1618) to carry out surface treatment to nano-titanium dioxide powder, aluminum titanate coupling agent can be dissolved in organic solvents such as ethanol or acetone, Prepare a 3wt% solution, then mix evenly with part of the anatase part of the rutile titanium dioxide powder with a particle size of 80nm, heat to 90 ° C, keep the temperature for 1 hour, and the weight of the aluminum titanate coupling agent is TiO 2 2% by weight. The surface-treated TiO 2 By TiO 2 : Expanded polystyrene is that the ratio of 3wt% is added in 100ml tetrahydrofuran, ultrasonic oscillation disperses 5min, adds 20 grams of expanded polystyrene i.e. white foam (250,000 g / mol of weight-average molecular weight, GPC method measures), makes under stirring It is fully dissolved, and then the viscous liquid is spread on the surface of smooth objects such as ceramics and glass, and ...

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PUM

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Abstract

The present invention relates to the preparation process of light degradable nanometer composite plastic. The preparation process includes the modification of nanometer TiO2 powder with surface modifier to obtain nanometer modified TiO2 powder; dissolving polystyrene, foamed polystyrene or polyvinyl chloride in chloroform or tetrahydrofuran as solvent; adding nanometer modified TiO2 powder; and volatilizing solvent to prepare the light degradable nanometer composite plastic, which has the weight ratio between polystyrene, foamed polystyrene or polyvinyl chloride and TiO2 powder in 100 to 0.5-5. The present invention has low cost and simple technological process, and the prepared light degradable nanometer composite plastic may be degraded in the sun to reduce white pollution.

Description

technical field [0001] The invention relates to a high-efficiency photodegradable plastic, in particular to a method for preparing photodegradable nano-polystyrene, expanded polystyrene and polyvinyl chloride composite plastic, belonging to the field of polymer-nano composite materials. Background technique [0002] Polystyrene, expanded polystyrene, and polyvinyl chloride are widely used as a conventional plastic, especially disposable products (white foam) of expanded polystyrene are used in the packaging industry to protect various fragile and Electronic products are used in a huge amount. Due to the stable structure of polystyrene, it is difficult to degrade under natural conditions, especially white foam, which is light in weight and large in size, and it will not degrade for 100 years even if it is buried in the soil. More and more waste polymer materials-white pollution has brought great pressure to our ecological environment, how to deal with "white waste" is a very...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L25/06C08L27/06C08K3/22C08K9/00
Inventor 昝菱田丽红钟家柽
Owner WUHAN UNIV
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