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Process for preparing light degradable nano TiO2 polyethylene composite plastics

A technology of compounding plastics and polyethylene, applied in the field of polymer-nanocomposite materials, can solve the problems of low return rate and high cost, and achieve the effect of reducing impact, low cost and simple process

Inactive Publication Date: 2006-11-15
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] Example 1: Surface treatment of nano titanium dioxide powder with silane coupling agent (Wuda Silicone Material Co., Ltd. brand: WD-20). The silane coupling agent can be dissolved in acetone to form a 2wt% solution, and then mixed with particles Anatase titanium dioxide powder with a diameter of 25nm is mixed uniformly, heated to 80□, constant temperature for 1 hour, the weight of the silane coupling agent is TiO 2 3% by weight. Press TiO 2 :Polyethylene:Polyethylene wax is a weight ratio of 30:10:60, and the surface-treated TiO 2 Blended with polyethylene (weight average molecular weight 300,000 g / mol, GPC method determination) and polyethylene wax (weight average molecular weight 4000g / mol) on a twin-screw mixer to obtain masterbatch, and then the masterbatch and polyethylene Raw materials (weight-average molecular weight 300,000 g / mol, GPC method determination) are blended to make nano-TiO in the composite plastic 2 The content is 2wt%, and the nano TiO is produced by mi...

Embodiment 2

[0017] Example 2: Surface treatment of nano titanium dioxide powder with titanate coupling agent (Nanjing Shuguang Chemical Factory NDZ-201). The titanate coupling agent can be dissolved in ethanol to prepare a 3wt% solution, and then mixed with The anatase titanium dioxide powder with a particle size of 180nm is uniformly mixed, 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. Press TiO 2 :Polyethylene:Polyethylene wax is 20:10:70 weight ratio, and the surface-treated TiO 2 With polyethylene (weight average molecular weight 90,000 g / mol, measured by GPC method) and polyethylene wax (weight average molecular weight 2000g / mol, measured by GPC method) on a twin-screw mixer, blended and extruded to obtain a masterbatch, and then the masterbatch Granules and polyethylene raw materials (weight-average molecular weight 90,000 g / mol, GPC method determination) blended to make nano-TiO in the composite plastic 2 ...

Embodiment 3

[0018] Example 3: Surface treatment of nano titanium dioxide powder with aluminum titanate composite coupling agent (Shanxi Chemical Industry Research Institute OL-AT1618). The aluminum titanate coupling agent can be dissolved in organic solvents such as ethanol or acetone. Prepare 1wt% solution, then mix it with 80nm particle size part anatase part rutile titanium dioxide powder powder, heat to 90℃, keep constant temperature for 1 hour, the weight of aluminum titanate coupling agent is TiO 2 2% by weight. Press TiO 2 : The weight ratio of polyethylene wax is 40:60, and the surface-treated TiO 2 Blended with polyethylene wax (weight average molecular weight 5000g / mol, GPC method determination) on a twin-screw mixer to obtain masterbatch, and then masterbatch and polyethylene raw materials (weight average molecular weight 170,000 g / mol, GPC method) Determination) blending to make the nano-TiO in the composite plastic 2 The content is 3wt% (weight percentage), and the nano-TiO is pr...

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Abstract

The invention relates to a highly efficient photodegradable nano TiO 2 -The preparation method of polyethylene composite plastic, nano-TiO 2 Surface modification of powder with surface modifier to obtain modified nano-TiO 2 Powder, will be modified nano-TiO 2 Powder, polyethylene, and polyethylene wax are blended and extruded on a twin-screw mixer containing nano-TiO 2 Masterbatch, TiO in masterbatch 2 The content is 20-40wt%, the polyethylene content is 0-20wt%, the polyethylene wax content is 40-80wt%, and then the nano-TiO 2 The masterbatch is blended with polyethylene raw materials, and the TiO is prepared by mixing with a twin-screw mixer 2 The content of 0.5-5wt% photodegradable nano-TiO 2 Polyethylene composite plastic; nano-TiO mentioned above 2 The powder is anatase or part anatase and part rutile, and the particle size is 20-200nm. The invention has low cost and simple process, and the prepared photodegradable nano-TiO 2 - Polyethylene composite plastics can be effectively photodegraded under sunlight after being used and discarded, which can reduce the impact of white pollution.

Description

Technical field [0001] The invention relates to a photodegradable nano TiO 2 -Polyethylene composite plastics, in particular to a method for preparing highly efficient photodegradable plastics, belonging to the field of polymer-nano composite materials. Background technique [0002] As a conventional plastic, polyethylene has a wide range of uses, especially its disposable products. Due to the stable structure of polyethylene, it is difficult to degrade under natural conditions. More and more discarded polymer materials-white pollution has brought tremendous pressure to our ecological environment. How to deal with "white garbage" is a very urgent problem. At present, the main methods to deal with these wastes are deep burial, incineration, recycling and reprocessing, etc. In fact, these methods have not brought new environmental problems while disposing of waste, or because of their high cost and low rate of return. It is prohibitive. It is urgent for people to properly treat suc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/06C08K3/22
Inventor 昝菱王松林罗其荣
Owner WUHAN UNIV
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