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High-strength easily degradable modified polyethylene film and preparation method thereof

A polyethylene film and easy-to-degrade technology, which is applied in the field of high-strength and easily-degradable modified polyethylene film and its preparation, can solve the problems that the performance of recycled products cannot meet the requirements, the economic benefits of recycling are not obvious, and the strength is not enough, and achieve green Low energy consumption compatibility, improved thermo-oxidative degradation, good degradation performance effect

Inactive Publication Date: 2018-08-28
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, unrestricted random disposal will lead to serious environmental pollution
Recycling is a method to solve the environmental pollution caused by plastic waste. At present, the main problem in plastic recycling is that it is difficult to separate from other degradable solid wastes. The second is that the performance of recycled products does not meet the requirements and the scope of application is limited, resulting in recycling. The economic benefits are not obvious; incineration will cause serious environmental problems
At present, the plastics produced from natural degradable polymer materials have the problems of high cost and insufficient strength. Therefore, the development of new plastic products with low cost and balanced mechanical properties and degradation properties is the best way to solve plastic pollution.

Method used

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  • High-strength easily degradable modified polyethylene film and preparation method thereof
  • High-strength easily degradable modified polyethylene film and preparation method thereof
  • High-strength easily degradable modified polyethylene film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Example 1 Preparation of high-strength and easily degradable modified polyethylene film

[0022] (1) Preparation of nano-copper oxide mimetic enzyme: according to the molar ratio of copper nitrate: water: sodium citrate is 1: 10: 1, first make a solution of copper nitrate and water, and then add the required molar amount of Saturated sodium citrate solution was added dropwise to the copper nitrate solution while stirring. After the dropwise addition, a complex salt solution was obtained. The complex salt solution was placed in a hydrothermal reaction kettle, and reacted at 100°C for 8h, 6000r / min centrifuged for 20 minutes, washed with water, vacuum-dried at 5kPa and 60°C for 30 minutes to obtain nano-copper oxide mimetic enzyme;

[0023](2) Preparation of nano-copper oxide mimetic enzyme coated with hydrophilic modified polyurea: according to the mass ratio of toluene-2,4-diisocyanate: triethylenetetramine: nano-copper oxide mimetic enzyme: water: acetone is 5:1 ︰5︰3...

Embodiment 2

[0026] Example 2 Preparation of high-strength and easily degradable modified polyethylene film

[0027] (1) Preparation of nano-copper oxide mimetic enzyme: according to the molar ratio of copper nitrate: water: sodium citrate is 1: 15: 1, first make a solution of copper nitrate and water, and then add the required molar amount of Saturated sodium citrate solution was added dropwise to the copper nitrate solution while stirring. After the dropwise addition, a complex salt solution was obtained. The complex salt solution was placed in a hydrothermal reaction kettle and reacted at 120°C for 12h, 8000r / min centrifuged for 40 minutes, washed with water, vacuum-dried at 20kPa and 80°C for 60 minutes to obtain nano-copper oxide mimetic enzyme;

[0028] (2) Preparation of nano-copper oxide mimetic enzyme coated with hydrophilic modified polyurea: according to the mass ratio of toluene-2,4-diisocyanate: triethylenetetramine: nano-copper oxide mimetic enzyme: water: acetone is 8:1 ︰1...

Embodiment 3

[0031] Example 3 Preparation of high-strength and easily degradable modified polyethylene film

[0032] (1) Preparation of nano-copper oxide mimetic enzyme: according to the molar ratio of copper nitrate: water: sodium citrate is 1: 11: 1, first make a solution of copper nitrate and water, and then add the required molar amount of Saturated sodium citrate solution was added dropwise to the copper nitrate solution while stirring. After the dropwise addition, a complex salt solution was obtained. The complex salt solution was placed in a hydrothermal reaction kettle and reacted at 110°C for 9h, 7000r / min centrifuged for 30min, washed with water, vacuum-dried at 8kPa and 70°C for 40min to obtain nano-copper oxide mimetic enzyme;

[0033] (2) Preparation of nano-copper oxide mimetic enzyme coated with hydrophilic modified polyurea: according to the mass ratio of toluene-2,4-diisocyanate: triethylenetetramine: nano-copper oxide mimetic enzyme: water: acetone is 6:1 ︰7︰4︰5 ratio o...

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Abstract

The invention discloses a high-strength easily degradable modified polyethylene film and a preparation method thereof and belongs to the technical field of easily degradable modified polyethylene films. The formula in the invention comprises polyethylene, ultra high molecular weight polyethylene, glass fibers, hydrophilic modified polyurea coated nanometer copper oxide mimic enzymes, octacalcium phosphate, nano-zinc oxide, N,N-methylene bisacrylamide, triethylene tetramine, an epoxy silane coupling agent, poly(vinyl ether), propylgallate, a glycidyl methacrylate grafted octylene-ethylene copolymer, maleic anhydride, polylactic acid, carboxymethyl starch, citric acid and a plasticizer. The polyethylene and nano powder are subjected to green and low-energy-consumption compatibility, hydrophilcity, reinforcing and toughening, photocatalysis and thermal oxidation promoted modification, and by virtue of the technical means of one-step cold grinding modification and further repeated melt co-extrusion modification, the modified polyethylene is prepared. The prepared modified polyethylene has synchronously enhanced mechanical property and good degradation property, and the process is simple, low in cost and easy for industrial production.

Description

technical field [0001] The invention relates to a high-strength easily degradable modified polyethylene film and a preparation method thereof, belonging to the technical field of easily degradable modified polyethylene film. Background technique [0002] Plastics include synthetic and semi-synthetic polymers composed of carbon, hydrogen, and oxygen. They are widely used because of their easy availability, high strength, light weight, and toughness, and the resulting amount of waste is also huge. The random discarding of plastics has led to serious water and soil pollution. Among them, polyethylene is widely used to make plastic bags, milk containers, beverage bottles, food packaging films, toys and irrigation pipes, etc. It is the most common solid waste, accounting for about 60% of the total plastic bag production. Due to its large molecular weight, hydrophobicity and no biodegradable functional groups, polyethylene is not easy to degrade and can exist stably in the natura...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/06C08L51/06C08L67/04C08L3/08C08K13/06C08K9/10C08K3/22C08K7/14C08K3/32C08K5/092C08J5/18
CPCC08J5/18C08J2323/06C08J2403/08C08J2423/06C08J2451/06C08J2467/04C08K5/092C08K7/14C08K9/10C08K13/06C08K2003/2248C08K2003/2296C08K2003/325C08K2201/011
Inventor 顾文秀邹路易孙余凭方波何志毅周小兰滕跃
Owner JIANGNAN UNIV
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