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A combined preparation method of hydrophilic ultra-high molecular weight polyethylene powder

An ultra-high molecular weight, polyethylene powder technology, applied in the field of combined preparation of hydrophilic ultra-high molecular weight polyethylene powder, can solve the problems of reduced service life, reduced mechanical properties, large environmental pollution, etc., and achieves excellent wear resistance, Low production cost and good performance

Active Publication Date: 2017-09-15
HUBEI ENG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the industry, there are inorganic powders such as graphite powder and molybdenum disulfide as additives for wear resistance and anti-friction performance, and organic powders include ultrafine polytetrafluoroethylene powder, but it is difficult to introduce polar organic groups on the surface of these powders. Adding other polymer materials will inevitably lead to a significant decline in its mechanical properties, which will eventually lead to a reduction in the service life of the product
[0005] There are also a lot of reports about the method of modifying the surface of UHMWPE powder in related research, but there is no domestic manufacturer to provide this product. The Chinese patent application "Method for modifying the surface of UHMWPE powder by interfacial polycondensation (application number: 2011101586469)" The method of solution polycondensation is used to modify the surface of UHMWPE powder. The method of solution polycondensation has advantages, such as the molecular structure of the powder surface can be constructed more accurately, but the method of solution polycondensation also has disadvantages, such as the need for a large amount of toxic solvents in the reaction, Highly active acyl chlorides and isocyanate reagents used in polycondensation are costly and environmentally polluting, and the molecular weight formed by polycondensation is not high

Method used

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  • A combined preparation method of hydrophilic ultra-high molecular weight polyethylene powder
  • A combined preparation method of hydrophilic ultra-high molecular weight polyethylene powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Embodiment 1 (comparative example)

[0041] In this example, the raw material UHMWPE powder is directly tested for performance without any pretreatment and chemical reaction.

[0042] Add 10g of raw UHMWPE powder into 500ml of water, and stir vigorously to disperse for 60 minutes. After the stirring is stopped, the UHMWPE powder rises rapidly to the water surface, and keeps floating on the water surface, forming accumulations on the water surface (see figure 1 ); It is difficult to melt and mix thermoplastic polyurethane elastomer and raw material UHMWPE powder, and the polarity of the molecular chains of the two materials is too different.

Embodiment 2

[0044] A combined preparation method of hydrophilic ultra-high molecular weight polyethylene powder, the specific steps are as follows:

[0045] Step 1: Put 100g of raw material UHMWPE powder directly in the air for ultraviolet irradiation: the wavelength of the ultraviolet lamp is 365-450nm, and the light intensity is 80w / m 2 , irradiated at 80°C for 120 minutes;

[0046] Step 2: The UHMWPE powder obtained in Step 1 is subjected to ozone treatment: the ozone concentration is 100mg / m 3 , the temperature is 100°C, the time is 30 minutes, and naturally cooled to room temperature after treatment;

[0047] Step 3: Disperse the UHMWPE powder obtained in Step 2 into 500ml of distilled water, then add 2ml of methacrylic acid, 5ml of methyl methacrylate, 2ml of vinyl acetate, 1ml of trimethylolpropane triacrylate, 0.01g of di Benzoyl, 5% (w / v) polyvinyl alcohol (PVA1788) aqueous solution 20ml and 10ml decahydronaphthalene, under the protection of high-purity nitrogen (99.999%), full...

Embodiment 3

[0053] A combined preparation method of hydrophilic ultra-high molecular weight polyethylene powder, the specific steps are as follows:

[0054] Step 1: Put 100g of raw material UHMWPE powder directly in the air for ultraviolet irradiation: the wavelength of the ultraviolet lamp is 365-450nm, and the light intensity is 80w / m 2 , irradiated at 80°C for 150 minutes;

[0055] Step 2: The UHMWPE powder obtained in Step 1 is subjected to ozone treatment: the ozone concentration is 100mg / m 3 , the temperature is 100°C, the time is 45 minutes, and naturally cooled to room temperature after treatment;

[0056] Step 3: Disperse the UHMWPE powder obtained in step 2 into 500ml of distilled water, then add 2ml of acrylic acid, 5ml of methyl methacrylate, 2ml of butyl methacrylate, 1ml of trimethylolpropane triacrylate, 0.01g of di Benzoyl, 5% (w / v) polyvinyl alcohol (PVA1788) aqueous solution 20ml and 10ml decahydronaphthalene, under the protection of high-purity nitrogen (99.999%), ful...

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Abstract

The invention belongs to the technical field of high-molecular material preparation and particularly discloses a combined preparation method of hydrophilic ultra-high molecular weight polyethylene powder, which is a method for preparing surface-polarized ultra-high molecular weight polyethylene powder through ultraviolet irradiation and ozone treatment before free radical graft polymerization in an aqueous solution, wherein the prepared product has a large number of hydrophilic groups on the surface and can be mixed with water and even sink to the water bottom; and the preparation technology is more environmentally friendly and facilitates industrial large-batch production. The prepared hydrophilic ultra-high molecular weight polyethylene powder has excellent performance and can form a polymer alloy material with good comprehensive performance together with a large quantity of polymer materials; the combined alloy material maintains the excellent wear resistance, self-lubricating property and good impact strength of ultra-high molecular weight polyethylene without influencing the mechanical properties of the modified materials; and the hydrophilic ultra-high molecular weight polyethylene powder is widely applied to the fields of plastic, rubber, coating and adhesives.

Description

technical field [0001] The invention relates to the technical field of preparation of polymer materials, in particular to a combined preparation method of hydrophilic ultra-high molecular weight polyethylene powder, which is a method of first ultraviolet irradiation, ozone treatment, and then free radical graft polymerization in aqueous solution A method for preparing surface polarized hydrophilic ultra-high molecular weight polyethylene powder. Background technique [0002] Ultra-high molecular weight polyethylene (UHMWPE) is a thermoplastic engineering plastic with excellent comprehensive properties. In 1958, a German chemist invented the most basic coordination catalytic synthesis method. On this basis, chemists from various countries have successively improved it. , and finally developed UHMWPE with a relative molecular weight of more than 10 million. It has unparalleled impact resistance, wear resistance, chemical corrosion resistance, low temperature resistance, stres...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F255/02C08F220/14C08F220/06C08F218/08C08F222/14C08F220/18C08F220/56C08J3/28C08J3/00C08L75/04C08L51/06
CPCC08F255/02C08J3/00C08J3/28C08J2323/06C08L75/04C08F220/14C08L51/06
Inventor 周建刚胡新良胡远强周毅刘海
Owner HUBEI ENG UNIV