Application of chlorinated polyvinyl chloride to water treatment of hollow fiber membrane and preparation method of hollow fiber membrane

A chlorinated polyvinyl chloride and fiber membrane technology, applied in the field of water treatment, can solve the problems of high brittleness and easy decomposition when heated, and achieve the effects of avoiding decomposition, fast dissolving, and reducing production costs.

Active Publication Date: 2014-11-19
康泽源(天津)科技发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the characteristics of CPVC material, which is easy to decompose when heated, and is brittle and difficult to spin and form, there is no report on making CPVC resin as the main material into hollow fiber membranes.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] (1) After mixing CPVC, pore forming agent and processing aid evenly, add it to a reaction kettle with a solvent, heat it to 60°C, stir and dissolve evenly, and make a polymer homogeneous solution.

[0031] Among them, CPVC adopts chlorinated polyvinyl chloride resin with a weight average molecular weight of 160,000 Daltons and a chlorine content of 64.5%, and the percentage content is 25%. The solvent adopts dimethylformamide, and the percentage content is 53%. The pore forming agent adopts polyvinylpyrrolidone, and the percentage content is 14%. Processing aids include antioxidants, UV absorbers, light stabilizers and heat stabilizers. Among them, the antioxidant adopts 2.6-di-tert-butyl-4-methylphenol, the percentage content is 2%; the ultraviolet absorber adopts 2-hydroxyl-4-n-octyloxybenzophenone, the percentage content is 2%; The stabilizer is bis(2,2,6,6-tetramethyl-4-piperidinyl) sebacate, the percentage content is 2%; the heat stabilizer is methyl tin maleic a...

Embodiment 2

[0036] The preparation method is the same as that of Example 1, except that the heating temperature is 70° C., and the vacuum is pumped at -0.3 MPa for 3 hours.

[0037] Among them, CPVC adopts chlorinated polyvinyl chloride resin with a weight average molecular weight of 180,000 Daltons and a chlorine content of 65.5%, and the percentage content is 25%. Solvent adopts dimethylbenzene, and percentage composition is 58%. The pore-forming agent is a mixture of polyethylene glycol and Tween 80, the percentage content is 11%, and the ratio of polyethylene glycol and Tween is 10 to 1. Processing aids include antioxidants, light stabilizers, and heat stabilizers; antioxidants use β-(3,5 di-tert-butyl-4-hydroxyphenyl) propionate n-octadecanoate, the percentage content is 2%; The stabilizer is bis(2,2,6,6-tetramethyl-4-piperidinyl) sebacate, the percentage content is 2%; the heat stabilizer is methyl tin maleic anhydride, the percentage content is 2% .

[0038] The inner diameter o...

Embodiment 3

[0040] The preparation method is the same as that of Example 1, except that the heating temperature is 80° C., and the vacuum is drawn at -0.6 MPa for 2 hours.

[0041] Among them, CPVC adopts chlorinated polyvinyl chloride resin with a weight average molecular weight of 180,000 Daltons and a chlorine content of 66%, and the percentage content is 26%. Solvent adopts dimethyl sulfoxide, and the percentage content is 58%. The pore forming agent is a mixture of polyvinyl alcohol and Span, the percentage content is 12%, and the ratio of polyvinyl alcohol to Span 80 is 5:1. The antioxidant uses β-(3,5 di-tert-butyl-4-hydroxyphenyl) propionate n-octadecanoate, the percentage content is 1%; the ultraviolet absorber uses 2-hydroxy-4-n-octyloxydi Benzophenone, the percentage content is 1%; light stabilizer adopts bis(2,2,6,6-tetramethyl-4-piperidinyl) sebacate, the percentage content is 1%; heat stabilizer Using methyl tin mercaptide, the percentage content is 1%.

[0042] The inner d...

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PUM

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Abstract

The invention discloses an application of chlorinated polyvinyl chloride to water treatment of a hollow fiber membrane and a preparation method of the hollow fiber membrane and provides a hollow fiber membrane which takes chlorinated polyvinyl chloride as a main material. The hollow fiber membrane comprises the following active ingredients in percentage by mass: 15-35% of CPVC (Chlorinated Polyvinyl Chloride), 40-60% of a solvent, 5-15% of a pore-foaming agent and 4-15% of processing aid. The preparation method of the hollow fiber membrane comprises the following steps: uniformly mixing CPVC, the pore-forming agent and the processing aid and adding into a reaction kettle which is filled with the solvent, heating to 50-90 DEG C, and uniformly dissolving by stirring to prepare a polymer homogeneous solution; and standing and defoaming, then pumping vacuum and detecting the defoaming effect, and spinning and forming after defoaming is ended. The prepared hollow fiber membrane is good in chemical resistance, relatively applicable to the filtration industry of tap water with hypochlorous acid and capable of facilitating chemical washing of membrane filaments in the sewage industry with serious pollution and prolonging the service lives of the membrane filaments; and moreover, the production cost of the hollow fiber membrane can be greatly reduced, so that the wide popularization of the environmental protection water treatment process can be facilitated.

Description

technical field [0001] The invention relates to the technical field of water treatment, in particular to an application of chlorinated polyvinyl chloride in hollow fiber membrane materials for water treatment, a chlorinated polyvinyl chloride hollow fiber membrane and a preparation method thereof. Background technique [0002] Membrane separation technology, as an energy-saving, environmental-friendly and high-efficiency chemical technology, has been widely used in the context of rapid industrialization. There are many membrane materials that can be used to prepare hollow fiber membranes. At present, there are polymers that have been commercialized. Vinylidene fluoride (PVDF), polyethersulfone (PES), polysulfone (PS), polyethylene (PE), polyvinyl chloride (PVC), polyacrylonitrile (PAN) and other materials. [0003] Chlorinated polyvinyl chloride (CPVC) resin material is a new type of synthetic polymer material obtained by the substitution reaction of specific grades of polyv...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/30B01D69/08B01D67/00
Inventor 娄鹏
Owner 康泽源(天津)科技发展有限公司
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