Polypropylene hollow fiber separating membrane and preparation method thereof

A fiber separation and polypropylene technology, applied in the field of material science, can solve the problems of easy generation of dense skin layer and low water flux of polypropylene separation membrane, and achieve the effect of good application prospect, excellent chemical resistance performance and high mechanical strength.

Active Publication Date: 2014-03-26
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In order to solve the problems of dense skin layer and low water flux of polypropylene separation membrane in the preparation process of polypropylene separation membrane in the prior art, the present invention provides a polypropylene hollow fiber separation membrane and its preparation method

Method used

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  • Polypropylene hollow fiber separating membrane and preparation method thereof
  • Polypropylene hollow fiber separating membrane and preparation method thereof
  • Polypropylene hollow fiber separating membrane and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] A kind of preparation method of polypropylene hollow fiber separation membrane, concrete steps are as follows:

[0049] (1) Add polypropylene resin and diluent to a container with a stirring device, the mass percentage of polypropylene resin is 10%, the melt index is 0.1g / 10min, and the weight average molecular weight is 1.0×10 6 , soybean oil as a diluent, the mass percentage is 90%, adipic acid is used as an additive, the addition amount is 0.5% of the polypropylene mass, heated to 200 ° C, and stirred for 3 hours under the condition of nitrogen, stop stirring and stand for defoaming 2h, obtain casting solution;

[0050] (2) Use a metering pump to transport the casting liquid to the spinneret, and introduce peanut oil with a temperature of 20°C as an internal solidification medium into the spinneret to form a hollow fiber membrane, and the temperature of the spinneret is 175°C;

[0051] (3) The hollow fiber membrane formed in step (2) is passed through the external c...

Embodiment 2

[0054] A kind of preparation method of polypropylene hollow fiber separation membrane, concrete steps are as follows:

[0055] (1) Add polypropylene resin and diluent to a container with a stirring device, the mass percentage of polypropylene resin is 20%, the melt index is 0.2g / 10min, and the weight average molecular weight is 8.9×10 5 , soybean oil as a diluent, the mass percentage is 80%, benzoic acid is used as an additive, the addition amount is 0.3% of the polypropylene mass, heated to 190°C, and stirred for 1h under the condition of nitrogen flow, after the stirring is stopped, stand for defoaming for 2h , to obtain the casting solution;

[0056] (2) Use a metering pump to transport the casting liquid to the spinneret, and introduce soybean oil with a temperature of 20°C as an internal solidification medium into the spinneret to form a hollow fiber membrane, and the temperature of the spinneret is 170°C;

[0057] (3) The hollow fiber membrane formed in step (2) is pass...

Embodiment 3

[0060] A kind of preparation method of polypropylene hollow fiber separation membrane, concrete steps are as follows:

[0061] (1) Add polypropylene resin and diluent to a container with a stirring device, the mass percentage of polypropylene resin is 30%, the melt index is 2.7g / 10min, and the weight average molecular weight is 4.1×10 5 , soybean oil as a diluent, the mass percentage is 70%, TMB-1 is used as an additive, the addition amount is 0.4% of the polypropylene mass, heated to 210°C, and stirred for 0.5h under the condition of nitrogen, and left to stand after the stirring is stopped. Soak for 0.5h to obtain the casting solution;

[0062] (2) Use a metering pump to transport the casting liquid to the spinneret, and introduce castor oil with a temperature of 80°C as an internal solidification medium into the spinneret to form a hollow fiber membrane, and the temperature of the spinneret is 175°C;

[0063] (3) The hollow fiber membrane formed in step (2) is passed throu...

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Abstract

The invention discloses a polypropylene hollow fiber separating membrane and a preparation method thereof. The polypropylene hollow fiber separating membrane disclosed by the invention comprises the components of 10-40 percent of polypropylene resin and 60-90 percent of diluting agent, the melt index of the polypropylene resin used in the invention is 0.1-4g/10min, and the weight-average molecular weight of the polypropylene resin is 3*10<5>-1.2*10<6>. According to the polypropylene hollow fiber separating membrane, by using the polypropylene resin with high weight-average molecular weight, the concentration of a casting film solution can be reduced; the preparation method is convenient and simple to operate and easy to realize. The polypropylene hollow fiber separating membrane disclosed by the invention has the advantages of large micropores in the surface, large flux and higher porosity, and can be widely applied to the fields such as water treatment, membrane distillation, biology, medicines and energy sources, and is better in application prospect.

Description

technical field [0001] The invention belongs to the field of material science and relates to a separation membrane and a preparation method thereof, more specifically to a high-flux polypropylene hollow fiber separation membrane and a preparation method thereof. Background technique [0002] As an efficient separation technology, membrane technology has been used in sewage treatment and reuse, pure water production, chemical industry, energy, pure water production, seawater desalination, brackish water desalination, municipal water supply, It is widely used in electronics industry, pharmacy and bioengineering, food, textile and other fields. In the application of membrane technology, the membrane material is the basis and core of the development and application of membrane technology, and the performance of the membrane material directly affects the performance of the separation membrane. Polypropylene (PP) is a polyolefin material with large output and low price, and has g...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/26B01D67/00B01D69/08
Inventor 奚振宇王玉杰杨永强张新妙
Owner CHINA PETROLEUM & CHEM CORP
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