Hydrophilic polypropylene-nylon composite hollow fiber membrane and preparation method thereof

A nylon composite material, polypropylene technology, applied in the field of material science, to achieve the effect of high efficiency, less pollution, and improved hydrophilicity

Active Publication Date: 2014-07-30
贵州益华膜科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to: provide a kind of hydrophilic polypropylene-nylon composite hollow fiber membrane and its preparation method, its hydrophilicity is obviously improved and can be maintained for a long time, the water flux is large, the retention rate is high, it is not easy to produce pollution, and The process is simple to overcome the deficiencies of the prior art

Method used

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  • Hydrophilic polypropylene-nylon composite hollow fiber membrane and preparation method thereof
  • Hydrophilic polypropylene-nylon composite hollow fiber membrane and preparation method thereof
  • Hydrophilic polypropylene-nylon composite hollow fiber membrane and preparation method thereof

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Embodiment 1

[0015] Embodiment 1 of the present invention: the preparation method of hydrophilic polypropylene-nylon composite hollow fiber membrane comprises the following steps:

[0016] (1) Preparation of polypropylene-nylon composite material: Homopolypropylene, polypropylene grafted maleic anhydride and nylon were vacuum-dried at 80°C and mixed evenly according to the mass ratio of 85:5:10; then added In the reactive twin-screw extruder with an aspect ratio greater than 40, the extrusion speed is controlled at 150 rpm, and the temperature control of each section from the feeding port to the die head is: 180°C, 195°C, 205°C, 215°C, 220°C, 225°C, 225°C, 230°C, 230°C, 230°C, 230°C, 230°C, melt extrusion and granulation to prepare polypropylene-nylon composite material; the prepared polypropylene-nylon composite material is melted Index and hydrophilic performance can be seen in Table 1;

[0017] (2) Preparation of polypropylene hollow fiber membrane by thermally induced phase separation...

Embodiment 2

[0018] Embodiment 2 of the present invention: the preparation method of hydrophilic polypropylene-nylon composite hollow fiber membrane comprises the following steps:

[0019] (1) Preparation of polypropylene-nylon composite material: Homopolypropylene, polypropylene grafted maleic anhydride and nylon were vacuum-dried at 80°C and mixed evenly according to the mass ratio of 75:5:20; then added In the reactive twin-screw extruder with an aspect ratio greater than 40, the extrusion speed is controlled at 150 rpm, and the temperature control of each section from the feeding port to the die head is: 180°C, 195°C, 205°C, 215°C, 220°C, 225°C, 225°C, 230°C, 230°C, 235°C, 235°C, 235°C, melt extrusion and granulation to prepare polypropylene-nylon composite materials; the prepared polypropylene-nylon composite materials were melted Index and hydrophilic performance can be seen in Table 1;

[0020] (2) Polypropylene hollow fiber membrane was prepared by thermally induced phase separati...

Embodiment 3

[0021] Embodiment 3 of the present invention: the preparation method of hydrophilic polypropylene-nylon composite hollow fiber membrane comprises the following steps:

[0022] (1) Preparation of polypropylene-nylon composite material: Homopolypropylene, polypropylene grafted maleic anhydride and nylon were vacuum-dried at 80°C and mixed evenly according to the mass ratio of 65:5:30; then added In the reactive twin-screw extruder with an aspect ratio greater than 40, the extrusion speed is controlled at 150 rpm, and the temperature control of each section from the feeding port to the die head is: 180°C, 195°C, 205°C, 215°C, 220°C, 225°C, 225°C, 230°C, 230°C, 235°C, 235°C, 235°C, melt extrusion and granulation to prepare polypropylene-nylon composite materials; the prepared polypropylene-nylon composite materials were melted Index and hydrophilic performance can be seen in Table 1;

[0023] (2) Preparation of polypropylene hollow fiber membrane by thermally induced phase separa...

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Abstract

The invention discloses a hydrophilic polypropylene-nylon composite hollow fiber membrane and a preparation method thereof. The hydrophilic polypropylene-nylon composite hollow fiber membrane comprises the following components in parts by mass: 10-35 parts of a polypropylene-nylon composite material, 45-70 parts of a nonpolar ester thinning agent, 1-25 parts of a polar ester thinning agent and 0.1-0.5 part of an antioxidant, wherein the polypropylene-nylon composite material contains polypropylene, a compatilizer and nylon, and the mass ratio of polypropylene to the compatilizer to the nylon is (90-60):(0-10):(5-30). According to the hydrophilic polypropylene-nylon composite hollow fiber membrane, the proper compatilizer is utilized for carrying out capacity expansion and modification on polypropylene and the nylon so as to prepare the polypropylene-nylon composite material, hydrophobic polypropylene is subjected to hydrophilic blending modification, and meanwhile, the nylon is added, so that the polarity of a membrane material is increased, the hydrophilicity of the composite material can be remained for a long time, the efficiency of a preparation process is high, and a method is simple and is suitable for industrial production; a thermally induced phase separation method is utilized for spinning so as to prepare the hollow fiber membrane, so that the process is simple, a pore structure of the membrane is easy to regulate and control, and the stability of a membrane yarn is good.

Description

technical field [0001] The invention relates to the field of material science, in particular to a hydrophilic polypropylene-nylon composite hollow fiber membrane and a preparation method thereof. Background technique [0002] In recent years, membrane technology has been widely used in water treatment, food and beverage, electronics industry, medicine and health and biological products and other industries. The development of membranes with high flux, high strength, good stability and low price is the direction of membrane technology development. In the field of membrane research, polypropylene has attracted much attention as a membrane material. Polypropylene has the advantages of being insoluble in any organic solvent at room temperature, good acid and alkali resistance and biological corrosion resistance, good temperature resistance and low price, and is a cost-effective membrane material. Polypropylene can be used not only to prepare membranes such as battery separator...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/26B01D71/56B01D69/12B01D69/08B01D69/02B01D67/00
Inventor 吴斌张凯舟邵会菊杨敬葵张敏敏姚勇秦舒浩徐国敏
Owner 贵州益华膜科技有限公司
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