Preparation method of polycaprolactam hollow fiber hybrid membrane

A polycaprolactam, hybrid membrane technology, applied in chemical instruments and methods, membrane technology, semi-permeable membrane separation, etc., can solve the problems of high porosity and large flux, and achieve high porosity, high flux, and low The effect of acid corrosion resistance

Inactive Publication Date: 2014-10-22
SHANDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] Aiming at the limitations of the prior art, the technical problem to be solved in the present invention is to design a preparation method of PA6 hollow fiber hybrid membrane, which can avoid the corrosion of the equipment by the original solvent system, and the prepared membrane aperture and porosity can be control, relatively few parameters need to be adjusted, high porosity, and large throughput; and the method has the characteristics of simple process, low pollution, no special requirements for equipment conditions, low cost, easy continuous preparation process, and convenient industrial application

Method used

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  • Preparation method of polycaprolactam hollow fiber hybrid membrane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Add 600g diluent N-E-O / PTSA into the dissolution tank, add 240g micron SiO while stirring 2 After the inorganic particles are dispersed in the diluent for half an hour, add 600g PA6 and 0.36g antioxidant 1076, slowly raise the temperature to 210°C, and stabilize for half an hour, then use the special spinneret for hollow fiber membranes, with white oil as the core liquid , 10°C water as a coagulation bath for spinning and forming, extracting and washing in absolute ethanol for 18 hours, then cold stretching 1.5 times and drying in the air to obtain the polycaprolactam hollow fiber hybrid membrane. Record it as (50%, 40%, 10°C).

Embodiment 2

[0028] Add 720g diluent N-E-O / PTSA to the dissolution tank, add 192g micron SiO while stirring 2 After the inorganic particles are dispersed in the diluent for half an hour, add 480g of PA6 and 0.288g of antioxidant 1076, slowly raise the temperature to 200°C, and stabilize for half an hour, then use the special spinneret for hollow fiber membranes, with white oil as the core liquid The polycaprolactam hollow fiber hybrid membrane can be prepared by spinning in water at 10°C as a coagulation bath for 18 hours, extracting and washing in absolute ethanol for 18 hours, cold stretching 1.5 times, and taking it out to dry. Recorded as (40%, 40%, 10°C).

Embodiment 3

[0030] Add 650g diluent N-E-O / PTSA to the dissolution tank, add 140g micron SiO while stirring 2 After the inorganic particles are dispersed in the diluent for half an hour, add 350g PA6 and 0.21g antioxidant 1076, slowly raise the temperature to 200°C, and stabilize for half an hour, then use the special spinneret for hollow fiber membranes, with white oil as the core liquid The polycaprolactam hollow fiber hybrid membrane can be prepared by spinning in water at 10°C as a coagulation bath for 18 hours, extracting and washing in absolute ethanol for 18 hours, cold stretching 1.5 times, and taking it out to dry. Recorded as (35%, 40%, 10°C).

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Abstract

The invention discloses a preparation method of a polycaprolactam hollow fiber hybrid membrane. The preparation method comprises the following steps: (1) drying granular polycaprolactam slices and inorganic particles in a vacuum drying oven for 6-8 hours at 100 DEG C; (2) sequentially adding 10wt%-40wt% of the inorganic particles, 30wt%-50wt% of the polycaprolactam slices and 0.006% of an antioxidant into a diluting agent in a dissolving kettle, slowly heating to about 200 DEG C, and preparing a hollow fiber primary membrane by virtue of a hollow spinning assembly; (3) after carrying out first-stage air bath and coagulating bath, curing the primary membrane, so as to obtain a hollow fiber hybrid gel membrane; (4) after extracting the hybrid gel membrane for 18 hours by virtue of ethanol or ethyl ether, carrying out cold drawing on the hybrid gel membrane by 1.5 times, and naturally airing the hybrid gel membrane, so as to obtain the hollow fiber hybrid membrane. The hollow fiber hybrid membrane prepared by virtue of the preparation method can be applied to the fields of water treatment, affinity separation and the like; the preparation method has the characteristics that the process is simple, and the continuous preparation process and the industrialized application are easy to realize.

Description

technical field [0001] The invention relates to a preparation method of a hollow fiber hybrid membrane, in particular to a preparation method of a hollow fiber membrane used for water treatment, protease purification and affinity separation, and belongs to the technical fields of water treatment and biochemical industry. Background technique [0002] PA6 is a general-purpose engineering plastic with a long history and a wide range of uses. Due to its excellent performance and good application effect, its output has maintained steady growth in the fierce competition with other engineering plastics. It was once called an epoch-making engineering plastic. Nylon has developed rapidly since its inception until the 1950s. In the 1990s, it was given special functions through modification, which promoted the development of nylon from general-purpose plastics to engineering plastics and functional plastics. PA6 has good comprehensive properties such as mechanical properties, heat re...

Claims

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Application Information

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Patent Type & AuthorityApplications(China)
IPC IPC(8): B01D71/56B01D69/08B01D67/00
Inventor姜兆辉王婧贾曌李志迎肖长发
OwnerSHANDONG UNIV OF TECH