Preparation method of functional chitosan, polyvinyl alcohol and polycaprolactam composite nanofibrous membrane

A technology of composite nanofibers and polycaprolactam, which is used in fiber processing, complete sets of equipment for the production of artificial threads, non-woven fabrics, etc., can solve the problems of high hygroscopicity, poor water resistance, low thermal stability, etc. Overcome swelling, low price effect

Active Publication Date: 2018-04-13
ANHUI UNIVERSITY OF TECHNOLOGY AND SCIENCE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But it also has obvious disadvantages, such as high hygroscopicity, poor water resistance, low thermal stability, etc.

Method used

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  • Preparation method of functional chitosan, polyvinyl alcohol and polycaprolactam composite nanofibrous membrane
  • Preparation method of functional chitosan, polyvinyl alcohol and polycaprolactam composite nanofibrous membrane
  • Preparation method of functional chitosan, polyvinyl alcohol and polycaprolactam composite nanofibrous membrane

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Experimental program
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Effect test

Embodiment 1

[0029] A preparation method of functional chitosan, polyvinyl alcohol and polycaprolactam composite nanofibrous membrane, the specific steps are as follows:

[0030] 1) Raw material preparation: place CS, PVA and PA6 solid slices in a vacuum drying oven at 50°C for 12 hours;

[0031] 2) Preparation of CS and PVA composite spinning solution: Take the above-mentioned dry CS and PVA at room temperature and add them to the acetic acid solution with a mass fraction of 36%, and stir until the CS and PVA are completely dissolved in the acetic acid solution at a speed of 500r / min , wherein, the total mass fraction of CS and PVA is 8%, and the mass ratio of CS and PVA is 1:9 to obtain a composite spinning solution of CS and PVA;

[0032] 3) Preparation of PVA and PA6 composite spinning solution: take the above-mentioned dried PVA and PA6 at room temperature and add them to a formic acid solution with a mass fraction of 88%, and stir until PVA and PA6 are completely dissolved in the for...

Embodiment 2

[0035] In this embodiment, the preparation method of functional chitosan, polyvinyl alcohol and polycaprolactam composite nanofibrous membrane is the same as in Example 1, except that in step (2), the total mass fraction of CS and PVA is 10%, and the mass fraction of CS and PVA is The ratio is 2:8; the total mass fraction of PVA and PA6 is 16% in the step (3), and the mass ratio of PVA and PA6 is 4:12; the high-voltage electrospinning condition process parameters in the step (4) are: spinneret and receiving The distance between the devices is 15cm, the flow rate of the spinning solution is 0.2mL / h, the applied voltage is 18kV, and the receiving device receives for 10h.

Embodiment 3

[0037] In this embodiment, the preparation method of functional chitosan, polyvinyl alcohol and polycaprolactam composite nanofibrous membrane is the same as in Example 1, except that the total mass fraction of CS and PVA in step (2) is 12%, and the mass fraction of CS and PVA is The ratio is 3:7; the total mass fraction of PVA and PA6 is 18% in the step (3), and the mass ratio of PVA and PA6 is 5:13; the high-voltage electrospinning condition process parameters in the step (4) are: spinneret and receiving The distance between the devices is 18cm, the flow rate of the spinning solution is 0.3mL / h, the applied voltage is 20kV, and the receiving device receives for 15h.

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Abstract

The invention discloses a preparation method of a functional chitosan, polyvinyl alcohol and polycaprolactam composite nanofibrous membrane and relates to the field of composite nanofibrous membranes.The preparation method comprises the following steps that firstly chitosan, polyvinyl alcohol and polycaprolactam are sliced and dried, and then chitosan and polyvinyl alcohol are dissolved in aceticacid to prepare a chitosan and polyvinyl alcohol composite spinning solution; polyvinyl alcohol and polycaprolactam are dissolved in formic acid to prepare a polyvinyl alcohol and polycaprolactam composite spinning solution, finally the two composite spinning solutions are subjected to high-pressure electrostatic spinning at the same time, composite fiber sediment is received, and the functionalchitosan, polyvinyl alcohol and polycaprolactam composite nanofibrous membrane is obtained. The prepared functional chitosan, polyvinyl alcohol and polycaprolactam composite nanofibrous membrane has good adsorption effect on heavy metal and is mainly applied to fields such as macromolecule filtering, enzyme immobilization and metal ion adsorption.

Description

technical field [0001] The invention belongs to the technical field of functional polymer materials, relates to the field of composite nanofiber membranes, in particular to a preparation method of functional chitosan, polyvinyl alcohol and polycaprolactam composite nanofiber membranes. Background technique [0002] With the development of industrialization, the problem of metal ions polluting water sources is becoming more and more serious. At present, the main methods for removing heavy metal ions in water are: reverse osmosis, ion exchange, electrochemical precipitation, redox, biological treatment and adsorption technology. Among them, the adsorption technology is due to the It is easy to operate, efficient, reusable, and low in cost. Due to the high specific surface area of ​​the nanofibrous membrane, more functional groups are exposed on the surface of the fiber, which increases the number of adsorption sites on the surface of the fiber, and is widely used. It is applie...

Claims

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Application Information

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IPC IPC(8): D04H1/4382D01D13/00D01D5/00
CPCD01D5/003D01D5/0069D01D5/0092D01D13/00D04H1/4382D10B2211/24D10B2321/021D10B2331/02D10B2505/04
Inventor 凤权石建军魏安静李鑫胡金燕李伟刚
Owner ANHUI UNIVERSITY OF TECHNOLOGY AND SCIENCE
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