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Nano filtering membrane containing silk fibroin and preparation method thereof

A nanofiltration membrane and silk fibroin technology, which is applied to the nanofiltration membrane containing silk fibroin and the field of preparation thereof, can solve the problems of poor support performance, inability to satisfy the filtering membrane, low membrane strength, etc. The effect of high membrane and spinning efficiency and low equipment requirements

Active Publication Date: 2015-04-01
汤氏(湖州)商业管理有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the membrane obtained by this method also has some shortcomings: 1. Due to the characteristics of silk, the strength of the obtained membrane is low and the supporting performance is poor; 2. It cannot meet the requirements of the filter membrane

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A method for preparing a nanofiltration membrane containing silk fibroin, comprising the following steps: (1), putting silk into water, boiling and degumming for 20 minutes, and filtering to obtain coarse silk fibroin;

[0025] (2), put the obtained silk fibroin crude material into the calcium chloride solution with a mass fraction of 35% and a pH of 7.1 boiled at a ratio of 1:8% (W / V), and dissolve 3mim to obtain silk fibroin primary solution;

[0026] (3) Desalting the obtained initial silk fibroin solution with a hollow fiber ultrafiltration membrane to obtain a silk fibroin solution with a concentration of 65%;

[0027] (4), adding carbon nanospheres with a diameter of 5 nm to the obtained silk fibroin liquid, and ultrasonically dispersing evenly to obtain a spinning liquid;

[0028] (5) Electrospinning the obtained spinning solution with a receiving distance of 20cm, a needle inner diameter of 0.1mm, a solution flow rate of 1.0mL / h, and a voltage of 10v to obtain ...

Embodiment 2

[0032] A method for preparing a nanofiltration membrane containing silk fibroin, comprising the following steps: (1), putting silk into water or a sodium carbonate solution with a mass fraction of 6%, boiling and degumming for 10 minutes, and filtering to obtain coarse silk fibroin ;

[0033] (2), put the obtained silk fibroin crude material into the calcium chloride solution with a mass fraction of 55% and a pH of 7.3 boiled at a ratio of 1:6% (W / V), and dissolve 4mim to obtain silk fibroin primary liquid;

[0034] (3) Desalting the obtained initial silk fibroin solution with a hollow fiber ultrafiltration membrane to obtain a silk fibroin solution with a concentration of 55%;

[0035] (4) Add carbon nanospheres with a diameter of 6nm to the obtained silk fibroin liquid, and disperse them evenly with ultrasonic waves to obtain a spinning liquid;

[0036] (5) Electrospinning the obtained spinning solution with a receiving distance of 22cm; a needle inner diameter of 0.5mm; a...

Embodiment 3

[0039] A method for preparing a nanofiltration membrane containing silk fibroin, comprising the following steps: (1), putting silk into water or a sodium carbonate solution with a mass fraction of 8%, boiling and degumming for 15 minutes, and filtering to obtain coarse silk fibroin ;

[0040] (2), the obtained silk fibroin crude material is put into the boiling calcium chloride solution with a mass fraction of 40% and a pH of 7.0 at a ratio of 1:10% (W / V), and dissolves 5mim to obtain silk fibroin primary solution;

[0041] (3) Desalting the obtained initial silk fibroin solution with a hollow fiber ultrafiltration membrane to obtain a silk fibroin solution with a concentration of 60%;

[0042] (4), adding carbon nanotubes with a diameter of 10nm to the obtained silk fibroin liquid, and ultrasonically dispersing evenly to obtain a spinning liquid;

[0043] (5) Electrospinning the obtained spinning solution with a receiving distance of 21cm; a needle inner diameter of 0.3mm; ...

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Abstract

The invention relates to a nano filtering membrane containing silk fibroin consisting of complex fibers formed by silk fibroin and nano carbon, wherein the membrane contains 70-95wt% of silk fibroin and 3-30wt% of carbon nanospheres in unit area, the filtering membrane is 0.05-5 microns thick, has high specific area of fiber, strong adsorption effect and high strength, and is durable. The preparation method of the nano filtering membrane comprises the following steps: (1) putting silk into a sodium carbonate solution, boiling for degumming, and filtering to obtain coarse silk fibroin; (2) putting the obtained coarse silk fibroin into a calcium chloride solution for dissolution, thus obtaining an initial liquid of silk fibroin; (3) desalting the obtained initial liquid of silk fibroin to obtain a silk fibroin fluid; (4) adding carbon nanospheres into the obtained silk fibroin fluid, and performing ultrasonic dispersion uniformly to obtain a spinning solution; and (5) performing electrostatic spinning on the obtained spinning solution to obtain the nano filtering membrane.

Description

technical field [0001] The invention relates to the technical field of water filtration, in particular to a nanometer filtration membrane containing silk fibroin and a preparation method thereof. Background technique [0002] Silk is a natural protein with excellent properties. As long as it is composed of sericin and silk fibroin, silk fibroin is the main component, accounting for 70-80% of the weight of silk protein. The use of silk fibroin has always been the As silk and clothing, in order to further improve the utilization value of silk fibroin, in recent years, research on silk fibroin in other fields has gradually increased, one of which is the research on silk fibroin in the field of membranes, such as the patent number CN103341209 A Chinese invention patent published on October 9, 2013 discloses a silk fibroin nanofiber film and its preparation method. Natural silk is used as the main raw material. Fluoroisopropanol is dissolved to form a spinning solution, and a si...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D69/08B01D71/74B01D67/00
Inventor 张丽明
Owner 汤氏(湖州)商业管理有限公司
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