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A kind of preparation method of silicone rubber film

A technology of silicone rubber and membrane casting liquid, which is applied in the field of silicone rubber membrane preparation, can solve the problems of affecting the service life of the membrane, the degree of bonding is not high, the separation layer and the support layer are separated, etc., to prolong the service life, ensure selectivity, The tight effect

Inactive Publication Date: 2017-05-03
广州加泰医药科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Silicone rubber is a commonly used membrane material in the field of pervaporation separation, such as polydimethylsiloxane. The prepared membranes are mainly composite membranes, but the degree of bonding between silicone rubber and existing composite materials is not high, and separation layers and The problem of support layer separation affects the service life of the membrane

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] (1) Rinse the non-woven fabric with deionized water until neutral, soak it in an aqueous solution containing 600PPM sodium hypochlorite for 30 minutes, then rinse it with sterile water, and place it in a sterile environment with the reverse side up;

[0016] (2) After the medium is sterilized, insert Acetobacter xylinum that can metabolize and produce bacterial cellulose, and culture it with shaking at 25°C for 24 hours, then filter the culture solution with a 200-mesh filter cloth under sterile conditions to remove bacterial cellulose, and the filtrate Spray evenly on the reverse side of the treated non-woven fabric, and cultivate it statically for 6 days at 25°C and 60RH% humidity. After microwave drying, it is completely immersed in the hydrolyzate of tetraethyl orthosilicate, and the pH value is adjusted with ammonia water. To 8, take it out after being sealed for 24 hours, clean it with deionized water, and then freeze-dry to obtain a modified non-woven fabric / bacte...

Embodiment 2

[0022] (1) Rinse the non-woven fabric with deionized water until neutral, soak it in an aqueous solution containing 600PPM sodium hypochlorite for 30 minutes, then rinse it with sterile water, and place it in a sterile environment with the reverse side up;

[0023] (2) After the medium is sterilized, insert Acetobacter xylinum that can metabolize and produce bacterial cellulose, and culture it with shaking at 30°C for 12 hours, then filter the culture solution with a 200-mesh filter cloth under sterile conditions to remove bacterial cellulose, and the filtrate Spray evenly on the reverse side of the treated non-woven fabric, and culture it statically for 3 days under the conditions of 30°C and 70RH% humidity. To 7, take it out after sealing for 48 hours, clean it with deionized water, and then freeze-dry to obtain a modified non-woven fabric / bacterial cellulose composite;

[0024] The medium consists of: glucose 3wt%, yeast powder 1wt%, alcohol 2wt%, pectin 0.05wt%, and the ba...

Embodiment 3

[0029] (1) Rinse the non-woven fabric with deionized water until neutral, soak it in an aqueous solution containing 600PPM sodium hypochlorite for 30 minutes, then rinse it with sterile water, and place it in a sterile environment for later use;

[0030] (2) After the culture medium is sterilized, insert Acetobacter xylinum that can metabolize and produce bacterial cellulose, culture it with shaking at 28°C for 20 hours, and then filter the culture solution with a 200-mesh filter cloth under sterile conditions to remove the bacterial cellulose, and the filtrate Spray evenly on the treated non-woven fabric, and culture it statically for 5 days under the conditions of 28°C and 65RH% humidity. 7.5, take it out after sealing for 40 hours, clean it with deionized water, and then freeze-dry to obtain a modified non-woven fabric / bacterial cellulose composite;

[0031] The medium consists of: glucose 2wt%, yeast powder 0.8wt%, alcohol 3wt%, pectin 0.04wt%, and the balance is water;

...

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PUM

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Abstract

The invention discloses a preparation method of a silicone rubber membrane. The method comprises the following steps: (1) washing a non-woven fabric to a neutral stance for later use; (2) inoculating acetobacter xylinum on the reverse side of the non-woven fabric, and forming a non-woven fabric / bacterial cellulose complex through stationary culture, microwave drying, hydrophobic modification and freeze-drying; (3) pouring a silicone rubber membrane casting solution onto the surface of the non-woven fabric / bacterial cellulose complex for casting, and obtaining the silicone rubber membrane after drying. According to the method provided by the invention, fermentation is directly carried out on the reverse side of the non-woven fabric by using microorganism, and the bacterial cellulose is implanted into the nano-apertures of the non-woven fabric, and is compounded with silicone rubber after being subjected to SiO2 hydrophobic modification, the bonding is tight, the problem of detachment is unlikely to happen, and the service life of the membrane is prolonged. Meanwhile, the bacterial cellulose is subjected to the hydrophobic modification, so that the selectivity of the silicone rubber membrane to organic molecule is guaranteed.

Description

technical field [0001] The invention relates to a preparation method of a silicon rubber membrane, which is suitable for a pervaporation separation process and belongs to the field of pervaporation membrane separation. Background technique [0002] Bacterial cellulose (BC) is a new type of nano-biological material with properties such as high crystallinity, high tensile strength and high elastic modulus, and is widely used. At present, bacterial cellulose has been applied in the fields of food, papermaking, biomedical materials, sound vibration membrane and sewage treatment, etc., and has become one of the research hotspots in the world, but the application in the pervaporation industry is still in its initial stage. [0003] Silicone rubber is a commonly used membrane material in the field of pervaporation separation, such as polydimethylsiloxane. The prepared membranes are mainly composite membranes, but the degree of bonding between silicone rubber and existing composite ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D71/70B01D67/00B01D61/36
Inventor 吴鑫欣
Owner 广州加泰医药科技有限公司