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A kind of water-emulsified polydimethylsiloxane functional sponge and its preparation method and application

A dimethylsiloxane, water emulsification technology, applied in chemical instruments and methods, separation methods, liquid separation and other directions, can solve the problems of uneven pores, small modules, and easy particle aggregation of functional sponges, and achieve adsorption. The effect of fast speed, high adsorption capacity and simple synthesis process

Active Publication Date: 2020-07-24
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The present invention solves the problems in the prior art that the pore-causing template particles of polydimethylsiloxane functional sponges are easy to coagulate and form, and the functional sponges formed by volatile organic solvents have uneven pores, complicated operations, and small modules, which are not conducive to large-scale production. technical problem

Method used

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  • A kind of water-emulsified polydimethylsiloxane functional sponge and its preparation method and application
  • A kind of water-emulsified polydimethylsiloxane functional sponge and its preparation method and application
  • A kind of water-emulsified polydimethylsiloxane functional sponge and its preparation method and application

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Embodiment 1

[0040] The preparation of embodiment 1 sample is carried out as follows:

[0041] First, clean the mold and dry it for later use. The preparation process is as figure 1 As shown, first weigh 5 g of PDMSSylgard component A and component B according to the mass ratio of 10:1 and pour it into a beaker, and then weigh 7.5 g of paraffin oil and add it, and stir it with a glass rod for about 2 minutes to ensure uniform mixing; then Add 40g of water drop by drop, stir with a glass rod while adding water until it is completely emulsified, and then pour it into the mold. After standing at room temperature for 6 hours, it was placed in a drying oven at 65° C. for 4 hours to cure. After demoulding, the obtained product was ultrasonically cleaned several times with absolute ethanol and ultrapure water to remove residual paraffin oil. Finally, place it in a drying oven at 100°C to dry and remove water for 6 hours to obtain a three-dimensional porous PDMS sponge. In the present inventio...

Embodiment 2

[0043] The preparation of embodiment 2 samples is carried out as follows:

[0044] First, clean the mold and dry it for later use. Weigh 5 g of PDMS Sylgard component A and component B according to the mass ratio of 10:1 and pour it into a beaker, and add 1 g of paraffin oil into it, and stir it with a glass rod for about 2 minutes to ensure uniform mixing; then add 19 g of water drop by drop , stir with a glass rod while adding water until fully emulsified, then pour it into molds. After standing at room temperature for 6 hours, it was placed in a drying oven at 65° C. for 4 hours to cure. After demoulding, the obtained product was ultrasonically cleaned several times with absolute ethanol and ultrapure water to remove residual paraffin oil. Finally, place it in a drying oven at 100°C to dry and remove water for 6 hours to obtain a three-dimensional porous PDMS sponge.

Embodiment 3

[0046] The preparation of embodiment 3 sample is carried out as follows:

[0047] First, clean the mold and dry it for later use. According to the mass ratio of 10:1, weigh 5g of PDMS Sylgard component A and component B into a beaker, and add 2g of paraffin oil into the beaker, stir well with a glass rod for about 2min to ensure uniform mixing; then add 22g of water drop by drop , stir with a glass rod while adding water until fully emulsified, then pour it into molds. After standing at room temperature for 6 hours, it was placed in a drying oven at 65° C. for 4 hours to cure. After demoulding, the obtained product was ultrasonically cleaned several times with absolute ethanol and ultrapure water to remove residual paraffin oil. Finally, place it in a drying oven at 100°C to dry and remove water for 6 hours to obtain a three-dimensional porous PDMS sponge.

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Abstract

The invention relates to a water-emulsified polydimethylsiloxane functional sponge, a preparation method and application thereof. The preparation method includes: mixing a prepolymer A of polydimethylsiloxane with a curing agent B evenly, then adding an organic solvent, then adding water dropwise, at the same time performing stirring, then conducting standing for preliminary curing; and carrying out heating curing, and removing the organic solvent and water, thus obtaining the water-emulsified polydimethylsiloxane functional sponge. The functional sponge prepared by the method provided by theinvention has the advantages of large oil absorption ratio, fast oil absorption rate, recyclable use, high porosity, adjustable thickness and the like, can be applied to separation of oil and non-polar organic solvent in water, and has great application value in oil leakage emergency treatment, oil-water mixture separation treatment and other fields.

Description

technical field [0001] The invention relates to the field of preparation of novel functional materials, more specifically, to a preparation method for efficiently synthesizing water-emulsified polydimethylsiloxane functional sponge. Background technique [0002] Oil spills and waste oil have caused severe environmental pollution and harmed human health. Therefore, great efforts have been spent on developing an adsorbent material for oil-water separation with strong selectivity and high absorption capacity. However, most of the existing materials have the problems of low utilization rate, poor absorption capacity and weak mechanical properties, and the preparation of these materials has the problems of long time-consuming, complicated process and high price, which limits the practical application in emergency situations. application. Polydimethylsiloxane (PDMS) is a kind of polymer silicone rubber, which has good stability, elasticity, compatibility and easy processing, and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J9/28B01D17/022C08L83/04
CPCB01D17/0202C08J9/28C08J2383/04
Inventor 刘笔锋张雷成冯晓均杜伟马朋陈鹏
Owner HUAZHONG UNIV OF SCI & TECH
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