Silicone rubber with permanent hydrophilic property on surface, preparing method and use thereof

A silicone rubber and hydrophilic technology, applied in optics, optical components, instruments, etc., can solve the problems of weakened optical transparency and high price, and achieve the effects of perfect biocompatibility, low cost, and easy preparation

Inactive Publication Date: 2005-02-23
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, reduced optical clarity and high price are its weaknesses

Method used

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  • Silicone rubber with permanent hydrophilic property on surface, preparing method and use thereof
  • Silicone rubber with permanent hydrophilic property on surface, preparing method and use thereof
  • Silicone rubber with permanent hydrophilic property on surface, preparing method and use thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] Embodiment 1. the preparation that contains the addition type two-component silicone rubber of Si-H bond

[0055] Taking Dow Corning Sylgard 184 silicone rubber as an example, component A (mainly composed of vinyl-containing polydimethylsiloxane) and B component (mainly composed of silicon hydrogen-containing polymethylsiloxane) Take out 30g of the two components according to the mass ratio of 10:1; 7:1; 4:1; 3:1; 2:1, mix together and stir, so that the two parts are fully mixed. Pour it into a container with a horizontal surface (such as a glass Petri dish), and vacuum to remove air bubbles until it is transparent and free of air bubbles. React at 100°C for 0.5 hour to obtain a colorless and transparent cured silicone rubber. Carefully peel off the silicone rubber, cut into small pieces, and set aside. ATR-FTIR spectroscopy studies (see figure 1 , 2): at 1110-1000cm -1 The vibration peak of Si-O-Si bond appeared between 1255 and 800cm -1 The vibration peak of Si-C...

Embodiment 2

[0056] Embodiment 2. the preparation that contains the addition type two-component silicone rubber of Si-H bond

[0057] Mix the two components A and B according to the ratio of 3:1, follow the operation steps of Example 1, and keep at 150° C. for 0.2 hours to obtain a transparent cured silicone rubber. Take out a small amount of cured silicone rubber and do ATR-FTIR spectrum. ATR-FTIR infrared spectrum at 1110-1000cm -1 The vibration peak of Si-O-Si bond appeared between 1255 and 800cm -1 The vibration peak of Si-C bond appeared at 2160cm -1 The Si-H bond vibration peak appeared at , indicating that there were still Si-H bonds not involved in the reaction.

Embodiment 3

[0058] Embodiment 3. the preparation that contains the addition type two-component silicone rubber of Si-H bond

[0059] Mix the two components A and B at a ratio of 2:1, and react at 80° C. for 0.5 hour according to the operation steps of Example 1 to obtain a transparent cured silicone rubber. Do ATR-FTIR spectroscopy. ATR-FTIR infrared spectrum at 1110-1000cm -1 The vibration peak of Si-O-Si bond appears between them. at 1255 and 800cm -1 The vibration peak of the Si-C bond appears at . 2160cm -1 There is a strong Si-H bond vibration peak. Indicating that the existing Si-H bond did not participate in the reaction at this time.

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Abstract

A silicone rubber with durable hydrophilic surface is produced by reacting hydro-silicon bonds in surface with polyethylene glycol monoallyl ether, alpha-allyl-omiga-methyl-polyethylene clycol or polyethylene glycoldiqallyl ether to form polyglycol modified silicone rubber with Si-C covalent bonds. The average value of molecular weights is 1000 - 8000. The surface modified PDMS is improved in compactness, uniform and stability of hydrophilic layer with polyglycol derivatives combined with silicone rubber. The surface does not adsorb protein and is of perfect biocompatible, so that it can be used in bio-medical purposes, eg, lenses of contact spectacles. Its manufacture and uses are related here.

Description

technical field [0001] The present invention relates to a kind of polyethylene glycol surface-modified silicone rubber, in particular to allyl polyethylene glycol surface-modified silicone rubber and its preparation method, and the present invention also relates to polyethylene glycol surface-modified silicone rubber of the present invention Contact lenses made of silicone rubber. Background technique [0002] [0003] Silicone rubber (silicone) is composed of Si-O chain skeleton, and its side chain groups R and R' can be selected according to the physical properties required by the material. Depending on the size of the polymer chain skeleton and the side chain groups, silicone rubber can be gel-like, liquid-like, or rubber-like. The side-chain groups include methyl, hydrogen, phenyl, vinyl, or hydroxyl. Silicon hydrogen bonds, vinyl groups, or hydroxyl groups can be used to react with other molecules to modify the physical and chemical properties of silicone rubber. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G77/38G02C7/02
Inventor 肖守军郭东杰
Owner NANJING UNIV
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