Polydimethylsiloxane with initiator on surface and its preparation method and use

A technology of polydimethylsiloxane and dimethylmethylvinylsiloxane, which is applied in the field of materials, and achieves the effect of simple method and wide application

Active Publication Date: 2008-09-17
SUZHOU SIJU BIOMATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, so far, there are no reports in the literature of alternative PDMS materials that can satisfy both the main body properties (mainly mechanical properties) and surface properties (biocompatibility).

Method used

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  • Polydimethylsiloxane with initiator on surface and its preparation method and use
  • Polydimethylsiloxane with initiator on surface and its preparation method and use
  • Polydimethylsiloxane with initiator on surface and its preparation method and use

Examples

Experimental program
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Effect test

Embodiment 1

[0021] Embodiment 1, prepare the iPDMS of 1% initiator density

[0022] according to figure 1 In the method shown, the polymer precursor A poly(dimethyl-methylvinylsiloxane) poly(dimethyl-methylvinylsiloxane), the cross-linking agent B poly(dimethyl-methylvinylsiloxane) with olefin end Alkane) vinyl-endcapped poly(dimethyl-methylvinylsiloxane), initiator C2-bromo-2-methylpropionate 10-undecenyl ester (10-undecenyl 2-bromo-2-methylpropionate) by weight ratio 10: 1: 4 mixed and left for 24 hours to form an elastomer (elastomer), that is, to obtain the polydimethylsiloxane iPDMS with an initiator on the surface of the present invention, through a surface chemical analyzer (X-ray photoelectronspectroscopy, XPS) Determination, such as figure 2 As shown, the iPDMS surface contains 10-undecenyl 2-bromo-2-methylpropionate immobilized by covalent bonds at a density of 1% at an atomic concentration (At%). Compared with ordinary PDMS, the initiators of the present invention are distrib...

Embodiment 2

[0023] Example 2, using the iPDMS prepared in Example 1 to prepare oligoethylene glycol methacrylate film

[0024] Application of SI-ATRP to iPDMS for controllable surface modification. Put iPDMS in a 100mL glass bottle for anaerobic treatment (vacuumize and fill with nitrogen). At the same time, the reaction liquid containing the reaction liquid, the monomer, and the catalyst containing the catalytic amount is prepared. The reaction solution was configured according to the following ratio: a mixture of water and methanol (15mL, the volume ratio of water and methanol was 1:2), and monomer oligoethylene glycol methacrylate ((CH 2 =CH)CH 3 COO(CH 2 CH 2 O) 12 CH 2 COOH) (8mmol, 0.35M), adding catalyst, CuBr (36mg, 0.25mmol) and bipyridyl (78mg, 0.5mmol) configuration, it was a dark red liquid, stored in an inert gas.

[0025] The reaction solution was transferred to a glass bottle containing iPDMS under the protection of an inert gas. The reaction was started and carried ...

Embodiment 3

[0026] Example 3, using the iPDMS prepared in Example 1 to prepare 1H, 1H, 2H, 2H-perfluorodecyl methacrylate (FMA) membrane

[0027] Application of SI-ATRP to iPDMS for controllable surface modification. Put iPDMS in a 100mL glass bottle for anaerobic treatment (vacuumize and fill with nitrogen). At the same time, the reaction liquid containing the reaction liquid, the monomer, and the catalyst containing the catalytic amount is prepared. The reaction solution is dichloromethane, and monomer 1H, 1H, 2H, 2H-perfluorodecyl methacrylate (FMA) (8mmol, 0.35M), adding catalyst, CuBr (36mg, 0.25mmol) and bipyridine (78mg, 0.5mmol) configuration Formed as a dark red liquid, stored in an inert gas.

[0028] The reaction solution was transferred to a glass bottle containing iPDMS under the protection of an inert gas. The reaction was started and carried out at 20°C for 24 hours; the iPDMS was taken out, washed with methanol and deionized water, and dried under nitrogen flow to obtain...

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Abstract

The invention relates to polydimethylsiloxane which is provided with an initiator at the surface, and is the silicon-hydrogen bonding cross-linked polydimethylsiloxane, of which the surface contains 0.01 to 1At percent 2-bromine-2-methyl propioric acid 10-undecene ester. The material is formed by mixing a polymer precursor, a cross-liner and the initiator with olefinic end in the weight ratio of 10: 1: 4-0.01 and placing for 6 to 24 hours. The polydimethylsiloxane with the initiator at the surface which is provided by the invention further modifies a function layer on the surface by triggering the polymerization reaction on the surface, so the polydimethylsiloxane can be applied on biocompatible, organic solvent compatible and thermal sensitive materials. The invention uses the simple and convenient method to realize the universal, permanent, diverse and functional surface modified polydimethylsiloxane.

Description

technical field [0001] The invention belongs to the field of materials, and in particular relates to a polydimethylsiloxane with an initiator on the surface and a preparation method thereof, and further modifying it for application in biocompatibility, organic solvent compatibility, and thermal (environmental) sensitive materials. Background technique [0002] Since polydimethylsiloxane (Polydimethylsiloxane, hereinafter referred to as PDMS) has excellent properties such as non-toxicity, transparency, elasticity, and chemical inertness, PDMS has become an ), soft lithography (soft lithography) and unconvertional nanolithography (unconverntional nanolithography) and other application fields, in addition, PDMS is also widely used in aerospace, electronics, medical equipment and other industrial fields. In order to better play the best function of PDMS-based devices and further promote the application of PDMS, it is generally necessary to modify the surface of PDMS. The exist...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G77/38C08G77/20
CPCC08F283/124C08F4/00C08F4/10C08F283/12C08F291/04C08F2438/01C08G77/20C09D183/04C08F220/24C08L83/00C08F220/286
Inventor 马雄明
Owner SUZHOU SIJU BIOMATERIALS
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