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US 2010/0063237 A1Published application
Hydrophilic Surface Modification of Polydimethylsiloxane
AssigneeUtah State University
InventorsHarshil Dhruv, David Britt
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Abstract
A method for the preparation of hydrophilic elastomers involves the synthesis of polydimethylsiloxane with tunable hydrophilic surface properties. An elastomeric monolith with desired hydrophilic properties is produced by combining a polyethylene oxide polymeric surfactant additive with a PDMS base and curing agent during polymerization. The surfactant chain segment lengths are varied to control the hydrophobic/hydrophilic balance.
Claims6
A process for synthesizing hydrophilic polydimethylsiloxane elastomer comprising:
- mixing a base comprising 30 to 60 weight percent dimethylvinylated and trimethylated silica, 1 to 5 weight percent tetra(trimethylsiloxy) silane, and balance dimethyl siloxane, dimethylvinyl-terminated;
- with a curing agent comprising 40 to 70 weight percent dimethyl methylhydrogen siloxane, 15 to 40 weight percent dimethyl siloxane dimethylvinyl-terminated, 10 to 30 weight percent dimethylvinylated and trimethylated silica, and 1 to 5 weight percent tetramethyl tetravinyl cyclotetrasiloxane;
- adding a surfactant;
- cooling the mixture to a prescribed temperature for a period of time to allow surface segregation of said polymeric surfactant additive;
- and
- curing the mixture at an elevated temperature for a period of time.
3 more elements
Dependencies are inferred from the claim text.