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Thermoresponsive comb-shaped copolymer-Si(1 0 0) hybrids for accelerated temperature-dependent cell detachment

Paper ID Volume ID Publish Year Pages File Format Full-Text
11531 747 2006 10 PDF Available
Title
Thermoresponsive comb-shaped copolymer-Si(1 0 0) hybrids for accelerated temperature-dependent cell detachment
Abstract

Well-defined comb-shaped copolymer-Si(1 0 0) hybrids were prepared, via successive surface-initiated atom transfer radical polymerizations (ATRPs) of glycidyl methacrylate (GMA) and N-isopropylacrylamide (NIPAAm), for accelerated cell detachment at a lower temperature. The Si–C bonded comb copolymer consisted of a well-defined (nearly monodispersed) poly(glycidyl methacrylate) (P(GMA)) main chain, a well-defined NIPAAm polymer (P(NIPAAm) block, and well-defined P(NIPAAm) side chains. The ring opening reaction of epoxy groups of the P(GMA) main chain with 2-chloropropionic acid resulted in the immobilization of the α-chloroester groups (the ATRP initiators for the NIPAAm side chains) and the concomitant formation of hydroxyl groups. P(NIPAAm) acted as the thermoresponsive side chains of the comb copolymer for control of cell adhesion and detachment, while the P(GMA) main chain with hydroxyl groups provided a local hydrophilic microenvironment. The unique microstructure of the comb copolymer brushes facilitated cell recovery at 20 °C (below the lower critical solution temperature (LCST) of P(NIPAAm)) without restraining cell attachments and growth at 37 °C. The accelerated detachment of cells indicated that the underlying hydrophilic environment of the comb copolymer brushes contributed to speedy hydration of the P(NIPAAm) segments below the LCST. The thermoresponsive comb copolymer-Si(1 0 0) hybrids are potentially useful as adhesion modifiers for cells in silicon-based biomedical devices.

Keywords
H-terminated Si(1 0 0); Poly(N-isopropylacrylamide); ATRP; Poly(glycidyl methacrylate); Cell adhesion; Thermoresponsive
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Thermoresponsive comb-shaped copolymer-Si(1 0 0) hybrids for accelerated temperature-dependent cell detachment
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Publisher
Database: Elsevier - ScienceDirect
Journal: Biomaterials - Volume 27, Issue 8, March 2006, Pages 1236–1245
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us