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Rapid Deswelling Response of Poly(N-isopropylacrylamide) Hydrogels by the Formation of Water Release Channels Using Poly(ethylene oxide) Graft Chains
Abstract
Poly(ethylene oxide) (PEO) chains are introduced as graft chains maintaining freely mobile ends in thermo-responsive cross-linked poly( N -isopropylacrylamide) (PIPAAm) hydrogels by copolymerization of IPAAm with α-acryloyl-ω-methoxy-PEO. The deswelling response on raising the temperature of this gel above the gel phase transition temperature ( T P ) takes place within 10 min, whereas a conventionally cross-linked PIPAAm gel of the same dimensions requires 1 month for deswelling. This difference is due to the formation of water release channels within the skin layer by the hydrophilic PEO graft chains. The rapid deswelling of the grafted gel is compared with the deswelling changes of random copolymer gels composed of IPAAm and hydrophilic acrylic acid (AAc), which also accelerates gel deswelling. Deswelling is fastest in copolymers containing 1.3 wt % AAc and in grafted gels containing 13 wt % PEO. These results were interpreted as reflecting the gel structure.
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Cited by
Stimuli-reponsive polymers and their bioconjugates
GIL, E., & HUDSON, S. (2004) · Progress in Polymer Science · doi:10.1016/j.progpolymsci.2004.08.003 · Cited by 2,385
Thermosensitive sol-gel reversible hydrogels
Jeong, B., Kim, S. W., & Bae, Y. H. (2002) · Advanced Drug Delivery Reviews · doi:10.1016/s0169-409x(01)00242-3 · Cited by 1,478
Biomedical Applications of Layer‐by‐Layer Assembly: From Biomimetics to Tissue Engineering
Tang, Z., Wang, Y., Podsiadlo, P., & Kotov, N. A. (2006) · Advanced Materials · doi:10.1002/adma.200600113 · Cited by 1,302
Lutz, J. (2008) · Journal of Polymer Science Part A: Polymer Chemistry · doi:10.1002/pola.22706 · Cited by 1,245
Pulsatile drug release control using hydrogels
Kikuchi, A., & Okano, T. (2002) · Advanced Drug Delivery Reviews · doi:10.1016/s0169-409x(01)00243-5 · Cited by 600
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Metadata
- Authors
- Kaneko, Y., Nakamura, S., Sakai, K., Aoyagi, T., Kikuchi, A., Sakurai, Y., & Okano, T.
- Venue
- Macromolecules
- Publisher
- American Chemical Society (ACS)
- Published
- 1998-08-21
- Volume
- 31
- Issue
- 18
- Pages
- 6099-6105
- ISSN
- 0024-9297 (ISSN-L)
- 1520-5835
- OpenAlex
- W2057082593
- Cited by
- 346
- References
- 0
- FWCI
- 4.14
- Type
- journal article
- Language
- en
- Open access
- closed
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- CoChat. (2026). Citation check: Rapid Deswelling Response of Poly(N-isopropylacrylamide) Hydrogels by the Formation of Water Release Channels Using Poly(ethylene oxide) Graft Chains. https://app.cochat.ai/papers/10.1021/ma971899g
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- Kaneko, Y., Nakamura, S., Sakai, K., Aoyagi, T., Kikuchi, A., Sakurai, Y., & Okano, T. (1998). Rapid Deswelling Response of Poly(N-isopropylacrylamide) Hydrogels by the Formation of Water Release Channels Using Poly(ethylene oxide) Graft Chains. Macromolecules. https://doi.org/10.1021/ma971899g
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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).
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