TY - JOUR
T1 - Poly[oligo(2-ethyl-2-oxazoline) methacrylate] as a surface modifier for bioinertness
AU - Hong, Jin Hyeok
AU - Totani, Masayasu
AU - Kawaguchi, Daisuke
AU - Yamada, Norifumi L.
AU - Matsuno, Hisao
AU - Tanaka, Keiji
N1 - Funding Information:
Acknowledgements We are grateful for support from the JST-Mirai Program (JPMJMI18A2) (KT), JSPS KAKENHI Grant-in-Aids for Scientific Research (B) (JP20H02790) (KT) and (B) (JP18H02037) (HM), and for Early-Career Scientists (JP18K16990) (MT). The NR measurements were approved by the Neutron Scattering Program Advisory Committee of IMSS, KEK with Proposal Nos. 2018B0287, 2019A0255, 2019B0269, 2019B0365, 2020A0272, and 2017L2501.
Publisher Copyright:
© 2021, The Author(s), under exclusive licence to The Society of Polymer Science, Japan.
PY - 2021/5
Y1 - 2021/5
N2 - Surface modification of versatile polymeric materials without changing their bulk properties is one of the essential techniques for regulating their physical and chemical characteristics, and this technique can improve the functions of materials. In this study, a bottlebrush-type poly[oligo(2-ethyl-2-oxazoline) methacrylate] (P[O(Ox)nMA]) (n = 7 and 19) was synthesized as a surface modifier. This compound was mixed into poly(methyl methacrylate) (PMMA) as a matrix (PMMA/P[O(Ox)nMA]) with a weight ratio of 15%, and the aggregation state in the surface region was examined under air and aqueous environments via atomic force microscopy, contact angle measurement, angular-dependent X-ray photoelectron spectroscopy, and neutron reflectivity. The surface of the PMMA/P[O(Ox)nMA] films was flat at the subnanometer level and covered with the PMMA-rich phase. However, once the films contacted water, the surface was reorganized due to the migration of P[O(Ox)nMA]. The extent of the surface segregation was more remarkable for P[O(Ox)7MA] than P[O(Ox)19MA] due to the entropic factor. Concurrently, NIH3T3 fibroblast adhesion and serum protein adsorption on the film were more strongly suppressed for P[O(Ox)7MA] than P[O(Ox)19MA] because it formed a thicker diffused interface in the film with water.
AB - Surface modification of versatile polymeric materials without changing their bulk properties is one of the essential techniques for regulating their physical and chemical characteristics, and this technique can improve the functions of materials. In this study, a bottlebrush-type poly[oligo(2-ethyl-2-oxazoline) methacrylate] (P[O(Ox)nMA]) (n = 7 and 19) was synthesized as a surface modifier. This compound was mixed into poly(methyl methacrylate) (PMMA) as a matrix (PMMA/P[O(Ox)nMA]) with a weight ratio of 15%, and the aggregation state in the surface region was examined under air and aqueous environments via atomic force microscopy, contact angle measurement, angular-dependent X-ray photoelectron spectroscopy, and neutron reflectivity. The surface of the PMMA/P[O(Ox)nMA] films was flat at the subnanometer level and covered with the PMMA-rich phase. However, once the films contacted water, the surface was reorganized due to the migration of P[O(Ox)nMA]. The extent of the surface segregation was more remarkable for P[O(Ox)7MA] than P[O(Ox)19MA] due to the entropic factor. Concurrently, NIH3T3 fibroblast adhesion and serum protein adsorption on the film were more strongly suppressed for P[O(Ox)7MA] than P[O(Ox)19MA] because it formed a thicker diffused interface in the film with water.
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U2 - 10.1038/s41428-020-00459-7
DO - 10.1038/s41428-020-00459-7
M3 - Article
AN - SCOPUS:85099588982
SN - 0032-3896
VL - 53
SP - 643
EP - 653
JO - Polymer Journal
JF - Polymer Journal
IS - 5
ER -