Effect of inorganic material surface chemistry on structures and fracture behaviours of epoxy resin.

Autor: Miyata T; Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Sendai, Miyagi, 980-8577, Japan., Sato YK; Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Sendai, Miyagi, 980-8577, Japan., Kawagoe Y; Department of Aerospace Engineering, Graduate School of Engineering, Tohoku University, 6-6-01 Aramaki Aza Aoba, Aoba-ku, Sendai, Miyagi, 980-8579, Japan. kawagoe@tohoku.ac.jp., Shirasu K; Department of Finemechanics, Graduate School of Engineering, Tohoku University, 6-6-01 Aramaki Aza Aoba, Aoba-ku, Sendai, Miyagi, 980-8579, Japan. keiichi.shirasu.c1@tohoku.ac.jp., Wang HF; Department of Chemical and Materials Engineering, National Central University, No. 300, Zhongda Rd., Zhongli Dist., Taoyuan City, 320317, Taiwan., Kumagai A; Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Sendai, Miyagi, 980-8577, Japan., Kinoshita S; Department of Applied Chemistry, Graduate School of Engineering, Tohoku University, 6-6-07 Aramaki Aza Aoba, Aoba-ku, Sendai, Miyagi, 980-8579, Japan., Mizukami M; New Industry Creation Hatchery Center, Tohoku University, Sendai, Miyagi, 980-0845, Japan., Yoshida K; Nanostructures Research Laboratory, Japan Fine Ceramics Center, Nagoya, Aichi, 456-8587, Japan., Huang HH; Nanostructures Research Laboratory, Japan Fine Ceramics Center, Nagoya, Aichi, 456-8587, Japan., Okabe T; Department of Aerospace Engineering, Graduate School of Engineering, Tohoku University, 6-6-01 Aramaki Aza Aoba, Aoba-ku, Sendai, Miyagi, 980-8579, Japan.; Research Center for Structural Materials, Polymer Matrix Hybrid Composite Materials Group, National Institute for Materials Science, 1-2-1 Sengen, Tsukuba, Ibaraki, 305-0047, Japan.; Department of Materials Science and Engineering, University of Washington, BOX 352120, Seattle, WA, 98195, USA., Hagita K; Department of Applied Physics, National Defense Academy, Yokosuka, Kanagawa, 239-0811, Japan., Mizoguchi T; Institute of Industrial Science, The University of Tokyo, Meguro-ku, Tokyo, 153-8505, Japan., Jinnai H; Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Sendai, Miyagi, 980-8577, Japan. hiroshi.jinnai.d4@tohoku.ac.jp.
Jazyk: angličtina
Zdroj: Nature communications [Nat Commun] 2024 Mar 08; Vol. 15 (1), pp. 1898. Date of Electronic Publication: 2024 Mar 08.
DOI: 10.1038/s41467-024-46138-6
Abstrakt: The mechanisms underlying the influence of the surface chemistry of inorganic materials on polymer structures and fracture behaviours near adhesive interfaces are not fully understood. This study demonstrates the first clear and direct evidence that molecular surface segregation and cross-linking of epoxy resin are driven by intermolecular forces at the inorganic surfaces alone, which can be linked directly to adhesive failure mechanisms. We prepare adhesive interfaces between epoxy resin and silicon substrates with varying surface chemistries (OH and H terminations) with a smoothness below 1 nm, which have different adhesive strengths by ~13 %. The epoxy resins within sub-nanometre distance from the surfaces with different chemistries exhibit distinct amine-to-epoxy ratios, cross-linked network structures, and adhesion energies. The OH- and H-terminated interfaces exhibit cohesive failure and interfacial delamination, respectively. The substrate surface chemistry impacts the cross-linked structures of the epoxy resins within several nanometres of the interfaces and the adsorption structures of molecules at the interfaces, which result in different fracture behaviours and adhesive strengths.
(© 2024. The Author(s).)
Databáze: MEDLINE
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