Photothermal Stimuli-Responsive Biocomposites Based on Cross-linked Poly(L-malic acid) Reinforced with Carbon Nanotubes
作者：Qianru Wanyan, Yaxin Qiu, Juqun Xi, Suna Yin, Wenting Zhang, Defeng Wu*
關鍵字：carbon nanotubes; biocomposites; crosslinking; photothermal conversion; shape memory effect.
論文來源：期刊
具體來源：ACS Applied Polymer Materials
發表時間：2020年
ACS Applied Polymer Materials, 2020, 2, 5889-5897.
Carbon nanotubes (CNTs) have high photothermal conversion efficiency, and hence can be used to prepare light-absorbing nanocomposites with polymers. In this study, an interesting type of nanocomposites based on the biomass-derived poly(l-malic acid) (PLMA) filled with CNTs were developed. CNTs were grafted with PLMA oligomers and then participated in the crosslinking of PLMA. As-obtained biocomposites show highly improved mechanical strengths and good biocompatibility with decreased rates of degradation. The elastoplastic response was then used as a probe to detect relations between dispersion of CNTs and relaxations of crosslinking networks. As a green and light-absorbing material, the cross-linked PLMA/CNT nanocomposite possesses good photoabsorption efficiency and photothermal conversion stability. The shape memory behavior of cross-linked PLMA matrix is activated then, and the recovery process can be controlled step-by-step. Using this kind of biocomposites, the intelligent devices with programmable photothermal responses and tunable material performance can be easily fabricated.
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https://pubs.acs.org/doi/full/10.1021/acsapm.0c01107