期刊
ACS APPLIED POLYMER MATERIALS
卷 2, 期 4, 页码 1672-1681出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsapm.0c00110
关键词
poly(L-malic acid); cross-linking; shape memory effect; solvent-responsive capacity; visual discrimination; biocompatibility
资金
- National Natural Science Foundation of China [51573156]
- Research Innovation Program for the Graduates of Yangzhou University [XKYCX18_046]
A biomass-derived and biocompatible poly(L-malic acid) (PMA) based material with shape memory effect (SME) was developed in this work. 1,8-Octanediol was used as the cross-linker to construct cross-linking networks with hydrophilic backbone chain of PMA, tuning the density of networks and their swelling capacities by controlling -COOH/- OH ratios. The solvent-induced SME of as-obtained cross-linked PMAs was activated under mild conditions in this way. Using the shape recovery levels of U-shaped samples as the probes, the mixed methanol/ethanol/water systems with various ratios could be easily discriminated because the cross-linked PMAs show different sensing capacities to different components. The mechanisms were then studied in terms of the solvent molecule-polymer interactions. This work provides an interesting approach of visible discrimination of the solvents with similar structures, or their mixtures with various ratios, and also opens applications of biocompatible shape memory polymers in biomedical and chemical industries.
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