文献类型：期刊文献

英文题名：High strength, tough and self-healing chitosan-based nanocomposite hydrogels based on the synergistic effects of hydrogen bond and coordination bond

作者：Zhang, Qiongshan[1];Li, Cailing[1];Du, Xiaomei[1];Zhong, Huojiao[1];He, Zhuowei[1];Hong, Pengzhi[1];Li, Yong[1];Jing, Zhanxin[1]

机构：[1]Guangdong Ocean Univ, Coll Chem & Environm, Zhanjiang 524088, Guangdong, Peoples R China

年份：2022

卷号：29

期号：8

外文期刊名：JOURNAL OF POLYMER RESEARCH

收录：SCI-EXPANDED(收录号：WOS:000826162400003)、、EI(收录号：20223012387886)、Scopus(收录号：2-s2.0-85134397332)、WOS

基金：This work was supported financially by the Science and Technology of Zhanjiang City (2019A01006 and 2021A05049), "South Sea Scholars" Talent Funding Program (002020992012), Program for Scientic Research Start-up Funds of Guangdong Ocean University (R19010), College Student Innovation and Entrepreneurship Project (CXXL2020292 and CXXL2019299) and College Students' Science and Technology Innovation Cultivation Project of Guangdong Province-Climbing Plan (pdjh2021b0235).

语种：英文

外文关键词：Chitosan; Hydroxyapatite; Hydrogel; Toughness; Self-healing

外文摘要：In this study, we proposed a simple one-pot strategy to synthesize a fully physically cross-linked chitosan-based nanocomposite hydrogels through the construction of hydrogen bonds and metal-carboxylate coordination bonds within hydrogel networks, in which Al3+ and hydroxyapatite acted as cross-linking points. FT-IR and XPS results confirmed that chitosan-based nanocomposite hydrogels were synthesized by the non-covalent interactions. pH-sensitivity, surface morphology and mechanical properties of the synthesized hydrogels can be regulated by the compositions. The resulting optimal sample exhibited three-dimensional structure, high tensile strength (379.5 kPa), and large elongation at break (18.6 mm/mm). The non-covalent interactions served as sacrificial bonds to dissipate energy during the deformation of the hydrogels, which improved significantly the toughness of the materials. Additionally, the multiple dynamically reversible non-covalent interactions not only made the materials have fast self-recovery capacity, but also gave the materials good self-healing ability. We expect that this facile strategy of incorporating the hydrogen bonds and coordination bonds may enrich the avenue in exploration of dynamic and tunable nanocomposite hydrogels to expand their potential applications in the biomedical field.