壳聚糖
膜
聚磷酸盐
生物相容性
表面改性
止血
化学工程
聚电解质
材料科学
化学
纳米技术
生物医学工程
聚合物
外科
复合材料
有机化学
生物化学
磷酸盐
工程类
医学
作者
Chengkun Liu,Chang Liu,Zhuang Shi,Wei Lü,Zhiyuan Liu,Shihai Liu,Xiaojuan Wang,Xiaoqiang Wang,Fang Huang
标识
DOI:10.1016/j.carbpol.2022.120360
摘要
This work describes a hemostatic membrane system (or surface coating) based on spray-assisted layer-by-layer electrostatic assemblies of oppositely charged polyphosphate (polyP) and chitosan (Cs). The as-prepared membrane formed a robust micro-stratified porous structure with high flexibility. Both blood clotting test and rodent hepatic severe hemorrhage model revealed the excellent hemostatic performance of the membrane system, benefitting from the robust assembly and synergistic effect of polyP/Cs as well as membrane surface chemistry. Compared to Cs-topped membrane surface, polyP-sprayed one exhibited further improved hemostatic effect via promoting fibrin formation. Besides, comprehensive in vitro and in vivo evaluations demonstrated good biocompatibility and biodegradability of the membrane. The present approach that integrated the hemostasis-stimulating capability of polyP/Cs with facile spraying method is highly scalable and flexible, which is envisioned to be adapted readily for other hemostatic polyelectrolytes and surface functionalization of diverse existing hemostatic products on demand.
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