材料科学
壳聚糖
热稳定性
极限抗拉强度
纤维素
化学工程
纳米纤维
离子液体
生物降解
离子强度
复合材料
细菌纤维素
膜
纳米技术
有机化学
水溶液
化学
生物
工程类
遗传学
催化作用
作者
Suiyi Li,Haohao Wang,Zhangmin Wan,Yang Guo,Chuchu Chen,Dagang Li,Mingwei Zhu,Yanfeng Chen
标识
DOI:10.1021/acsami.2c01118
摘要
Renewable and biodegradable natural polymeric materials are attractive candidates for replacing nonbiodegradable plastics. However, it is challenging to fabricate polysaccharide-based materials (such as cellulose and chitin) that can be used in humid or even watery environments due to their inferior stability against water. Here, a self-locking structure is constructed to develop a strong, water-resistant, and ionic conductive all-chitosan film without other additives. The densely packed self-locking structure introduces strong interactions between chitosan nanofibers, preventing the fibers from disentangling even in watery environments. The resulting film exhibits outstanding tensile strength of ∼144 MPa, superior wet strength of ∼54.3 MPa, and high ionic conductivity of 0.0012 S/cm at 10-4 M KCl, which are significantly higher than those of conventional polysaccharide-based materials and many commercially used plastics. Additionally, it also possesses outstanding flexibility, excellent thermal stability, good antimicrobial ability, and biodegradability, which make it a promising eco-friendly alternative to plastics for many potential applications, such as packaging bags, drinking straws, and ion regulation membranes.
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