Transparent,stretchable and anti-freezing hybrid double-network organohydrogels  

透明、可拉伸和抗冻的杂化双网络有机水凝胶

作　　者：Liwei Zhu Jing Xu Jianchun Song Minglin Qin Shijia Gu Wei Sun Zhengwei You 朱李伟;徐静;宋建春;秦明林;顾士甲;孙巍;游正伟(State Key Laboratory for Modification of Chemical Fibers and Polymer Materials,Shanghai Belt and Road Joint Laboratory of Advanced Fiber and Lowdimension Materials(Donghua University),Shanghai Engineering Research Center of Nano-Biomaterials and Regenerative Medicine,Research Base of Textile Materials for Flexible Electronics and Biomedical Applications(China Textile Engineering Society),College of Materials Science and Engineering,Institute of Functional Materials,Donghua Univeristy,Shanghai 201620,China;AccuPath Medical(Jiaxing)Co.,Ltd.,Shanghai 201203,China)

机构地区：[1]State Key Laboratory for Modification of Chemical Fibers and Polymer Materials,Shanghai Belt and Road Joint Laboratory of Advanced Fiber and Lowdimension Materials(Donghua University),Shanghai Engineering Research Center of Nano-Biomaterials and Regenerative Medicine,Research Base of Textile Materials for Flexible Electronics and Biomedical Applications(China Textile Engineering Society),College of Materials Science and Engineering,Institute of Functional Materials,Donghua Univeristy,Shanghai 201620,China [2]AccuPath Medical(Jiaxing)Co.,Ltd.,Shanghai 201203,China

出　　处：《Science China Materials》2022年第8期2207-2216,共10页中国科学(材料科学(英文版)

基　　金：financially supported by the National Natural Science Foundation of China(52002059 and 51872204);the Belt&Road Young Scientist Exchanges Project of Science and Technology Commission Foundation of Shanghai(20520741000);the Fundamental Research Funds for the Central Universities(20D110631);the State Key Laboratory for Modification of Chemical Fibers and Polymer Materials(DonghuaUniversity,KF2019)。

摘　　要：Stretchable ionic conductors with high transparency and excellent resilience are highly desired for flexible electronics,but traditional ionic conductive hydrogels are easy to dry and freeze.Herein,a newly hybrid crosslinking strategy is presented for preparing a stretchable and transparent hydrogel by using sodium alginate(SA)and acrylamide based on the unique physically and covalently hybrid crosslinking mechanism,which is transformed into organohydrogel by simple solvent replacement.Due to the combination of hybrid crosslinking double network and hydrogen bond interactions introduced by the glycerin-water binary solvent,the SA-poly(acrylamide)-organohydrogel(SPOH)demonstrates excellent anti-freezing(-20℃)property,stability(>2 days),transparency,stretchability(~1600%)and high ionic conductivity(17.1 mS cm^(-1)).Thus,a triboelectric nanogenerator made from SPOH(O-TENG)shows an instantaneous peak power density of 262 mW m^(-2)at a load resistance of 10 MΩand efficiently harvests biomechanical energy to drive an electronic watch and light-emitting diode.Moreover,The O-TENG exhibits favorable long-term stability(2 weeks)and temperature tolerance(-20℃).In addition,the raw materials can be prepared into SPOH fibers by a simple tubular mold method,exhibiting high transparency,which can be used for laser transmission.The various abilities of the SPOH promise the application of energy harvesting and laser transmission for wearable electronics and biomedical field.柔性电子产品非常需要具有高透明度和出色回弹性的可拉伸离子导体,但传统的离子导电水凝胶易于干燥和冻结.在此,基于独特的物理和共价杂化交联机制,我们提出了一种新的杂化交联策略,用海藻酸钠(SA)和丙烯酰胺(AM)制备可拉伸和透明的水凝胶(SPH),并通过简单的溶剂置换方法将其转化为有机水凝胶.所得SA-PAM-有机水凝胶(SPOH)表现出出色的综合性能,如优异的抗冻性能(−20℃)、高稳定性(>2天)、高透明度、优异的可拉伸性(~1600%)和高离子电导率(17.1 mS cm^(−1)).因此,由SPOH构筑的摩擦纳米发电机(O-TENG)在10 MΩ的负载下显示出262 mW m−2的瞬时峰值功率密度,并且能有效地收集人体运动产生的机械能来驱动电子手表和发光二极管.此外,O-TENG表现出良好的长期稳定性(2周)和温度耐受性(−20℃).另外,该原料可以通过简单的管状模具法制备成柔性有机水凝胶纤维,该纤维具有高透明度,可用于传输激光.该多功能有机水凝胶具有能量收集和激光传输的应用前景,有望用于可穿戴电子和生物医学领域.

关 键 词：double network GLYCERIN organohydrogel antifreezing triboelectric nanogenerator 

分 类 号：TQ427.26[化学工程]