基于金属配位键制备高强度物理水凝胶
详细信息 查看官网全文
- 英文论文题名：Tough Physical Hydrogels Based on Metal-Ligand Coordination
- 论文作者：郑司雨 ; 吴子良 ; 郑强
- 英文论文作者：Si Yu Zheng ; Zi Liang Wu ; Qiang Zheng ; MOE Key Laboratory of Macromolecular Synthesis and Functionalization ; Department of Polymer Science and Engineering ; Zhejiang University
- 年：2016
- 作者机构：浙江大学高分子科学与工程学系教育部高分子合成与功能构造重点实验室;
- 论文关键词：金属配位键 ; 高强度 ; 自修复 ; 水凝胶
- 会议召开时间：2016-07-01
- 会议录名称：中国化学会第30届学术年会摘要集-第十七分会：流变学
- 语种：中文
- 分类号：O641.4;O648.17
- 学会代码：ZGHY
- 会议名称：中国化学会第30届学术年会-第十七分会 ; 流变学
- 会议地点：中国辽宁大连
- 主办单位：中国化学会
- 学会名称：中国化学会
- 页数：1
- 文件大小：191k
- 原文格式：D
- 会议级别：全国
摘要
近年来,研究者们采用不同的方法制备了多种高强度水凝胶,大幅拓宽了这一类软材料的应用领域。通过网络结构设计以及一定的能量耗散机制,水凝胶的韧性能够得到大幅提升~([1])。然而,这些水凝胶中通常存在共价键交联网络,因此加工性能较差,难以实现回收利用。针对这一问题,可以用具有动态可逆特征的非共价键代替化学交联制备超分子聚合物水凝胶;常见的非共价作用有氢键、离子键、疏水缔合等~([2,3])。本文通过金属配位键交联聚合物制备高强度物理水凝胶。所制备的水凝胶拉伸断裂伸长率和断裂应力分别达到6MPa和800%。此外,金属配位键具有响应性,可以在一定的条件下破坏和形成,这种动态可逆特征赋予水凝胶良好的加工性、自修复、形状记忆等功能。这种具有多功能的高强度水凝胶将在软驱动器、组织工程等领域发挥作用。
In the past decades,intense efforts have been devoted to fabricate hydrogels with improved mechanical properties via the design of network structure and mechanism of energy dissipation.However,it is still a challenge to develop hydrogels that achieve combination of good mechanical properties along with process ability.Herein,we report meta-coordination mediated physical hydrogels with high toughness,process ability,self-recovery,self-healing,and shape memory properties.The metal-ligand coordination,which can reversibly break and re-form in specific condition,is chosen as the physical cross-links.These physical hydrogels show remarkable mechanical performanes;the breaking strain and stress reach 800%and 6 MPa,which are comparable to those of other tough gels.The dynamic nature of metal-coordination bonds also renders the gels with good processibility,self-healing,and shape memory properties.We believe these mechanically tough and functionally versatile gels will find applications in soft actuator,tissue engineering,etc.
In the past decades,intense efforts have been devoted to fabricate hydrogels with improved mechanical properties via the design of network structure and mechanism of energy dissipation.However,it is still a challenge to develop hydrogels that achieve combination of good mechanical properties along with process ability.Herein,we report meta-coordination mediated physical hydrogels with high toughness,process ability,self-recovery,self-healing,and shape memory properties.The metal-ligand coordination,which can reversibly break and re-form in specific condition,is chosen as the physical cross-links.These physical hydrogels show remarkable mechanical performanes;the breaking strain and stress reach 800%and 6 MPa,which are comparable to those of other tough gels.The dynamic nature of metal-coordination bonds also renders the gels with good processibility,self-healing,and shape memory properties.We believe these mechanically tough and functionally versatile gels will find applications in soft actuator,tissue engineering,etc.
引文
[1]Zhao,X.Soft Matter 2014,10:672.
[2]Dai,X.;Zhang,Y.;Gao,L.;Bai,T.;Wang,W.;Cui,Y.;Liu,W.Adv.Mater.2015,27:3566.
[3]Grindy,S.C.;Learsch,R.;Mozhdehi,D.;Cheng,J.;Barrett,D.G.;Guan,Z.;Messersmith,P.B.;Holten-Andersen,N.Nat.Mater.2015,14:1210.
[2]Dai,X.;Zhang,Y.;Gao,L.;Bai,T.;Wang,W.;Cui,Y.;Liu,W.Adv.Mater.2015,27:3566.
[3]Grindy,S.C.;Learsch,R.;Mozhdehi,D.;Cheng,J.;Barrett,D.G.;Guan,Z.;Messersmith,P.B.;Holten-Andersen,N.Nat.Mater.2015,14:1210.