大连理工大学主页平台管理系统王华楠 Mechanically robust, ultrastretchable and thermal conducting composite hydrogel and its biomedical applications 王华楠

论文成果

Mechanically robust, ultrastretchable and thermal conducting composite hydrogel and its biomedical applications: 点击次数：; 发布时间： 2019-07-01; 发布时间：2019-07-01; 论文类型：期刊论文; 发表时间：2019-03-15; 发表刊物：CHEMICAL ENGINEERING JOURNAL; 收录刊物：EI、SCIE; 卷号：360; 页面范围：231-242; ISSN号：1385-8947; 关键字：Boron nitride nanosheets; Vinyl-functionalized; Polyacrylamide hydrogels; Covalent bond interactions; Mechanical properties; Thermal conductivity; 摘要：While hydrogels with both high mechanical properties and thermal conductivity hold great promise for applications in artificial cartilages, actuators, antipyretic pastes and so on, it is still challenging to fabricate such hydrogels. Here, we report a class of mechanically robust, ultrastretchable and thermal-conducting composite hydrogels by in situ polymerizing acrylamide monomers in the presence of vinyl-functionalized boron nitride nanosheets (v-BNNS). The v-BNNS bear many vinyl groups, thereby chemically crosslinking the polyacrylamide chains during the polymerization process, which not only leads to a more impact network, but also promotes the load transfer between the nanoparticles and polymer chains. As a result, the composite hydrogels with 4 wt% v-BNNS show about 700% and 680% increases in compressive stress and tensile strength, respectively, and simultaneously possess ultrastretchability of 2000%. Meanwhile, the composite hydrogels are highly anti-fatigue, as dynamic loading-unloading tests show that they have outstanding load-bearing and shape recovery properties even after 820 cycles. Moreover, due to the high thermal conductivity of v-BNNS and the covalent interaction facilitating phonon transfer between v-BNNS and matrix, a 63% improvement in thermal conductivity of the composite hydrogels can be achieved by adding only 4 wt% of v-BNNS. We further demonstrate that the composite hydrogels have good biocompatibility, and thus can be applied as antipyretic pastes with excellent ability to relieve fever and potentially as artificial cartilages due to their anti-fatigue performance.

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王华楠

同专业博导同专业硕导个人学术主页

教授博士生导师硕士生导师

性别：男

毕业院校：Radboud大学奈美根医学院

学位：博士

所在单位：生物工程学院

学科：生物化工. 生物工程与技术. 高分子材料

办公地点：生物工程学院525

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