大连理工大学主页平台管理系统王华楠 Wide-range linear viscoelastic hydrogels with high mechanical properties and their applications in quantifiable stress-strain sensors 王华楠

论文成果

Wide-range linear viscoelastic hydrogels with high mechanical properties and their applications in quantifiable stress-strain sensors: 点击次数：; 发布时间： 2020-09-30; 发布时间：2020-09-30; 论文类型：期刊论文; 发表时间：2020-11-01; 发表刊物：CHEMICAL ENGINEERING JOURNAL; 收录刊物：SCIE; 卷号：399; ISSN号：1385-8947; 关键字：Physical hydrogels; Wide-range linear viscoelasticity; Homogeneous network; Multi interactions; Quantifiable stress-strain sensor; 摘要：Wide-range linear viscoelastic materials with high mechanical properties have not been reported yet, despite their bright prospect in diverse applications. Herein, we fabricate a class of physical hydrogels manifesting linear stress-strain relationship up to a strain of 1700%, high tensile stress up to 12.0 MPa and fracture toughness up to 82.1 MJ/m(3), yet the materials are quite soft with Young's modulus from 0.2 to 1.1 MPa. Such physical hydrogels are formed by designing a homogeneous network with multiple coordination interactions of different bonding strength. Under small deformation, the homogeneous network enables affine deformation featured by entropic elasticity with negligible energy dissipation. Further increasing the deformation, the elongated network chains progressively break the weak to strong coordination interactions, which not only leads to a linear increase in stress, but also generates constant growth in energy dissipation. Moreover, the hydrogels show linear relative resistance change-strain-stress behavior, and thus can be used as quantifiable stress-strain sensors to simultaneously monitor deformation and force of soft robotics, wearable devices, flexible electronics, rehabilitation and sport equipments.

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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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