基于联硼结构的新型剪切增稠超分子材料  

A novel shear-stiffening supramolecular material derived from diboron structure

作　　者：兀琪 彭燕 熊慧 侯雨佳 蔡民杰 王义 赵丽娟 吴锦荣 Qi Wu;Yan Peng;Hui Xiong;Yujia Hou;Minjie Cai;Yi Wang;Lijuan Zhao;Jinrong Wu(College of Polymer Science and Engineering,State Key Laboratory of Polymer Materials Engineering,Sichuan University,Chengdu 610065,China;College of Chemistry and Materials Science,Sichuan Normal University,Chengdu 610066,China;Institute of Chemical Materials,China Academy of Engineering Physics,Mianyang 621999,China)

机构地区：[1]College of Polymer Science and Engineering,State Key Laboratory of Polymer Materials Engineering,Sichuan University,Chengdu 610065,China [2]College of Chemistry and Materials Science,Sichuan Normal University,Chengdu 610066,China [3]Institute of Chemical Materials,China Academy of Engineering Physics,Mianyang 621999,China

出　　处：《Science China Materials》2023年第11期4489-4498,共10页中国科学(材料科学(英文版)

基　　金：supported by the National Natural Science Foundation of China(52203064,51873110);Sichuan Science and Technology Program(2022YFG0115 and 2021JDJQ0018);Sichuan Science and Technology Program-Natural Science Foundation of Sichuan Province(2022NSFSC1982);the Fundamental Research Funds for the Central Universities(2022SCU12011);the State Key Laboratory of Polymer Materials Engineering。

摘　　要：剪切增稠型聚硼硅氧烷(PBS)通常以“silly putty”,“bouncing putty”或“solid-liquid”被熟知.因其独特的抗冲击性能,PBS广泛应用于防护装甲、运动器材、玩具等领域.然而,自第二次世界大战PBS被发明后,PBS材料的更新升级较少.本论文中,我们通过设计联硼/氧配位键制备了一类新型剪切增稠材料——聚联硼硅氧烷(PDBS).结果表明,与单硼/氧配位键相比,联硼/氧配位键具有更多的配位结构和更高的键能,导致PDBS具有更类固体性的剪切增稠行为.因此,PDBS具有比PBS更优异的抗冲击性能与防护功能,为新一代智能装备、阻尼器和传感器的开发提供了一类高性能防护材料.Shear-stiffening polyborosiloxane(PBS),well-known as“silly putty”,“bouncing putty”or“solid-liquid”,has been widely used in protective armors,sport equipment,toys and so on,due to its fascinating anti-impact property.Since it was created during World War II,there has been rare upgrade of the material.Herein,we synthesize a novel shear-stiffening material,polydiborosiloxane(PDBS),through the design of diboron/oxygen coordination bond.It is revealed that the diboron/oxygen coordination bond possesses more coordina-tion states and higher bond energy than the coordination bond between monoboron and oxygen atoms,leading to a shear-stiffening behavior with more solid-like property.Therefore,PDBS exhibits superior anti-impact property and safe-guarding performance to PBS.This shear-stiffening material will open up a new horizon for next-generation intelligent armors,dampers and sensors.

关 键 词：shear-stiffening anti-impact diboron SILOXANE su-pramolecular structure 

分 类 号：TB34[一般工业技术—材料科学与工程]