One kind of side chain liquid crystal epoxy(S-LCE) based on biphenyl mesomorphic unit is synthesized from 2,2-bis(hydroxymethyl)propionic acid,4-phenyl phenol,and epichlorohydrin.And the intrinsic thermal conductive l...One kind of side chain liquid crystal epoxy(S-LCE) based on biphenyl mesomorphic unit is synthesized from 2,2-bis(hydroxymethyl)propionic acid,4-phenyl phenol,and epichlorohydrin.And the intrinsic thermal conductive liquid crystal epoxy film(LCEF) simultaneously combining with intrinsic self-healing performance is then prepared via thiol-epoxide nucleophilic ring-opening reaction and coating method.1 H NMR and FTIR show that S-LCE and LCEF have been successfully prepared.S-LCE presents nematic liquid crystal from room temperature to 160℃.LCEF maintains nematic liquid crystal performance and shows highly intrinsic thermal conductivity & excellent self-healing performance.Thermal conductivity coefficient(λ)values in vertical direction(λ⊥)and parallel direction(λ‖)of LCEF are 0.33 and 1.25 W/mK,re spectively,much higher than that of general bisphenol A epoxy resin(E-51,λ⊥ of 0.19 W/mK and λ‖ of0.65 W/mK).Tensile strength of LCEF is 10.6 MPa,which can maintain at 90.6 % and 61.3 % after one and four cycles of self-healing behavior,respectively.In addition,LCEF presents a wide service temperature range(-9.8-251℃) and good thermal stability(THRI of 148.5℃).Simultaneously,LCEF has good transparency,flexibility,and tailorability,expected to be utilized in the fields of flexible electronic devices and intelligent structures.展开更多
基金support and funding from Guangdong Basic and Applied Basic Research Foundation(2019B1515120093)National Natural Science Foundation of China(51773169 and 51973173)+3 种基金Fundamental Research Funds for the Central Universities (310201911py010)Natural Science Basic Research Plan for Distinguished Young Scholars in Shaanxi Province(2019JC-11)Open Fund from Henan University of Science and Technology (2020-RSC01)Innovation Foundation for Doctor Dissertation of Northwestern Polytechnical University (CX201920)。
文摘One kind of side chain liquid crystal epoxy(S-LCE) based on biphenyl mesomorphic unit is synthesized from 2,2-bis(hydroxymethyl)propionic acid,4-phenyl phenol,and epichlorohydrin.And the intrinsic thermal conductive liquid crystal epoxy film(LCEF) simultaneously combining with intrinsic self-healing performance is then prepared via thiol-epoxide nucleophilic ring-opening reaction and coating method.1 H NMR and FTIR show that S-LCE and LCEF have been successfully prepared.S-LCE presents nematic liquid crystal from room temperature to 160℃.LCEF maintains nematic liquid crystal performance and shows highly intrinsic thermal conductivity & excellent self-healing performance.Thermal conductivity coefficient(λ)values in vertical direction(λ⊥)and parallel direction(λ‖)of LCEF are 0.33 and 1.25 W/mK,re spectively,much higher than that of general bisphenol A epoxy resin(E-51,λ⊥ of 0.19 W/mK and λ‖ of0.65 W/mK).Tensile strength of LCEF is 10.6 MPa,which can maintain at 90.6 % and 61.3 % after one and four cycles of self-healing behavior,respectively.In addition,LCEF presents a wide service temperature range(-9.8-251℃) and good thermal stability(THRI of 148.5℃).Simultaneously,LCEF has good transparency,flexibility,and tailorability,expected to be utilized in the fields of flexible electronic devices and intelligent structures.
