文献类型：期刊文献

英文题名：Thermal- and photo-responsive liquid crystalline elastomers fabricated using tung oil-based azobenzene

作者：Zhang, Haibo[1,2] Li, Wanbing[1,2] Liu, He[1] Shang, Shibin[1] Song, Zhanqian[1]

第一作者：张海波;Zhang, Haibo

通信作者：Shang, SB[1]

机构：[1]Chinese Acad Forestry, Natl Engn Lab Biomass Chem Utilizat, Inst Chem Ind Forestry Prod,State Forestry Adm, Key Lab Biomass Energy & Mat,Key & Open Lab Fores, Nanjing 210042, Jiangsu, Peoples R China;[2]Nanjing Forestry Univ, Co Innovat Ctr Efficient Proc & Utilizat Forest R, Nanjing 210037, Peoples R China

年份：2021

卷号：28

外文期刊名：MATERIALS TODAY COMMUNICATIONS

收录：;EI(收录号：20212510535109);Scopus(收录号：2-s2.0-85108138657);WOS:【SCI-EXPANDED(收录号:WOS:000715215100001)】；

基金：We acknowledge the support from the National Natural Science Foundation of China (31901261) , the Jiangsu Key Laboratory for Biomass Energy and Materials (JSBEM-S-201907) and the Discipline Group Construction Project of CAFICIFP (LHSXKQ1).

语种：英文

外文关键词：Tung oil; Liquid crystalline elastomers; Thermal-responsiveness; Photo-responsiveness

摘要：Azobenzene-based liquid crystalline elastomers with dynamic ester bonds exhibit high thermal-and photo responsive properties. However, there are a few studies that focus on photo-induced and thermal-induced behaviors separately. Herein, novel thermal-and photo-responsive LCEs containing dynamic ester bonds were prepared from 4,4'-diglycidyloxy-azobenzene, sebacic acid and tung oil-based azobenzene, which acted as a side chain. The dynamic transesterification reactions on the network structure were confirmed through stress relaxation. The photo-induced and thermal-induced behaviors were also investigated. The monodomain LCEs film was obtained by uniaxial stretching at a temperature above the smectic-isotropic phase transition temperature (T-i-82 degrees C). Due to the breakage and formation of dynamic ester bonds and the order-disorder smectic phase transition caused by heat and the trans-cis isomerization of azobenzene mesogens, the thermal-induced stress of the monodomain LCEs film reached similar to 3 MPa. The LCEs film also exhibited thermal-induced shape memory properties. Investigation of its photo-responsive behavior further demonstrated that the monodomain LCEs film generated stress of similar to 1.1 MPa while exhibited photo-induced deformation due to the trans-cis isomerization of azobenzene mesogens upon irradiation with 365 nm UV light. Finally, we observed that the monodomain LCEs film could undergo quickly photo-induced deformation and could be processed into a photo driven gripper.