具有力学增强及抗冲击性能的光固化自褶皱涂层  

Self-wrinkling coating for impact resistance and mechanical enhancement

作　　者：李瑾 张晓亮 苏志龙 李甜甜 王泽鸿 董仕龙 徐凡 马晓东 印杰 姜学松 Jin Li;Xiaoliang Zhang;Zhilong Su;Tiantian Li;Zehong Wang;Shilong Dong;Fan Xu;Xiaodong Ma;Jie Yin;Xuesong Jiang(School of Chemistry&Chemical Engineering,Frontiers Science Center for Transformative Molecules,State Key Laboratory for Metal Matrix Composite Materials,Shanghai Jiao Tong University,Shanghai 200240,China;Department of Aeronautics and Astronautics,Fudan University,Shanghai 200433,China)

机构地区：[1]School of Chemistry&Chemical Engineering,Frontiers Science Center for Transformative Molecules,State Key Laboratory for Metal Matrix Composite Materials,Shanghai Jiao Tong University,Shanghai 200240,China [2]Department of Aeronautics and Astronautics,Fudan University,Shanghai 200433,China

出　　处：《Science Bulletin》2023年第19期2200-2209,M0004,共11页科学通报（英文版）

基　　金：the National Natural Science Foundation of China(52103144,52025032,and 12122204);Shanghai Sailing Program(23YF1420000);the National Key R&D Program of China(2021YFB4001100 and 2021YFB4001103);Shanghai Pilot Program for Basic Research-Fudan University(21TQ140010021TQ010);Shanghai Shuguang Program(21SG05)。

摘　　要：表面聚合物涂层作为保护层广泛应用于表面防腐、防渗透和抗冲击等各种领域,如何在已有材料体系和工艺条件下提高涂层机械力学性能,是一个重要但具有挑战性的问题.受自下而上的制造工艺和生物体的层级结构的能量耗散机制的启发,本文开发了一种具有自褶皱表面形态和梯度交联结构的光固化涂层.理论模拟和实验结果表明,表面自褶皱的独特形貌和体系内梯度交联结构有助于提升涂层的力学性能及抗冲击性.这种光固化自褶皱涂层为设计功能抗冲击聚合物涂层材料开辟了新的途径.Protective materials are essential for personal,electronic,and military defenses owing to their efficient impact-resistant and energy-absorbing properties.Inspired by the bottom-up fabrication process and energy dissipation mechanism of natural organisms with hierarchical structures,we demonstrated a self-wrinkled photo-curing coating as a new protective material for enhancing the anti-impact property of the substrates.Owing to the self-assembly of polydimethylsiloxane(PDMS)containing polymeric photoinitiator on the surface,the liquid coating formulation was photo-cured by one-step UV irradiation with simultaneous generation of self-wrinkled surface morphology and a gradient cross-linked architecture.The maximum impact resistance height(hmax)of the glass substrate coated with plain coating increased from 120 to 180 cm when coated with wrinkled gradient coating.Furthermore,the Young’s modulus,fracture stress,and toughness of the wrinkled gradient coating film improved from 39.6 MPa,2.4 MPa,and 74.1 MJ/cm^(3)to 235.0 MPa(~5×increase),18.5 MPa(~6.6×increase),and 845.0 MJ/cm3(~10.8×increase)compared to the pure coating film as reference.The theoretical simulation and experimental results proved that the surface self-wrinkled morphology and intrinsic hierarchical architecture contribute to the energy dissipation and impact resistance of the cured coating.The photocuring process,a bottom-up strategy,is conducted in a non-contact mode compared with nano-printing and lithography,enabling bulk materials to be engineered.

关 键 词：聚合物涂层 机械力学性能 交联结构 光固化 抗冲击性 防渗透 表面形态 制造工艺 

分 类 号：TB306[一般工业技术—材料科学与工程]