title: Fabrication of robust honeycomb polymer films: a facile photochemical cross-linking process.
abstract: Highly ordered honeycomb films are prepared by breath-figure method using an amphiphilic diblock copolymer of polystyrene-block-polyacrylic acid (PS-b-PAA). By simply cross-linking PS matrix via deep ultraviolet (UV) irradiation, both the solvent and thermal stability of the porous films was significantly improved while retaining the three-dimensional (3D) structures. The film surface wettability was changed from hydrophobicity to hydrophilicity by the formed polar groups during the photochemical process. After 6 h UV cross-linking, the honeycomb structures could be preserved up to 320 degrees C, an increase of more than 200 K as compared to the non-cross-linked films.
authors.affiliation: College of Materials, Xiamen University, Xiamen 361005, PR China. lilei@xmu.edu.cn
authors.forename: Lei
authors.initials: L
authors.lastname: Li
authors.forename: Caikang
authors.initials: C
authors.lastname: Chen
authors.forename: Aijuan
authors.initials: A
authors.lastname: Zhang
authors.forename: Xinyu
authors.initials: X
authors.lastname: Liu
authors.forename: Kun
authors.initials: K
authors.lastname: Cui
authors.forename: Jin
authors.initials: J
authors.lastname: Huang
authors.forename: Zhi
authors.initials: Z
authors.lastname: Ma
authors.forename: Zhaohui
authors.initials: Z
authors.lastname: Han
mesh_terms: D003432:Cross-Linking Reagents / Q000737:chemistry*; D008855:Microscopy, Electron, Scanning; D015394:Molecular Structure; D010777:Photochemistry; D011108:Polymers / Q000737:chemistry*; D012997:Solvents / Q000737:chemistry; D017550:Spectroscopy, Fourier Transform Infrared; D013499:Surface Properties; D013696:Temperature
chemical_list: D003432:Cross-Linking Reagents; D011108:Polymers; D012997:Solvents