Fabrication of robust honeycomb polymer films: a facile photochemical cross-linking process.
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.
Li
Lei
L
College of Materials, Xiamen University, Xiamen 361005, PR China. lilei@xmu.edu.cn
Chen
Caikang
C
Zhang
Aijuan
A
Liu
Xinyu
X
Cui
Kun
K
Huang
Jin
J
Ma
Zhi
Z
Han
Zhaohui
Z
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
D003432:Cross-Linking Reagents; D011108:Polymers; D012997:Solvents