title: Tunable disintegration of layer-by-layer assembly multilayer films based on hydrolytical-polybetaine at wide-range time.
abstract: A cationic hydrolytical-polycarboxybetaine (HPCB), poly(N-ethyl acetate-4-vinylpyridinium bromide) was synthesized by incorporating ester group into the side chain of polycarboxybetaine (PCB). The hydrolytic behaviors of HPCB samples in pH 7.4 phosphate buffer saline (PBS) were investigated by FT-IR and (1)H NMR. The layer-by-layer (LbL) assembly of HPCB/poly (sodium 4-styrenesulfonate) PSS and the disintegration of HPCB/PSS multilayer films were monitored by UV-vis absorption spectroscopy, quartz crystal microbalance (QCM) and atomic force microscopy (AFM). The disintegrated behavior of multilayer films was studied in detail by changing the cationic degree of HPCB and the pH of the immersion solution (PBS) in the disintegration process. The disintegration time of HPCB/PSS multilayer films could be controlled widely from 2 min to 30 days in PBS.
authors.affiliation: MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science & Engineering, Zhejiang University, Hangzhou, Zhejiang, China.
authors.forename: Zhangliang
authors.initials: Z
authors.lastname: Gui
authors.forename: Jinwen
authors.initials: J
authors.lastname: Qian
authors.forename: Yuan
authors.initials: Y
authors.lastname: He
authors.forename: Quanfu
authors.initials: Q
authors.lastname: An
authors.forename: Xuesan
authors.initials: X
authors.lastname: Wang
authors.forename: Chengpeng
authors.initials: C
authors.lastname: Tian
authors.forename: Wendan
authors.initials: W
authors.lastname: Sun