ICCAS OpenIR
Effect of block sequence and block length on the stimuli-responsive behavior of polyampholyte brushes: hydrogen bonding and electrostatic interaction as the driving force for surface rearrangement
Yu, Kai; Han, Yanchun
2009
Source PublicationSOFT MATTER
ISSN1744-683X
Volume5Issue:4Pages:759-768
AbstractDiblock polyampholyte brushes with different block sequences (Si/SiO(2)/poly(acrylic acid)-b-poly (2-vinylpyridine) (PAA-b-P2VP) brushes and Si/SiO(2)/P2VP-b-PAA brushes) and different block lengths were synthesized by sequent surface-initiated atom transfer radical polymerization (ATRP). The PAA block was obtained through hydrolysis from the corresponding poly(tert-butyl acrylate). The polyampholyte brushes demonstrated unique pH-responsive behavior. In the intermediate pH region, the brushes exhibited a less hydrophilic wetting behavior and a rougher surface morphology due to the formation of polyelectrolyte complex through electrostatic interaction between oppositely charged blocks. In the low pH and high pH regions, the rearrangement of polyampholyte brushes showed great dependence on the block sequence and block length. The polyampholyte brushes with P2VP-b-PAA sequence underwent rearrangement during alternative treatment by acidic aqueous solution (low pH value) and basic aqueous solution (high pH value). The brushes with PAA-b-P2VP sequence did not show obvious rearrangement. Nevertheless, with increasing the length of inner PAA block for PAA-b-P2VP brushes, the hydrogen-bonding interaction between blocks became strong enough to implement surface rearrangement and eventually localized the inner PAA block at the polymer air interface in the low pH region. In the high pH region, polymer brushes had least chance of surface rearrangement. P2VP block was more localized at the interface despite of the length of inner block.
DOI10.1039/b805611k
Indexed BySCI
Language英语
WOS IDWOS:000263272300009
PublisherROYAL SOC CHEMISTRY
Citation statistics
Cited Times:27[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/65906
Collection中国科学院化学研究所
Corresponding AuthorHan, Yanchun
AffiliationChinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Polymer Phys & Chem, Grad Sch, Changchun 130022, Peoples R China
Recommended Citation
GB/T 7714
Yu, Kai,Han, Yanchun. Effect of block sequence and block length on the stimuli-responsive behavior of polyampholyte brushes: hydrogen bonding and electrostatic interaction as the driving force for surface rearrangement[J]. SOFT MATTER,2009,5(4):759-768.
APA Yu, Kai,&Han, Yanchun.(2009).Effect of block sequence and block length on the stimuli-responsive behavior of polyampholyte brushes: hydrogen bonding and electrostatic interaction as the driving force for surface rearrangement.SOFT MATTER,5(4),759-768.
MLA Yu, Kai,et al."Effect of block sequence and block length on the stimuli-responsive behavior of polyampholyte brushes: hydrogen bonding and electrostatic interaction as the driving force for surface rearrangement".SOFT MATTER 5.4(2009):759-768.
Files in This Item:
There are no files associated with this item.
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Yu, Kai]'s Articles
[Han, Yanchun]'s Articles
Baidu academic
Similar articles in Baidu academic
[Yu, Kai]'s Articles
[Han, Yanchun]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Yu, Kai]'s Articles
[Han, Yanchun]'s Articles
Terms of Use
No data!
Social Bookmark/Share
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.