From cloudy to transparent: Chain rearrangement in hydrogen-bonded layer-by-layer assembled films
文献类型：期刊论文
| 作者 | Yang, Shuguang; Zhang, Yongjun; Zhang, Xiaoyan; Guan, Ying; Xu, Jian; Zhang, Xiaoli |
| 刊名 | CHEMPHYSCHEM
 |
| 出版日期 | 2007-02-19 |
| 卷号 | 8期号:3页码:418-424 |
| 关键词 | Layer-by-layer Assembly Polymers Surface Chemistry Thin Films Uv/vis Spectroscopy |
| ISSN号 | 1439-4235 |
| DOI | 10.1002/cphc.200600595 |
| 英文摘要 | The cloudiness of hydrogen-bonded LBL films assembled from polyvinylpyrrolidone (PVPON) and poly(acrylic acid) (PAA) is studied in detail by two approaches: spectroscopy (Fabry-Perot fringes) and microscopy (AFM). Fabrication parameters such as temperature, molecular weight, pH value, and rinsing time, have notable influences on film cloudiness. The buildup of the PVPON/PAA film is a two-stage process of adsorption and chain rearrangement. Generally, adsorption is fast, while chain rearrangement is slow. The fast adsorption process traps defects, whereas the relatively slow chain-rearrangement process can not heal the defects in time; therefore, the number of defects continuously increases as LBL assembly proceeds, and a cloudy, heterogeneous film is produced. However, the as-prepared cloudy films become transparent and homogeneous on subsequent annealing in acidic water. UV/Vis spectroscopy and fluid AFM were applied to monitor this transition ex situ and in situ, respectively. It is found that increasing the annealing temperature accelerates the transition from cloudy to transparent, and the transition of the film made from higher molecular weight polymer is slower. |
| 语种 | 英语 |
| WOS记录号 | WOS:000244496200009 |
| 出版者 | WILEY-V C H VERLAG GMBH |
| 源URL | [http://ir.iccas.ac.cn/handle/121111/62803]  |
| 专题 | 中国科学院化学研究所 |
| 通讯作者 | Xu, Jian |
| 作者单位 | Chinese Acad Sci, Inst Chem, State Key Lab Polymer Phys & Chem, Beijing 100080, Peoples R China |
| 推荐引用方式 GB/T 7714 | Yang, Shuguang,Zhang, Yongjun,Zhang, Xiaoyan,et al. From cloudy to transparent: Chain rearrangement in hydrogen-bonded layer-by-layer assembled films[J]. CHEMPHYSCHEM,2007,8(3):418-424. |
| APA | Yang, Shuguang,Zhang, Yongjun,Zhang, Xiaoyan,Guan, Ying,Xu, Jian,&Zhang, Xiaoli.(2007).From cloudy to transparent: Chain rearrangement in hydrogen-bonded layer-by-layer assembled films.CHEMPHYSCHEM,8(3),418-424. |
| MLA | Yang, Shuguang,et al."From cloudy to transparent: Chain rearrangement in hydrogen-bonded layer-by-layer assembled films".CHEMPHYSCHEM 8.3(2007):418-424. |
入库方式： OAI收割
来源：化学研究所
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