Disassociation of Hydrogen-bonded Polymer Complex Thin Films in Acidic Solvents

Song-mei Ma; Shu-yong Liu; Xue-jian Zhang; Shu-guang Yang; Jian Xu

doi:10.11777/j.issn1000-3304.2015.14432

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Disassociation of Hydrogen-bonded Polymer Complex Thin Films in Acidic Solvents

Research Article | 更新时间：2021-03-19

- Disassociation of Hydrogen-bonded Polymer Complex Thin Films in Acidic Solvents
- Acta Polymerica Sinica Issue 7, Pages: 786-791(2015)
- 作者机构：
  
  1. 东华大学材料科学与工程学院纤维材料改性国家重点实验室,上海,201620
  2. 中国科学院化学研究所,北京,100190
- 作者简介：
- 基金信息：
- DOI：10.11777/j.issn1000-3304.2015.14432
  CLC：
- Published：20 July 2015，
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Song-mei Ma, Shu-yong Liu, Xue-jian Zhang, Shu-guang Yang, Jian Xu. Disassociation of Hydrogen-bonded Polymer Complex Thin Films in Acidic Solvents. [J]. Acta Polymerica Sinica (7):786-791(2015)
DOI：

Song-mei Ma, Shu-yong Liu, Xue-jian Zhang, Shu-guang Yang, Jian Xu. Disassociation of Hydrogen-bonded Polymer Complex Thin Films in Acidic Solvents. [J]. Acta Polymerica Sinica (7):786-791(2015) DOI： 10.11777/j.issn1000-3304.2015.14432.

摘要

以聚乙烯吡咯烷酮(PVPON)、聚丙烯酸(PAA)分别为氢键受体和氢键给体

利用层层组装技术制备高分子氢键复合膜.利用紫外-可见光谱、红外光谱及原子力显微镜研究了PVPON/PAA氢键复合薄膜在甲酸、三氟乙酸、磷酸、多聚磷酸中的解离过程.氢键复合薄膜在酸性溶剂中解离速率的快慢为三氟乙酸磷酸甲酸.在不同的酸性溶剂中

氢键复合膜的解离机理不同.三氟乙酸体系主要与薄膜中的PAA发生作用

致使PAA与PVPON之间的氢键解离

从而薄膜溶解.而磷酸和多聚磷酸体系则主要与PVPON发生作用

使薄膜溶解.多聚磷酸与磷酸相比

具有更多质子给体基团

与PVPON作用是体现出协同效应.甲酸和PAA同属于羧酸

甲酸分子很难取代PAA

与PVPON形成氢键

其溶解速度非常缓慢.

Abstract

The hydrogen-bonded films were prepared via layer-by-layer assembly of poly(vinylpyrrolidone) (PVPON

hydrogen bond acceptors) and poly(acrylic acid) (PAA

hydrogen bond donors).UV-Visible spectra

FTIR spectra and AFM were used to investigate the hydrogen bond detachment and the film disintegration in acidic solvents:formic acid

trifluoroacetic acid

phosphoric acid and poly(phosphoric acid).The dissolution rate of the PVPON/PAA thin film in different acids was queued as:trifluoroacetic acid phosphoric acid formic acid.The experimental results indicated that the mechanism of hydrogen bond detachment was not the same in different acids.Trifluoroacetic acid shows strong interaction with PAA

which induces the detachment of hydrogen bonds between PVPON and PAA

and thus the PVPON/PAA film dissolves.However

phosphoric acid or poly(phosphoric acid) has strong interaction with PVPON

which makes hydrogen bonds between PVPON and PAA break and the thin film decomposes.Poly(phosphoric acid) has more hydrogen bonding donor groups than phosphoric acid

and hence the interaction between poly(phosphoric acid) and PVPON exhibits an synergetic effect.Formic acid and PAA both belong to the family of carboxylic acids.It is very hard for formic acid to replace PAA to form hydrogen bond with PVPON

and hence the film dissolution rate in formic acid is very low.

关键词

氢键解离层层组装大分子复合物

Keywords

Hydrogen bond detachmentLayer-by-layer assemblyPolymer complex

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Related Institution

Ningbo Institute of Technology, Zhejiang University

Department of Polymer Science and Engineering, Zhejiang University

State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University

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