通过聚醋酸乙烯酯薄膜的非均相皂化制备的新型聚乙烯醇薄膜的表面性质

Surface Properties of a Novel Poly(vinyl alcohol) Film Prepared by Heterogeneous Saponification of Poly(vinyl acetate) Film.

作者信息

Yang Seong Baek, Yoo Sung Hun, Lee Joon Seok, Kim Jong Won, Yeum Jeong Hyun

机构信息

Department of Bio-Fibers and Materials Science, Kyungpook National University, Daegu 41566, Korea.

Department of Textile Engineering & Technology, Yeungnam University, Gyeongsan 38541, Korea.

出版信息

Polymers (Basel). 2017 Oct 9;9(10):493. doi: 10.3390/polym9100493.

DOI:10.3390/polym9100493

PMID:30965796

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC6418924/

Abstract

Almost general poly(vinyl alcohol) (PVA) films were prepared by the processing of a PVA solution. For the first time, a novel poly(vinyl alcohol) (PVA) film was prepared by the saponification of a poly(vinyl acetate) (PVAc) film in a heterogenous medium. Under the same saponification conditions, the influence of saponification time on the degree of saponification (DS) was studied for the preparation of the saponified PVA film, and it was found that the DS varied with time. Optical microscopy was used to confirm the characteristics and surface morphology of the saponified PVA film, revealing unusual black globules in the film structure. The contact angle of the films was measured to study the surface properties, and the results showed that the saponified PVA film had a higher contact angle than the general PVA film. To confirm the transformation of the PVAc film to the PVA film, ¹H nuclear magnetic resonance spectroscopy, X-ray diffraction measurements, differential scanning calorimetry, and Fourier-transform infrared spectroscopy were employed.

摘要

几乎所有的聚乙烯醇（PVA）薄膜都是通过聚乙烯醇溶液加工制备的。首次通过在非均相介质中对聚醋酸乙烯酯（PVAc）薄膜进行皂化反应制备了一种新型聚乙烯醇（PVA）薄膜。在相同的皂化条件下，研究了皂化时间对皂化聚乙烯醇薄膜皂化度（DS）的影响，发现皂化度随时间变化。利用光学显微镜确认了皂化聚乙烯醇薄膜的特性和表面形态，揭示了薄膜结构中存在异常的黑色小球。测量薄膜的接触角以研究其表面性质，结果表明皂化聚乙烯醇薄膜的接触角高于普通聚乙烯醇薄膜。为了确认聚醋酸乙烯酯薄膜向聚乙烯醇薄膜的转变，采用了¹H核磁共振光谱、X射线衍射测量、差示扫描量热法和傅里叶变换红外光谱法。