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碳酸钠对PVA/CMC复合膜微观结构、宏观性能的影响及机理分析

Effect of NaCO on the Microstructure and Macroscopic Properties and Mechanism Analysis of PVA/CMC Composite Film.

作者信息

Zhu Jufang, Li Qiuying, Che Yanchao, Liu Xingchen, Dong Chengcheng, Chen Xinyu, Wang Chao

机构信息

School of Material Science and Engineering, East China University of Science and Technology, 130 Meilong Rd, Shanghai 200000, China.

Shanxi Novofluo New Material Science and Technology Co., LTD, Jinzhong 030600, China.

出版信息

Polymers (Basel). 2020 Feb 14;12(2):453. doi: 10.3390/polym12020453.

DOI:10.3390/polym12020453
PMID:32075180
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7077660/
Abstract

Polyvinyl alcohol (PVA)/carboxyl methyl cellulose sodium (CMC)/NaCO composite films with different contents of NaCO were prepared by blending and solution-casting. The effect of NaCO on the microstructure of PVA/CMC composite film was analyzed by Fourier-transform infrared (FTIR) spectroscopy, X-ray diffraction (XRD), differential scanning calorimetry (DSC), and atomic force microscopy (AFM). Its macroscopic properties were analyzed by water sorption, solubility, and dielectric constant tests. The results show that the microstructure of PVA/CMC/NaCO composite films was different from that of PVA and PVA/CMC composite films. In addition, compared to PVA and PVA/CMC composite films, the water sorption of PVA/CMC/NaCO composite films relatively increased, the solubility in water significantly decreased, and the dielectric properties significantly improved. All these results indicate that the hydrogen bonding interaction between PVA and CMC increased and the crystallinity of PVA decreased after the addition of NaCO. This was also a direct factor leading to increased water sorption, decreased solubility, and enhanced dielectric properties. The reaction mechanism of PVA, CMC, and NaCO is proposed to further evaluate the effect of NaCO on the microstructure and macroscopic properties of PVA/CMC/NaCO composite films.

摘要

通过共混和溶液浇铸法制备了具有不同碳酸钠（Na₂CO₃）含量的聚乙烯醇（PVA）/羧甲基纤维素钠（CMC）/Na₂CO₃复合薄膜。采用傅里叶变换红外光谱（FTIR）、X射线衍射（XRD）、差示扫描量热法（DSC）和原子力显微镜（AFM）分析了Na₂CO₃对PVA/CMC复合薄膜微观结构的影响。通过吸水率、溶解度和介电常数测试分析了其宏观性能。结果表明，PVA/CMC/Na₂CO₃复合薄膜的微观结构与PVA和PVA/CMC复合薄膜不同。此外，与PVA和PVA/CMC复合薄膜相比，PVA/CMC/Na₂CO₃复合薄膜的吸水率相对增加，在水中的溶解度显著降低，介电性能显著提高。所有这些结果表明，添加Na₂CO₃后，PVA与CMC之间的氢键相互作用增强，PVA的结晶度降低。这也是导致吸水率增加、溶解度降低和介电性能增强的直接因素。提出了PVA、CMC和Na₂CO₃的反应机理，以进一步评估Na₂CO₃对PVA/CMC/Na₂CO₃复合薄膜微观结构和宏观性能的影响。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6793/7077660/2a5e48a3de0d/polymers-12-00453-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6793/7077660/992b8c1e93b9/polymers-12-00453-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6793/7077660/b5500a0c39e2/polymers-12-00453-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6793/7077660/c9b2e9731b6e/polymers-12-00453-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6793/7077660/1d23abad7a65/polymers-12-00453-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6793/7077660/93596d9b46b0/polymers-12-00453-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6793/7077660/d4fc4382cca2/polymers-12-00453-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6793/7077660/19a4bcbc598f/polymers-12-00453-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6793/7077660/79cb62338c1a/polymers-12-00453-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6793/7077660/2a5e48a3de0d/polymers-12-00453-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6793/7077660/992b8c1e93b9/polymers-12-00453-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6793/7077660/b5500a0c39e2/polymers-12-00453-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6793/7077660/c9b2e9731b6e/polymers-12-00453-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6793/7077660/1d23abad7a65/polymers-12-00453-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6793/7077660/93596d9b46b0/polymers-12-00453-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6793/7077660/d4fc4382cca2/polymers-12-00453-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6793/7077660/19a4bcbc598f/polymers-12-00453-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6793/7077660/79cb62338c1a/polymers-12-00453-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6793/7077660/2a5e48a3de0d/polymers-12-00453-g009.jpg

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