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首页> 美国卫生研究院文献>Polymers >Effect of Na2CO3 on the Microstructure and Macroscopic Properties and Mechanism Analysis of PVA/CMC Composite Film
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Effect of Na2CO3 on the Microstructure and Macroscopic Properties and Mechanism Analysis of PVA/CMC Composite Film

机译：Na2CO3对PVA / CMC复合膜微观结构宏观性能的影响及机理分析

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摘要

Polyvinyl alcohol (PVA)/carboxyl methyl cellulose sodium (CMC)/Na CO composite films with different contents of Na CO were prepared by blending and solution-casting. The effect of Na CO 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/Na CO 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/Na CO 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 Na CO . This was also a direct factor leading to increased water sorption, decreased solubility, and enhanced dielectric properties. The reaction mechanism of PVA, CMC, and Na CO is proposed to further evaluate the effect of Na CO on the microstructure and macroscopic properties of PVA/CMC/Na CO composite films.
机译：通过共混和溶液流延制备了聚乙烯醇（PVA）/羧甲基纤维素钠（CMC）/碳酸钠复合膜。通过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NaCO对PVA / CMC复合膜微结构的影响。通过吸水，溶解度和介电常数测试分析了其宏观性能。结果表明，PVA / CMC / Na CO复合薄膜的微观结构不同于PVA和PVA / CMC复合薄膜。另外，与PVA和PVA / CMC复合膜相比，PVA / CMC / Na CO复合膜的吸水率相对增加，在水中的溶解度显着降低，介电性能显着提高。所有这些结果表明，加入NaCO后，PVA和CMC之间的氢键相互作用增加，PVA的结晶度降低。这也是导致水吸收增加，溶解度降低和介电性能增强的直接因素。提出了PVA，CMC和Na CO的反应机理，以进一步评价Na CO对PVA / CMC / Na CO复合膜的微观结构和宏观性能的影响。

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