Bandyopadhyay Smarak, Sáha Tomáš, Sanétrník Daniel, Saha Nabanita, Sáha Petr
Centre of Polymer Systems, University Institute, Tomas Bata University in Zlin, Tr. T. Bati 5678, 76001 Zlin, Czech Republic.
Footwear Research Centre, University Institute, Tomas Bata University in Zlin, Nad Ovcirnou IV, 3685 Zlin, Czech Republic.
Polymers (Basel). 2021 Oct 10;13(20):3472. doi: 10.3390/polym13203472.
There is a gap in the literature for the preparation of agar-xanthan gum-carboxymethyl cellulose-based films by thermo compression methods. The present work aims to fill this gap by blending the polysaccharides in a plastograph and preparation of films under high pressure and temperature for a short duration of time. The pivotal aim of this work is also to know the effect of different mixing conditions on the physical, chemical, mechanical and thermal properties of the films. The films are assessed based on results from microscopic, infrared spectroscopic, permeability (WVTR), transmittance, mechanical, rheological and thermogravimetric analysis. The results revealed that the mixing volume and mixing duration had negative effects on the films' transparency. WVTR was independent of the mixing conditions and ranged between 1078 and 1082 g/m·d. The mixing RPM and mixing duration had a positive effect on the film tensile strength. The films from the blends mixed at higher RPM for a longer time gave elongation percentage up to 78%. Blending also altered the crystallinity and thermal behavior of the polysaccharides. The blend prepared at 80 RPM for 7 min and pressed at 140 °C showed better percent elongation and light barrier properties.
在通过热压法制备基于琼脂-黄原胶-羧甲基纤维素的薄膜方面，文献中存在空白。本工作旨在通过在塑炼机中混合多糖，并在高压和高温下短时间制备薄膜来填补这一空白。这项工作的关键目标还包括了解不同混合条件对薄膜物理、化学、机械和热性能的影响。基于显微镜、红外光谱、渗透率（水蒸气透过率）、透光率、机械性能、流变学和热重分析的结果对薄膜进行评估。结果表明，混合体积和混合时间对薄膜的透明度有负面影响。水蒸气透过率与混合条件无关，范围在1078至1082 g/m·d之间。混合转速和混合时间对薄膜的拉伸强度有积极影响。在较高转速下混合较长时间的共混物制成的薄膜伸长率高达78%。共混还改变了多糖的结晶度和热行为。在80转/分钟下混合7分钟并在140°C下压制成的共混物表现出更好的伸长率百分比和阻光性能。
