Ahmadzadeh Safoura, Desobry Stephane, Keramat Javad, Nasirpour Ali
Department of Food Science and Technology, College of Agriculture, Isfahan University of Technology, Isfahan, Iran.
Engineering Laboratory Biomolecules (LIBio), The National Polytechnic Institute of Lorraine (INPL), ENSAIA, Nancy, France.
Carbohydr Polym. 2016 May 5;141:211-9. doi: 10.1016/j.carbpol.2016.01.017. Epub 2016 Jan 12.
In this study, cellulose foams incorporated with surface-modified montmorillonite (SM-MMT) were prepared following NaOH dissolution and regeneration into water and ethanol. According to the SEM images, the type of coagulating agent significantly affected the morphological properties of composite foams. The crystalline parameters were evaluated using wide-angle X-ray diffraction (WAXD), which showed an increase in crystal size as the effect of SM-MMT; however, the crystal size decreased for the samples treated with ethanol. The distribution of hydrogen bond types was also investigated using Fourier transform infrared (FTIR). Resolving the hydrogen-bonded OH stretching band at around 3340 into five bands indicated that presence of SM-MMT caused the shift of OH-stretching vibration band to lower wave number due to new hydrogen bonds between cellulose and SM-MMT. In general, the results indicated a change in the contents of the intra- and inter-molecular hydrogen bonds when the coagulant was changed or SM-MMT was incorporated.
在本研究中，通过将纤维素在氢氧化钠中溶解并在水和乙醇中再生，制备了含有表面改性蒙脱石（SM-MMT）的纤维素泡沫材料。根据扫描电子显微镜（SEM）图像，凝固剂的类型显著影响了复合泡沫材料的形态特性。使用广角X射线衍射（WAXD）对晶体参数进行了评估，结果表明，作为SM-MMT作用的结果，晶体尺寸有所增加；然而，经乙醇处理的样品的晶体尺寸减小。还使用傅里叶变换红外光谱（FTIR）研究了氢键类型的分布。将3340附近的氢键合OH伸缩带解析为五个谱带，这表明由于纤维素与SM-MMT之间形成了新的氢键，SM-MMT的存在导致OH伸缩振动带向更低波数移动。总体而言，结果表明，当改变凝固剂或加入SM-MMT时，分子内和分子间氢键的含量会发生变化。
