Ren Jiawei, Dang Khanh Minh, Pollet Eric, Avérous Luc
Polymer Processing Laboratory, Key Laboratory for Preparation and Application of Ultrafine Materials of Ministry of Education, School of Material Science and Engineering, East China University of Science and Technology, Shanghai 200237, China.
BioTeam/ICPEES-ECPM, UMR CNRS 7515, Université de Strasbourg, 25 rue Becquerel, 67087 Strasbourg CEDEX 2, France.
Polymers (Basel). 2018 Jul 24;10(8):808. doi: 10.3390/polym10080808.
Nano-biocomposites based on halloysite nanoclay and potato starch were elaborated by melt blending with different polyol plasticizers such as glycerol, sorbitol or a mixture of both. The effects of the type of plasticizer and clay content on potato starch/halloysite nano-biocomposites were studied. SEM analyses combined with ATR-FTIR results showed that a high content of sorbitol had a negative effect on the dispersion of the halloysite nanoclay in the starchy matrix. XRD results demonstrated that incorporation of halloysite nanoclay into glycerol-plasticized starch systems clearly led to the formation of a new crystalline structure. The addition of halloysite nanoclay improved the thermal stability and decreased the moisture absorption of the nano-biocomposites, whatever the type of plasticizer used. Halloysite addition led to more pronounced improvement in mechanical properties for glycerol plasticized system compared to nanocomposites based on sorbitol and glycerol/sorbitol systems with a 47% increase in tensile strength for glycerol-plasticized starch compared to 10.5% and 11% for sorbitol and glycerol/sorbitol systems, respectively. The use of a mixture of polyols was found to be a promising way to optimize the mechanical properties of these starch-based nanocomposites.
通过与不同的多元醇增塑剂（如甘油、山梨醇或两者的混合物）进行熔融共混，制备了基于埃洛石纳米粘土和马铃薯淀粉的纳米生物复合材料。研究了增塑剂类型和粘土含量对马铃薯淀粉/埃洛石纳米生物复合材料的影响。扫描电子显微镜（SEM）分析结合衰减全反射傅里叶变换红外光谱（ATR-FTIR）结果表明，高含量的山梨醇对埃洛石纳米粘土在淀粉基质中的分散有负面影响。X射线衍射（XRD）结果表明，将埃洛石纳米粘土掺入甘油增塑的淀粉体系中明显导致形成一种新的晶体结构。无论使用何种增塑剂类型，添加埃洛石纳米粘土都提高了纳米生物复合材料的热稳定性并降低了其吸湿性。与基于山梨醇和甘油/山梨醇体系的纳米复合材料相比，添加埃洛石对甘油增塑体系的机械性能有更显著的改善，甘油增塑淀粉的拉伸强度提高了47%，而山梨醇和甘油/山梨醇体系分别提高了10.5%和11%。发现使用多元醇混合物是优化这些淀粉基纳米复合材料机械性能的一种有前景的方法。
