Zakuwan Siti Zarina, Ahmad Ishak
School of Chemical Sciences and Food Technology, Faculty of Science and Technology, Universiti Kebangsaan Malaysia, 43600 Bangi Selangor, Malaysia.
Nanomaterials (Basel). 2018 Oct 24;8(11):874. doi: 10.3390/nano8110874.
The synergistic effect of using κ-carrageenan bionanocomposites with the hybridization of cellulose nanocrystals (CNCs) and organically modified montmorillonite (OMMT) reinforcements was studied. The effects of different reinforcements and filler contents were evaluated through mechanical testing, and morphological and water uptake properties. The tensile strength and Young's modulus of both bionanocomposites increased with filler loading and optimized at 4%. OMMT incorporation into the κ-carrageenan/CNCs bionanocomposites resulted in further mechanical property improvement with an optimum ratio of 1:1 (CNCs:OMMT) while maintaining high film transparency. X-ray diffraction and morphological analyses revealed that intercalation occurred between the κ-carrageenan bionanocomposite matrix and OMMT. The water uptake of the κ-carrageenan bionanocomposites was significantly reduced by the addition of both CNCs and OMMT. The enhancements in the mechanical properties and performance of the hybrid bionanocomposite indicate compatibility among the reinforcement, biopolymer, and well-dispersed nanoparticles. This renders the hybrid CNC/OMMT/κ-carrageenan nanocomposites extremely promising for food packaging applications.
研究了κ-卡拉胶生物纳米复合材料与纤维素纳米晶体（CNCs）和有机改性蒙脱石（OMMT）增强剂杂化使用的协同效应。通过力学测试以及形态和吸水性能评估了不同增强剂和填料含量的影响。两种生物纳米复合材料的拉伸强度和杨氏模量均随填料含量的增加而提高，并在4%时达到最佳值。将OMMT掺入κ-卡拉胶/CNCs生物纳米复合材料中，在保持高薄膜透明度的同时，以1:1（CNCs:OMMT）的最佳比例进一步改善了力学性能。X射线衍射和形态分析表明，κ-卡拉胶生物纳米复合材料基体与OMMT之间发生了插层。添加CNCs和OMMT均显著降低了κ-卡拉胶生物纳米复合材料的吸水率。混合生物纳米复合材料力学性能和性能的提高表明增强剂、生物聚合物和分散良好的纳米颗粒之间具有相容性。这使得混合CNC/OMMT/κ-卡拉胶纳米复合材料在食品包装应用中极具前景。
