Faculty of Engineering and Agro-Industry, Maejo University, Chiang Mai 50290, Thailand.
MTEC, National Science and Technology Development Agency (NSTDA), Pathumthani 12120, Thailand.
Molecules. 2020 Jun 16;25(12):2777. doi: 10.3390/molecules25122777.
Generally, natural rubber/chitosan (NR/CT) biocomposites could be prepared by either mixing natural rubber latex (NRL) with CT acid solution or mixing dry NR with CT powder on mixing equipment. In the present work, a new mixing method has been proposed and properties of the obtained NR/CT biocomposites are investigated. CT particles were prepared to have a negative charge that could be dispersed in water by using a ball mill before mixing with NRL. The effects of CT loading varied from 0 to 8 phr on latex properties and physical properties of NR/CT biocomposite films were focused. The results showed that the viscosity of NRL increased with increasing CT loading. With increasing CT loading from 0 to 8 phr, 300% modulus of the NR/CT biocomposite film increased, whereas the opposite trend was found for elongation at break. Additionally, the presence of CT in the biocomposite resulted in an increased elastic modulus (E') in conjunction with enhanced antibacterial activity against ().
通常，天然橡胶/壳聚糖（NR/CT）生物复合材料可以通过将天然橡胶胶乳（NRL）与 CT 酸溶液混合，或者在混合设备上混合干燥的 NR 和 CT 粉末来制备。在本工作中，提出了一种新的混合方法，并研究了所得到的 NR/CT 生物复合材料的性能。在与 NRL 混合之前，使用球磨机将 CT 颗粒制备成带负电荷的颗粒，以便在水中分散。研究了 CT 负载量从 0 到 8phr 对胶乳性能和 NR/CT 生物复合材料薄膜物理性能的影响。结果表明，随着 CT 负载量的增加，NRL 的粘度增加。随着 CT 负载量从 0 增加到 8phr，NR/CT 生物复合材料薄膜的 300%模量增加，而断裂伸长率则呈现相反的趋势。此外，生物复合材料中 CT 的存在导致弹性模量（E'）增加，同时对（）的抗菌活性增强。
