Defence Food Research laboratory, Siddarthanagar, Mysore, 570 011, India.
Defence Food Research laboratory, Siddarthanagar, Mysore, 570 011, India.
Carbohydr Polym. 2014 May 25;105:285-92. doi: 10.1016/j.carbpol.2014.01.057. Epub 2014 Jan 31.
Hydroxypropyl methyl cellulose (HPMC) based hybrid nanocomposites reinforced with bacterial cellulose nanocrystals (BCNC) and silver nanoparticles (AgNPs) had been prepared and characterised. BCNC was capable of improving the tensile strength and modulus of HPMC, but they made the film more brittle. The addition of AgNPs along with BCNC, helped to regain some of the lost elongation properties without affecting other properties. Moisture sorption analysis proved that the hydrophilicity of the nanocomposite decreased considerably by the addition of these nanomaterials. Several mathematical models were also used to fit the experimental sorption results. A unique combination of two nanomaterials was highly effective in overcoming certain limitations of nanocomposites which uses only one type of nanomaterial. This type of hybrid nanocomposites with superior properties is expected to be useful in eco-friendly food packaging applications.
用细菌纤维素纳米晶体（BCNC）和银纳米粒子（AgNPs）增强的羟丙基甲基纤维素（HPMC）基杂化纳米复合材料已经制备并进行了表征。BCNC 能够提高 HPMC 的拉伸强度和模量，但会使薄膜更脆。加入 AgNPs 与 BCNC 一起，可以在不影响其他性能的情况下，恢复部分失去的伸长性能。吸湿分析证明，添加这些纳米材料后，纳米复合材料的亲水性大大降低。还使用了几种数学模型来拟合实验吸湿结果。两种纳米材料的独特组合在克服仅使用一种类型的纳米材料的纳米复合材料的某些限制方面非常有效。这种具有优异性能的杂化纳米复合材料有望在环保型食品包装应用中发挥作用。
