Instituto de Tecnología de Materiales, Universitat Politècnica de Valencia, 03801 Alcoy-Alicante, Spain; Analytical Chemistry, Nutrition and Food Sciences Department, University of Alicante, P.O. Box 99, E-03080 Alicante, Spain.
Materials Engineering Centre, UdR INSTM, NIPLAB, University of Perugia, 05100 Terni, Italy.
Carbohydr Polym. 2014 Jul 17;107:16-24. doi: 10.1016/j.carbpol.2014.02.044. Epub 2014 Feb 22.
Cellulose nanocrystals (CNCs) synthesized from microcrystalline cellulose by acid hydrolysis were added into poly(lactic acid)-poly(hydroxybutyrate) (PLA-PHB) blends to improve the final properties of the multifunctional systems. CNC were also modified with a surfactant (CNCs) to increase the interfacial adhesion in the systems maintaining the thermal stability. Firstly, masterbatch pellets were obtained for each formulation to improve the dispersion of the cellulose structures in the PLA-PHB and then nanocomposite films were processed. The thermal stability as well as the morphological and structural properties of nanocomposites was investigated. While PHB increased the PLA crystallinity due to its nucleation effect, well dispersed CNC and CNCs not only increased the crystallinity but also improved the processability, the thermal stability and the interaction between both polymers especially in the case of the modified CNCs based PLA-PHB formulation. Likewise, CNCs were better dispersed in PLA-CNCs and PLA-PHB-CNCs, than CNC.
通过酸水解从微晶纤维素合成的纤维素纳米晶体（CNC）被添加到聚（乳酸）-聚（羟基丁酸酯）（PLA-PHB）共混物中，以改善多功能系统的最终性能。CNC 也用表面活性剂（CNCs）进行了改性，以增加系统中界面的粘附力，同时保持热稳定性。首先，为每种配方获得母粒颗粒，以改善纤维素结构在 PLA-PHB 中的分散性，然后加工纳米复合材料薄膜。研究了纳米复合材料的热稳定性以及形态和结构性能。虽然 PHB 由于其成核作用而增加了 PLA 的结晶度，但分散良好的 CNC 和 CNCs 不仅增加了结晶度，而且提高了加工性能、热稳定性以及两种聚合物之间的相互作用，特别是在基于改性 CNCs 的 PLA-PHB 配方的情况下。同样，与 CNC 相比，CNC 在 PLA-CNCs 和 PLA-PHB-CNCs 中的分散性更好。
