Poly(lactic acid)/bacterial cellulose nanocomposites were prepared by solvent casting. Aiming to reduce the incompatibility between polar bacterial cellulose (BC) and the nonpolar poly(lactic acid) (PLA) matrix which induces filler aggregation and poor reinforcement dispersion, BC was acetylated by the use of a non-conventional route catalyzed by citric acid. The derivatized BC (AcBC) was incorporated into de PLA matrix at varying filler loadings, and optical, morphological, structural, thermal, tensile and barrier (water vapor) properties of PLA/AcBC in comparison with PLA/BC were evaluated. Noticeable changes in the nanocomposite properties were ascribed to the success of the route proposed to surface hydrophobize BC, which significantly improved its dispersibility within the PLA matrix and the matrix-filler interaction. By the way, the variation of filler loading allowed attaining remarkable increases in the nanocomposite films stiffness without significant reductions in tensile strength and water vapor permeability.

通过溶剂浇铸制备聚乳酸/细菌纤维素纳米复合材料。为了减少极性细菌纤维素（BC）与非极性聚乳酸（PLA）基质之间的不相容性，从而导致填料聚集和增强剂分散性差，通过使用柠檬酸催化的非常规途径将BC乙酰化。将衍生的BC（AcBC）以不同的填料含量掺入de PLA基质中，并评估了PLA / AcBC与PLA / BC相比的光学，形态，结构，热，拉伸和阻隔（水蒸气）性能。纳米复合材料性能的显着变化归因于表面疏水化BC的提议路线的成功，这大大提高了其在PLA基质中的分散性以及基质与填料的相互作用。顺便说说，