Biorefinery Processes Research Group, Chemical & Environmental Engineering Department, University of the Basque Country UPV/EHU, Plaza Europa 1, 20018 Donostia, Spain.
Biorefinery Processes Research Group, Chemical & Environmental Engineering Department, University of the Basque Country UPV/EHU, Plaza Europa 1, 20018 Donostia, Spain.
Carbohydr Polym. 2016 Jun 25;144:41-9. doi: 10.1016/j.carbpol.2016.02.024. Epub 2016 Feb 10.
Cellulose nanofibers and chitin nanocrystals, two main components of agricultural and aquacultural by-products, were obtained from blue agave and yellow squat lobster industrial residues. Cellulose nanofibers were obtained using high pressure homogenization, while chitin nanocrystals were obtained by hydrolysis in acid medium. Cellulose nanofibers and chitin nanocrystals were characterized by X-ray diffraction, Atomic Force Microscopy and Infrared spectroscopy. Self-bonded composite films with different composition were fabricated by hot pressing and their properties were evaluated. Antifungal activity of chitin nanocrystals was studied using a Cellometer(®) cell count device, mechanical properties at tension were measured with a universal testing machine, water vapor permeability was evaluated with a thermohygrometer and surface tension with sessile drop contact angle method. The addition of chitin nanocrystals reduced slightly the mechanical properties of the composite. Presence of chitin nanocrystals influenced the growth of Aspergillus sp fungus in the surface of the composites as expected.
从龙舌兰和黄褐龙虾工业废料中获得了纤维素纳米纤维和壳聚糖纳米晶体，这两种物质是农业和水产养殖副产物的主要成分。使用高压匀浆法获得纤维素纳米纤维，而通过酸介质中的水解获得壳聚糖纳米晶体。通过 X 射线衍射、原子力显微镜和红外光谱对纤维素纳米纤维和壳聚糖纳米晶体进行了表征。通过热压制备了具有不同组成的自结合复合膜，并对其性能进行了评估。使用 Cellometer（®）细胞计数仪研究了壳聚糖纳米晶体的抗真菌活性，使用万能试验机测量了拉伸力学性能，使用热湿计评估了水蒸气透过率，使用固着液滴接触角法测量了表面张力。壳聚糖纳米晶体的添加略微降低了复合材料的力学性能。如预期的那样，壳聚糖纳米晶体的存在影响了复合材料表面曲霉属真菌的生长。
