Fisiología y Tecnología de Alimentos de la Zona Templada, Centro de Investigación en Alimentación y Desarrollo, A.C.-Unidad Cuauhtémoc, Av. Río Conchos s/n, Parque Industrial, Apartado postal 781, C.P. 31570 Ciudad Cuauhtémoc, Chihuahua, Mexico.
Fisiología y Tecnología de Alimentos de la Zona Templada, Centro de Investigación en Alimentación y Desarrollo, A.C.-Unidad Cuauhtémoc, Av. Río Conchos s/n, Parque Industrial, Apartado postal 781, C.P. 31570 Ciudad Cuauhtémoc, Chihuahua, Mexico.
Int J Biol Macromol. 2020 Oct 1;160:953-963. doi: 10.1016/j.ijbiomac.2020.05.255. Epub 2020 Jun 1.
Insects are considered as alternative sources of chitosan; however, studies about the functional film-forming properties of insect chitosan are scarce. Insect chitosan films were made from Tenebrio molitor and Brachystola magna and were compared with commercial chitosan of different molecular weights (M). Mechanical properties (tensile strength, TS; elastic modulus, EM; elongation at break, %E), water vapor permeability (WVP) and physicochemical properties were characterized. The film properties of both commercial and insect chitosan were affected by M. Commercial chitosan films showed that at lower M the TS (from 59 to 48 MPa) and EM (from 1471 to 1286 MPa) decreased; whereas WVP (from 2.9 × 10 to 3.4 × 10 g msPa), % E (from 38 to 41%) and solubility (from 30 to 33%) increased. Chitosan insect films showed lower TS and EM, and higher WPV, %E and solubility than commercial films. SEM revealed that chitosan insect films had lower porosity than commercial films. FTIR and X-ray diffraction showed not difference between insect and commercial chitosan films. These results showed that T. molitor and B. magna chitosan films could be used as a packaging material in several food products.
昆虫被认为是壳聚糖的替代来源；然而，关于昆虫壳聚糖的功能成膜特性的研究还很少。本文使用黄粉虫和大蜡螟的壳聚糖制备了壳聚糖薄膜，并与不同分子量（M）的商业壳聚糖进行了比较。对其力学性能（拉伸强度、拉伸弹性模量、断裂伸长率）、水蒸气透过率（WVP）和物理化学性质进行了表征。商业壳聚糖和昆虫壳聚糖的膜性能均受 M 的影响。商业壳聚糖膜的结果表明，在较低的 M 下，拉伸强度（从 59 至 48 MPa）和拉伸弹性模量（从 1471 至 1286 MPa）降低；而水蒸气透过率（从 2.9×10 至 3.4×10 g m sPa）、断裂伸长率（从 38 至 41%）和溶解度（从 30 至 33%）增加。昆虫壳聚糖膜的拉伸强度和拉伸弹性模量均低于商业膜，而水蒸气透过率、断裂伸长率和溶解度则较高。SEM 表明昆虫壳聚糖膜的孔隙率低于商业膜。FTIR 和 X 射线衍射表明昆虫和商业壳聚糖膜之间没有差异。这些结果表明，黄粉虫和大蜡螟的壳聚糖薄膜可以用作几种食品的包装材料。
