Study on Preparation and Characterization of Low Methoxy Pectin/Chitosan Composite Membrane(低甲氧基果胶/壳聚糖复合膜的制备及特性研究)
Year: 2019
Type: article
Abstract: Low-methoxy pectin/chitosan composite membranes were prepared through the tape casting method. The formation mechanism of the composite membranes and effects of pectin, chitosan, and glycerol on the structure and properties of the membranes were discussed.The results showed that —COOH in pectin bounded to —NH2 in chitosan and promoted the formation of the composite membranes. The tensile strength and elongation at break of the composite membranes were increased firstly and then decreased with the increasing amount of pectin. And the composite membranes reached their maximum tensile strength (4.12MPa) and elongation at break (33.24%) when the addition of pectin was 4g. With the increasing chitosan addition, the elongation at break of the composites membranes was decreased, while the tensile strength was firstly increased and then decreased. The composites membranes attained its maximum tensile strength (4.13MPa)when the addition of chitosan was 4g. When the glycerol addition was 1mL, the composites membranes got a great tensile strength of 24.32MPa, with a poor elongation at break (4.86%). With the increase of glycerol addition, the tensile strength of the composites membranes was sharply decreased, while the elongation at break was rapidly increased.(通过流延法制备了低甲氧基果胶/壳聚糖复合膜,研究了复合膜的形成机理,并探讨了果胶添加量、壳聚糖添加量以及甘油添加量对复合膜结构与性能的影响。实验结果表明,果胶中的—COOH和壳聚糖的—NH2结合并促进成膜；随着果胶添加量的增加,复合膜的拉伸强度和断裂伸长率均呈现先上升后下降的趋势,其添加量均为4g时,复合膜的拉伸强度和断裂伸长率达到最大,分别为4.12MPa和33.24%；当壳聚糖添加量增加时,复合膜的拉伸强度同样先上升后下降,在添加量为4g时拉伸强度达到最大,为4.13MPa,而断裂伸长率却一直降低；当甘油添加量为1mL时,复合膜拉伸强度极大,达到24.32MPa,但断裂伸长率极低,仅为4.86%,随着甘油添加量增加,复合膜的拉伸强度急剧降低,而断裂伸长率迅速上升。)
Institution: Minnan Normal University
Language: Chinese
Subfield: Biomaterials
Field: Materials Science
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W7147056103