共查询到20条相似文献,搜索用时 15 毫秒
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Edible films were manufactured from rapeseed oil extraction residues. To prepare rapeseed protein (RP) films, various concentrations of plasticizers and emulsifiers were incorporated into the preparation of a film-forming solution. The optimal conditions for the preparation of the RP film were 2% sorbitol/0.5% sucrose as plasticizer and 1.5% polysorbate 20 as an emulsifier. In addition, RP blend films were prepared. Gelidium corneum or gelatin was added to improve the physical properties of the RP film, and the highest tensile strength value of the films was 53.45 MPa for the 3% RP/4% gelatin film. Our results suggest that the RP-gelatin blend film is suitable for applications in food packaging. PRACTICAL APPLICATION: Edible RP films prepared in the present investigation can be applied in food packaging. 相似文献
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可食性抗菌膜的研究进展 总被引:1,自引:0,他引:1
主要介绍了可食性抗菌膜的产生和可食性膜材料与抗菌剂的种类,阐述了在延长食品货架期方面,可食性膜材料对抗菌剂的缓释作用以及两者之间协同抗菌的互补作用,并且综述了该类膜产品在实际应用中存在的问题以及发展前景。 相似文献
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以乳清浓缩蛋白(WPC)为基料,通过添加羟丙基甲基纤维素(HPMC,添加量为蛋白质量的5%~25%)和转谷氨酰胺酶(TG酶)对膜的性能进行改良,研究HPMC的添加量和转谷氨酰胺酶的交联作用对复合膜性能的影响。结果表明:HPMC能显著提高蛋白膜的抗拉强度,降低复合膜的断裂伸长率(p<0.05),TG酶能有效改善乳清蛋白-羟丙基甲基纤维素复合膜的柔韧性。当HPMC的添加量为乳清蛋白的20%时,复合膜的抗拉强度较好,表观光滑平整。制备WPC-HPMC复合膜进行奶茶粉、方便面调料包、油包,苏打饼干的初步包装实验,研究了包装产品在储藏12 d期间质量变化情况。结论:乳清蛋白-羟丙基甲基纤维素复合膜具有一定包装应用潜能。 相似文献
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Cheng‐Pei Chen Be‐Jen Wang Yih‐Ming Weng 《International Journal of Food Science & Technology》2010,45(5):1050-1055
Edible antimicrobial aloe/gelatin composite films with different ratio of freeze–dried aloe leaf gel powder and gelatin (aloe/gelatin = 5/0, 4/1, 3/2, 2/3, 1/4 and 0/5) were fabricated. The thickness of the resulting films was between 0.055 (aloe/gelatin = 0/5) and 0.157 mm (aloe/gelatin = 4/1). The mechanical properties including maximum elongation, tensile strength, elongation at break and break strength were determined. The mechanical properties were increased with the increasing amount of gelatin used in the composite formulation. The tensile strength for composite films with the ratio of 4/1, 3/2, 2/3, 1/4 and 0/5 was 4.12, 5.29, 6.96, 11.47 and 37.76 MPa, respectively. Citrobacter freundii, Escherichia coli, Enterobacter aerogens, Serratia marcescens, Staphylococcus aureus and Bacillus cereus were used in antimicrobial activity test. The results showed that antimicrobial activities of the composite films increased as the amount of aloe gel powder used in the composite films increased. The average area of inhibitory zones for films with composition of aloe/gelatin = 1/4 and aloe/gelatin = 4/1 was 1.63–2.38 and 3.82–4.80 cm2, respectively. 相似文献