柚子皮基香芹酚抗菌膜的制备及性能

为使柚子皮基膜获得抗菌活性,向其中添加香芹酚,通过流延法制备柚子皮基抗菌膜,研究香芹酚质量分数对膜的颜色、透光率、微观结构、水蒸气透过系数、力学性能和抗菌活性等的影响。结果表明:随着香芹酚质量分数的增加,柚子皮基抗菌膜的颜色逐渐偏黄;透光率、水蒸气透过系数和抗拉强度降低;而厚度、断裂伸长率和抗菌活性增加。综合分析结果可知,香芹酚质量分数为1.0%时的柚子皮基抗菌膜具有相对较好的综合性能,此时其膜厚度为(0.125±0.021)mm、抗拉强度为(12.53±0.72)MPa、断裂伸长率为(16.29±0.60)%、水蒸气透过系数为(4.06±0.25)×10~(-12)g·cm/(cm~2·s·Pa)、透光率为(49.97±0.38)%、对大肠杆菌和金黄色葡萄球菌的抑菌圈面积分别达到(377.62±19.63)mm~2和(506.82±11.28)mm~2。研究结果可为柚子皮基香芹酚抗菌膜的实际应用提供理论依据。

Preparation and Properties of Pomelo Peel Based Antimicrobial Films Containing Carvacrol

To prepare pomelo peel based antimicrobial films by the tape casting method, carvacrol was added as an antimicrobial agent to the film-forming solution. The effects of carvacrol addition on the color, light transmittance, microstructure, water vapor permeability, mechanical and antimicrobial properties of the films were investigated. The results indicated that the films gradually turned yellow, and the light transmittance, water vapor permeability and tensile strength were decreased with the addition of carvacrol, whereas the thickness, elongation at break, and antibacterial efficiency were increased. Based on the measurement results, pomelo peel based antimicrobial films with 1.0% of carvacrol had good overall performance, whose thickness, tensile strength, elongation at break water vapor permeability, light transmittance, and inhibition zone areas for Escherichia coli and Staphylococcus aureus were (0.125 ± 0.021) mm, (12.53 ± 0.72) MPa, (16.29 ± 0.60)%, (4.06 ± 0.25) × 10?12 g·cm/(cm2·s·Pa), (49.97 ± 0.38)%, (377.62 ± 19.63) mm2 and (506.82 ± 11.28) mm2, respectively. The results of this study can provide a theoretical basis for the application of pomelo peel based antimicrobial films added with carvacrol.