姜黄素增强的纤维素光敏抗菌膜制备及其对鲜猪肉的保鲜性能  

Preparation of Curcumin-Reinforced Photosensitive Antibacterial Cellulose Film and Its Performance in Fresh Pork Preservation

作　　者：张宇婷 陈岩 智秀娟[1] 杜斌[1] ZHANG Yuting;CHEN Yan;ZHI Xiujuan;DU Bin(Key Laboratory of Agricultural Product Processing and Quality Control,Ministry of Agriculture and Rural Affairs,College of Food Science and Engineering,Beijing University of Agriculture,Beijing 102206,China)

机构地区：[1]北京农学院食品科学与工程学院,农业农村部农产品加工与品质控制重点实验室,北京102206

出　　处：《食品科学》2024年第13期239-246,共8页Food Science

基　　金：国家自然科学基金面上项目(21772014);北京市教委科研计划项目(KM202010020003)。

摘　　要：本研究制备含有姜黄素且具有良好力学性能、耐水性、光敏抗菌性和高氧气阻隔性的纤维素薄膜(cellulose-curcumin-film,C-Cu_(x)-F)(x=0、0.1、0.5和1)。由于姜黄素与纤维素分子链的强相互作用,姜黄素可以显著提高纤维素薄膜的力学性能和抗水性。姜黄素掺杂含量显著影响纤维素薄膜的透氧性(P<0.05),随着姜黄素含量的增加,薄膜氧气透过率逐渐减小。在室温23℃条件下,当姜黄素质量分数分别为0%、0.1%、0.5%和1%时,纤维素膜的透氧率分别为(29.71±1.66)、(4.79±0.13)、(3.52±0.45)cm^(3)/(m^(2)·d)与(0.90±0.09)cm^(3)/(m^(2)·d)。在0%~0.5%范围内,由于分子间作用力的增强,姜黄素的加入可显著降低纤维素薄膜的透水率(P<0.05)。由于姜黄素的光敏作用产生单线态氧,纤维素薄膜对金黄色葡萄球菌具有良好的光敏抗菌作用,而且抗菌性能随着光照时间的延长而增强。在60 mW/cm^(2)的白光照射10 min后,薄膜C-Cu1-F对金黄色葡萄球菌的抑制率约为(61.00±1.73)%,照射20 min达到(91.67±1.53)%。在冷鲜猪肉的包装保鲜中,薄膜C-Cu1-F能显著抑制鲜猪肉总挥发性盐基氮的产生,降低菌落总数(P<0.05),对微生物和生物胺的产生有明显抑制作用。综上,该薄膜不仅具有优异的力学性能和抗菌性能,而且对鲜猪肉具有保鲜作用。In this study,cellulose films loaded with different concentrations(0%,0.1%,0.5%and 1%)of curcumin(C-Cux-F)having good mechanical properties,water resistance,photosensitive antibacterial properties,and high oxygen-barrier performance were successfully prepared.Due to its strong interaction with the cellulose chain,curcumin could significantly improve the mechanical properties and water resistance of cellulose film.The doping level of curcumin significantly affected the oxygen permeability of cellulose film(P<0.05).The oxygen permeability of the film gradually decreased with the increase in curcumin level.The oxygen permeability of the films loaded with 0%,0.1%,0.5%,and 1%curcumin was approximately(29.71±1.66),(4.79±0.13),(3.52±0.45),and(0.90±0.09)cm^(3)/(m^(2)·d)at room temperature(23℃),respectively.The addition of curcumin in the range of 0%to 0.5%significantly reduced the moisture permeability of cellulose film due to the enhancement of intermolecular forces(P<0.05).Curcumin-loaded cellulose film exhibited a good photosensitive antibacterial effect against S.aureus,which increased with the extension in light exposure time.This is probably ascribed to the fact that photosensitization of curcumin generates singlet oxygen.After white light exposure for 10 and 20 min at an intensity of 60 mW/cm^(2),the inhibitory activity of 1%curcumin-loaded cellulose film(C-Cu1-F)against S.aureus was(61.00±1.73)%and(91.67±1.53)%,respectively.In the preservation of fresh chilled pork,C-Cu1-F could significantly inhibit the production of total volatile basic nitrogen(TVB-N),and reduce the total bacterial count(P<0.05),implying a significant inhibitory effect on the growth of microorganisms and the production of biogenic amines.Therefore,curcumin-loaded cellulose film not only showed excellent mechanical and antibacterial properties,but also had a preservation effect on fresh pork.

关 键 词：纤维素薄膜 姜黄素 光敏抗菌效果 鲜肉保鲜 

分 类 号：TS251.51[轻工技术与工程—农产品加工及贮藏工程]