摘要
在12%的漂白紫胶溶液中加入精制漆蜡乳液制备漆蜡复配涂膜保鲜剂,测试了其抑菌性能,并用于柑桔的涂膜保鲜。通过考察复配涂膜保鲜剂的稳定性,得到漆蜡复配涂膜保鲜剂的主要制备条件为:紫胶12%,漆蜡加入量1%~3%,搅拌速度900 r/min,分散时间15 min。抑菌性能测试结果表明:当复配液中漆蜡加入量为2%时,复配涂膜液对金黄色葡萄球菌、枯草芽孢杆菌和表皮葡萄球菌的抑菌性能最佳,抑菌率分别为24.3%、26.5%和25.2%,且较单一紫胶溶液抑菌率(17.3%、16.3%和15.5%)分别提高了40.5%、62.6%和62.6%。该复配保鲜剂对柑橘具有明显的保鲜效果,有效地延长了果实的贮藏保鲜期,经复配涂膜保鲜剂处理的柑橘室温储藏20天,其腐烂指数仅1.0%,储藏60天后,其腐烂指数为10.0%,较空白对照组(38.4%)和紫胶涂膜处理组(18.6%)分别降低了28.4和8.6个百分点,差异极显著(P<0.01)。
Lacquer wax composite coating preservatives were made by adding different amounts of lacquer wax into 12%bleached shellac and used for the preservation of ponkan,and the antibacterial test of the preservatives was carried out as well.By investigating the stability of coating film,the optimized preparation conditions of lacquer wax composite coating wax were as follows:12.0%shellac,1%-3%lacquer wax,stirring speed of 900 r/min,and dispersing time of 15 min.The results of antibacterial test showed that the antibacterial effects of the composite coating film on Staphylococcus aureus,Bacillus subtilis and Staphylococcus epidermidis were the best under the conditions of the amount of lacquer wax 2%,and the inhibitory rates were 24.3%,26.5%and 25.2%,respectively,which were higher than those of the shellac coating(the inhibition rates increased by 40.5%,62.6%and 62.6%,respectively).The composite coating film displayed obvious preservation effects on the ponkan and effectively prolonged the preservation period.After storage for 20 days at room temperature,the rot rate of the samples treated by composite coating was only 1.0%.When the treated ponkan were stored for 60 d,the rot rate of treated samples was 10.0%,compared with the blank control(38.4%)and shellac coating samples(18.6%),the rot rate was lower by 28.4 and 8.6 percent point,respectively(P<0.01).
作者
薛兴颖
周昊
张昌伟
陈虹霞
王成章
XUE Xingying;ZHOU Hao;ZHANG Changwei;CHEN Hongxia;WANG Chengzhang(Institute of Chemical Industry of Forest Products,CAF,National Engineering Lab.for Biomass Chemical Utilization,Key Lab.of Chemical Engineering of Forest Products,National Forestry and Grassland Administration,Key Lab.of Biomass Energy and Material,Jiangsu Province,Nanjing 210042,China;Research Institute of Forestry New Technology,CAF,Beijing 100091,China;Nanjing Zhongsen Biological Technology Co.,Ltd.,Nanjing 210042,China)
出处
《林产化学与工业》
EI
CAS
CSCD
北大核心
2019年第3期123-128,共6页
Chemistry and Industry of Forest Products
基金
中国林科院中央级公益性科研院所基本科研业务费专项资金(CAFYBB2018ZB009)
关键词
漆蜡
紫胶
抗菌性
保鲜
lacquer wax
shellac
antibacterial activity
preservation
