生物可降解聚乳酸薄膜对白玉菇保鲜效果研究  

Effect of Biodegradable Poly(Lactic Acid) Film Packaging on Preservation of White Hypsizygus marmoreus

作　　者：付正义[1] 张一珠 李伟[1] 顾岩岩[1] 程树军[1] 陆冲[1] 

机构地区：[1]华东理工大学材料科学与工程学院,上海200237

出　　处：《食品工业》2016年第9期136-140,共5页The Food Industry

摘　　要：用生物可降解聚乳酸(PLA)薄膜包装蟹味菇,放置于25℃、相对湿度(RH)80%环境储藏,对照组设置以聚乙烯(PE)薄膜包装,25℃、相对湿度(RH)80%储藏和无包装室温储藏,研究PLA薄膜对蟹味菇保鲜效果的影响。相同时间间隔内评定蟹味菇感官,检测失重率、可溶性固体物、游离氨基酸、丙二醛(MDA)、褐变度等品质指标以及包装袋内O_2、CO_2体积分数。结果表明,第6天PLA包装白玉菇褐变度4.7,低于PE包装的6.8;可溶性固体物PLA包装是1.3%,优于PE包装0.7%;游离氨基酸PLA包装是30.1 mg/100 g,高于PE包装10.8 mg/100 g;丙二醛含量PLA包装是5.8 nmol/g FW,低于PE包装7.7 nmol/g FW。无包装、PE和PLA包装分别可以保存白玉菇1,3和6 d,PLA薄膜包装能明显延长白玉菇货架期。The White Hypsizygus marmoreus was packaged under air with polylactic acid （PLA） film and stored at 25 ℃, 80% relative humidity （RH）. The White Hypsizygus marmoreus packaged with polyethylene （PE） film, stored under the same condition and without packaging, placed under room condition were used as conlrols. The effect of PLA packaging on the preservation of white Hypsizygus marmoreus was evaluated by analyzing sensory quality and biochemical properties of white Hypsizygus marmoreus. The mushroom quality parameters including volume fraction, weight loss, browning degree, soluble solid, free amino acids, malondialdehyde （MDA） were studied. The results indicated that the storage time of white Hypsizygus marmoreus packaged without film, with PE film and PLA film were 1, 3 and 6 d respectively. The browning degree of white Hypsizygus marmoreus with PLA-packaging was 4.7, lower than that with PE-packaging which was 6.8. In addition, the content of soluble solids and free amino acid of white Hypsizygus marmoreus packaged with PLA film were 1.3% and 30.1 mg/100 g respectively, which exhibited the enhancement to 0.7% and 10.8 mg/100 g of white Hypsizygus marmoteus packaged with PE film. Further more, the MAD of white Hypsizygus marmoreus with PLA-packaging was 5.8 nmol/g FW, lower than that with PE-packaging was 7.7 nmol/g FW. Compared with no packaging and PE packaged, the white Hypsizygus marmoreus packaged with PLA had better quality on browning degree and less rotting rate. The PLA film could extend the shelf-life of white Hypsizygus marmoreus.

关 键 词：PLA薄膜 白玉菇 品质 货架期 

分 类 号：TS219[轻工技术与工程—粮食、油脂及植物蛋白工程]