氦气冷等离子体对大米水分吸着等温线影响的研究  

Effect of Helium Cold Plasma on the Moisture Sorption Isotherms of Milled Rice

作　　者：曹子怡 李兴军 宋洪东 赵明慧 CAO Zi-yi;LI Xing-jun;SONG Hong-dong;ZHAO Ming-hui(Institute of Grain Storage and Logistic,Academy of National Food and Strategic Reserves Administration,Beijing 100037,China;National Engineering Research Center for Grain Storage and Transportation,Beijing 100037,China;College of Health Science and Engineering,University of Shanghai for Science and Technology,Shanghai 200093,China;College of Grain,Oil and Food,Henan University of Technology,Zhengzhou,Henan 450001,China)

机构地区：[1]国家粮食和物资储备局科学研究院粮食储运研究所,北京100037 [2]国家粮食储运工程研究中心,北京100037 [3]上海理工大学健康科学与工程学院,上海200093 [4]河南工业大学粮油食品学院,河南郑州450001

出　　处：《粮油食品科技》2023年第6期148-156,共9页Science and Technology of Cereals,Oils and Foods

基　　金：山东省农业重大应用技术创新项目子课题(SD2019ZZ012-5)。

摘　　要：我国在低压强射频冷等离子体发生设备的研发有20多年历史,该设备处理大米能够显著缩短蒸煮时间,提高粥中固形物溶解。最近5年冷等离子体技术在食品行业应用的安全性评价受到关注。本研究对120 W-20 s低压强射频氦气冷等离子体(140 Pa,13.56 MHz,冷等离子体源距离样品3 cm,每次处理样品300 g)重复处理圆粒大米0~4次后的样品,测定水分吸附和解吸等温线,在5~35℃、平衡相对湿度(ERH)10%~90%范围内,与对照样品比较,冷等离子体重复处理不改变大米的吸湿特性(单分子水层和多分子水层的特性)和安全水分值,但能显著降低大米的水分接触角而提高亲水性和大米吸水率。本研究为冷等离子体处理大米样品的安全储藏提供基础数据。The low-pressure radio-frequency(RF) cold plasma equipment has been developing in China for over 20 years.This equipment can significantly shorten rice cooking time and increase the solid solubility in the porridge.The safety evaluation of cold plasma technology in food industry is being carried out during the recent five years.This study measured the moisture desorption/adsorption isotherms of milled rice treated zero to four times by 120 W-20 s helium cold plasma(CP,140 Pa,13.56 MHz,the distance from plasma resource to the samples is 3 cm,300 g samples were treated each time).In the range of 5 to 45 ℃ and 10% to 90% RH,in contrast to the untreated samples,CP repeat treatments did not change the hygroscopic properties such as monolayer and multilayer moisture properties and the moisture content of safe storage,but they increased hydrophilicity and water absorption rate of milled rice with a significant decrease in water contract angle.This study gives basic data for the safe storage of CP-treated milled rice.

关 键 词：冷等离子体 氦气 大米 吸湿特性 安全水分 水分接触角 

分 类 号：TS201.4[轻工技术与工程—食品科学] S-3[轻工技术与工程—食品科学与工程]