Page 68 - 精细化工2019年第10期
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第 36 卷第 10 期 精 细 化 工 Vol.36, No.10
2019 年 10 月 FINE CHEMICALS Oct. 2019
功能材料
藏药红景天多糖基抗菌可食膜的制备
祁小妮,马建元,夏世英,李红梅,马永祥
(甘肃民族师范学院 化学与生命科学系,甘肃 合作 747000)
摘要:以藏药红景天(RP)作为研究对象,以乙醇/硫酸铵双水相体系(EAS)作为活性提取试剂,以提取的红
景天多糖作为天然绿色抑菌活性因子,以甘油(Gly)为增塑剂、明胶(Gel)为成膜剂、氯化钙为交联剂,采
用斜面自然倾倒流延法,制备了一种新型的抗菌膜材料。以抗菌膜的抗拉强度、抑菌活性、水蒸气透过率,包
肉降解特性作为膜材料的评价指标,考察了成膜材质的最佳添加量。抑菌实验结果表明,当红景天多糖加入量
为 6 mL(W RP =14.6%)时,抗菌膜材料对金黄色葡萄球菌和大肠杆菌的最大抑制率分别为 97.3%和 88.6%。抗
拉强度、水蒸气透过率以及包肉降解特性实验结果表明:当添加多糖 6 mL、甘油 1.5 g、明胶 1.0 g、氯化钙 0.8 g
时制备的抗菌膜性能最好。
关键词:红景天;多糖;抗菌性;可食膜;功能材料
中图分类号:TS206.4 文献标识码:A 文章编号:1003-5214 (2019) 10-2034-06
Preparation of Antibacterial and Edible Films Based on Tibetan
Medicine Rhodiola Rosea Polysaccharides
QI Xiao-ni, MA Jian-yuan, XIA Shi-ying, LI Hong-mei, MA Yong-xiang
(Department of Chemistry and Life Sciences, Gansu Normal University for Nationalities, Hezuo 747000, Gansu,
China)
Abstract: Rhodiola rosea polysaccharides were extracted from the aqueous two phase system of ethanol/
ammonium sulphate as a active reagent and used as a natural antimicrobial active factor. A novel
antibacterial film was prepared by solvent-casting method using glycerinum as plasticizer, gelatin as
filmogen and calcium chloride as cross-linking agent. The strength of extension, antibacterial activity,
moisture-vapor transmission and degradation properties of film were used as indexs of evaluation to
investigate the optimal addition of raw materials. The antimicrobial results showed that when the additive
amount of rhodiola rosea polysaccharides was 6 mL (W RP=14.6%), the prepared antibacterial film had
inhibition rates against Staphylococcus aureus and Bacillus subtilis of 97.3% and 88.6%, respectively. The
other tests results suggested that when the optimal additions of polysaccharides, glycerinum, gelatin and
calcium chloride were 6 mL, 1.5 g, 1.0 g and 0.8 g, the antibacterial film exhibited the best comprehensive
properties.
Key words: Rhodiola rosea; polysaccharides; antimicrobial properties; edible film; functional materials
食品包装材料在食品贮藏和保鲜运输过程中, 间保鲜,其有害物质的残留也会给人体健康带来一
[2]
起着非常重要的作用。目前,在食品运输过程中, 定的危害 ;气调保鲜虽然能够克服化学防腐剂保
主要采用的贮藏保鲜方法有冷藏保鲜、化学防腐剂 鲜的缺点,但需要高昂的前期设备费用,也不适用
[3]
保鲜、气调保鲜、辐照保鲜等。其中,冷藏保鲜需 于常规保鲜技术的应用 ;尽管辐照保鲜能够杀灭
[1]
要较为昂贵的大型制冷设备,维护成本高 ;另外, 微生物,延缓食品变质,但如果使用的辐照剂过高
[4]
利用化学手段,加入防腐剂的方法对果蔬进行短时 可能会产生放射线污染及有害物质 。因此,寻求
收稿日期:2018-11-08; 定用日期:2019-05-30; DOI: 10.13550/j.jxhg.20180821
基金项目:甘肃省高等学校科研项目资助(2016A-093);甘肃民族师范学院院长基金(17-08)
作者简介:祁小妮(1987—),女,硕士,讲师,E-mail:xiaoniqiyjs@126.com。