摘要
采用碱-过氧化氢法从玉米麸皮中提取碱溶性阿拉伯木聚糖(AX),然后分别用1-溴代丁烷、1-溴代十二烷和1-溴代十六烷对其进行疏水改性得到两亲性的烷基化阿拉伯木聚糖(C_n-AX)。利用荧光分子探针、动态光散射、扫描电子显微镜和流变仪对C_n-AX水溶液的性质进行研究,发现Cn-AX在一定质量浓度时水溶液中形成缔合聚集体。疏水缔合使C_n-AX水溶液的黏度高于AX水溶液。此外,通过制备一系列O/W型乳液,对AX和C_n-AX的乳化能力进行了评价。结果表明,乳液的稳定性受C_n-AX的烷基链长度和质量分数的影响,并且C_(16)-AX的乳化性能优于常用的Tween 80。
Alkali-soluble arabinoxylan（ AX） was extracted from corn bran by alkali-hydrogen peroxide method. Then,the amphiphilic alkylated arabinoxylans（ C_n-AX） were obtained by hydrophobic modification of the AX with 1-bromobutane,1-bromododecane,and 1-bromohexadecane,separately. Performance of aqueous solution of the AX and hydrophobic modified AX（ the C_n-AX） was investigated by fluorescent molecular probe,dynamic light scattering,scanning electron microscopy,and rheometer. Results show that the C_n-AX can form associated aggregates above a certain mass concentration in solution. The hydrophobic association led to a higher viscosity of the aqueous solutions of C_n-AX than that of aqueous solution of AX. In addition,the emulsifying power of the AX and C_n-AX was evaluated by preparing a series of oil-in-water emulsions. Results show that their emulsion stability is influenced by the length of alkyl chain and the mass fraction of the C_n-AX. The emulsifying power of C_n-AX prepared with 1-bromohexadecane is better than that of Tween 80,which is commonly used.
作者
陈凤凤
杨成
CHEN Feng- feng,YANG Cheng(School of Chemical ＆ Material Engineering,Jiangnan University,Wuxi,Jiangsu 214122,Chin)
出处
《日用化学工业》
CAS
CSCD
北大核心
2018年第3期134-139,共6页
China Surfactant Detergent & Cosmetics
关键词
阿拉伯木聚糖
疏水改性
两亲性
疏水缔合
乳化能力
arabinoxylan
hydrophobic modification
amphipathy
hydrophobic association
emulsifying power
