摘要:
乳状液粒径大小和分布与乳状液乳化特性有着密切的关系,为得到优良乳化特性麦麸阿拉伯木聚糖,以乳液平均粒径及分布为考察指标,研究了碱提温度、碱提时间、NaOH浓度和pH单因素对麦麸阿拉伯木聚糖乳状液粒径的影响,并采用正交实验方法对麦麸阿拉伯木聚糖的碱提工艺条件进行优化。结果表明,在碱提温度85 ℃、碱提时间180 min、NaOH浓度0.15 mol/L、pH4.3条件下,所提取麦麸阿拉伯木聚糖平均粒径为(0.4859±0.009) μm低于阿拉伯胶的(0.5494±0.013) μm,并具有相近的分布指数(0.147±0.015,0.113±0.016,p>0.05)。因此,通过优化提取条件,制备具有优于或接近阿拉伯胶的乳化性质的麦麸阿拉伯木聚糖是可行的,为阿拉伯木聚糖的工业生产提供理论参考。
Abstract:
The particle size and distribution of emulsions are closely related to the emulsifying properties of emulsions. In order to prepare arabinoxylan from wheat bran with excellent emulsifying properties,the average particle size and distribution were investigated to study the influence of temperature and time of alkaline extraction,concentration of NaOH and pH on the emulsion particle size of emulsion,and orthogonal experimental method was used to optimize the extraction conditions. Results indicated that when the extracting temperature 85 ℃,time 180 min,concentration of NaOH 0.15 mol/L,pH4.3 respectively,the arabinoxylan emulsion reached the minimum average particle size(0.4859±0.009 μm)lower than that of the Arabic gum(0.5494±0.013 μm),and with similar polydispersity index(0.147±0.015,0.113±0.016,p=0.208>0.05). Therefore,preparation of wheat bran arabinoxylan with an emulsifying property of superior or close to the Arabic gum by optimizing the extraction conditions is feasible and provide theoretical reference for industrial production of the arabinoxylan.
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