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RHEOLOGICAL PROPERTIES AND OILINESS OF MONODISPERSED EMULSION GEL

单分散乳液凝胶的流变性能和油性

基本信息

批准号：
09660140
负责人：
GOHTANI Shoichi
金额：
$ 2.18万
依托单位：
Kagawa University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
1997
资助国家：
日本
起止时间：
1997 至 1998
项目状态：
已结题

项目摘要

Effects oil droplets in an agar gel matrix were investigated by mechanical analysis and sensory evaluation. The stability and uniformity of monodispersed o/w emulsion with mean droplet diameter of 1.5, 3.3, 6.5 and 12.2 mum were confirmed during successive stages of gel preparation. Effects of oil droplets in an agar gel matrix were investigated by mechanical analysis under large and small-deformations. Under large deformation, the effects of oil droplets on gel strength were examined by compressive and puncture test. Thc compressive strength of the emulsion gels decreased with both increases in oil droplet size and oil volume fraction, while the puncture strength of the emulsion gel did not change with an increase in oil droplet size. For small-deformation test, creep behaviors and dynamic vicoelastic properties of emulsion gels were evaluated. Both the determined values by small-deformation test for the emulsion gels were almost constant for increasing oil droplet size. Thus, to demonstrate effects of oil droplets on emulsion gel, compression measurements under large-deformation arc useful to discriminate the oil droplet size on the rheological properties of emulsion gel.Sensory evaluation for emulsion gels containing the oil droplets with mean droplet diameter of 1.5, 6.5 and 12.2 mum was performed by the paired comparison method. The evaluation panels were coin posed of 18 laboratory students. Results of sensory evaluation showed that the sample containing small oil droplets was harder than that with large oil droplets. And the large oil droplets sample was oilier than that with small oil droplets.

通过机械分析和感官评价研究了琼脂凝胶基质中油滴的影响。在凝胶制备的连续阶段中证实了平均液滴直径为1.5、3.3、6.5和12.2μm的单分散o/w乳液的稳定性和均匀性。通过大变形和小变形下的力学分析研究了琼脂凝胶基质中油滴的影响。在大变形条件下，通过压缩和穿刺试验考察了油滴对凝胶强度的影响。乳液凝胶的抗压强度随着油滴尺寸和油体积分数的增加而降低，而乳液凝胶的穿刺强度不随着油滴尺寸的增加而变化。对于小变形试验，评估了乳液凝胶的蠕变行为和动态粘弹性。对于乳液凝胶的小变形试验测定的两个值对于油滴尺寸的增加几乎是恒定的。因此，为了证明油滴对乳液凝胶的影响，大变形下的压缩测量有助于区分油滴尺寸对乳液凝胶流变性质的影响。采用配对比较法对含有平均液滴直径为1.5、6.5和12.2μm的油滴的乳液凝胶进行感官评价。评估小组由 18 名实验室学生组成。感官评价结果表明，含有小油滴的样品比含有大油滴的样品更硬。大油滴样品比小油滴样品油性更高。