共查询到20条相似文献,搜索用时 62 毫秒
1.
为扩大椰子油的应用范围,以精制冷榨椰子油为油相,Tween 80为乳化剂,无水乙醇为助乳剂,采用超声乳化法制备椰子油纳米乳液。以椰子油纳米乳液平均粒径及多分散指数(PDI)为指标,通过单因素实验和正交实验对椰子油纳米乳液制备工艺条件进行优化,并对制备的椰子油纳米乳液的类型进行鉴定。结果表明:椰子油纳米乳液最佳制备工艺条件为超声功率500 W、超声时间20 min、油乳质量比1∶ 1.5、油乳混合物与水质量比2∶ 8,在此条件下制得的纳米乳液平均粒径和PDI分别为131.0 nm和0.27;制得的椰子油纳米乳液为水包油(O/W)型。该工艺条件下制得的椰子油纳米乳液粒径小且均匀,且O/W型的椰子油纳米乳液拓宽了椰子油的应用范围。 相似文献
2.
为探究超声辅助制备壳寡糖稳定的Pickering乳液的最佳工艺及其稳定性,本文以壳寡糖、果胶为Pickering颗粒原料,以葵花籽油为油相,选取乳化活性指数(EAI)和乳化稳定性指数(ESI)为指标,通过单因素实验和响应面优化超声辅助制备壳寡糖-果胶稳定的Pickering乳液的工艺条件,并考察优化条件下乳液的稳定性。结果表明,壳寡糖-果胶稳定的Pickering乳液的最佳制备工艺为:壳寡糖与果胶质量比为0.05,溶液pH为5.22,油相体积分数为32%,超声功率为350 W,该优化条件下制备的乳液EAI为(5.129±0.003)m2/g,ESI为(796.68±4.43)min;稳定性实验及乳液内部显微结构观察表明,乳液在25~50℃和0~100 mmol/L盐离子(NaCl)条件下具有良好的乳化稳定性。因此,结合超声技术辅助优化获得的新型Pickering乳液,改善了乳液的乳化特性,为壳寡糖Pickering颗粒制备及其应用提供了参考。 相似文献
3.
4.
5.
通过配方设计,原料选择和制备工艺的控制,制备了聚氨酯乳液涂饰剂。讨论了一NCO含量、MDI/TDI配比、小分子聚醚多元醇N210/N220等对聚氨酯乳液性能的影响。 相似文献
6.
7.
目的 为解决人参皂苷可溶性差,口服生物利用度低的问题, 研制一种基于乳清分离蛋白和菊粉负载人参皂苷的Pickering乳液。 方法 以乳清分离蛋白与菊粉复合溶液为水相,大豆油为油相,应用超声和均质处理方法制备负载人参皂苷的Pickering乳液。通过单因素试验考察乳清分离蛋白与菊粉的质量分数比、超声功率、超声时间、均质时间对人参皂苷乳液粒径的影响, 利用Box-Behnken试验设计和响应面分析确定人参皂苷Pickering乳液的制备工艺。结果 对人参皂苷Pickering乳液粒径的影响程度从大到小依次为超声时间、均质时间、超声功率。优化的制备工艺参数:超声功率为270 W、超声时间为15 min、均质时间为6min, 乳清分离蛋白与菊粉的质量分数比1:1。在优化条件下制备的人参皂苷Pickering乳液粒径最小为(318.73±1.24))nm。然后将在最优工艺制备的人参皂苷Pickering乳液进行真空冷冻干燥,制成人参皂苷冻干粉,测定其溶解性、分散性、冲调性及感官特性,发现人参皂苷冻干粉末作为固体饮料具备优良的食用性质。结论 应用超声辅助均质处理,制备基于乳清分离蛋白和菊粉负载人参皂苷的Pickering乳液工艺可行,为进一步构建人参皂苷纳米输送体系和功能食品研发奠定基础。 相似文献
8.
优化工艺制备改性松香和苯乙烯-丙烯酸丁酯乳液,二者与松香、松香甘油酯进一步制备改性松香丙烯酸酯乳液.利用改性松香丙烯酸酯乳液对纸张进行表面施胶,探讨了改性松香丙烯酸酯乳液和氧化淀粉、聚乙烯醇、PAE等配合使用对纸张性能的影响. 相似文献
9.
阳离子石蜡乳液的制备及其在中性施胶和表面涂饰中的应用 总被引:12,自引:1,他引:12
石蜡乳液是一类重要的中性施胶剂,但一直存在难乳化,乳液稳定性差,单独进行中性施胶时效果差等问题,我们探讨了各种因素对石蜡乳液稳定性和应用性的影响,制备出一种稳定且具有良好中性施胶性能的阳离子石蜡乳液,确定了其最佳施胶工艺。 相似文献
10.
11.
12.
13.
Nisin is an amphiphilic, antimicrobial peptide that has found application as a preservative in the food industry. Evaluation of nisin as an emulsifier was accomplished by measuring its ability to stabilize dispersed oil droplets in water. This was achieved by monitoring the time-dependent electrical conductivity of the dispersion. Nisin solutions at concentrations of 0.1, 0.5, 1, 5, and 10 mg/ml were used to prepare emulsions, by homogenization of a volume of nisin solution and corn oil. While nisin showed significant emulsifying capacity in comparison to Tween® 80 and β-casein, its emulsifying properties were found to be highly concentration- and pH-dependent. 相似文献
14.
本文采用预乳化种子半连续乳液聚合法对进行丙烯酸酯/苯乙烯乳液聚合,并考察了种子预乳液用量、顶底料中乳化剂用量与配比及不同类型乳化剂配伍对乳胶粒径与乳液稳定性的影响和加料方式对聚合动力学行为的影响。 相似文献
15.
16.
通过种子乳液聚合的方法,得到了一种色涂粘合剂,分析了乳化剂、单体、引发剂和工艺对乳液性能的影响,确定了合成工艺路线,并通过实际应用,验证了自制色涂粘合剂的使用性能。 相似文献
17.
Hydrophobin HFBII has been extracted from a culture of Trichoderma reesei. The protein has been used to construct air cells of approximately 1–100 μm in size, with approximately 40% of the air cells falling within the 1–2 μm range. We have termed these suspensions air-filled emulsions and propose their use for fat replacement in emulsion based food structures. The air cells in the air-filled emulsion have a surface elasticity, given by the hydrophobin film that helps prevent disproportionation and ripening. The air-filled emulsions show little if any change in individual air cell size when stored for up to 4 months at room temperature. Moreover the interface to the air cells is robust and capable of surviving long, high shear processing steps. Production of the hydrophobin film is an extremely rapid event and ordinarily it is difficult to control during emulsion formation. Here we have used a sonication process to produce the air cells. This process then allows us to control the hydrophobin assembly kinetics in order to ensure that they are not removed from the interface after aggregation, and thus rendered inactive. Using the air-filled emulsions we have created a, so called, tri-phasic system with up to 60% included phase of air and oil in an aqueous continuum and showing a greater than 50% reduction in lipid content when compared to a rheologically similar oil water emulsion. The tri-phasic emulsions are stable for up to 45 days in terms of droplet size and with no loss of air phase. 相似文献
18.
19.