天然油脂乙氧基化物稳定高内相乳液影响因素的研究

Influence factors of natural oil ethoxylates stabilized high internal phase emulsions

以棕榈仁油乙氧基化物(SOE-N-60)为表面活性剂稳定高内相乳液(HIPEs)。通过对乳液外观、微观结构、粒径分布、黏度和流变学测试,研究了油相体积分数、SOE-N-60添加量对HIPEs性能的影响,同时对其稳定性进行考察。结果表明:SOE-N-60添加量为0.6%~1.5%(油相体积分数为83%)、油相体积分数为74%~86%(SOE-N-60添加量为1.0%)时可形成稳定的HIPEs,此时乳液液滴内部形成紧密堆积的网络结构,乳液粒径变小,具有弹性凝胶性质,并展现出很好的黏弹性和触变性,且随着油相体积分数和SOE-N-60添加量的增大,乳液黏弹性逐渐增强,同时HIPEs在(-5±1)℃、(25±1)℃、(40±1)℃下贮存24 h时均具有良好的稳定性。

Using the palm kernel oil ethoxylates(SOE-N-60)as emulsifier,high internal phase emulsions(HIPEs)were prepared.The effects of the oil phase volume fraction and SDE-N-60 amount on the properties of HIPEs were discussed by detecting the emulsion appearance,microstructure,particle size distribution,viscosity and rheology,the stability of HIPEs was also studied.The results showed that the stable HIPEs could be formed when the SOE-N-60 amount was 0.6%-1.5%(oil phase volume fraction 83%)and the oil phase volume fraction was 74%-86%(SOE-N-60 amount 1.0%),and under these conditions,the compact packed network structure formed inside the emulsion droplets with smaller particle size,and the emulsion had elastic gel properties and good viscoelasticity and thixotropy.As the increase of oil phase volume fraction and SOE-N-60 amount,the viscoelasticity of the emulsion increased gradually.Meanwhile,HIPEs had good stability when stored at(-5±1)℃,(25±1)℃and(40±1)℃for 24 h.