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微混合器以其独特的混合特性越来越受到重视,近年来人们开始将其应用于乳胶基质的制备中。利用两种微混合器分别进行乳胶基质的初乳和精乳,探讨了分离再结合型微混合器对高黏度流体的乳化原理并研究了微混合器微通道宽度,长度,以及流体流速等因素对乳化效果的影响。结果表明,不同类型的微混合器适合不同的乳化阶段。在流体总流量为40 mL·min~(-1)的条件下制备出了黏度为38000 cP,水相颗粒度平均值为1.895μm的乳胶基质。常温储存30天后硝酸铵(AN)的溶解损失率为0.2497%。分离再结合型微混合器对高黏度流体的乳化原理是流道壁对流体的剪切作用。微通道宽度显著影响乳化压力。微通道长度越长,流体流速越大,乳化质量越好。
Micromixer has drawn more and more attention due to its unique mixing characteristics. In recent years, people have begun to apply it to the preparation of latex matrix. The two kinds of micro-mixer were used to make the colostrum and the fine milk of the latex matrix respectively. The emulsifying principle of the separation-recombination micromixer on the high-viscosity fluid was discussed and the microchannel width, length and fluid flow velocity were studied The effect of emulsification. The results show that different types of micromixers are suitable for different stages of emulsification. The latex matrix with the viscosity of 38000 cP and the average particle size of water phase of 1.895 μm was prepared at a total flow rate of 40 mL · min ~ (-1). After 30 days of storage at room temperature, the dissolution loss of ammonium nitrate (AN) was 0.2497%. Separation and re-combination of micro-mixer for high-viscosity fluid emulsification principle is the flow channel wall shear effect on the fluid. Microchannel width significantly affects the emulsification pressure. The longer the microchannel length, the greater the fluid flow rate, the better the emulsion quality.