图为乙基纤维素/乙酸乙酯质量比分别为0.4/10、0.8/10以及1.2/10时,所得乙基纤维素微球的粒径分布曲线。从图中可知,随着乙基纤维素/乙酸乙酯质量比由0.4/10升至1.2/10,所得粉体粒径逐渐增大,其平均粒径分别为2.6、15.7、23.1μm。
The figure shows the particle size distribution curves of the ethylcellulose microspheres obtained when the mass ratio of ethyl cellulose to ethyl acetate was 0.4/10, 0.8/10 and 1.2/10, respectively. As can be seen from the figure, as the mass ratio of ethyl cellulose/ethyl acetate increased from 0.4/10 to 1.2/10, the particle size of the obtained powder gradually increased, and the average particle size was 2.6, 15.7 and 23.1μm, respectively.