交联比和乳化剂用量对大粒径交联聚合物微球溶胀性能的影响

Influence of crosslinking ratio and emulsifier dosage on swelling properties of crosslinked polymer based large microsphere

利用不同交联比和乳化剂用量制得孔喉尺度交联聚合物微球。通过透射电子显微镜(TEM)评价,当交联比为0.7%且乳化剂用量为10%时,初始粒径集中分布在175 nm附近。水化后,通过动态光散射(DLS)实验,发现所制备的交联聚合物微球的膨胀属于有限溶胀;当在交联比为0.7%且乳化剂用量为10%时,在一定时间内,微球溶胀后平均粒径最大,可达2 500nm,同时溶胀倍数也最大,约在10倍以上。

Varying crosslinking ratio and emulsifier dosage, the crosslinked polymer based pore-throat scale microspheres are prepared. The particle size of the obtained microspheres are characterized by transmission electron microscope （TEM） and dynamic light scattering （DLS）. The results show that,when the erosslinking ratio is 0.7% and emulsifier dosage is 10% ,the initial size of microspheres is mainly distributed around 175 nm, and the microspheres can achieve good swelling performance in a certain period. The size of hydrated microspheres can reach 2 500 nm, which is about 10 times of their initial diameter.