聚合物乳液粒子制备纳米多孔增透膜

Nanoporous Antireflection Coatings via Polymer Latex

采用提拉法在载玻片上沉积了PMMA/PS混合乳液粒子,用环己烷选择性地溶解掉表层PS粒子,制备了孔隙率从表向里梯度变化的纳米粒子增透膜,在578 nm处透过率可达99.5%;研究了两种聚合物纳米粒子的比例及环己烷浸泡时间对增透性能的影响。本方法可用于大面积和不规则基材上制备增透膜,并解决了提拉法成膜的粒子堆积紧密、孔隙率低且不易调节的缺点,使粒子膜的透过率大幅度提高。

By inducing nano-pores into single-layer antireflection （AR） coatings, the effective refractive indices of the films can be greatly reduced, thus improve the AR performance. A new way to fabricate nanoporous AR structures on glass plate by dip-coating from mixed PMMA and PS latex, followed by selective dissolution of PS particles with cyclohexane. The resulted nanopartice coatings remarkably increase the transmission through the glass plate, with maximum transmittance 99.5% at 578 nm. The influences of dip-coating mixture of PMMA and PS particles and the exposal time to cyclohexane on transmittance were studied. Besides versatile and tunable for fabricating nanoporous films, this method is allowable for preparing AR coatings on large area and irregular substrates.