ABSTRACT

The effects of molecular weight ($M_w$) of polystyrene (PS) latex particles on optical and electrical percolations of multi-walled carbon nanotube (MWCNT)-added nanocomposite films were reported. Three different latex particle solutions, each having different $M_w$, were first mixed with MWCNT dispersions at various mass fractions between 0 and 20 wt.% to prepare nanocomposites, and then the drop-casting method was employed to coat glass substrates by nanocomposite films. Surface resistivity, photon transmission and scanning electron microscopy measurements were performed on prepared films. As a result, the $M_w$ of latex particles had no influence on both optical, ${\phi }_o$ and electrical percolation,${\phi }_c$ thresholds and the same threshold values were determined as 1.5 wt.%. Upon decreasing the latex $M_w$, a steady reduction from 3.99 to 2.28 was observed for the critical exponents of electrical percolation, ${\text{β}}_c$ whereas almost similar critical exponents of optical percolation (averaged ${\text{β}}_o\approx 0.20$) were found without any trend.

摘要

分子量的影响（${米}_{瓦}$) 的聚苯乙烯 (PS) 乳胶颗粒对添加多壁碳纳米管 (MWCNT) 的纳米复合膜的光学和电学渗透进行了报道。三种不同的乳胶粒子溶液，每一种都有不同的${米}_{瓦}$, 首先与 MWCNT 分散体以 0 至 20 wt.% 的各种质量分数混合以制备纳米复合材料，然后采用滴铸法通过纳米复合薄膜涂覆玻璃基板。对制备的薄膜进行表面电阻率、光子透射和扫描电子显微镜测量。结果，该${米}_{瓦}$ 乳胶颗粒对光学、 ${\phi }_{○}$ 和电渗透，${\phi }_C$阈值和相同的阈值被确定为 1.5 wt.%。在减少乳胶${米}_{瓦}$，观察到电渗流的临界指数从 3.99 稳定下降到 2.28， ${\text{β}}_C$ 而几乎相似的光学渗透临界指数（平均 ${\text{β}}_{○}\approx 0.20$) 被发现没有任何趋势。