Preparation of zinc coated PMMA using solid precursor by gliding arc discharge
Preparation of zinc coated PMMA using solid precursor by gliding arc discharge
复制标题
滑动电弧放电固体前驱体制备镀锌PMMA
DOI：
10.1016/j.cej.2014.12.027
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发表时间：
2015
影响因子：
15.1
通讯作者：
Hidetoshi Sekiguchi
中科院分区：
文献类型：
--
作者：
Warit Ua-amnueychai;Satoshi Kodama;Wiwut Tanthapanichakoon;Hidetoshi Sekiguchi
采用一种新型的以锌粒子为固体前驱体的滑动弧光放电方法对聚甲基丙烯酸甲酯(PMMA)粒子进行包覆，以获得可调的导电性。在电极上施加4.5kV的交流电压，注入2毫升L和1毫升−的气体，产生滑动弧光放电。通过采用喷动床条件和滑动弧光放电相结合的方法，实现了涂层的快速性能。包覆5min后，PMMA颗粒被一层细小的锌层覆盖。涂覆量在工艺开始时增加，20分钟后变得相对稳定。在床中锌/PMMA质量比为0.10，涂覆时间为10分钟时，涂锌量约为10 mg/1 g PMMA颗粒。计算出锌的表面覆盖率为60%，厚度为140 nm。当锌/聚甲基丙烯酸甲酯质量比为0.15时，涂层样品的电导率约为3.7T×10−1s/m−1，厚度为195 nm，表面覆盖率为75%。涂锌量与涂覆时间和床层中锌/PMMA的质量比成正比。镀锌量的增加导致镀锌层厚度的增加，从而进一步提高了镀锌层聚合物的电导率。该方法在颗粒包衣工艺中具有广阔的应用前景。
A novel gliding arc discharge method using zinc particle as a solid precursor was used to coat poly methyl methacrylate (PMMA) particles to provide an adjustable electrical conductivity. An AC voltage of 4.5 kV was applied to the electrodes and 2 L min−1of argon gas was injected to generate the gliding arc discharge. By using a combination of spouted bed condition and gliding arc discharge, a rapid coating performance was achieved. After 5 min of coating process, PMMA particles were observed to be covered by a fine zinc layer. The amount of coating increased at the beginning of the process and became relatively constant after 20 min. The amount of zinc coating was found to be approximately 10 mg/1 g of PMMA particle at a coating time of 10 min and 0.10 zinc/PMMA mass ratio in the bed. The percentage of zinc surface coverage was calculated to be 60% with a thickness of 140 nm. The coated samples exhibited electrical conductivity, approximately 3.7 × 10−1S m−1at zinc/PMMA mass ratio of 0.15 with a thickness of 195 nm and a surface coverage of 75%. The amount of zinc coating showed a proportional relationship with both coating duration and zinc/PMMA mass ratio in the bed. The increase in the amount of zinc coating resulted in an increase of coating thickness, which further resulted in an increasing electrical conductivity of the coated polymer. The proposed method shows a promising potential for particle coating process.