摘要：
To enhance the filter efficiency for fine particles, a natural mineral electret Tourmaline with adsorbability were used to make a new electret filter material through solution deposition and thermocompression bonding. The results indicated that the pressure drop across the surfactant-pretreated filters (SPFs) was nearly the same as the untreated filter. The efficiency of fine particles to SPFs was obviously higher than untreated filter, and the efficiency increases as aerosol size decreases. Different to traditional electret filter, no change was discovered to the efficiency of new electret filter for fine particles after 200°C high temperature treated. The absorbability was more obvious with the higher purity of tourmaline, the efficiency increasing for 0.3, 0.5, 0.7, 0.9, 1, 2.5μm particles were 18.52％, 18.01％, 16.84％, 15.76％, 13.35％, 11.49％ respectively by the tourmaline purity of 87.52％, the tourmaline purity of 80.61％ were 11.57％, 11.20％, 9.94％, 9.75％, 8.47％, 9.76％ and the tourmaline purity of 78.87％ were 9.24％, 9.26％, 7.75％, 7.77％, 6.06％, 5.90％. The efficiency increasing of tourmaline with 25μm average particle size for 3μm particles was less than 2％.%为强化滤料对微细颗粒物的捕集效率,采用一种具有吸附作用的天然矿物驻极体电气石,通过溶液沉淀及热压工艺将电气石颗粒附着于过滤材料表面,形成一种新型改性驻极滤料,实验结果表明:驻极处理后的滤料压差与未处理滤料基本一致,对微细粒子的捕集效率提升显著,捕集效率的提升幅度随着颗粒物粒径减小而增大.与传统驻极体滤料不同,新型驻极滤料经200°C高温处理后对微细颗粒物捕集效率没有变化.电气石纯度越高吸附作用越明显,纯度为87.52％电气石对0.3,0.5,0.7,0.9,1,2.5μm颗粒的捕集效率分别提升了18.52％,18.01％,16.84％,15.76％,13.35％,11.49％;纯度为80.61％电气石对各粒径颗粒捕集效率分别提升了11.57％,11.20％,9.94％,9.75％,8.47％,9.76％;纯度为78.87％电气石对各粒径颗粒捕集效率分别提升了9.24％,9.26％,7.75％,7.77％,6.06％,5.90％;平均粒径为25μm的电气石颗粒对3μm颗粒物捕集效率的提升<2％.
