本文關(guān)鍵詞：呼吸圖案法制備CTA蜂窩狀微孔膜的研究　出處：《華東理工大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 三醋酸纖維素 呼吸圖案法 蜂窩狀微孔膜 CTA/無紡布多孔膜 PM2.5

【摘要】：多孔材料在許多行業(yè)有著廣泛的應(yīng)用,越來越多的聚合物能成功的制備出均勻的孔結(jié)構(gòu)。三醋酸纖維素具有優(yōu)良的機(jī)械性能,本文選用三醋酸纖維素為膜材質(zhì),以二氯甲烷為溶劑,采用靜態(tài)呼吸圖法制備了有序的蜂窩狀微孔膜�？疾炝巳軇舛�、溫度、濕度等條件對蜂窩狀微孔膜微觀結(jié)構(gòu)和孔徑大小的影響。實(shí)驗(yàn)表明,濃度在0.5wt%-2.0wt%范圍內(nèi),溫度在15℃-35℃范圍內(nèi),濕度在70-90RH%范圍內(nèi),以載玻片為基板可以制得孔徑約3μm的蜂窩狀微孔膜�？讖诫S著濃度的增加,溫度的增加而減小,高濕度的環(huán)境下可以制得大孔徑的微孔膜,靜態(tài)法減少了空氣的擾動(dòng)作用,有利于提高膜的規(guī)整度。通過在鑄膜液中浸泡無紡布,來制備大面積的蜂窩狀微孔膜,改變濃度以及無紡布放置方式來考察膜表面孔徑大小分布�？諝庵蠵M2.5的含量對人體的健康構(gòu)成了一定的威脅,對空氣中小顆粒的凈化刻不容緩,CTA/無紡布多孔膜的孔徑在1-4μm,而空氣中PM2.5的直徑在這個(gè)范圍內(nèi),可以用CTA/無紡布多孔膜來截留空氣中PM2.5。改變了三個(gè)變量即不同濃度下形成的膜,空氣流速,空氣中PM2.5的含量,考察對空氣截留率的影響。結(jié)果表明CTA/無紡布多孔膜對空氣中PM2.5具有一定的截留作用。
[Abstract]:Porous materials have been widely used in many industries, the successful preparation of homogeneous pore structure more and more. Three cellulose acetate polymer with excellent mechanical properties, this paper selects three cellulose acetate membrane with dichloromethane as the solvent and honeycomb porous films were prepared using ordered static breath figure method was investigated. Solvent, concentration, temperature, humidity and other conditions on the influence of microstructure and pore size of honeycomb porous films. Experimental results show that the concentration in the range of 0.5wt%-2.0wt%, the temperature at 15 DEG -35 DEG range, the humidity in the range of 70-90RH%, honeycomb microporous membrane substrate can be prepared aperture of about 3 mu m to slide. The aperture with the increase of concentration, the temperature decreases with the increase of the high humidity can be prepared microporous membrane with large pore diameter, static method can reduce the disturbance of air, improve the regularity of the film through. The casting solution for non-woven fabrics, to honeycomb microporous membrane preparation of large area, changing the concentration and placed to examine the non-woven membrane surface pore size distribution. The PM2.5 contents in air on the human body is a threat to small particles, air purification urgent, CTA/ non-woven porous membrane aperture in 1-4 m, and PM2.5 in the air of diameter in this range can be used to intercept CTA/ non-woven porous membrane PM2.5. in the air changed form the three variables under different concentrations of membrane, air velocity, air content in PM2.5, the effect on the air interception rate. The results show that the CTA/ film has a porous nonwoven fabric retention of PM2.5 in the air.

【學(xué)位授予單位】：華東理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TB383.2

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