学术
聚乙烯醇改性无纺布的制备及耐污染性能的研究
仉春华[1,2] 杨凤林[1] 王文君[3] 安晓雯[2]
[1]大连理工大学环境与生命学院,辽宁大连116024 [2]大连民族学院环境工程系,辽宁大连116600 [3]辉瑞制药有限公司,辽宁大连116600
摘 要:
采用表面涂覆法，将聚乙烯醇（PVA）薄膜固定在聚丙烯无纺布表面，进行表面亲水改性。通过测定未改性及改性无纺布表面的静态水接触角，评价改性无纺布表面的亲水性；通过测定未改性及改性无纺布牛血清蛋白（BSA）静态吸附量、在膜生物反应器中未改性及改性无纺布表面附着污泥的固定性胞外聚合物（EPSe）和溶解性胞外聚合物（EPSs）动态吸附量和组分（蛋白质／多糖，P／C）以及膜通量，评价改性无纺布的耐污染性能。结果表明，无纺布表面复合PVA薄膜，明显提高了无纺布表面的亲水性，水静态接触角从改性前的86°±1°降至改性后的43°±3°；牛血清蛋白（BSA）静态吸附量降低了83．4％；未改性与改性无纺布的EPSB吸附量相差很小，而EPSs吸附量相差很大；未改性无纺布EPSB-DEPSs的P／C均大于改性无纺布；另外，在膜生物反应器运行期间，未改性及改性无纺布的膜通量分别衰减了40％和12％。说明通过复合PVA薄膜，提高无纺布表面的亲水性，能有效抑制蛋白质的吸附和通量的降低，增加无纺布的耐污染性能。[著者文摘]
文章出处:
《高校化学工程学报》-2008年22卷1期 -172-176页
栏目信息:
文献标识码:
A
文章编号:
1003-9015（2008）01-0172-05
Preparation of PVA Modified Non Woven Fabric and Research of its Antifouling Performance
ZHANG Chun-hua, YANG Feng-lin, WANG Wen-jun, AN Xiao-wen （1.School of Environmental ＆ Biological Science ＆ Technology, Dalian University of Technology, Dalian 116024, China; 2.Environmental Engineering Department, Dalian Nationalities University, Dalian 116600, China; 3.Pfizer Pharmaceuticals Limited, Dalian 116600, China）
Abstract:
The hydrophilic modification of polypropylene non-woven fabric （NWF） surface was conducted by coating PVA （poly vinyl alcohol） film on the NWF surface via dip-coating method. Water static contact angles of original and modified NWF were measured to evaluate their hydrophilicities. The antifouling performance of modified NWF was investigated by measuring its static absorption quantity of Bovine Serum Albumin （BSA） and also by measuring the flux, dynamic absorption quantity and the component （protein/carbohydrate, P/C） of bound and soluble Extra-cellular Polymeric Substances （EPSB and EPSs） of sludge attached on the membrane when the PVA modified NWF was used as membrane in an experimental membrane bio-reactor. The results show that the hydrophilicity of NWF is improved by coating PVA film on the NWF surface, at the same time the water static contact angle is decreased from 86°±1° to 430°±3° and the static absorption quantity of BSA is decreased by 83.4%. During membrane bioreactor operation, the difference of EPSB absorption quantities between original and modified NWF is not obvious, however, the difference of EPSs absorption quantity is obvious. The P/C of EPSB and EPSs of original NWF is bigger than that of modified NWF and the flux decline of original and modified NWF is 40% and 12% respectively. It implies that PVA modification of NWF can increase its hydrophilicity, effectively restrain both its protein absorption and flux decline and improve its antifouling performance.[著者文摘]
Key words:
polypropylene non-woven fabric; poly vinyl alcohol; surface modification; antifouling
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