Paper Title:
The Investigation of Conformational Change and Water Permeability of Poly(acrylic Acid)-Graft-Polypropylene Membrane in Cross-Flow Microfiltration
  Abstract

A series of poly(acrylic acid)(PAA)-graft-polypropylene membranes was prepared by UV-irradiation.The water flux of original PP membrane shows independence on pH and a linear increase with the rise of operating pressure. While the grafted membranes present great sensitivity to pH and a nonlinear relationship with operating pressure. As pH rises, grafted membranes are observed a rapid drop in flux since grafting PAA chains change from coiled to extended and then cause the decrease of pore size. It is evaluated by the change ratio of pore size that pH-sensitivity of grafted membranes increase with the rise of grafting degree till 17%. Furthermore, during Cross-flow microfiltration, the grafting chains on membrane surface tend to be bent at high operating pressure, so that membrane pores are partly blocked to cause a nonlinear rise of flux with operating pressure. In a conclusion, water permeability of grafted membranes greatly rely on the conformational change of grafting chains. These conformation alteration caused by pH or pressure may provide a new approach to control membrane filtration behaviors.

  Info
Periodical
Edited by
Zhang Yushu
Pages
397-401
DOI
10.4028/www.scientific.net/AMR.213.397
Citation
Y. J. Liu, C. Y. Lv, J. Yang, "The Investigation of Conformational Change and Water Permeability of Poly(acrylic Acid)-Graft-Polypropylene Membrane in Cross-Flow Microfiltration", Advanced Materials Research, Vol. 213, pp. 397-401, 2011
Online since
February 2011
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: Shu Xing Liu, Bei Wang
Chapter 9: Storage and Processing of Agricultural Products
Abstract:Purification extraction of ferulic acid from wheat bran by using ultrafiltration,based on the molecular weight cutoff (MWCO) of...
2294
Authors: Xi Liu, Wei Wang
Chapter 5: Applied Materials
Abstract:In this paper, calcium carbonate/polyvinylidene fluoride hybrid membrane was prepared through blending method. The effects of contents of...
594
Authors: Zhe Wang, Jing Wen Xue, Ji Shi Zhang, Wen Xia Liu
Chapter 09: Materials Science
Abstract:Ammonia sulfite pulping liquor of wheat straw was treated by ultrafiltration. Experimental results indicated that the membrane with a cut-off...
909
Authors: Rachan Klaysri, Sopita Wichaidit, Piyasan Praserthdam, Okorn Mekasuwandumrong
Chapter 1: Photocatalytic Materials
Abstract:Grafting TiO2 on PMMA was studied by atom-transfer radical-polymerization (ATRP). Each step in grafting process was monitored by...
17