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H 3 PO 4 -activated poly(vinyl alcohol) coated fiberglass mats (PAPCF) were prepared in air at temperatures below 400 °C. The surface chemistry and pore structure of PAPCF were characterized by using N 2 adsorption at 77 K, XPS, DRIFTS, TGA, NaOH uptake and Ag + adsorption. PAPCF prepared at 300 °C yields a high BET surface area (up to 1745 m 2 /g of coating)...
Fibrous porous materials (FPMs) have been prepared by coating a glass fiber with an aqueous solution of poly(vinyl alcohol) (PVA) and H 3 PO 4 , followed by stabilization and heat treatment in air. The H 3 PO 4 was then removed by washing with deionised water and NaOH. The results show that H 3 PO 4 acts as a dehydration agent to promote pyrolytic and...
The work described here entails the synthesis and characterization of polyvinyl alcohol mercaptyl fibers, coated on a fiberglass substrate, for the purpose of removing arsenite (As 3+ ) from water. Because thiols are chemically the most active functional groups found in cells and are capable of forming very stable complexes with metal ions, this functional group was selected as an excellent...
Fibrous porous materials (FPMs) have been prepared by coating a glass fiber with a solution of polymer and ZnCl 2 , followed by stabilization in air and heat treatment in N 2 . The ZnCl 2 was then removed by washing with D.I. water and HCl. Four kinds of polymers, a phenolic resin, polyacrylonitrile, poly(vinyl alcohol) and cellulose, were used to prepare solutions with ZnCl...
This research demonstrates that pyropolymeric fibers derived from phenol-formaldehyde resins can be successfully sulfonated providing advantages that are not currently available with traditional polymeric ion-exchangers. Benefits of this system include higher thermal stability, elimination of osmotic shock associated with beads, and enhanced ion-exchange capability. In this study, a series of thermally...
A series of activated carbon fibers (ACFs) were produced by treatment with ammonia to yield a basic surface. The micropore sizes of these chemically modified fibers were determined with nitrogen adsorption experiments and they were shown to increase with increasing activation time and temperature. The types of groups present were analyzed by Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron...
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