Sains Ma1aysiana 26(3&4): 109-117 (1997)                                                                             Sains Fizis dan Gunaan/

                                                                                                                                               Physical and Applied Sciences

Characterisation of Aciplex Membrane by X-ray

Photoelectron Spectroscopy

Abu Bakar Mohamad, Wan Ramli Wan Daud

Amir Kadhum, Fathi Messaud

Department of Chemical and Process Engineering

Faculty of Engineering, Universiti Kebangsaan Malaysia

43600 UKM Bangi Selangor D.E. MALAYSIA

Mohd. Ambar Yarmo

Department of Chemistry

Faculty of Physical and Applied Sciences

 43600 UKM Bangi Selangor D.E. MALAYSIA

ABSTRACT

Chemical structure of treated and untreated Aciplex membrane has been studied by X-ray Photoelectron Spectroscopy (XPS). Survey spectra showed that both membrane surfaces consist of Fluorine, Carbon, Oxygen, Sulphur and trace of Titanium. Binding energies for the elements are (C_1s at 290.6 eV, F_1s at 687.5 eV, O_1s at 531.3 eV, S_2P at 168.1 eV and Ti_2P at 454.4 eV). Analysis of narrow scan XPS-spectra of each element demonstrate the presence of (-CF, -CF₂, CF₃, C-O-C and SO^-₃) groups, which are in agreement with the structural formula as disclosed by the manufacturer. There is no significant change in chemical states of untreated and treated membrane, which reflect its stability to treatment conditions.

ABSTRAK

Struktur kimia Aciplex membran yang sudah dibersihkan dan yang belum dibersihkan telah dikaji menggunakan Spektroskopi Fotoelektron Sinaran-X (XPS). Spektra yang telah ditinjau menunjukkan bahawa kedua-dua permukaan membran mengandungi Florin, Karbon, Oksigen, Sulfur dan sedikit Titanium. Tenaga ikatan bagi unsur-unsur tersebut adalah (C_1s pada 290.6 eV, F_1s pada 687.5 eV. O_1s pada 531.3 eV, S_2P pada 168.2 eV dan Ti_2P pada 454.4 eV). Analisis imbasan kecil spektra-xps bagi setiap unsur menunjukkan kehadiran kilmpulan (-CF, - CF₂, CF₃, C-O-C dan SO^-₃) yang bertepatan dengan formula struktur dari pihak pembekal. Tiada terdapat perubahan nyata berhubung dengan keadaan kimia membran yang sudah dibersihkan dan yang belum dibersihkan yang menggambarkan kestabilannya terhadap keadaan pembersihan.

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