کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1524962 995345 2011 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Structural, chemical surface and transport modifications of regenerated cellulose dense membranes due to low-dose γ-radiation
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد مواد الکترونیکی، نوری و مغناطیسی
پیش نمایش صفحه اول مقاله
Structural, chemical surface and transport modifications of regenerated cellulose dense membranes due to low-dose γ-radiation
چکیده انگلیسی

Modifications caused in commercial dense regenerated cellulose (RC) flat membranes by low-dose γ-irradiation (average photons energy of 1.23 MeV) are studied. Slight structural, chemical and morphological surface changes due to irradiation in three films with different RC content were determined by ATR-FTIR, XRD, XPS and AFM. Also, the alteration of their mechanical elasticity has been studied. Modification of membrane performance was determined from solute diffusion coefficient and effective membrane fixed charge concentration obtained from NaCl diffusion measurements. Induced structural changes defining new and effective fracture propagation directions are considered to be responsible for the increase of fragility of irradiated RC membranes. The same structural changes are proposed to explain the reduction of the membrane ion permeability through a mechanism involving either ion pathways elongation and/or blocking.

Research highlights▶ Low dose γ-radiation causes slight structural, chemical and morphological changes on regenerated cellulose films. ▶ Induced structural changes increase the fragility of irradiated films. ▶ Structural modifications reduce ion permeability of films.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Chemistry and Physics - Volume 126, Issue 3, 15 April 2011, Pages 734–740
نویسندگان
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