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![Development and Analysis of a Thin Film Nanocomposite Membrane: Resistance to Chlorine için kapak resmi Development and Analysis of a Thin Film Nanocomposite Membrane: Resistance to Chlorine için kapak resmi](/client/assets/d79c3e4af2b6d196/ctx/images/no_image.png)
Development and Analysis of a Thin Film Nanocomposite Membrane: Resistance to Chlorine
Başlık:
Development and Analysis of a Thin Film Nanocomposite Membrane: Resistance to Chlorine
Yazar:
Altalhi, Abdulmajeed, author.
ISBN:
9780355940558
Yazar Ek Girişi:
Fiziksel Tanımlama:
1 electronic resource (78 pages)
Genel Not:
Source: Masters Abstracts International, Volume: 57-06M(E).
Advisors: Holly A. Stretz Committee members: Laura Arias Chavez; David Crouse.
Özet:
The degradation of polyamide (PA) reverse osmosis media by chlorine decreases the selectivity of an expensive membrane which can be used with disinfection in the purification of produced water. However, understanding the degradation of a membrane requires quantitative analysis of a ∼0.2 mum thin film grafted to a polysulfone support. A novel approach was introduced using thermal gravimetric analysis (TGA) to help detect chemical changes caused by chlorine attack for a model system, bulk-synthesized polymer of 1,3-phenylenediamine and 1,3,5-benzenetricarbonyl trichloride. Addition of montmorillonite (MMT) with sodium counterion appeared to offer some protection from N-chlorination of the polyamide for up to 50 hours at 1000 ppm hypochlorite solution. Nonisothermal degradation models aided determination of kinetic parameters, and effects of chlorination and MMT addition on char yield and temperature for onset of degradation are also reported. The char yield and the activation energy values correlated well with N-chlorination events. Addition of up to 20% MMT showed some evidence of protection of the membrane material from N-chlorination. A model based on free-radical trapping is discussed.
Notlar:
School code: 0390
Konu Başlığı:
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Yer Numarası | Demirbaş Numarası | Shelf Location | Lokasyon / Statüsü / İade Tarihi |
---|---|---|---|
XX(688350.1) | 688350-1001 | Proquest E-Tez Koleksiyonu | Arıyor... |
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