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POLYMERIC MATERIALS (2) answer(s).
 
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ID:   130712


Effect of surface fluorination of poly (p-phenylene terephthala / Maity, Jayanta; Jacob, Chacko; Singh, Ram Prakash   Journal Article
Maity, Jayanta Journal Article
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Publication 2014.
Summary/Abstract Direct fluorination is one of the most important and effective method to modify the polymer surface. It isa simple and fast method that allows the simultaneous treatment of outer and inner surfaces of complex shaped polymeric materials. Poly-p-phenylene terephthalamide fibers which are a very important class of material was surface modified by direct fluorination. An extensive characterization of both the virgin and the fluorinated materials were performed by various techniques (XRD, FT-IR, Surface energy and DSC, TGA). From these data, possible effects of fluorination are discussed.
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2
ID:   130711


Keratinous materials as novel absorbent systems for toxic pollu / Ghosh, Arun; Collie, Stewart R   Journal Article
Ghosh, Arun Journal Article
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Publication 2014.
Summary/Abstract A range of hazardous organic and inorganic compounds, and metal ions generated by human and industrialactivities leads to serious concerns for environments. Adsorption technologies based on polymeric materials are beingused to remove toxic substances from air and wastewater streams. Keratin protein, found abundantly in sheep's wool,human hair and bird feathers, is an interesting and potentially useful renewable biopolymer. It contains a variety offunctional groups on the backbone and side chains of the proteins, and is an ideal component to fabricate a rangeof novel adsorbent systems for separation of toxic pollutants via physisorption or chemisorption mechanisms. Inthis review article, the key activities on keratin research and development with respect to the novel properties ofkeratin proteins and their utilization as absorbents or filtration systems are summarized. It is apparent that keratinsin the form of loose fibers, non-woven fabrics, short fibers or particles, membranes and colloids can be used as absorbents for air filtration and wastewater treatment. Keratin materials have potential to be applied in biological and chemical defence applications, and also in protection against radioactive elements.
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