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Popuri, Ashok Kumar
- Casein Composites as Alternative Biodegradable Polymers
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Authors
Affiliations
1 VFSTR University, Vadlamudi, Guntur (Dist), Andhra Pradesh, IN
1 VFSTR University, Vadlamudi, Guntur (Dist), Andhra Pradesh, IN
Source
Research Journal of Pharmacy and Technology, Vol 11, No 1 (2018), Pagination: 17-22Abstract
In the past few decades, research has been shifted from monolithic materials to fibre-reinforced polymeric materials. These composite materials now dominate the aerospace, leisure, automotive, construction and sporting industries. The natural fibres are biodegradable and they don’t cause any type of environmental pollution when compared with glass fibres. Fibre reinforced composites are prepared using Ecmalon 4411 resin, cobalt octate as an accelerator, methyl ethyl ketone peroxide (MEKP) as catalyst, sisal and tadi fibres. Different samples are prepared with varying number of fibres, % of casein, soaking time, % of alkali. Form hardness and tensile strengths, sisal fibres and tadi fibres reinforced composites are having high hardness compared with simple reinforced composites. The treated fibres reinforced composites with and without casein are having high hardness compared with untreated fibre reinforced composites. With an increase in the number of fibres, hardness of the composites also increased for treated and untreated fibres reinforced composites. With an increase in amount of casein, the hardness also increased for both treated and untreated fibre reinforced composites.Keywords
Biodegradable, Casein, Composites, Sisal, Tadi.
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- Efficiency of Antiscalants in Industrial Cooling Water Systems
Abstract Views :168 |
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Authors
Affiliations
1 Department of Chemical Engineering, VFSTR, Vadlamudi, Dist.: Guntur (A.P.), IN
1 Department of Chemical Engineering, VFSTR, Vadlamudi, Dist.: Guntur (A.P.), IN
Source
Research Journal of Pharmacy and Technology, Vol 12, No 1 (2019), Pagination: 117-122Abstract
In many industrial operations formation of deposits on heat exchanger surfaces and other cooling systems is a persistent problem. These deposits contain mineral scales (CaCO3, CaSO4, Ca3 (PO4)2, CaF2 etc.), corrosion products (Fe2O3, Fe3O4, Cuo etc.), particulate matter (clay, silt etc.) and microbiological mass. Deposition of these materials on heat exchange surfaces lead to loss of system efficiency, overheating, unscheduled shutdown and ultimately failure of heat exchangers. In cooling and boiler water systems, these deposits normally accumulate in low circulation areas and may become immobilized during upset conditions resulting in buildup of deposits on heat exchangers. An effective cooling water treatment must control scale, particulate matter and corrosion. Over the years, a variety of antiscaling agents have evolved including acid/chromate, zinc/chromate, stabilized phosphonate, phosphate/zinc/polymer and all organic. Phosphonates are excellent calcium carbonate inhibitors or antiscalants which reduce the scale formation in cooling water systems. Determination of efficiency of these antiscalants is also important before using them. Techniques (Boffardi, ONGC) presently used for determining their efficiency do not provide consistent results, these methods are time consuming and also difficult to execute. Industries are facing problem in finding the optimum dosage ofantiscalant in cooling water systemswith a peculiar composition. So, a technique based on the theoretical considerations has been given herein, which produces consistent results in an easy way and requires less time to perform using cooling system water.Keywords
Antiscalant, Cooling System, TSOP, SHMP, STP, Turbidity.References
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