Synthesis and application of amphoteric starch graft
Amphoteric starch-graft-polyacrylamide was prepared by free radical grafting of carboxymethyl starch [8], by emulsion polymerization in the presence of starch with subsequent hydrolysis and
Contaminants in real water are normally complicated. Surface charges of suspended colloidal particles can be either negative or positive. In this work, a series of amphoteric starch-based grafting flocculants (3-chloro-2-hydroxypropyl trimethyl ammonium chloride modified starch-graft-poly(acrylamide-co-acrylic acid)) denoted as SCPAMPAA were successfully synthesized with different grafting
Synthesis and application of amphoteric starch graft
2.2. Preparation of amphoteric starch-graft-polyacrylamide. The reaction was carried out in a four-necked round-bottom flask with stirrer, thermometer, nitrogen gas inlet and condenser. About 70 mL of liquid paraffin and emulsifier (mixture of Span-20 and op-10) were added.
An anionic polyacrylamide-grafted starch (St-g-APAM) flocculant for the coal slurry waste water, was prepared by using corn starch and acrylamide (AM) as monomers, acrylic acid (AA) as anionic monomer through solution polymerization. The effects of initiator concentration, reaction temperature, and monomer concentration on percentage of grafting and the grafting efficiency were investigated.
Polyacrylamide-grafted legume starch for wastewater
Polyacrylamide-grafted legume starch for wastewater treatment: synthesis and performance comparison Article (PDF Available) in Polymer Bulletin · February 2017 with 128 Reads How we measure 'reads'
Eutamene et al. (2009) also studied starch-grafted polyacrylamide copolymers and evaluated their rheological properties, either in water or in water-based muds. Several grafted starches were
Cationic starch-grafted-cationic polyacrylamide based
Cationic starch-grafted-cationic polyacrylamide based graphene oxide ternary composite flocculant for the enhanced flocculation of oil sludge suspension. Q. Feng, Lf GuoCharacterization of cationic polyacrylamide-grafted starch flocculant synthesized by one-step reaction. J Appl Polym Sci, 123 (2) (2012), pp. 1261-1266.
Bridging by polyacrylamide molecules, the sorption and movement to fibre contact areas by molecules and macromolecular fragments from cationic starch are discussed. Evidence is presented for the agglomerated state of pigments in paper and electron micrographs establish that titanium dioxide can be retained at about 0.25 u. Modern criteria for
The Use of Polymers in the Flotation Treatment of - MDPI
The use of flotation for the treatment of wastewaters in general, but especially for the removal of oil, grease, general organic matter, and suspended solids, is well established as a low energy process. Polyelectrolytes (PEs) can enhance performance without adding to the solids load that occurs with inorganic additives such as alum. The bridging of pollutants and the attachment of the
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New Publications: Starch/Stärke 3‐4/2007, Starch / Staerke
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This is the online version of the Philippine Journal of Science (PJS), a journal on natural sciences, engineering, mathematics and social sciences under ISI coverage, published by the Department of Science and Technology and managed by Science and Technology Information Institute of the Department of Science and Technology. The first issue of PJS was in 1906.
- What is partially hydrolyzed polyacrylamide (PHPA)?
- Partially hydrolyzed polyacrylamide (PHPA) is a widely used polymer in the oil and gas industry due to its lesser cost and good water solubility. PHPA is used as a functional additive in water-based drilling fluids. The PHPA mud system stabilizes shale formations and influences cuttings and wellbore stability.
- What is PHPA used for in oil & gas industry?
- Fig. 1. Chemical structure of PHPA In the oil and gas industry, PHPAs have a long history of use as bentonite additives to inhibit the swelling of water-sensitive shales and to reduce fluid loss in permeable formations (Liao and Siems 1990; Kadaster et al. 1992; Kelessidis et al. 2013).
- Is PHPA a water soluble polymer?
- Description: PHPA is a co-polymer of anionic character and high molecular weight. It is a water-soluble polymer, which is primarily used as a highly efficient fluid loss reducer, Viscosifier and protective colloid for shale’s and cutting in fresh water, calcium, sodium brines and KCL mud systems.
- What is the technology of PHPA mud systems?
- Although more is known from field applications about how practices, although more is known from field applications about how the products work and the systems behave, the technology of PHPA mud systems is still developing. Drilling of oil and gas wells always results in the incorporation of native clays into the mud system.
