Mechanical properties of a reversible, DNA-crosslinked
Mechanical properties of a polyacrylamide gel with reversible DNA crosslinks are presented. In this system, three DNA strands replace traditional chemical crosslinkers. In contrast to thermoset chemically crosslinked polyacrylamide, the new hydrogel is thermoreversible; crosslink dissociation without the addition of heat is also feasible by introducing a specific removal DNA strand.
Cross-linked polyacrylamide was recovered from soil by washing on a 2-mm sieve with distilled water. The resulting cross-linked polyacrylamide gel retained on the sieve was then removed and oven dried for 3 days at 60 °C to determine its dry weight.
Preparation of DNA-crosslinked Polyacrylamide Hydrogels
L2, the crosslinker, is added to the SA1 and SA2 mixture. The L2 base sequence is complementary to both SA1 and SA2 sequences and L2 hybridizes with SA1 plus SA2 to form the DNA crosslinks. Initial, DNA gel elasticity is determined by both L2 concentrations and crosslinking (Tables 1 and2).
Get Price
Study on Properties of Crosslinked Polyacrylamide
LEAD OILFIELD SOLUTIONS COMPANY is a professional manufacturer and supplier of Drilling fluid loss additives, Corrosion inhibitor and Demulsifier in Qingdao, China.We produce such as clay stabilizer,shale inhibitor,friction reducer etc.. - Study on Properties of Crosslinked Polyacrylamide Microspheres and Its Sealing Properties
Get Price
Model and field studies of the degradation of cross-linked
This study assessed the chemical, physical and biological properties of new and field-conditioned cross-linked polyacrylamide gels.
Get Price
Study of cryostructurization of polymer systems—X. 1H-
Some features of the formation of polyacrylamide cryogels have been studied by means of 1 H- and 2 H-NMR. These gels were prepared by free radical copolymerization of acrylamide and N,N′-methylene-bis-acrylamide in a frozen aqueous medium.Using the spectral changes during polymerization, the cryotropic gelation may be conventionally subdivided into three stages during which the narrow NMR
Get Price
Laboratory scale study on rheological behavior
In this study, polyacrylamide (PAM) and p... Laboratory scale study on rheological behavior, morphological and structural properties of crosslinked polyacrylamide composite hydrogels embedded with date seed powder - Adewunmi - 2015 - Journal of Applied Polymer Science - Wiley Online Library
Get Price
An international multi-centre prospective study
Polyacrylamide hydrogel a (PAAG) is a non-toxic and non-immunogenic biocompatible polymer gel consisting of 97.5% sterile water and 2.5% cross-linked polyacrylamide [10,11]. Its biocompatibility in soft tissues (e.g. reconstructive surgery, urology) has been demonstrated [12-14].
Get Price
An experimental investigation of polyacrylamide
(2024). An experimental investigation of polyacrylamide and sulfonated polyacrylamides based gels crosslinked with cr(III)-acetate for water shutoff in fractured oil reservoirs. Journal of Dispersion Science and Technology: Vol. 39, No. 12, pp. 1780-1789.
Get Price
Polyacrylamide | chemical compound | Britannica
Polyacrylamide, an acrylic resin that has the unique property of being soluble in water. It is employed in the treatment of industrial and municipal wastewater. Polyacrylamides are produced by the polymerization of acrylamide (C3H5NO), a compound obtained by the hydration of acrylonitrile.
Get Price
Some Properties of Polyacrylamide Gels | Nature Physical
GELS composed of cross-linked Polyacrylamide have been used extensively in gel permeation chromatography and as a stabilizing medium in the zone electrophoresis of proteins and nucleic acids. Both
Get Price
Controlled Aloin Release from Crosslinked Polyacrylamide
The aim of this paper is to investigate the effects of hydrogel mesh size, a conductive polymer, and electric field strength on controlled drug delivery phenomena using drug-loaded polyacrylamide hydrogels prepared at various crosslinking ratios both with and without a conductive polymer system. Poly(p-phenylene vinylene), PPV, as the model conductive polymer, was used to study its ability to
Get Price
Strengthening Alginate/Polyacrylamide Hydrogels Using
We successfully synthesized a family of alginate/polyacrylamide hydrogels using various multivalent cations. These hydrogels exhibit exceptional mechanical properties. In particular, we discovered that the hydrogels cross-linked by trivalent cations are much stronger than those cross-linked by divalent cations. We demonstrate stretchability and toughness of the hydrogels by inflating a
Get Price
Rheological behaviors and secondary networks
Polyacrylamide (PAM) hydrogel filled with different types and contents of hydrophilic silica was synthesized by in situ polymerization. Rheological behaviors of the hydrogels were measured with an oscillation rheometer. The results indicated that the addition of silica efficiently improved the mechanical properties of the hydrogel, both for the uncrosslinked system and crosslinked system
Get Price
Synthesis and characterization of a novel polymeric
A novel hydrogel has synthesized by grafting polyacrylamide chains onto hydroxypropyl methylcellulose in presence of potassium persulphate as initiator using solution polymerization technique. The reaction was carried out in homogeneous aqueous medium. The effect of reaction parameters on percentage of grafting (% G) and grafting efficiency (% GE) were discussed.
Get Price
An experimental investigation of polyacrylamide
(2024). An experimental investigation of polyacrylamide and sulfonated polyacrylamides based gels crosslinked with cr(III)-acetate for water shutoff in fractured oil reservoirs. Journal of Dispersion Science and Technology: Vol. 39, No. 12, pp. 1780-1789.
Get Price
Two-year follow-up of an open-label multicenter study
The first description of the use of polyacrylamide hydrogel (PAHG) for urethral bulking was in 2006 . Bulkamid® is a polymer gel consisting of 2.5 % cross-linked polyacrylamide and 97.5 % water for injection. It is atoxic [15, 16] and resistant to degradation [17, 18]. PAHG has been used in aesthetic plastic and reconstructive surgery in
Get Price
Polyacrylamide | chemical compound | Britannica
Polyacrylamide, an acrylic resin that has the unique property of being soluble in water. It is employed in the treatment of industrial and municipal wastewater. Polyacrylamides are produced by the polymerization of acrylamide (C3H5NO), a compound obtained by the hydration of acrylonitrile.
Get Pricec Copyright CSIRO Notice Please note that this document
5 this study. It is a white granular powder with 90% active ingredient, 75-1000 µm particle size, 0.60 g/cm 3 bulk density and it swells to form a gel in water. The synthesis of cross-linked polyacrylamides has been described by Bouranis (1997).
Get Price
Crosslinked Polymeric Gels as Loss Circulation Materials
Crosslinked Polymeric Gels as Loss Circulation Materials: An Experimental Study Authors M. D. Hashmat (King In this work interaction of a commercial grade hydrolyzed polyacrylamide (HPAM) and a HPAM derivative with polyethleneimine (PEI) was studied, for the possible use of these polymeric systems as a loss preventive and sealing agent
Get PriceFracture of the Physically Cross-Linked First Network
Fundamental understanding of the fracture process and toughening mechanisms of double network (DN) hydrogels is critical for rational design of the next generation of tough DN gels with desirable mechanical properties. However, current knowledge of DN gels from synthesis methods to toughening mechanisms mainly comes from chemically cross-linked DN gels.
Get Price
Polyacrylamide | Article about polyacrylamide by The Free
An Optimization Study of Polyacrylamide-Polyethylenimine-Based Polymer Gel for High Temperature Reservoir Conformance Control. Zimmerman, "Rheology and permeability of cross-linked polyacrylamide gel," Journal of Colloid and Interface Science, Interactive effects of clay and polyacrylamide properties on flocculation of pure and subsoil clays.
Get Price
c Copyright CSIRO Notice Please note that this document
5 this study. It is a white granular powder with 90% active ingredient, 75-1000 µm particle size, 0.60 g/cm 3 bulk density and it swells to form a gel in water. The synthesis of cross-linked polyacrylamides has been described by Bouranis (1997).
Get Price
Casein Cross-linked Polyacrylamide Hydrogels: Study
The polymeric hydrogels composed of polyacrylamide and food protein casein have been synthesized for the purpose of studying their swelling and drug release behaviour. The two samples, differing in cross-linking ratio, show almost Fickian swelling behaviour (n50.50) except the less cross-linked sample at pH 7.0 for which swelling exponent n was
Get Price
Composite hydrogels of polyacrylamide and crosslinked pH
Composite hydrogels of polyacrylamide and crosslinked pH-responsive micrometer-sized hollow particles. Kyriaki Pafiti Biomaterials Research Group, School of Materials, The University of Manchester, MSS Tower, Manchester, M13 9PL, UK.
Get Price
Tough, resilient and pH-sensitive interpenetrating
readily crosslinked via ionic bonding by divalent or multivalent cations such as calcium cations (Ca 2+) (George & Abraham, 2006), and become long-term insoluble and stable in water (Rhim, 2004).Ca 2+-crosslinked alginate has recently been shown to toughen chemically crosslinked polyacrylamide (PAM) hydrogels because of its
Get Price
Study on Properties of Branched Hydrophobically Modified
Study on Properties of Branched Hydrophobically Modified Polyacrylamide for Polymer Flooding By Lei-Ting Shi, Cheng Li, Shan-Shan Zhu, Jie Xu, Bao-Zong Sun and Zhong-Bin Ye No static citation data No static citation data Cite
Get Price
An NMR relaxometry and gravimetric study of gelatin-free
An NMR relaxometry and gravimetric study of gelatin-free aqueous polyacrylamide dosimeters To cite this article: Steven Babic and L John Schreiner 2006 Phys. Med. Biol. 51 4171 View the article online for updates and enhancements. Related content A gelatin-free model system for the study of the basic radiation-induced polymerization in PAG
Get Price- Does fengbai supply Pac chemicals?
- Now Fengbai can supply PAC chemicals 70,000 tons every year (include drinking water grade PAC 40,000 tons, industrial water grade PAC 30,000 tons). Besides, Fengbai also provides Trichloroisocyanuric Acid (TCCA) 15,000 tons and Sodium Dichloroisocyanurate (SDIC) 18,000 tons every year. The following are the reasons why you choose Fengbai:
- Who is Henan fengbai?
- As a professional manufacturer and exporter in China, Henan Fengbai Industrial Co., Ltd. has been focusing on rearching and producing various types of water treatment chemicals for more than 15 years. Now Fengbai can supply PAC chemicals 70,000 tons every year (include drinking water grade PAC 40,000 tons, industrial water grade PAC 30,000 tons).
- How many types of chemical products does fengbai have?
- After the years of development, Fengbai company has expanded the chemical business to six series products in more than 50 varieties, spanning over water purifying materials, food and feed additives, paint and coating, detergent, texile and leather auxiliaries, and some other basic chemicals.
- Who is fengbai?
- As a professional manufacturer & supplier of water treatment chemicals, Fengbai can offer good products and services for all the customers. Inquiry now.
