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    2013-6-1 · For the three different types of charged hydrogel, the neutral hydrogel achieved the narrowest distribution. For each type of hydrogel of the same charge, the maximum size was obtained at pH = 13. Due to the large size of the hydrogels, they can be easily precipitated in water and surplus chemicals like unreacted monomers can be readily removed.

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    2012-3-17 · Preparation and characterization of some interpenetrating polymer networks (IPN) composite hydrogels based on polyacrylamide (PAAm) and chitosan (CS) are presented in the paper. The reaction variables selected for the preparation of semi-IPN (s-IPN) hydrogels are the ratio of cross-linker (X), pH of the reaction mixture, and CS molar mass. The fraction of CS trapped in the s-IPN hydrogels, …

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    2020-11-1 · The aim of this study is the synthesis of composite using polyacrylamide-chitosan (PAM–CS) hydrogel matrix containing dispersed TiO 2 nanoparticles as a new adsorbent for the removal of Sirius yellow K-CF from aqueous solution. The effects of various parameters such as pH, adsorbent dosage, contact time and temperature were investigated during batch adsorption process.

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    2018-12-11 · Abstract. The ionic polyacrylamide/graphene oxide (PAM/GO) hydrogel as an excellent methylene blue (MB) adsorbent was prepared by an improved one-step radical polymerization method using graphene oxide, acrylamide, and polar second monomers. The hydrogel was characterized by Fourier transform infrared spectroscopy, Raman spectra, X-ray diffraction, ...

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    2017-11-16 · graft polymer nanocomposite hydrogel system may be prepared at low polymer and crosslinker concentrations and have higher gel strength and required longer gelation time than the conventional gel systems. In this research, a novel polyacrylamide graft starch/clay nanocomposite hydrogel was prepared and characterized by FTIR, XRD, TEM, TGA and FESEM.

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    Al2S3 Description : Sulfides. Inorganic sulfides are ionic compounds containing the sulfide ion S2−. Sulfide compounds can be used in a wide variety of applications including solid-state electrolytes, cathode materials in lithium-ion and thermal batteries, semi-conductors in thermoelectric devices, as part of phosphor compositions, as photovoltaic materials, as pigments, and a variety of ...

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    2013-6-1 · Cationic, neutral, and anionic polyacrylamide hydrogel beads were prepared using an inverse emulsion polymerization .The aqueous phase (∼9 mL total) contained water, acrylamide, bis-acrylamide, allylamine (only for cationic hydrogels) and AMPS (only for anionic) hydrogels, and APS.The organic phase consisted of 9 mL cyclohexane with dissolution of 900 μL of Span 80 as surfactant to ...

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    Liposome Crosslinked Polyacrylamide/DNA Hydrogel: a. Liposome Crosslinked Polyacrylamide/DNA Hydrogel: a Smart Controlled‐Release System for Small Molecular Payloads Small ( IF 10.856) Pub Date : 2018-02-26 Danya Lyu, Shanshan Chen, Weiwei Guo A novel stimuli‐responsive hydrogel system with liposomes serving as both noncovalent crosslinkers and functional small molecules carriers for ...

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    2012-3-17 · Preparation and characterization of some interpenetrating polymer networks (IPN) composite hydrogels based on polyacrylamide (PAAm) and chitosan (CS) are presented in the paper. The reaction variables selected for the preparation of semi-IPN (s-IPN) hydrogels are the ratio of cross-linker ( X ), pH of the reaction mixture, and CS molar mass.

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    2020-11-20 · Sodium alginate (SA), chitosan, cellulose and lignin (Zhou et al., 2014), which are natural polysaccharide, generally are at a low price and easily accessible (Lin et al., 2020). Due to sodium alginate's good biocompatibility and biodegradability, sodium alginate is chosen as an excellent kind of bio-adsorbent substrate.

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    2018-12-11 · The ionic polyacrylamide/graphene oxide (PAM/GO) hydrogel as an excellent methylene blue (MB) adsorbent was prepared by an improved one-step radical polymerization method using graphene oxide, acrylamide, and polar second monomers. The hydrogel was characterized by Fourier transform infrared spectroscopy, Raman spectra, X-ray diffraction, scanning electron microscopy, and …

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    2018-10-1 · Fig. 1 shows the preparation progress of PAM/bentonite/g-C 3 N 4 3D-hydrogel. In this step, MBA and the mixture of NaHSO 3 and K 2 S 2 O 8 were used as crosslinking agent and evocating agent. 150 mL of hyperpure water, 2 g of bentonite, 20 g of AM, 40 mg of MBA and a certain amount of g-C 3 N 4 nanosheet were added into a 250 mL beaker. The mixture was strongly stirred for 6 h.

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    The problems analysis of anionic polyacrylamide - Vidar Water. Anionic polyacrylamide has no potential to bioaccumulate, being completely soluble in water (solubility is only limited by viscosity) and insoluble in octanol. Additionally, being a flocculant, it adsorbs onto suspended matter and, in this way, is removed from the water phase. Get Price

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    2012-11-15 · Highlights Hollow ZSM-5 crystals could be synthesized by using polyacrylamide as template. Hollow ZSM-5 with voids formed under low temperature or high PAM concentration. Egg-shell like hollow ZSM-5 formed with less amount of PAM at high temperature. The walls of hollow ZSM-5 crystals possessed microporous crystalline framework.

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    Polyacrylamide nonionic water-soluble polymer Sigma. Polyacrylamide is used in the preparation of acrylamide gels for separation of proteins. Packaging 10, 50 g in glass bottle Biochem/physiol Actions Polyacrylamide is a water-soluble polymer made up of acrylamide subunits.

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    Oct 01, 2018· Zhu and co-workers reported 3D graphene-hydrogels and the application in water treatment (Chen et al., 2017; Polyacrylamide (PAM) is a kind of water purifying flocculant agent, Because of its wide range of source materials, low price and excellent adsorption performance, bentonite has become one of the most widely used adsorbents.

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  • Preparation and Hygroscopic Property of the

    Polyacrylamide/MgCl2 hybrid hydrogel desiccant was prepared from magnesium chloride and polyacrylamide by aqueous solution polymerization. The hybrid hydrogel was synthesized and characterized by X-ray diffraction. The effect of the experimental factors such as content of magnesium chloride, concentration of cross-linking agent, initiator content on hygroscopic performance of the …

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    2021-6-16 · Anionic Polyacrylamide -7 series. ... Polyacrylamide is used in the preparation of acrylamide gels for separation of proteins. Packaging 10, 50 g in glass bottle Biochem/physiol Actions Polyacrylamide is a water-soluble polymer made up of acrylamide subunits. ... Get Price. A semi-interpenetrating network ionic composite hydrogel with. The ...

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    The problems analysis of anionic polyacrylamide - Vidar Water. Anionic polyacrylamide has no potential to bioaccumulate, being completely soluble in water (solubility is only limited by viscosity) and insoluble in octanol. Additionally, being a flocculant, it adsorbs onto suspended matter and, in this way, is removed from the water phase. Get Price

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    2017-12-13 · Lignin, a large scale by-product of pulp and paper industry 1 and bioethanol production 2, is considered the most abundant source of renewable aromatics on Earth 3,4.The current research efforts ...

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    Polyacrylamide/MgCl2 hybrid hydrogel desiccant was prepared from magnesium chloride and polyacrylamide by aqueous solution polymerization. The hybrid hydrogel was synthesized and characterized by X-ray diffraction. The effect of the experimental factors such as content of magnesium chloride, concentration of cross-linking agent, initiator content on hygroscopic performance of the …

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    2020-7-11 · Another low volume but important use of anionic and cationic polyacrylamides is gel electrophoresis for macromolecule separation. When an electic field is applied across a PAM gel, the (negatively) charged proteins or nucleic acids migrate across the gel away towards the positive electrode.

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    Cationic polyacrylamide copolymers (PAMs): environmental. Cationic polyacrylamide copolymers (PAMs) are used for sludge dewatering in municipal waste water treatment and might enter the environment by spreading of the sludge on agricultural land. Concern has been expressed since little is known about the degradation of PAMs in soils.

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    2014-3-18 · The absorption performances of hydrogel is employed to synthesize proton exchange membranes. • Incorporated H 3 PO 4 is sealed in the 3D framework of polyacrylamide-g-starch hydrogel.. A proton conductivity of 0.046 S cm −1 at 180 °C under anhydrous atmosphere is obtained.. A fuel cell shows a peak power density of 517 mW cm −2.

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    Preparation low dielectric constant material of cordierite with polyacrylamide gel method. Bing Zhang 1,2, Chuanbao Cao 3, Hesun Zhu 3 & Guobao Li 4 Journal of Materials Science volume 40, pages 1781–1783 (2005)Cite this article

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    2015-1-2 · and this prepared pH sensitive hydrogel shows varying swelling behaviour in response to change in pH. It gives low swelling activity in acidic medium and high swelling activity in 12. Thus when a drug is loaded in the hydrogel, release of the drug will be only in alkaline pH and the drug is sustained in the acidic environment i.e. the stomach.

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    2015-1-2 · and this prepared pH sensitive hydrogel shows varying swelling behaviour in response to change in pH. It gives low swelling activity in acidic medium and high swelling activity in 12. Thus when a drug is loaded in the hydrogel, release of the drug will be only in alkaline pH and the drug is sustained in the acidic environment i.e. the stomach.

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    Polyacrylamide gel system is widely been used in oilfield for water shutoff treatment. Gelation behavior such as proper gelation time provides a basic guideline on gel placement depth in reservoir layers. In this study, the gelation behavior of partially hydrolyzed polyacrylamide crosslinked with chromium(III) acetate (PHPA/Cr3+) reinforced with nano-silica was studied in term of gelation time ...

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