scholarly journals BSA Adsorption and Antibiofilm Properties of (N-Cyclohexylacrylamide-co-Acrylamide/AMPSNa) Hydrogels

2021 ◽  
pp. 335-343
Author(s):  
K. Jayanthi ◽  
P. Pazhanisamy
Keyword(s):  
Microtiter Plate ◽  
Radical Copolymerization ◽  
Adsorption Efficiency ◽  
Free Radical Copolymerization ◽  
Microtiter Plate Assay ◽  
Ionic Monomer ◽  
Fixed Proportion ◽  
Ft Ir ◽  
Cross Linker ◽  
Bsa Adsorption

The hydrogels poly (N-cyclohexylacrylamide-co-acrylamide/2-acrylamido-2-methyl-1-propanesodiumsulfonate) i.e.poly(NCA-co-AM/AMPSNa) (HG41,HG42,HG43&HG44) were synthesised via  free-radical copolymerization of NCA and (AM) in a fixed proportion  (50:50), but varying the ionic monomer-AMPSNa (0.1g,0.3g,0.5 d 0.7g) in a medium of mixture of water and methanol  at 60°C in an oil bath, Potassium persulfate (KPS) was used as an initiator, while N,N'-methylene-bisacrylamide (MBA) was used as a cross-linker. FT-IR spectral data, SEM, XRD, and TGA techniques were used to characterise the synthesised hydrogel (HG43). On changing pH(3.0, 5.0, 7.0 & 9.0), the amount of Bovine Serum Albumin (BSA) adsorption efficiency by  these hydrogels was evaluated. At pH 5.0, which is near to BSA's isoelectric point (4.7)., the maximum adsorption was found. BSA adsorption increased as the amount of AMPSNa increased. SEM and XRD were used to examine the BSA-adsorbed hydrogel (HG43). The antibiofilm abilities of the hydrogel (HG43) by Microtiter plate Assay(MTP), Fluorescence microscopy and SEMl against Staphylococcus aureus and Pseudomonas aureginosa displayed outstanding efficacy.

scholarly journals Synthesis, Characterization and Copolymerization of N-(phenylamino)maleimide with MMA

2007 ◽  
Vol 4 (2) ◽  
pp. 265-271
Author(s):  
B. L. Hiran ◽  
S. N. Paliwal ◽  
Jyoti Choudhary ◽  
P. R. Choudhary
Keyword(s):  
Thermal Stability ◽  
Molecular Weight ◽  
Density Measurement ◽  
Gel Permeation Chromatography ◽  
Radical Copolymerization ◽  
Free Radical Copolymerization ◽  
H Nmr ◽  
Gel Permeation ◽  
Ft Ir ◽  
Thermal Stability Of

The free radical copolymerization of N-(phenylamino)maleimide (N-PAMI) was carried. The copolymerization with methyl methacrylate (MMA) was performed at 65°C with AIBN as the initiator in THF solvent. Resulting copolymer was characterized by density measurement, intrinsic viscosity, solubility, FT-IR &1H NMR spectroscopy. Effect of the solvent and time on copolymer yield was also investigated. The molecular weight of copolymer was determined by gel permeation chromatography (GPC). The thermal stability of copolymer was determined by Thermogravimetric analysis (TGA).

scholarly journals Stereocomplex Poly(Lactic Acid) Amphiphilic Conetwork Gel with Temperature and pH Dual Sensitivity

Polymers ◽  
2019 ◽  
Vol 11 (12) ◽  
pp. 1940 ◽  
Author(s):  
Jie Wu ◽  
Xiaoyu Shi ◽  
Zhidan Wang ◽  
Fei Song ◽  
Wenli Gao ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Lactic Acid ◽  
Radical Copolymerization ◽  
Ph Sensitivity ◽  
Proton Nuclear Magnetic Resonance ◽  
Poly Lactic Acid ◽  
X Ray Diffraction ◽  
Free Radical Copolymerization ◽  
Good Thermal Stability ◽  
Ft Ir

A novel stereocomplex poly(lactic acid) amphiphilic conetwork gel with temperature and pH dual sensitivity was synthesized by ring-opening polymerization (ROP) and free radical copolymerization. The chemical structure and composition of hydrogel were characterized by Fourier transform infrared spectroscopy (FT-IR), proton nuclear magnetic resonance (1H NMR) and X-ray diffraction (XRD). The temperature and pH sensitivity and good amphiphilicity of hydrogel were studied using digital photos, the swelling ratios and a scanning electron microscope (SEM). The thermal stability and mechanical properties of hydrogel were studied by differential scanning calorimeter (DSC) and dynamic viscoelastic spectrometer. The results indicated that the hydrogel has amphiphilicity, temperature and pH sensitivity, good thermal stability and mechanical strength.

scholarly journals P(N-Phenylmaleimide-Alt-Styrene) Introduced with 4-Carboxyl and Its Effect on the Heat Deflection Temperature of Nylon 6

Materials ◽  
2018 ◽  
Vol 11 (11) ◽  
pp. 2330 ◽  
Author(s):  
Yufei Liu ◽  
Min He ◽  
Daohai Zhang ◽  
Qian Zhao ◽  
Yang Li ◽  
...  
Keyword(s):  
Dynamic Viscosity ◽  
Gel Permeation Chromatography ◽  
Nylon 6 ◽  
Mechanical Analysis ◽  
Radical Copolymerization ◽  
Resonance Spectroscopy ◽  
Scanning Calorimetry ◽  
Free Radical Copolymerization ◽  
Ft Ir ◽  
Heat Deflection Temperature

P(N-phenylmaleimide-alt-styrene) (P(NPMI-alt-St)) and P(N-(4-carboxyphenyl)maleimide-alt-styrene) (P(CPMI-alt-St)) were designed and synthesized via free radical copolymerization. Fourier transform infrared spectroscopy (FT-IR), nuclear magnetic resonance spectroscopy (1H NMR and 13C NMR), gel permeation chromatography (GPC), and differential scanning calorimetry (DSC) were used to confirm the structure of P(NPMI-alt-St) and P(CPMI-alt-St). Next, the effect of P(CPMI-alt-St) on the heat deflection temperature (HDT) of nylon 6 was studied. In comparison to the PA6/P(NPMI-alt-St) blend, with the addition of 10 wt %, the HDT value of the PA6/P(CPMI-alt-St) blend increased by 15.7 °C, and the glass transition temperature (Tg) by Dynamic mechanical analysis (DMA) increased 2.3 °C. According to the analysis of DMA, dynamic viscosity, and the SEM of PA6 and its blends, P(CPMI-alt-St) promoted its compatibility with PA6, and promoted the storage modulus and dynamic viscosity of the blends. Thus, the introduction of 4-carboxyl can significantly improve the effect of P(CPMI-alt-St) on the heat resistance modification of nylon 6.

scholarly journals Electron Beam Synthesis and Characterization of Acrylamide/Acrylic Acid Hydrogels Using Trimethylolpropane Trimethacrylate as Cross-Linker

2016 ◽  
Vol 2016 ◽  
pp. 1-14 ◽  
Author(s):  
Gabriela Craciun ◽  
Elena Manaila ◽  
Maria Daniela Stelescu
Keyword(s):  
Electron Beam ◽  
Acrylic Acid ◽  
Dose Range ◽  
Absorbed Dose ◽  
Radical Copolymerization ◽  
Synthesis And Characterization ◽  
Free Radical Copolymerization ◽  
Swelling Properties ◽  
Cross Linker

The purpose of the paper is to present the synthesis and characterization of hydrogels prepared by free-radical copolymerization of acrylamide and acrylic acid in aqueous solutions using potassium persulfate as initiator and trimethylolpropane trimethacrylate as cross-linker, via the radiation technique. The samples were subjected to electron beam treatment in the dose range of 2 to 4 kGy and the influence of the absorbed dose and amount of cross-linker on the swelling properties, diffusion coefficient, and network parameters of hydrogels was investigated. A possible reaction mechanism for acrylamide/acrylic acid/trimethylolpropane trimethacrylate hydrogels was also suggested. The structure and morphology of hydrogels were characterized by Fourier Transform Infrared Spectroscopy and Scanning Electron Microscopy.

A novel film-forming silicone polymer as shale inhibitor for water-based drilling fluids

e-Polymers ◽  
2019 ◽  
Vol 19 (1) ◽  
pp. 574-578 ◽  
Author(s):  
Jinsheng Sun ◽  
Fan Zhang ◽  
Kaihe Lv ◽  
Xiaofeng Chang
Keyword(s):  
Immersion Test ◽  
Decomposition Temperature ◽  
Radical Copolymerization ◽  
Drilling Fluids ◽  
Free Radical Copolymerization ◽  
Gas Drilling ◽  
Film Forming ◽  
Ft Ir ◽  
Inhibition Performance ◽  
Better Than

AbstractA novel shale inhibitor was synthesized by free radical copolymerization in aqueous solution, using acrylic acid (AA), acrylamide (AM), maleic anhydride (MA) KH-570 as reaction monomers and potassium persulfate as initiator. The structure of the copolymer was characterized by Fourier transform infrared spectroscopy (FT-IR). Thermogravimetric analysis (TGA) showed that the thermal decomposition temperature of the copolymer was higher than 226°C, which indicated that the copolymer had good high temperature resistance. At the same time, the inhibition performance of the copolymer was further evaluated by linear expansion, immersion test and rolling recovery. The experimental results show that the inhibition performance of organosilicon polymer is obviously better than that of potassium chloride (KCl) and potassium polyacrylate (KPAM), and it can be used as an inhibitor in shale gas drilling.

scholarly journals Reactivity Ratios of the Copolymerization Styrene/ Methyl Methacrylate Using FT-IR Spectroscopy with Comparing to Mathematically Method

2012 ◽  
Vol 9 (4) ◽  
pp. 695-702 ◽  
Author(s):  
Baghdad Science Journal
Keyword(s):  
Methyl Methacrylate ◽  
Linearization Method ◽  
Radical Copolymerization ◽  
Copolymer Composition ◽  
Reactivity Ratios ◽  
Monomer Reactivity Ratios ◽  
Free Radical Copolymerization ◽  
Average Value ◽  
Integral Curves ◽  
Ft Ir

Free Radical Copolymerization of Styrene/ Methyl Methacrylate were prepared chemically under Nitrogen ,which was investigated, in the present of Benzoyl Peroxide as Initiator at concentration of 2 × 10-3 molar at 70 °C, which was carried out in Benzene as solvent to a certain low conversion . FT-IR spectra were used for determining of the monomer reactivity ratios ,which was obtained by employing the conventional linearization method of Fineman-Ross (F-R) and Kelen-Tüdos (K- T). The experimental results showed the average value for the Styrene r1 / Methyl Methacrylate r2 system, Sty r1 = 0.45 , MMA r2 = 0.38 in the (F–R) Method and r1 = 0.49 , r2 = 0.35 in the (K–T) Method, The Results of this indicated show the random distribution of monomers in the copolymer.Likewise The monomer reactivity ratios were evaluated Mathematically in comparison in the (F–R) Method with the data STY r1 = 0.61 , MMA r2 = 0.47 , and r1 = 0.45 , r2 =0.38 in the (K–T) Method. And were used the values r1 ,r2 for STY / MMA Copolymers in computing integral curves for the instantaneous Copolymer composition throughout the whole range of conversion.

scholarly journals Synthesis, Characterization and Antimycobacterial Activity of Phenanthrenequinone Thiosemicarbazones and their Ruthenium and Zinc Complexes

2021 ◽  
Vol 33 (5) ◽  
pp. 983-988
Author(s):  
Ashok K. Singh ◽  
Shailendra K. Singh ◽  
Kavita Dhariyal ◽  
Ram Kumar ◽  
Amarendra Kumar ◽  
...  
Keyword(s):  
13C Nmr ◽  
Density Functional ◽  
Antimycobacterial Activity ◽  
Microtiter Plate ◽  
Tridentate Ligands ◽  
Functional Theory ◽  
Microtiter Plate Assay ◽  
Esi Ms ◽  
Ft Ir ◽  
Inhibition Control

The substituted phenanthrenequinone thiosemicarbazones (HL1, HL2 and HL3), and their metal complexes (M = Ru(II) or Zn(II); SM1, SM2, SM3 and SM4) were synthesized and characterized by FT-IR, 1H & 13C NMR and ESI-MS. The spectral data IR, 1H & 13C NMR and ESI-MS indicates two tridentate ligands coordinating in the form of an octahedral geometry. The gas phase geometry of all the zinc(II) and ruthenium(II) complexes was carried by using density functional theory (DFT). The antimycobacterial susceptibility testing at 100 μM of the complexes using resazurin microtiter plate assay resulted in growth inhibition. Complexes SM2, SM3 and SM4 showed good antimycobacterial activity at 100 μM concentration by using rifampicin as inhibition control.

scholarly journals Novel Self-Healing Metallocopolymers with Pendent 4-Phenyl-2,2′:6′,2″-terpyridine Ligand: Kinetic Studies and Mechanical Properties

Polymers ◽  
2021 ◽  
Vol 13 (11) ◽  
pp. 1760
Author(s):  
Rose K. Baimuratova ◽  
Gulzhian I. Dzhardimalieva ◽  
Evgeniy V. Vaganov ◽  
Valentina A. Lesnichaya ◽  
Gulsara D. Kugabaeva ◽  
...  
Keyword(s):  
Critical Role ◽  
Specific Effect ◽  
Kinetic Studies ◽  
Radical Copolymerization ◽  
Self Healing ◽  
Free Radical Copolymerization ◽  
Polymer Hydrogels ◽  
Close Proximity ◽  
Metal Group ◽  
Metal Polymer

We report here our successful attempt to obtain self-healing supramolecular hydrogels with new metal-containing monomers (MCMs) with pendent 4-phenyl-2,2′:6′,2″-terpyridine metal complexes as reversible moieties by free radical copolymerization of MCMs with vinyl monomers, such as acrylic acid and acrylamide. The resulting metal-polymer hydrogels demonstrate a developed system of hydrogen, coordination and electron-complementary π–π stacking interactions, which play a critical role in achieving self-healing. Kinetic data show that the addition of a third metal-containing comonomer to the system decreases the initial polymerization rate, which is due to the specific effect of the metal group located in close proximity of the active center on the growth of radicals.

High-pressure free-radical copolymerization of ethene and 2-ethylhexyl acrylate

1996 ◽  
Vol 197 (12) ◽  
pp. 4119-4134 ◽  
Author(s):  
Michael Buback ◽  
Thomas Dröge ◽  
Alex Van Herk ◽  
Frank-Olaf Mähling
Keyword(s):  
High Pressure ◽  
Free Radical ◽  
Radical Copolymerization ◽  
Free Radical Copolymerization

In Vitro Mineralization and Cell Adhesion on Surface Modified Poly (2 - hydroxy ethyl methacrylate-co-methyl methacrylate

2006 ◽  
Vol 309-311 ◽  
pp. 493-496 ◽  
Author(s):  
G.S. Sailaja ◽  
T.V. Kumari ◽  
Yoshiyuki Yokogawa ◽  
H.K. Varma
Keyword(s):  
Cell Adhesion ◽  
Calcium Phosphate ◽  
Methyl Methacrylate ◽  
Radical Copolymerization ◽  
Sem Analysis ◽  
Free Radical Copolymerization ◽  
In Vitro Mineralization ◽  
Atr Spectroscopy ◽  
Surface Modified

Poly(2-hydroxyethyl methacrylate-co- methyl methacrylate) HM, was synthesized by free radical copolymerization, cross-linked with ethylene glycol dimethacrylate and phosphorylated. The phosphate coupling was ensured by ATR spectroscopy. The in vitro mineralization ability of the phosphorylated HM (designated as PHM) was investigated by studying the nucleation and growth of calcium phosphate on its surface by immersing in simulated body fluid (SBF) solution. The coating morphology was studied by SEM and the Ca/P ratio of the coating by EDX analysis. The cell adhesion behaviour of PHM was studied by seeding Human osteosarcoma (HOS) cells for one week followed by SEM analysis along with HM as control. It was observed that HOS cells exhibited biomineralization of calcium phosphate on the surface of HM as well as on PHM with a significantly higher amount on the surface of PHM as observed by von kossa staining method. The results show that PHM is capable of in vitro mineralization under simulated physiological condition, promotes cell adhesion by providing an excellent cell friendly surface and it exhibits biomineralization of calcium phosphate in presence of HOS cells.

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