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New PLA/PEI-functionalized Fe3O4 nanocomposite: Preparation and characterization
Meisam Shabanian,Mehdi Khoobi,Farideh Hemati,Hossein Ali Khonakdar,Seyed esmaeil Sadat ebrahimi,Udo Wagenknecht,Abbas Shafiee 한국공업화학회 2015 Journal of Industrial and Engineering Chemistry Vol.24 No.-
In this work, Fe3O4 nanoparticles were functionalized with hyperbranched polyethylenimine (PEI). The neat Fe3O4 nanoparticles (MNP) and functionalized Fe3O4 (MNP@PEI) were separately incorporated into a polylactic acid (PLA). Compared to the neat MNP, the functionalized nanoparticles (MNP@PEI) had better dispersion in the PLA matrix. The properties of the nanocomposites were strongly related to the dispersion and interaction between the nanoparticles and PLA matrix. The heat barrier effect and high nitrogen content of the MNP@PEI nanoparticles were found to be responsible for the improvement of the thermal and flame resistance properties.
Faghihi, Khalil,Shabanian, Meisam,Hajibeygi, Mohsen The Polymer Society of Korea 2009 Macromolecular Research Vol.17 No.11
An optically active diacid containing the L-histidine moiety was prepared by reacting pyromellitic dianhydride (1,2,4,5-benzenetetracarboxylic acid 1,2,4,5-dianhydride) 1 with L-histidine 2 in acetic acid, and was polymerized with several aromatic diamines 5a-g to obtain a new series of optically active poly(amide-imide)s (PAIs) using two different methods, such as direct polycondensation in a medium consisting of N-methyl-2-pyrrolidone (NMP)/triphenyl phosphite (TPP)/calcium chloride ($CaCl_2$)/pyridine (Py) and direct polycondensation in a tosyl chloride (TsCl)/pyridine (Py)/N,N-dimethylformamide (DMF) system as a condensation agent. The resulting new polymers 6a-g with inherent viscosity was obtained in good yield. The polymers were readily soluble in polar organic solvents, such as N,N-dimethyacetamide (DMAc), N,N-dimethyformamide (DMF), and dimethyl sulfoxide (DMSO). The obtained polymers were characterized by FTIR, specific rotation, elemental analysis as well as $^1$H-NMR spectroscopy and gel permeation chromatography (GPC). The thermal stability of the resulting PAIs was evaluated with thermogravimetric analysis techniques under a nitrogen atmosphere.
Khalil Faghihi,Meisam Shabanian,Narjes Emamdadi 한국고분자학회 2010 Macromolecular Research Vol.18 No.8
A new series of aromatic poly(ester-imide)s (PEIs) 8a-f with 1,3-bis[4-aminophenoxy]propane moieties were prepared from the newly synthesized diacid monomer 6 with various aromatic diols 7a-f. The resulting polymers were fully characterized by Fourier transform infrared spectroscopy (FTIR) and 1H nuclear magnetic resonance spectroscopy (1H NMR), elemental analysis, inherent viscosity, solubility tests, thermogravimetric analysis (TGA),and derivative of thermogravimetric (DTG) analysis. The PEIs had inherent viscosity ranging from 0.18 to 0.90 dL/g and were soluble in common organic solvents, such as N,N-dimethylacetamide (DMAc), N-methyl-2-pyrrolidone (NMP), N,N-dimethylformamide (DMF), and dimethyl sulfoxide (DMSO). They exhibited useful thermal properties associated with relatively moderate Tgs (210-220 oC), 10% weight loss temperatures in excess of 380 oC, and char yields at 800 oC in N2 of up to 29%. Dicarboxylic acid 6 was synthesized from the reaction of 1,3-bis[3-aminophenoxy]propane 4 with trimellitic anhydride 5 in a solution of glacial acetic acid/pyridine (Py) at the refluxing temperature. 1,3-Bis[4-nitrophenoxy]propane 3 was prepared by a reaction of 4-nitrophenol 1 with 1,3-dibromo propane 2 in a DMF solution. Dinitro 3 was reduced to diamine 4 using 10% Pd-C, ethanol and hydrazine monohydrate.
Khalil Faghihi,Meisam Shabanian 한국고분자학회 2010 Macromolecular Research Vol.18 No.12
A new series of poly(ether-amide)s (PEAs) containing flexible methylene segments in the main chain were synthesized through a direct polycondensation reaction of 1,4-(4-carboxy phenoxy)butane with five ethereal diamine derivatives in a medium containing N-methyl-2-pyrrolidone, triphenyl phosphite, calcium chloride, and pyridine. The resulting polymers were fully characterized by proton nuclear magnetic resonance spectroscopy (1H NMR), Fourier transform infrared (FTIR) spectroscopy, elemental analyses, inherent viscosity, and solubility tests. The thermal properties of the polymers were examined by thermal gravimetric analysis (TGA) and differential thermal gravimetric (DTG). The glass-transition temperatures of the PEAs were determined by differential scanning calorimetry (DSC). The diacid was prepared from a reaction of 4-hydroxy benzoic acid with 1,4-dibromo butane in the presence of NaOH. New ethereal diamines were synthesized by a two-step reaction. In the first step, dinitro compounds were prepared from a reaction of two equimolars 4-nitrophenol and one equimolar of dibromo compounds. The resulting dinitro compounds were then reduced using 10% Pd-C, ethanol and hydrazine monohydrate.
Khalil Faghihi,Mohsen Hajibeygi,Meisam Shabanian 한국고분자학회 2010 Macromolecular Research Vol.18 No.5
A new-type of dicarboxylic acid 6 was synthesized from a reaction of 1,5-bis(4-aminophenyl)penta-1,4-dien-3-one 4 with trimellitic anhydride 5 in a glacial acetic acid/pyridine (Py) solution at refluxing temperature. Eight novel thermally stable poly(amide-imide)s (PAIs) 8a-h with good inherent viscosities were synthesized from a direct polycondensation reaction of N,N'-(1,5-bis(4-aminophenyl)penta-1,4-dien-3-one)bistrimellitimide 6 with several aromatic diamines 7a-h through direct polycondensation using the N-methyl-2-pyrrolidone (NMP)/pyridine (py)/triphenyl phosphite (TPP) system as a condensation agent. All the above polymers were fully characterized by 1H NMR, FTIR, elemental analysis, inherent viscosity, solubility tests, UV-vis spectroscopy, differential scanning calorimetry (DSC), thermogravimetric analysis (TGA), and the derivative of thermaogravimetric (DTG). The resulting poly(amide-imide)s (PAIs) 8a-h showed good inherent viscosities (0.41-0.70 dL/g), good thermal stability and solubility.
Faghihi, Khalil,Hajibeygi, Mohsen,Shabanian, Meisam The Polymer Society of Korea 2009 Macromolecular Research Vol.17 No.10
N,N'-(bicyclo[2,2,2]oct-7-ene-tetracarboxylic)-bis-L-amino acids 3a-g were synthesized by the condensation reaction of bicyclo[2,2,2]oct-7-ene-2,3,5,6-tetracarboxylic dianhydride 1 with two equimolars of Lalanine 2a, L-valine 2b, L-leucine 2c, L-isoleucine 2d, L-phenyl alanine 2e, L-2-aminobutyric acid 2f and L-histidine 2g in an acetic acid solution. Seven new poly(amide-imide)s PAIs 5a-g were synthesized through the direct polycondensation reaction of seven chiral N,N'-(bicyclo[2,2,2]oct-7-ene-tetracarboxylic)-bis-L-amino acids 3a-g with bis(3-amino phenyl) phenyl phosphine oxide 4 by two different methods: direct polycondensation in a medium consisting of N-methyl-2-pyrrolidone (NMP)/triphenyl phosphite (TPP)/calcium chloride ($CaCl_2$/pyridine (py), and direct polycondensation in a tosyl chloride (TsCl)/pyridine (py)/N,N-dimethylformamide (DMF) system. The polymerization reaction produced a series of flame-retardant and thermally stable poly(amide-imide)s 5a-g with high yield. The resulted polymers were fully characterized by FTIR, $^1H$ NMR spectroscopy, elemental analyses, inherent viscosity, specific rotation and solubility tests. Data obtained by thermal analysis (TGA and DTG) revealed that the good thermal stability of these polymers. These polymers can be potentially utilized in flame retardant thermoplastic materials.
Hajireza Ahmadi,Mehran Javanbakht,Behrouz Akbari-adergani,Meisam Shabanian 한국공업화학회 2020 Journal of Industrial and Engineering Chemistry Vol.89 No.-
This work presents a new β-cyclodextrin based hydrophilic thinfilm molecularly imprinted membrane(TF-MIM), with selective di(2-ethylhexyl) phthalate (DEHP) removal ability. Firstly, glycidyl methacry-late-bonded β-cyclodextrin (GMA-β-CD) is synthesized as a new dual function special functionalmonomer. Then TF-MIMs are fabricated at a short time, by fast photo-grafting of the GMA-β-CD asfunctional monomer and methylene bisacrylamide as cross-linker onto the polyethersulfone membranein the presence of DEHP as template in MeOH/H2O solution. The porosity and pore size of TF-MIMs aredetermined and characterized utilizing ATR-FTIR, FE-SEM and contact angle (CA) measurement. Thedecreasing of CAs of the TF-MIMs from 64 in the neat PES to 31.9 verify that the surface hydrophilicityimproved significantly. The DEHP adsorption ability of TF-MIMs are evaluated. The imprinting factor ofDEHP obtained in afiltration test is 2.6 and selectivity factors of DEHP with respect to dibutyl phthalateand dioctyl terephthalate are 3.5 and 4 respectively showing that TF-MIMs have good selective removalability for DEHP.
Mahsa Nemati,Sayed Mohsen Hosseini,Meisam Shabanian 한국화학공학회 2017 Korean Journal of Chemical Engineering Vol.34 No.6
Highly selective cation exchange membranes were prepared by coating a thin 2-acrylamido-2-methylpropanesulfonic acid based hydrogel layer and super activated carbon nanoparticles-co-hydrogel layer on polyvinyl chloride based cation exchange membranes. FTIR analysis proved hydrogel formation on membrane surface successfully. Scanning electron microscopy images and swelling ratio measurement were used to study the effect of super activated carbon nanoparticles on properties of formed hydrogel. The surface morphology, surface hydrophilicity and roughness analysis were also used in membrane characterization. Membrane water content was increased by formation of modified layer on the membranes surface. Modified membranes showed a remarkable improvement in potential, permselectivity and transport number compared to pristine type. Membrane ionic flux and permeability were improved initially by using modifier layer on membrane surface, and then showed decreasing trend at high nanoparticles loading ratios in hydrogel layer. Modified membranes showed lower electrical resistance compared to unmodified membrane.