Bacterial cellulose nanofibers as biobased reinforcement with biodegradability, renewability and good physical properties for the lightweight construction design of polymer composite materials with high performance are often explored. The current work addresses the fabrication of a series types of poly(methyl methacrylate) (PMMA) composites consisting of three different concentrations of bacterial cellulose nanofiber (BCNF) networks (1, 2, and 3 Wt.%) by solution casting method. The prepared PMMA/BCNF was characterized with scanning electron microscopy and thermogravimetric analysis (TGA). It was evident that the PMMA/BCNF nanocomposite film (1 Wt.%) has a flat and smooth surface and the BCNF filler is scattered on the PMMA surface matrix but barely detected in the PMMA/BCNF composite film due to the compatibility between the PMMA matrix and BCNF filler. TGA analysis demonstrates that plots shifted to higher temperatures with the increase of BCNF concentration in PMMA matrix. The wettability and mechanical properties of obtained composite films were studied and compared to neat PMMA. The results show that the PMMA/BCNF nanocomposite film (1 Wt.%) has the best hydrophilicity and mechanical properties such as tensile strength, tensile strain, and Young’s modulus. This work is intended to spur all researchers to more research and development for enhanced potential application of PMMA nanocomposites that are reinforced with BCNF in a wide application fields such as photocatalysis-wastewater treatment, packaging, flexible screens, optically transparent films
{"title":"Poly(methyl methacrylate)/ bacterial cellulose nanofiber nanocomposites prepared by solution casting method and its reinforcement study","authors":"Hossein Asiani, Mojdeh Mirshafiei","doi":"10.61186/cnj.1.4.203","DOIUrl":"https://doi.org/10.61186/cnj.1.4.203","url":null,"abstract":"Bacterial cellulose nanofibers as biobased reinforcement with biodegradability, renewability and good physical properties for the lightweight construction design of polymer composite materials with high performance are often explored. The current work addresses the fabrication of a series types of poly(methyl methacrylate) (PMMA) composites consisting of three different concentrations of bacterial cellulose nanofiber (BCNF) networks (1, 2, and 3 Wt.%) by solution casting method. The prepared PMMA/BCNF was characterized with scanning electron microscopy and thermogravimetric analysis (TGA). It was evident that the PMMA/BCNF nanocomposite film (1 Wt.%) has a flat and smooth surface and the BCNF filler is scattered on the PMMA surface matrix but barely detected in the PMMA/BCNF composite film due to the compatibility between the PMMA matrix and BCNF filler. TGA analysis demonstrates that plots shifted to higher temperatures with the increase of BCNF concentration in PMMA matrix. The wettability and mechanical properties of obtained composite films were studied and compared to neat PMMA. The results show that the PMMA/BCNF nanocomposite film (1 Wt.%) has the best hydrophilicity and mechanical properties such as tensile strength, tensile strain, and Young’s modulus. This work is intended to spur all researchers to more research and development for enhanced potential application of PMMA nanocomposites that are reinforced with BCNF in a wide application fields such as photocatalysis-wastewater treatment, packaging, flexible screens, optically transparent films","PeriodicalId":325688,"journal":{"name":"Colloid & Nanoscience Journal","volume":"13 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139631004","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Polymers are a versatile class of materials that have a wide range of applications, due to their unique physical and chemical properties. In this study, the effect of molar mass of PEG and temperature on the thermodynamic properties of aqueous solutions of L-histidine, has been studied. For this purpose, density, sound velocity and specific conductivity for solutions of L-histidine in pure water and in aqueous solutions of 0.02 w/w of PEG400, PEG2000 and PEG6000 have been measured at T = (298.15, 308.15 and 318.15) K. From the values of experimental density and sound velocity, the apparent molar volume, ɸ ʋ and apparent molar isentropic compressibility, ɸ K were calculated and extrapolated to infinite dilution. The transfer apparent molar volume at infinite dilution, ɸ and the transfer apparent molar isentropic compressibility, ɸ of L-histidine from water to aqueous PEG solutions have been studied. Also, by using of the measured specific conductivity for the investigated solutions in this work, molar conductivity Λ was calculated. The results show that the values of Λ for all the examined systems decrease with the increase in the concentration of amino acid.
{"title":"Volumetric, compressibility and conductometric studies of L-histidine in aqueous poly ethylene glycol solutions at different temperatures","authors":"H. Iloukhani, K. Khanlarzadeh, Tahereh Moradian","doi":"10.52547/cnj.1.2.74","DOIUrl":"https://doi.org/10.52547/cnj.1.2.74","url":null,"abstract":"Polymers are a versatile class of materials that have a wide range of applications, due to their unique physical and chemical properties. In this study, the effect of molar mass of PEG and temperature on the thermodynamic properties of aqueous solutions of L-histidine, has been studied. For this purpose, density, sound velocity and specific conductivity for solutions of L-histidine in pure water and in aqueous solutions of 0.02 w/w of PEG400, PEG2000 and PEG6000 have been measured at T = (298.15, 308.15 and 318.15) K. From the values of experimental density and sound velocity, the apparent molar volume, ɸ ʋ and apparent molar isentropic compressibility, ɸ K were calculated and extrapolated to infinite dilution. The transfer apparent molar volume at infinite dilution, ɸ and the transfer apparent molar isentropic compressibility, ɸ of L-histidine from water to aqueous PEG solutions have been studied. Also, by using of the measured specific conductivity for the investigated solutions in this work, molar conductivity Λ was calculated. The results show that the values of Λ for all the examined systems decrease with the increase in the concentration of amino acid.","PeriodicalId":325688,"journal":{"name":"Colloid & Nanoscience Journal","volume":"50 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125020494","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Due to the nano size, zinc oxide nanoparticles (ZoN) easily pass through the blood-brain barrier and can enter the brain cells and have different effects on different parts of the nervous system. In the present study, the effect of zinc oxide nanoparticles on the electrical activity of pyramidal cells in the CA1 region of the hippocampus in Parkinson's disease-like rats has been investigated. In this experimental study, adult male Wistar rats as model were randomly divided into five groups: Substantia nigra pars compacta (SNc) lesion (the lesions were induced by (Intra Peritoneal (IP)) injection of Rotenone 2mg/kg/19day/48h) and four groups of ZoN (lesions plus 0.5, 1, 1.5 and 3 mg/kg IP of ZoN. Spontaneous neural activity was recorded for all groups in the CA1 region of the hippocampus. The results revealed that IP injection of ZoN (1, 1.5 and 3 mg/kg) decreased neuronal spontaneous activity in the rat model of PD. The current study results suggested that acute IP injection of ZoN decreased neuronal response in the CA1 region of the hippocampal in a rat model of PD.
{"title":"Effects of zinc oxide nanoparticles on neuronal response of pyramidal neuron of the CA1 hippocampus in rat model of parkinson's disease","authors":"Mohammad Mohammad Ali Mansouri","doi":"10.52547/cnj.1.2.62","DOIUrl":"https://doi.org/10.52547/cnj.1.2.62","url":null,"abstract":"Due to the nano size, zinc oxide nanoparticles (ZoN) easily pass through the blood-brain barrier and can enter the brain cells and have different effects on different parts of the nervous system. In the present study, the effect of zinc oxide nanoparticles on the electrical activity of pyramidal cells in the CA1 region of the hippocampus in Parkinson's disease-like rats has been investigated. In this experimental study, adult male Wistar rats as model were randomly divided into five groups: Substantia nigra pars compacta (SNc) lesion (the lesions were induced by (Intra Peritoneal (IP)) injection of Rotenone 2mg/kg/19day/48h) and four groups of ZoN (lesions plus 0.5, 1, 1.5 and 3 mg/kg IP of ZoN. Spontaneous neural activity was recorded for all groups in the CA1 region of the hippocampus. The results revealed that IP injection of ZoN (1, 1.5 and 3 mg/kg) decreased neuronal spontaneous activity in the rat model of PD. The current study results suggested that acute IP injection of ZoN decreased neuronal response in the CA1 region of the hippocampal in a rat model of PD.","PeriodicalId":325688,"journal":{"name":"Colloid & Nanoscience Journal","volume":"142 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124568665","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Zahra Safikhani, A. Moghadassi, S. Bandehali, F. Ahmadi, Maryam Ghafari
In this study, a new type of polyethersulfone (PES)-based nanofiltration (NF) membrane was fabricated through the modification of membranes surface by using 4-aminobutyric acid-functionalized glycidyl POSS for the improvement of the physicochemical properties and membrane separation performance. Scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR), and 3D surface images, pure water flux, water content, water contact angle, salt rejection were used in membrane characterization. The SEM images showed the finger like structure for the modified membranes. Moreover, the SEM images of the membrane surface revealed the excellent dispersion of modified POSS particles on the membrane surface. The water content angle of fabricated membranes declined compared to the virgin PES membrane that indicates the enhancement of membrane hydrophilicity. Water content of the fabricated membranes enhanced from 68% for the neat PES membrane to 77.55% for the one fabricated membrane. However, the pure water flux revealed the decline trend. But among prepared membranes, M3 at 1.5 wt.% COOH-POSS concentration showed the best CrSO 4 rejection (80%) and Na 2 SO 4 rejection (62%). Moreover, M1 at 0.5 wt.% of COO-POSS showed the Pb(NO 3 ) 2 and Cu(NO 3 ) 2 rejection 83% and 80%, respectively
{"title":"Co-deposition of COOH-POSS on the surface of PES nanofiltration membranes for improving the permeability and anti-fouling properties","authors":"Zahra Safikhani, A. Moghadassi, S. Bandehali, F. Ahmadi, Maryam Ghafari","doi":"10.52547/cnj.1.2.83","DOIUrl":"https://doi.org/10.52547/cnj.1.2.83","url":null,"abstract":"In this study, a new type of polyethersulfone (PES)-based nanofiltration (NF) membrane was fabricated through the modification of membranes surface by using 4-aminobutyric acid-functionalized glycidyl POSS for the improvement of the physicochemical properties and membrane separation performance. Scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR), and 3D surface images, pure water flux, water content, water contact angle, salt rejection were used in membrane characterization. The SEM images showed the finger like structure for the modified membranes. Moreover, the SEM images of the membrane surface revealed the excellent dispersion of modified POSS particles on the membrane surface. The water content angle of fabricated membranes declined compared to the virgin PES membrane that indicates the enhancement of membrane hydrophilicity. Water content of the fabricated membranes enhanced from 68% for the neat PES membrane to 77.55% for the one fabricated membrane. However, the pure water flux revealed the decline trend. But among prepared membranes, M3 at 1.5 wt.% COOH-POSS concentration showed the best CrSO 4 rejection (80%) and Na 2 SO 4 rejection (62%). Moreover, M1 at 0.5 wt.% of COO-POSS showed the Pb(NO 3 ) 2 and Cu(NO 3 ) 2 rejection 83% and 80%, respectively","PeriodicalId":325688,"journal":{"name":"Colloid & Nanoscience Journal","volume":"48 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115959066","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Synthesis and Characterization of NaP zeolite@Fe3O4 /Am-Py as a Micro-Meso Structure","authors":"Z. Mortezaei, M. Zendehdel","doi":"10.52547/cnj.1.2.102","DOIUrl":"https://doi.org/10.52547/cnj.1.2.102","url":null,"abstract":"","PeriodicalId":325688,"journal":{"name":"Colloid & Nanoscience Journal","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131080444","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
In this article, cobalt thin films with 250, 500, and 1000 nm thicknesses were grown on the copper substrate by electrodeposition method. The crystal structure of the cobalt thin film was studied using X-ray diffraction (XRD) and found that the layer and substrate both have orientation (111) and (200). The roughness of the layers was investigated using an atomic force microscope (AFM) and the saturation roughness were measured 5.8, 7.9 and 10.1 nm for 250, 500 and 1000 nm thickness, respectively. Examination of the kinetic roughening of cobalt thin layers showed that they have an anomalous scaling. The magnetic properties of the thin films were checked using a vibrating sample magnetometer (VSM) and their hysteresis loops were drawn and coercivity of samples obtained about 2800 Oe.
{"title":"Kinetic roughening and magnetic study of Co electrodeposited thin films","authors":"M. Goodarzi, K. Hedayati","doi":"10.52547/cnj.1.2.97","DOIUrl":"https://doi.org/10.52547/cnj.1.2.97","url":null,"abstract":"In this article, cobalt thin films with 250, 500, and 1000 nm thicknesses were grown on the copper substrate by electrodeposition method. The crystal structure of the cobalt thin film was studied using X-ray diffraction (XRD) and found that the layer and substrate both have orientation (111) and (200). The roughness of the layers was investigated using an atomic force microscope (AFM) and the saturation roughness were measured 5.8, 7.9 and 10.1 nm for 250, 500 and 1000 nm thickness, respectively. Examination of the kinetic roughening of cobalt thin layers showed that they have an anomalous scaling. The magnetic properties of the thin films were checked using a vibrating sample magnetometer (VSM) and their hysteresis loops were drawn and coercivity of samples obtained about 2800 Oe.","PeriodicalId":325688,"journal":{"name":"Colloid & Nanoscience Journal","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126407500","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
In this research work silver/polystyrene nanocomposite has been prepared using polymerization of w/o microemulsion system with two various types of surfactants. In order to investigate effect of surfactant-polymer interaction on the quality of final nanocomposite product, AOT as anionic surfactant and tween 80 as non-ionic surfactant, isobuthanol as co-surfactant and styrene monomer as oil phase were used to prepare microemulsion systems. Surface tension of the microemulsions was measured as a criterion for the reaction media properties. The microemulsion systems were polymerized by benzoyl peroxide initiator following formation of Ag nanoparticles in the fluid medium. The UV-vis absorption analysis has been used to trace the growth process in the microemulsion system. Scanning electron microscopy (SEM) was used to determine the morphology, particle size and dispersion of the Ag in the synthesized nanocomposites. The idea established in current work can potentially be used to synthesis uniform and morphologically well-defined nanocomposites by microemulsion method.
{"title":"Effect of surfactant type on the particle dispersion in Ag/polystyrene nanocomposite prepared by microemulsion method","authors":"Fahimeh Alimohamadi, A. Salabat","doi":"10.52547/cnj.1.2.112","DOIUrl":"https://doi.org/10.52547/cnj.1.2.112","url":null,"abstract":"In this research work silver/polystyrene nanocomposite has been prepared using polymerization of w/o microemulsion system with two various types of surfactants. In order to investigate effect of surfactant-polymer interaction on the quality of final nanocomposite product, AOT as anionic surfactant and tween 80 as non-ionic surfactant, isobuthanol as co-surfactant and styrene monomer as oil phase were used to prepare microemulsion systems. Surface tension of the microemulsions was measured as a criterion for the reaction media properties. The microemulsion systems were polymerized by benzoyl peroxide initiator following formation of Ag nanoparticles in the fluid medium. The UV-vis absorption analysis has been used to trace the growth process in the microemulsion system. Scanning electron microscopy (SEM) was used to determine the morphology, particle size and dispersion of the Ag in the synthesized nanocomposites. The idea established in current work can potentially be used to synthesis uniform and morphologically well-defined nanocomposites by microemulsion method.","PeriodicalId":325688,"journal":{"name":"Colloid & Nanoscience Journal","volume":"53 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125599947","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
S. M. Hosseini, A. Moghadassi, L. Vafajoo, Javad Moradi
{"title":"Thermal performance of the seal oil cooler of the RFCC MCB Pump by using CNT-water nanofluids","authors":"S. M. Hosseini, A. Moghadassi, L. Vafajoo, Javad Moradi","doi":"10.52547/cnj.1.1.39","DOIUrl":"https://doi.org/10.52547/cnj.1.1.39","url":null,"abstract":"","PeriodicalId":325688,"journal":{"name":"Colloid & Nanoscience Journal","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132132912","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Green synthesis and characterization of NiFe2O4 nanostructure via hydrothermal method","authors":"T. Hosseinabad, G. Nabiyouni, K. Hedayati","doi":"10.52547/cnj.1.1.1","DOIUrl":"https://doi.org/10.52547/cnj.1.1.1","url":null,"abstract":"","PeriodicalId":325688,"journal":{"name":"Colloid & Nanoscience Journal","volume":"212 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133605968","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Effect of composition, electrolyte pH, annealing temperature and electrodeposition waveform on the magnetic properties of Co-Cu nanowire alloys","authors":"M. Najafi, Ramin Gholamhosseiny","doi":"10.52547/cnj.1.1.16","DOIUrl":"https://doi.org/10.52547/cnj.1.1.16","url":null,"abstract":"Arrays of Co 0.2 Cu x , with 0<x<0.1, nanowires (NWs) have been synthesized. CoCu NWs have been grown into the AAO templates by ac electrodeposition. The anodic aluminum oxide template (AAO) was synthesized by a two-step anodization process of pure Al foils in sulfuric acid. The effect of the small addition of Cu to Co NWs by varying the concentrations of Cu 2+ ions in the electrolyte, as well as the effect of annealing on the magnetic properties of NWs, was investigated. Eventually, the effect of changing waveforms applied to nanowire deposition was studied. The results showed that the coercivity of cobalt NWs decreased by adding copper impurity as a non-magnetic material from 1337 Oe to 660 Oe. By annealing of the alloy NWs up to 450 °C, the coercivity increases from 1140 Oe value for pure Co NWs up to 1541 Oe for CoCu NWs due to the removal of structural stresses of the nanowire.","PeriodicalId":325688,"journal":{"name":"Colloid & Nanoscience Journal","volume":"186 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132659535","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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