Organoclay-modified hydroxylterminated polysulfone (PSF)/epoxy interpenetrating network nanocomposites (oM-PSF/EP nanocomposites) were prepared by adding organophilic montmorillonite (oMMT) to interpenetrating polymer...Organoclay-modified hydroxylterminated polysulfone (PSF)/epoxy interpenetrating network nanocomposites (oM-PSF/EP nanocomposites) were prepared by adding organophilic montmorillonite (oMMT) to interpenetrating polymer networks (IPNs) of polysulfone and epoxy resin (PSF/EP) using diaminodiphenylmethane (DDM) as curing agent.The mechanical properties like tensile strength,tensile modulus,flexural strength,flexural modulus and impact properties of the nanocomposites were studied as per ASTM standards.Different...展开更多
Cyclophosphazene nanotube （PZT） incorporated poly（benzoxazine-co-g-caprolactam） （P（BZ-co-CPL）） nano- composites were developed for improving flame retardant properties. The effects of PZT on the flammability p...Cyclophosphazene nanotube （PZT） incorporated poly（benzoxazine-co-g-caprolactam） （P（BZ-co-CPL）） nano- composites were developed for improving flame retardant properties. The effects of PZT on the flammability properties of P（BZ-co-CPL） matrix were evaluated through UL-94 flammability test and limiting oxygen index （LOI）. The UL-94 results of P（BZ-co-CPL）/PZT hybrid nanocomposites showed V-1 rating, whereas neat P（BZ-co-CPL） showed burning rating. The LOI values are increased from 25.4 to 31.4 for 1.5 wt% PZT incorporated P（BZ-co-CPL） nanocomposite systems. SEM was used to study the char morphology of P（BZ-co-CPL）/PZT after being exposed to UL-94 flammability test. Data from thermal studies indicate that the PZT incorporated P（BZ-co-CPL） systems possess better Tg and thermal degradation behavior when compared to the neat P（BZ-co-CPL）. The values of dielectric constant are decreased with increasing temperature. From the values, it is ascertained that the P（BZ-co-CPL）/PZT systems exhibit stable dielectric behavior with regard to variation in temperature. The TEM images ascertain the uniform dispersion of PZT in the P（BZ-co-CPL） matrix.展开更多
Synthesis and structural characterization of Pb nanoparticles by electrolysis using a bioactive compound-konjac aqueous extract is the main aim of this study.This method is a unique,novel,low cost and double-step proc...Synthesis and structural characterization of Pb nanoparticles by electrolysis using a bioactive compound-konjac aqueous extract is the main aim of this study.This method is a unique,novel,low cost and double-step procedure with good reproducibility and has not been used for nanoparticles preparation so far.Konjac extract has been added to prevent the oxidation of Pb nanoparticles.Also the synthesized nanoparticles have been dried in open air to observe their stability.Various types of characterization tools have been utilized to study characters of the end product.Anti-bacterial Studies has also been done.After completion of synthesis process that we have made an attempt to change the shape of the synthesized nanoparticles by the influence of sunbeams and to find the effects of the sunlight on nanomaterials.展开更多
This work reports a simple,novel,cost effective and eco-friendly electrolytic synthesis of silver nanoparticles using AgNO3 as metal precursor.The synthesis rate is much faster than other methods and this approach is ...This work reports a simple,novel,cost effective and eco-friendly electrolytic synthesis of silver nanoparticles using AgNO3 as metal precursor.The synthesis rate is much faster than other methods and this approach is suitable for large scale production.They are characterized by XRD,SEM and FT-IR techniques to analyze size,morphology and functional groups.XRD studies reveal a high degree of crystallinity and monophasic Ag nanoparticles.Their particle size is found to be 24 nm and specific surface area(SSA)is 24 m2 g-1.Analysis of Ag nanoparticles SSA reports that increasing their SSA improves their antibacterial actions.Microbiology assay founds that Ag nanoparticles are effective against E.coli and B.megaterium bacteria.SSA of bacteria analysis reveals that it plays a major role while reacting with antimicrobial agents.展开更多
This work reports aspect related to nano-sized particles of jackfruit seed.FTIR spectrum was recorded for functional groups analysis and EDAX analysis was done to identify the various elements of the sample.Both FTIR ...This work reports aspect related to nano-sized particles of jackfruit seed.FTIR spectrum was recorded for functional groups analysis and EDAX analysis was done to identify the various elements of the sample.Both FTIR and EDAX analysis results indicated the presence of Starch.FTIR analysis confirmed the availability of anti-microbial Sulphur derivatives compounds.Microbiology assay found that jackfruit seed nanoparticles were effective against Escherichia coli and Bacillus megaterium bacteria.This work also investigated about the dual-function of the sample i.e.food ingredients possessing antimicrobial activities.Specific surface area of bacteria analysis revealed that it played a major role while on reactions with jackfruit seed nanoparticles.展开更多
The preparation of biodegradable nanomaterials by blending starch nanocrystals with various polymer matrices are the most active research.This work reports aspect related to nano-sized particles of jackfruit seed.This...The preparation of biodegradable nanomaterials by blending starch nanocrystals with various polymer matrices are the most active research.This work reports aspect related to nano-sized particles of jackfruit seed.This approach is simple,faster,eco-friendly,cost effective and suitable for large scale production.X-Ray Diffraction studies analyze particles size,morphology,type of starch and degree of crystallinity.The particle size is found to be 12nm,specific surface area is 625m^(2) g^(-1),contains A-type starch and 32%degree of crystallinity.A morphology index(MI)is developed from FWHM of XRD data to understand interrelationship of particle size and specific surface area.MI range is from 0.50 to 0.74.It is correlated with the particle size and specific surface area.It is observed that MI has direct relationship with particle size and an inverse relationship with specific surface area.展开更多
文摘Organoclay-modified hydroxylterminated polysulfone (PSF)/epoxy interpenetrating network nanocomposites (oM-PSF/EP nanocomposites) were prepared by adding organophilic montmorillonite (oMMT) to interpenetrating polymer networks (IPNs) of polysulfone and epoxy resin (PSF/EP) using diaminodiphenylmethane (DDM) as curing agent.The mechanical properties like tensile strength,tensile modulus,flexural strength,flexural modulus and impact properties of the nanocomposites were studied as per ASTM standards.Different...
基金financially supported by the BRNS,G.No.2012/37C/9/BRNS,Mumbai,Govt.of India
文摘Cyclophosphazene nanotube （PZT） incorporated poly（benzoxazine-co-g-caprolactam） （P（BZ-co-CPL）） nano- composites were developed for improving flame retardant properties. The effects of PZT on the flammability properties of P（BZ-co-CPL） matrix were evaluated through UL-94 flammability test and limiting oxygen index （LOI）. The UL-94 results of P（BZ-co-CPL）/PZT hybrid nanocomposites showed V-1 rating, whereas neat P（BZ-co-CPL） showed burning rating. The LOI values are increased from 25.4 to 31.4 for 1.5 wt% PZT incorporated P（BZ-co-CPL） nanocomposite systems. SEM was used to study the char morphology of P（BZ-co-CPL）/PZT after being exposed to UL-94 flammability test. Data from thermal studies indicate that the PZT incorporated P（BZ-co-CPL） systems possess better Tg and thermal degradation behavior when compared to the neat P（BZ-co-CPL）. The values of dielectric constant are decreased with increasing temperature. From the values, it is ascertained that the P（BZ-co-CPL）/PZT systems exhibit stable dielectric behavior with regard to variation in temperature. The TEM images ascertain the uniform dispersion of PZT in the P（BZ-co-CPL） matrix.
文摘Synthesis and structural characterization of Pb nanoparticles by electrolysis using a bioactive compound-konjac aqueous extract is the main aim of this study.This method is a unique,novel,low cost and double-step procedure with good reproducibility and has not been used for nanoparticles preparation so far.Konjac extract has been added to prevent the oxidation of Pb nanoparticles.Also the synthesized nanoparticles have been dried in open air to observe their stability.Various types of characterization tools have been utilized to study characters of the end product.Anti-bacterial Studies has also been done.After completion of synthesis process that we have made an attempt to change the shape of the synthesized nanoparticles by the influence of sunbeams and to find the effects of the sunlight on nanomaterials.
文摘This work reports a simple,novel,cost effective and eco-friendly electrolytic synthesis of silver nanoparticles using AgNO3 as metal precursor.The synthesis rate is much faster than other methods and this approach is suitable for large scale production.They are characterized by XRD,SEM and FT-IR techniques to analyze size,morphology and functional groups.XRD studies reveal a high degree of crystallinity and monophasic Ag nanoparticles.Their particle size is found to be 24 nm and specific surface area(SSA)is 24 m2 g-1.Analysis of Ag nanoparticles SSA reports that increasing their SSA improves their antibacterial actions.Microbiology assay founds that Ag nanoparticles are effective against E.coli and B.megaterium bacteria.SSA of bacteria analysis reveals that it plays a major role while reacting with antimicrobial agents.
文摘This work reports aspect related to nano-sized particles of jackfruit seed.FTIR spectrum was recorded for functional groups analysis and EDAX analysis was done to identify the various elements of the sample.Both FTIR and EDAX analysis results indicated the presence of Starch.FTIR analysis confirmed the availability of anti-microbial Sulphur derivatives compounds.Microbiology assay found that jackfruit seed nanoparticles were effective against Escherichia coli and Bacillus megaterium bacteria.This work also investigated about the dual-function of the sample i.e.food ingredients possessing antimicrobial activities.Specific surface area of bacteria analysis revealed that it played a major role while on reactions with jackfruit seed nanoparticles.
文摘The preparation of biodegradable nanomaterials by blending starch nanocrystals with various polymer matrices are the most active research.This work reports aspect related to nano-sized particles of jackfruit seed.This approach is simple,faster,eco-friendly,cost effective and suitable for large scale production.X-Ray Diffraction studies analyze particles size,morphology,type of starch and degree of crystallinity.The particle size is found to be 12nm,specific surface area is 625m^(2) g^(-1),contains A-type starch and 32%degree of crystallinity.A morphology index(MI)is developed from FWHM of XRD data to understand interrelationship of particle size and specific surface area.MI range is from 0.50 to 0.74.It is correlated with the particle size and specific surface area.It is observed that MI has direct relationship with particle size and an inverse relationship with specific surface area.
