http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Effect of bio-template on the properties of SiO2/Al2O3 composites for drug delivery
Long-Yue Meng,Weiqi Jiang,Wen Xiang Piao,Wan Meng 한국공업화학회 2016 Journal of Industrial and Engineering Chemistry Vol.37 No.-
In this study, SiO2/Al2O3 composites (C-SLNs) were successfully synthesized using chitosan as thetemplate for drug delivery. The C-SLNs had higher specific surface areas (244–607 m2/g), total porevolumes (0.19–0.34 cm3 g 1), and narrow mesopore size distribution. The porosity of the C-SLNsprepared under high Si/Al ratio conditions was achieved mostly by the formation of wider pores thatwere distributed in the meso-/macro-pores. And, the C-SLNs were used as a levofloxacin carrier to studyits drug release behavior, which exhibited an initial fast release followed by a sustained release andantibacterial effectiveness over a long period.
Effect of nano-silica spheres template on CO2 capture of exchange resin-based nanoporous carbons.
Meng, Long-Yue,Park, Soo-Jin American Scientific Publishers 2013 Journal of Nanoscience and Nanotechnology Vol.13 No.1
<P>In this work, a nanoporous carbon-based adsorbent with a higher specific surface area was directly prepared from polystyrene-based cation exchange resin (PCER) by carbonization of a mixture of nano-silica spheres. The silica/PCER composites were carbonized at 1173 K with different silica/PCER ratios. The effects of nano-silica spheres content on the pore structures of nanoporous carbons were investigated by N2 full isotherms. The CO2 capture capacity was measured by CO2 isothermal adsorption at 298 K and 1 bar. From the results, it was found that the nano-silica spheres/PCER ratio had a major influence on the CO2 capture capacity and the textural properties of the prepared nanoporous carbons. The specific surface area and total pore volume, as well as the pore size of the nanoporous carbons increased with increasing silica/PCER ratio.</P>
Long-Yue Meng,박수진 대한화학회 2012 Bulletin of the Korean Chemical Society Vol.33 No.1
In this work, the reduced graphene nanosheets were synthesized from pre-exfoliated graphite flakes. The pristine graphite flakes were firstly pre-exfoliated to graphite nanoplatelets in the presence of acetic acid. The obtained graphite nanoplatelets were treated by Hummer’s method to produce graphite oxide sheets and were finally exfoliated to graphene nanosheets by ultrasonication and reduction processes. The prepared graphene nanosheets were studied by X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD), atomic force microscopy (AFM), and transmission electron microscopy (TEM). From the results, it was found that the preexfoliation process showed significant influence on preparation of graphite oxide sheets and graphene nanosheets. The prepared graphene nanosheets were applied to the preparation of conductive materials, which yielded a greatly improved electrical resistance of 200 Ω/sq.
Investigation of Narrow Pore Size Distribution on Carbon Dioxide Capture of Nanoporous Carbons
Long-Yue Meng,박수진 대한화학회 2012 Bulletin of the Korean Chemical Society Vol.33 No.11
Nanoporous carbons with a high specific surface area were prepared directly from thermoplastic acrylic resin as carbon precursor and MgO powder as template by carbonization over the temperature range, 500-1000 °C. The effect of the carbonization temperature on the pore structure and CO2 adsorption capacity of the obtained porous carbon was examined. The textural properties and morphology of the porous carbon materials were analyzed by N2/−196 °C and CO2/0 °C adsorption/desorption isotherms, SEM and TEM. The CO2 adsorption capacity of the prepared porous carbon was measured at 25 °C and 1 bar and 30 bar. The specific surface area increased from 237 to 1251 m2/g, and the total pore volumes increased from 0.242 to 0.763 cm3/g with increasing the carbonization temperature. The carbonization temperature acts mainly by generating large narrow micropores and mesopores with an average pore size dependent on the level of carbonization of the MgO-templated nanoporous carbons. The results showed that the MgO-templated nanoporous carbons at 900 °C exhibited the best CO2 adsorption value of 194 mg/g at 1 bar.
Long-Yue Meng,박수진 한국물리학회 2013 Current Applied Physics Vol.13 No.4
Conducting glass fiber fabrics (GFs) with double-scale roughness were fabricated by growing carbon nanofibers (CNFs) on its surfaces. The homogeneous growth of CNFs was achieved by the decomposition of C2H2 on glass fibers surfaces coated with Fe-doped mesoporous silica films at different C2H2 flow rates. The chemical composition and surface structure of the GFs before and after CNFs growth were examined by electron dispersive X-ray spectrometry (EDX), N2 full isotherms, and scanning electron microscopy (SEM). The electrical properties of the GFs were examined using a four-probe volume resistivity tester. The CNFs with a mean diameter of 50 nm grew uniformly and densely on the glass fiber surfaces. The CNFs/GFs fabrics surface exhibited excellent electrochemical properties due to the CNFs. The specific capacitance of the GFs ranged from 0.2 to 4 F/g at 1 A/g in a 1 M H2SO4 aqueous solution.
Preparation and characterization of agricultural waste-based porous carbons for adsorbents
( Long-yue Meng ),( Haili Pan ),박수진 한국공업화학회 2015 한국공업화학회 연구논문 초록집 Vol.2015 No.0
In this work, a series of porous carbons were used to delineate agricultural waste the role of micro-/meso-pores in CO2 adsorption. Porous carbons were prepared from corncob by the carbonization of a mixture with magnesium acetate. And then, the prepared porous carbons were activated with CO2. The textural properties of porous carbons were investigated by N2/77 K full isotherms and SEM. This result indicated that the porosity of porous carbons attributed to the MgO template and CO2 activation. It was also found that the CO2 activation led to an increase in CO2 adsorption efficiency of porous carbons, mainly due to an increase of microporosity on porous carbon surfaces.
Enhancement of superhydrophobicity and conductivity of carbon nanofibers-coated glass fabrics
Long-Yue Meng,박수진,이경엽 한국공업화학회 2014 Journal of Industrial and Engineering Chemistry Vol.20 No.4
This paper explores the role of carbon nanofibers (CNFs) on its potential to produce surperhydrophobic and conductive surfaces of glass fiber (GF) fabrics when processed by the catalytic chemical vapor deposition. Large-area helical CNFs were prepared over GF surfaces by the pyrolysis of acetylene. CNFs/GFs composites were characterized by XPS, SEM, and contact angle measurements. The results indicate the CNFs/GF fabrics surface exhibited excellent superhydrophocity and electroconductivity due to the grown CNFs The contact angle and volume resistivity of CNFs decorating the GF fabrics was equal to 1528 and 1.13 10 3 V cm, respectively.