Search results

Capacitive Properties of Polyaniline/Nickel Hydroxide Composites Prepared by Using 4-amino Thiophenol as the Structure Directing Agent Yu-qiu Huo1, a, Chang-hong Li1 1Department of Chemistry, College of Science, Northeastern University, Shenyang 110819, People’s Republic of China ahuoyuqiu@mail.neu.edu.cn Keywords: polyaniline, nickle hydroxide, 4-amino thiophenol, capacitive properties Abstract.
As we have synthesized the 3D nanostructured PANI-MnOx porous microspheres by oxidizing aniline with KMnO4 under interfacial chemical synthesis with 4-aminothiophenol (4-ATP) as the structure-directing agent on the Au substrate[8].
So in this paper we prepared PANI/Ni(OH)2 by oxidizing aniline with (NH4)2S2O8 under interfacial chemical synthesis with 4-aminothiophenol (4-ATP) as the structure-directing agent on the Au substrate.

Structures and Properties of Isotactic-Polypropylene/Synthesized Micro Cellulose Tray: Effects of Micro Cellulose Loading Pongpat Sukhavattanakul1,a, Lerpong Jarupan1,2,b and Chiravoot Pechyen1,2,c 1Department of Packaging and Materials Technology, Faculty of Agro-Industry, Kasetsart University, Bangkok 10900, Thailand 2Center for Advanced Studies in Agriculture and Food, KU Institute for Advanced Studies, Kasetsart University, Bangkok 10900, Thailand (CASAF, NUR-KU, Thailand) apongpat.sk@hotmail.com, blerpong.j@ku.ac.th, cchiravoot.p@ku.ac.th Keywords: Cotton fabric waste, polypropylene, maleic anhydride, microcellulose Abstract.
As the result, the aim of this present work was to investigate on structures and properties of i-PP composites with the synthesized micro cellulose extracted from cotton fabric waste.
Hirotsu: Structure and properties of composites of highly crystalline cellulose with polypropylene:effects of polypropylene molecular weight.
Chabert: Physical chemistry of the interface in polypropylene/cellulosic-fibre composites.

Facile Electrospinning Preparation of Y3Al5O12 Nanobelts Fei Bia, Xiangting Dongb, Jinxian Wangc, Guixia Liud and Wensheng Yue Key Laboratory of Applied Chemistry and Nanotechnology at Universities of Jilin Province, Changchun University of Science and Technology, Changchun 130022, China abifei1224@163.com, bdongxiangting888@163.com, cwjx87@163.com, dliuguixia22@163.com, ewenshengyu2009@sina.com Keywords: Electrospinning, YAG, Nanobelts Abstract.
PVP/[Y(NO3)3+Al(NO3)3] composite nanobelts were fabricated via electrospinning combined with sol-gel process and novel structure of Y3Al5O12 (denoted as YAG for short) nanobelts have been obtained after calcination of the relevant composite nanobelts.
XRD analysis indicated that the composite nanobelts were amorphous, and YAG nanobelts were cubic in structure with space group Ia3d.
Yttrium Aluminum Garnet (Y3Al5O12, denoted as YAG for short) has a cubic structure with a garnet structure and is an important inorganic nonmetal material.
In this study, novel structures of YAG nanobelts have been fabricated via electrospinning.

The structures of carbazole derivatives was determined by means of 1H NMR and the film was characterized by fluorescence measurements, contact angle, X-ray photoelectron spectroscopy.
Materials Chemistry.

Eu3+ doping in the garnet structure usually emits a red narrow-band line spectrum and 450nm blue chip is difficult to excite[16].
Results and Discussion Phase identification and detailed crystal structure.
The garnet structure has three cationic sites, namely dodecahedral, octahedral and tetrahedral positions, as shown in Figure.2(a).
[8] Jumpei Ueda et al, Broadband Near-Infrared Persistent Luminescence of Ba[Mg2Al2N4] with Eu2+ and Tm3+ after Red Light Charging, Journal of Materials Chemistry C. 2013, 00, 1-3
Molokeev, et al, Crystal structure and luminescence properties of green-emitting Sr1-xAl12O19:xEu2+ phosphors, Ceram.

The surface morphologies of two adsorbents were relatively rough and had irregular porous structure mainly in mesoporous.
According to statistics[6-7], the zinc ion in ZnCl2 solution can come into the sludge pore, forming porous structure.
Adsorbents had a rough surface with irregular porous structure, large aperture and wide pore size distribution.
They had rough surface with irregular porous structure, large aperture, wide pore size distribution, mainly composed of mesoporous nature.
Pore structures and surface chemistry of adsorbents obtained by pyrolysis of sewage sludge derived fertilizer [J].

The bulk density of dry land is higher than that of forest land and grass land, which results in the physical properties and structure of forest land soil are better than those of non-forest land.
It is observed from the research that the average infiltration rate and steady infiltration rate, its order from high to low was forest land, grass land and dry land, which shows that the physical properties and structure of a forest soil are superior to that of non-forest land.
Thus this proves that the vegetation’s important role of improving soil structure [5, 6].
Conclusion 1) The bulk density of dry land is higher than that of forest land and grass land; The total soil porosities of forest land is higher than that of grass land and dry land, which shows that the physical properties and structure of forest land are better than those of non-forest land. 2) The average infiltration rate of the forest land is up to 1.32mm/min and the steady infiltration rate of forest land is up to 0.47mm/min, during the first 80min of soil water infiltration process.
Comparative assessment of water infiltration of soils under different tillage systems in eastern Botswana[J].Physics and Chemistry of the Earth, Parts A/B/C, Volume 34, Issues 4-5, 316-323(2009) [9] Carroll C, Merton L, Burger P.

Investigation of Preparation and Thermoelectric Properties of Ca2.5La0.5Co4O9 Porous Ceramics Pengxia JI1,2,4,a, Huimin ZHANG1,2,3,b, Aimin Chang1,2,3,c 1Key Laboratory of Functional Materials and Devices for Special Environments,CAS,Urumqi 830011,China 2Xinjiang Key Laboratory of Electronic Information Materials and Devices, Urumqi 830011,China 3Xinjiang Technical Institute of Physics and Chemistry,CAS,Urumqi 830011,China 4School of Physics Science and Technology,Xinjiang University,Urumqi,830046,China ajipengxia_a@sina.cn, bzhanghm@ms.xjb.ac.cn, cchangam@ms.xjb.ac.cn Keywords: Thermoelectric materials,Ca2.5La0.5Co4O9,Porosity,Thermoelectric properties Abstract.
CO(NH2)2 as pore-former used to prepare porous Ca2.5La0.5Co4O9 thermoelectric materials by solid-state reaction technique.Microstructure,density and thermoelectric properties (temperature dependence of electrical resistivity,Seebeck coefficient) of the samples were studied in details.The results have shown that the porosity increases and the pore structure is improved with the pore-former content increasing,and electrical resistivity and density decrease while Seebeck coefficient raise.The improvement in electrical resistivity and Seebeck coefficient leads to higher power factor values at 913 K (around 1.32 mW/cm·K2) than undoped samples.
Fig.1 shows the microstructure of the samples.It can be seen that porosity increases with the CO(NH2)2 content increasing,and pore size, shape an distribution are not even when the adding amount of CO(NH2)2 was not more than 4%,but then distribution and size and shape become even with more additon.This indicates the pore structure of Ca2.5La0.5Co4O9 can be improved by the use of CO(NH2)2.
The temperature dependence of electrical resistivity,as a function of CO(NH2)2 content,is shown in Fig.3(b).As the temperature rises, the electrical resistivity of all samples are significantly reduced and agree with semiconducting-like (dρ/dT≦0) behaviour.In these samples,electrical resistivity values decrease when the CO(NH2)2 content is increased until 4%,however,higher than the undoped samples.Further CO(NH2)2 addition decreases electrical resistivity keeping slightly lower than the undoped ones.Namely,using CO(NH2)2 as pore-former decomposes into gas during the sample formation,resulting in porous structure have little effect on electrical resistivity.In any case,the lowest measured electrical resistivity values at 903 K (9.21 mΩ·cm for the 6% CO(NH2)2 doped samples) is around the best values obtained for Ca2.5La0.5Co4O9 samples.
Fig. 2 TE properties of samples (a) Density (b) Electrical resistivity (c) Seebeck coefficient (d) Power factor(volume fraction) Conclusion This paper demonstrates that porous structure made by CO(NH2)2 as pore-former can enhance the thermoelectric performance of Ca2.5La0.5Co4O9.As the addition amount of CO(NH2)2 increases,the porosity increases and the pore structure is improved.The highest PF value is obtained for the 6% CO(NH2)2 doped samples at 913 K (around 1.32 mW/cm·K2) is significantly higher than the value of the undoped ones (around 1.77×10-2 mW/cm·K2).

The Synthesis and Characterization of the Graphene Oxide-Polyamine Composites using for the Recovery of Heavy Metal Ions Guozhen Wang1,a, Tao Chen1,b, Jie Gao2,c,Jing Yin2,d, Rui Ma1*,e, Chunjie Yan1,f 1 Engineering Research Center of Nano-Geomaterials of Ministry of Education, China University of Geosciences, Wuhan 430074，China 2 College of Chemistry, Central China Normal University, Wuhan 430079, China awangguozhen1987@163.com, b510961481@qq.com, cgaojie19870501@163.com d121962263@qq.com, emarui.cug@gmail.com, fchjyan2005@126.com Keywords: Graphene Oxide-Polyamine Recovery Heavy Metal Ions Abstract.
The chemical structure of obtained graphene oxide–polyamine composites was confirmed by FT-IR, XRD and SEM.
Characterization The structure of the GO and GO–polyamine composites were characterized by FT-IR, XRD, and SEM.FT-IR spectra were recorded in the range of 4000–400 cm−1 on a Nicolet AVATAR360 Instrument using the standard KBr disk method.
The structure of GO and GO–polyamine composites were confirmed by FTIR.
The chemical structure and the morphologies were characterized by FTIR, XRD, and SEM.

Photo-oxidative Degradation of Metallocene Linear Low-density Polyethylene Fuchen BAI1 , Chunxiao ZHANG 2 , Xiyao ZHANG 2 , Jian LIU 2 , Wei TIAN3 1 Changchun Institute of Applied Chemistry, Chinese Academy of Sciences，Changchun 2 Institute of Materials Science,Jilin University,Changchun 3 School of Chemical Engineering ,ChangChun University Of Technology Keywords: Metallocene linear low-density polyethylene, Photo-oxidative degradation Abstract.
The investigations were focused on the changes of the physical and chemical structures and elongation at break occurring in the photo-oxidation process.
Introduction Many researchers have been researching on the application and theory of the metallocene polyethylene because of its unique structure and the excellent application performance.But few reports about the degradation and stability of metallocene linear low-density polyethylene （m-LLDPE）have been found[1-4] .In this paper, we have studied the photo-oxidative degradation property of the M-LLDPE and the traditional linear low density polyethylene (LLDPE), and also have compared the photo-oxidative stability of different branched-chain structure of the m-LLDPE,which provide the basis of stability of the metallocene linear polyethylene under the photo-oxidation conditions and offer the foundation of the subsequent research on the weatherable metallocene linear polyethylene products.
Take the sample periodically for performance tests.The changes of chemical structure were measured by the Fourier Infrared Spectrometer.The oxidation degree，characterized by the carbonyl index，is determined by the following equation: CI=A1717 cm -1/d (1) in which d stands for the thickness of the film(cm).