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Online since: November 2013
Authors: Ji Huan He, Hong Yan Liu, Hao Dou
Different from the bead-on-string structure, droplet-like beads grow beside nanofibers randomly (shown in Fig.5) as if droplets could not completely wet solid fibers.
The formation reason for this structure may owe to two aspects.
This novel method exhibits the ability and superior property to the fabrication of multilevel structured nanofibers.
Further studies are still required to well control the orientation, arrangement, size and other structure of nanofibers so that tremendous fascinating devices and applications would be achieved in more fields.
Electrospinning of multilevel structured functional micro-/nanofibers and their applications, Journal of Materials Chemistry A,1(2013), 7290-7305 [6] D.
The formation reason for this structure may owe to two aspects.
This novel method exhibits the ability and superior property to the fabrication of multilevel structured nanofibers.
Further studies are still required to well control the orientation, arrangement, size and other structure of nanofibers so that tremendous fascinating devices and applications would be achieved in more fields.
Electrospinning of multilevel structured functional micro-/nanofibers and their applications, Journal of Materials Chemistry A,1(2013), 7290-7305 [6] D.
Online since: February 2014
Authors: Is Fatimah, N. Nunani Yuyun
ZnO-SiO2/Laponite Photocatalyst: Kinetic Study on Photocatalytic Decolorization of Methylene Blue
Is Fatimah, Yuyun Nunani N
Chemistry Dept., Islamic University of Indonesia, KampusTerpaduUII.Jl.
With its easy and simple prepared porous structure to enhance photoactivity and homogeneous distribution of ZnO, preparation of ZnO-SiO2 are intensely studied [4-8].
Furthermore, for environmental photocatalytic application, highly surface area and porous structure of material are required properties.
This is due to main structure of laponite which is consist of tetrahedral silica and octahedral magnesia.
By adsorption treatment, the kinetic curve of MB decolorization was increased related to the role of porous structure of materials.
With its easy and simple prepared porous structure to enhance photoactivity and homogeneous distribution of ZnO, preparation of ZnO-SiO2 are intensely studied [4-8].
Furthermore, for environmental photocatalytic application, highly surface area and porous structure of material are required properties.
This is due to main structure of laponite which is consist of tetrahedral silica and octahedral magnesia.
By adsorption treatment, the kinetic curve of MB decolorization was increased related to the role of porous structure of materials.
Online since: March 2015
Authors: Shen Zhou Lu, Shan Shan Zhang, Xin Yue Zhang, Jiao Jiao Li
The structure and mechanical properties of blend films were characterized.
Structure of blend films.
Results and Discussion Structure of SF/PYR blend films.
Structure and mechanical properties as well as optical property and biocompatibility were measured.
Migliaresi, Regenerated silk fibroin films: thermal and dynamic mechanical analysis,Macromolecular Chemistry and Physics. 203 (2002)1658-1665
Structure of blend films.
Results and Discussion Structure of SF/PYR blend films.
Structure and mechanical properties as well as optical property and biocompatibility were measured.
Migliaresi, Regenerated silk fibroin films: thermal and dynamic mechanical analysis,Macromolecular Chemistry and Physics. 203 (2002)1658-1665
Online since: December 2011
Authors: Hao Shen, Kan Cheng Mai, Dong Liang
Safety Engineering Research Center, school of Engineering, Sun Yat-sen University, Guangzhou 510006, China
2.College of Chemistry and Chemical Engineering, Zhongshan (Sun Yat-sen) University, Guangzhou,510275, China
3.
SEM analysis revealed the formation of an encapsulation structure in PP/compatibilizer/MH composites.
The interfacial tension (γAB) and wetting coefficient (ωα) results also confirmed the formation of encapsulation structure in these ternary composites.
This suggested that introduction of EVA-g-MA results in more encapsulation structure in ternary composites, due to its higher polarity.
The encapsulation structure was obtained in ternary composites modified by polyolefin-g-MA.
SEM analysis revealed the formation of an encapsulation structure in PP/compatibilizer/MH composites.
The interfacial tension (γAB) and wetting coefficient (ωα) results also confirmed the formation of encapsulation structure in these ternary composites.
This suggested that introduction of EVA-g-MA results in more encapsulation structure in ternary composites, due to its higher polarity.
The encapsulation structure was obtained in ternary composites modified by polyolefin-g-MA.
Online since: September 2011
Authors: You Ning Chen, Jun Cai Zhang
Study on the Synthesis and Characterization
of polylactic acid /Maleic anhydride copolymer
Chen Youninga, Zhang Juncaib
(College of Chemistry and Chemical Engineering, Xianyang Normal College, Xianyang City, Shannxi Province, China 712000)
acyn536303@163.com, bxyjuncai@163.com
Keywords: Malaya Acid Anhydrid; hydroxyl terminated lactic acid prepolymer; biodegradable polymer; direct melt polycondensation
Abstract: Hydroxyl terminated lactic acid prepolymer was synthesized with poly ethylene glycol (PEG).The malaya acid anhydride modified PLA by fuse polymerization, and the different technological conditions (temperature, reaction time and so on) were discussed by the orthogonal design approach.
The molecular structure change has been reflected in the MPLA spectrum.
(2) DSC results show that the glass transition temperature of the modified product has increased, which indicated that the molecular weight of copolymer has increased; IR test results show that the structure of products has undergone significant change, structural change will cause changes in performance, which indicated that maleic anhydride modified poly-lactic acid has great research value
Chemistry and Adhesion, 2008,30 (5): 35 ~ 37
The molecular structure change has been reflected in the MPLA spectrum.
(2) DSC results show that the glass transition temperature of the modified product has increased, which indicated that the molecular weight of copolymer has increased; IR test results show that the structure of products has undergone significant change, structural change will cause changes in performance, which indicated that maleic anhydride modified poly-lactic acid has great research value
Chemistry and Adhesion, 2008,30 (5): 35 ~ 37
Online since: April 2020
Authors: Ilmi Fadhilah Rizki, Ellya Sinurat, Sofa Fajriah, Endang Saefudin
Antioxidant Activity of Sulfated Polysaccharide Extract from Green Seaweed (Caulerpa lentillifera) Makassar, Indonesia
Ilmi Fadhilah Rizki1,a, Ellya Sinurat2,b, Sofa Fajriah3,c and Endang Saefudin1,d*
1Department of Chemistry, Faculty of Mathematics and Natural Science, Universitas Indonesia, Indonesia
2Research and Development Center for Marine and Fisheries Product Processing and Biotechnology, Ministry of Marine and Fisheries, Indonesia
3Research Center for Chemistry, Indonesian Institute of Sciences, Indonesia
ailmi.fadhilah@sci.ui.ac.id, bellya_sinurat@yahoo.com, csofafajriah@gmail.com, d*endang.saefudin@sci.ui.ac.id
Keywords: Caulerpa lentillifera, antioxidant activity, sulfated polysaccharide
Abstract.
FT-IR (Fourier Transform Infrared Spectroscopy) in solid KBr was used to determine the structure of the functional group on the C. lentillifera extract.
Yao, Sulfated modification, characterization and structure-antioxidant relationships of Artemisia sphaerocephala polysaccharides, Carbohydr.
FT-IR (Fourier Transform Infrared Spectroscopy) in solid KBr was used to determine the structure of the functional group on the C. lentillifera extract.
Yao, Sulfated modification, characterization and structure-antioxidant relationships of Artemisia sphaerocephala polysaccharides, Carbohydr.
Online since: August 2013
Authors: Chen Yi Shen, Xiao Qin Wei, Shi Wei He, Mi Cong Jin, Mei Qiang Cai
Determination of Trace PCBs in Water by GC-MS with Ionic Liquid Based Headspace Single-Drop Microextraction under Ultrasound
Shi-wei He1, a, Chen-yi Shen2, b, Xiao-qin Wei2, c, Mi-cong Jin3, d
and Mei-qiang Cai2, e
1Department of Chemistry, Xixi Campus, Zhejiang University, Hangzhou, 310028, China
2Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou 310035, China
3Ningbo Key Laboratory of Poison Research and Control, Ningbo Municipal Center for Disease Control and Prevention, Ningbo 315010, China
a email: heshiwei@zjinfo.gov.cn, b email: shenchenyitxl@163.com, (Corresponding author)
c email: weixq1989@163.com, d email: jmcjc@163.com, e email: meiqiangcai@gmail.com
Keywords: GC-MS; Ionic liquid; headspace; ultrasound
Abstract.
At present, the research of replacing the organic solvents, including the combination of ionic liquid and liquid phase microextraction has become a hot in the application of analytical chemistry.
The structure of the ionic liquid was showed in Fig.1.
Fig. 1 The structure of the ionic liquid Chromatography and mass spectrometry conditions.
At present, the research of replacing the organic solvents, including the combination of ionic liquid and liquid phase microextraction has become a hot in the application of analytical chemistry.
The structure of the ionic liquid was showed in Fig.1.
Fig. 1 The structure of the ionic liquid Chromatography and mass spectrometry conditions.
Online since: January 2017
Authors: Chu Wu, Xiang Ying Hao, Wen Jing Cheng, Guan Hua Shen, Qu Yun Deng, Hao Ping Wu, Hui Ning Li, Yan Hua Zhao
Application of Mg-Al Layered Double Hydroxides Composite Fillers in the Water-Based Heat Insulation Coating
Yan-hua Zhao1,2,a,Guan-hua Shen1,2,b, Qu-yun Deng2,c, Chu Wu2,d,
Hao-ping Wu2,e, Wen-jing Cheng2,f, Hui-ning Li3,g and Xiang-ying Hao1,2,h*
1College of Chemistry and Environmental Science, Inner Mongolia Normal University, Hohhot, China
2College of chemistry and chemical engineering, ZhaoQing University, Zhaoqing, China
3Zhaoqing Rivers High-Tech Materials Co.
Mg-Al layered double hydroxides (LDH) has the layered structure, small specific gravity, low thermal conductivity, which the structure and physical constants meet the requirements of barrier type heat insulation coatings [5].
Mg-Al layered double hydroxides (LDH) has the layered structure, small specific gravity, low thermal conductivity, which the structure and physical constants meet the requirements of barrier type heat insulation coatings [5].
Online since: April 2021
Authors: Vladimir A. Gol'tsev, Boris P. Yur'ev, Vyacheslav A. Dudko
Concentrate with the following chemistry, %: 46,5 Fe; 1,62 FeO; 9,07 SiO2 - was produced through high gradient magnetic separation: concentrate yield comprised 60 %, iron recovery into concentrate - 73 %.
According to X-ray structure analysis the iron bearing sample material consists of invalid hematite and magnetite.
It was established that the magnetic concentrate of wet magnetic separation according to X-ray crystallography consists of magnetite and hematite with faulted crystal lattice structure.
Chemerinsky, Coal Defrosting Using Microwave Energy, Coke and Chemistry 5 (2014) 40–43
According to X-ray structure analysis the iron bearing sample material consists of invalid hematite and magnetite.
It was established that the magnetic concentrate of wet magnetic separation according to X-ray crystallography consists of magnetite and hematite with faulted crystal lattice structure.
Chemerinsky, Coal Defrosting Using Microwave Energy, Coke and Chemistry 5 (2014) 40–43
Online since: July 2012
Authors: Shao Yi Wu, Yue Xia Hu, Min Quan Kuang, Bo Tao Song
However, the contributions from the ligand orbital and spin-orbit coupling interactions and the low symmetrical (tetragonal) distortion were not taken into account, failing to correlate the local structure (low symmetrical distortion) and the impurity-ligand orbital admixtures with the analyses of the g factors.
The above expressions reveal that the g factors (especially the anisotropy Dg = g^- g//) are correlated to the tetragonal field parameters and hence to the local structure of the system.
McGarvey: Journal of Physical Chemistry, 71 (1967) 51 [13] R.S.
Weast: CRC Handbook of Chemistry and Physics (CRC Press, Boca Raton 1989), p.B196 [20] E.
The above expressions reveal that the g factors (especially the anisotropy Dg = g^- g//) are correlated to the tetragonal field parameters and hence to the local structure of the system.
McGarvey: Journal of Physical Chemistry, 71 (1967) 51 [13] R.S.
Weast: CRC Handbook of Chemistry and Physics (CRC Press, Boca Raton 1989), p.B196 [20] E.