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Online since: February 2013
Authors: Zhe Wang, Yan Qing Niu, Xiao Xuan Wang, Jing Zhou, Zhong Su Ma
Gelatin (Analytical Pure) purchased from Beijing ZhenHai istitute of applied chemistry.
When it reached a limitation, the surface of the films turned into grease, and the structure became poor.
CMC-Na mass fraction increased, the hydrogen bond and the hydrophobic interactions between CMC-Na and fiber improved the stability of film structure, then, TS increased.
Structure and properties of carboxymethyl cellulose/soy protein isolate blend edible films crosslinked by Maillard reactions[J].
Food Chemistry, 2009, 115(2): 462-468
When it reached a limitation, the surface of the films turned into grease, and the structure became poor.
CMC-Na mass fraction increased, the hydrogen bond and the hydrophobic interactions between CMC-Na and fiber improved the stability of film structure, then, TS increased.
Structure and properties of carboxymethyl cellulose/soy protein isolate blend edible films crosslinked by Maillard reactions[J].
Food Chemistry, 2009, 115(2): 462-468
Online since: August 2023
Authors: Sang Woo Lim, Tae Hyeon Kim, Yu Seok Lee, Jong Won Han
Thus, severe precipitation of H2SiO3 resulting the oxide regrowth is suggested to be more prone to occur at high-number Si3N4/SiO2 multi-stack structure compared to low-number stack structure.
In particular, even at the same n-th layer from the top of the structure, the higher H2SiO3 concentration was obtained as the number of Si3N4/SiO2 multi-stack structure increased.
Secondly, the H2SiO3 concentration change with respect to the distance from the top of the structure (∂C/∂x) at the bottom end of the structure is small enough to be neglected.
Lim, Oxide regrowth mechanism during silicon nitride etching in vertical 3D NAND structures, Microelectron.
Lim, Understanding of Si3N4-H3PO4 reaction chemistry for the control of Si3N4 dissolution kinetics, J.
In particular, even at the same n-th layer from the top of the structure, the higher H2SiO3 concentration was obtained as the number of Si3N4/SiO2 multi-stack structure increased.
Secondly, the H2SiO3 concentration change with respect to the distance from the top of the structure (∂C/∂x) at the bottom end of the structure is small enough to be neglected.
Lim, Oxide regrowth mechanism during silicon nitride etching in vertical 3D NAND structures, Microelectron.
Lim, Understanding of Si3N4-H3PO4 reaction chemistry for the control of Si3N4 dissolution kinetics, J.
Online since: June 2015
Authors: Mohd Sobri Idris, T.Q. Tan, Rozana Aina Maulat Osman
The layered LiNi1/3Mn1/3Co1/3O2 that formed with the α-NaFeO2 structure were synthesised by conventional solid state method.
The sample prepared has a layered structure with 2.862(2) Å and 14.227(8) Å as its lattice parameters a and c, respectively.
They are single phase with layered rock salt structure derived from α-NaFeO2.
Makimura, Layered lithium insertion material of LiCo1/3Ni1/3Mn1/3O2 for lithium-ion batteries, Chemistry Letters 30 (2001) 642-643
Dreele, General Structure Analysis System (GSAS), Los Alamos National Laboratory Report LAUR (1994) 86-748
The sample prepared has a layered structure with 2.862(2) Å and 14.227(8) Å as its lattice parameters a and c, respectively.
They are single phase with layered rock salt structure derived from α-NaFeO2.
Makimura, Layered lithium insertion material of LiCo1/3Ni1/3Mn1/3O2 for lithium-ion batteries, Chemistry Letters 30 (2001) 642-643
Dreele, General Structure Analysis System (GSAS), Los Alamos National Laboratory Report LAUR (1994) 86-748
Online since: August 2012
Authors: Meiry Glaúcia Freire Rodrigues, Fabricio Machado, Mariaugusta Ferreira Mota
Influence of Exchanged Surfactant on the Structure and Adsorption Properties of Brazilian Green Mud Clay
Mariaugusta Ferreira Mota1a, Fabricio Machado2b, Meiry Gláucia Freire Rodrigues1c
1Federal University of Campina Grande, Academic Unit of Chemical Engineering, Laboratório de Desenvolvimento de Novos Materiais
Aprígio Veloso 882, Bloco CM, Campina Grande - PB, CEP: 58429-970,
Phone: 55 83 2101-14885, Brazil
2Instituto de Química - Universidade de Brasília Campus Universitário Darcy Ribeiro - CP 04478 Brasília - 70910-900 DF - Brasil
amariaugusta.f@gmail.com, bfmachado@unb.br, cmeiry@deq.ufcg.edu.br
Keywords: Green mud clays; organophilic clay; surfactant, Praepagen, Dodigen
Abstract.
The IR results showed that salts were successfully incorporated to natural clay structure.
Infrared spectra exhibited new bands of CH2 and CH3 vibrations, which correspond to the presence of the ammonium salts inside the clay structure.
Domka: J. of Physics and Chemistry of Solids Vol. 65 (2004) p. 441
The IR results showed that salts were successfully incorporated to natural clay structure.
Infrared spectra exhibited new bands of CH2 and CH3 vibrations, which correspond to the presence of the ammonium salts inside the clay structure.
Domka: J. of Physics and Chemistry of Solids Vol. 65 (2004) p. 441
Online since: May 2016
Authors: Usanee Malee, Sakdiphon Thiansem
Analytical Study of Ancient Pottery from the Archaeological Site of Ban Bo Suak from Nan Province, Thailand
Usanee Malee1,2,a* and Sakdiphon Thiansem3,b
1Department of Physics and Materials Science, Faculty of Science, Chiang Mai
University, Chiang Mai 50200, Thailand.
2Science and Technology, Chiang Mai Rajabhat University, Chiang Mai 50200, Thailand.
3Department of Industrial Chemistry, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand.
The samples JQA.SH1, FQB.SH3, PQC.SH5 and NQD.SH7, showed that phase structure were quartz, tridymite and mullite phase.
The samples JQA.SH1, FQB.SH3, PQC.SH5 and NQD.SH7, found that phase structure was quartz, tridymite and mullite phase (Figure 5).
XRD found that phase structure was quartz, tridymite and mullite.
The samples JQA.SH1, FQB.SH3, PQC.SH5 and NQD.SH7, showed that phase structure were quartz, tridymite and mullite phase.
The samples JQA.SH1, FQB.SH3, PQC.SH5 and NQD.SH7, found that phase structure was quartz, tridymite and mullite phase (Figure 5).
XRD found that phase structure was quartz, tridymite and mullite.
Online since: January 2010
Authors: Jun Gang Gao, Cai Yun Zhang, Li Huo, Yuan Yuan Zhang
Synthesis of liquid crystalline epoxy resin p-BDEPB and cure kinetics
with 3-MeTHPA
Jungang Gaoa, Caiyun Zhangb, Li Huoc, Yuanyuan Zhangd
1
College of Chemistry and Environmental Science, Hebei University, Baoding 071002, China
a
gaojg@hbu.edu.cn, bbeijixing2012@163.com, chuolichenchen@sina.com,
d
hanxin_1101@163.com
Keywords: Liquid crystalline; Epoxy resin; 4,4-dihydroxybiphenyl; Cure Kinetics
Abstract.
Its structure and liquid crystalline behavior were characterized by DSC, 1H-NMR, FTIR, POM and XRD.
Synthesis and Characterization The p-BDEPB was synthesized according literature [4,5], the molecular structure is listed as follows: This molecular structure was characterizated by Fourier transform infrared (FTIR FTS-40, Bio-Rad, US) and nuclear magnetic resonance spectrometer (NMR, bruker 400M, Switzerland) using CDCl3 as solvent; the texture of p-BDEPB was examined by means of polarizing optical microscopy (POM, 59XA, Yong-Heng, Shanghai, China) and X-ray diffractometer (XRD, Rigaku-D/max-2500, Germany).
Results and discussion Characterization of structure and texture The FTIR spectrum of p-BDEPB shows that the epoxide group absorption peak is at 913cm-1; the carbonyl absorption peak is at 1728cm-1; the ether absorption peak is at 1258cm-1; the phenyl absorption peak is at 1605cm-1.
The 1H NMR spectrum of p-BDEPB shows: 1H-NMR (CDCl3,ppm): 2.81-2.97 (m,4H, O-CH2-CH), 3.14 (m,2H, CH-CH2), 3.96-4.40 (m,4H,2 -O-CH2-), 7.02-8.20 (m,16H, Ar-H) According to the results of FTIR and 1H NMR, the structure of the product is conformed with the aim compound.
Its structure and liquid crystalline behavior were characterized by DSC, 1H-NMR, FTIR, POM and XRD.
Synthesis and Characterization The p-BDEPB was synthesized according literature [4,5], the molecular structure is listed as follows: This molecular structure was characterizated by Fourier transform infrared (FTIR FTS-40, Bio-Rad, US) and nuclear magnetic resonance spectrometer (NMR, bruker 400M, Switzerland) using CDCl3 as solvent; the texture of p-BDEPB was examined by means of polarizing optical microscopy (POM, 59XA, Yong-Heng, Shanghai, China) and X-ray diffractometer (XRD, Rigaku-D/max-2500, Germany).
Results and discussion Characterization of structure and texture The FTIR spectrum of p-BDEPB shows that the epoxide group absorption peak is at 913cm-1; the carbonyl absorption peak is at 1728cm-1; the ether absorption peak is at 1258cm-1; the phenyl absorption peak is at 1605cm-1.
The 1H NMR spectrum of p-BDEPB shows: 1H-NMR (CDCl3,ppm): 2.81-2.97 (m,4H, O-CH2-CH), 3.14 (m,2H, CH-CH2), 3.96-4.40 (m,4H,2 -O-CH2-), 7.02-8.20 (m,16H, Ar-H) According to the results of FTIR and 1H NMR, the structure of the product is conformed with the aim compound.
Online since: August 2014
Authors: Xian Ling Deng, You Jun Huang, Ze Lun Li
Designed a type of lift coating machine including its structure, hardware system and software system.
It is no exaggeration to say that it has become an emerging interdisciplinary subject, which not only involves some fundamental subjects such as physics, chemistry, mathematics and so on but also has close relationship with some technologies such as material science, plasma, vacuum science and surveying, control etc [1,2].
Its disadvantages are small adhesion, bad process repeatability and uneasy access to the thin film with the crystalline structure.
Mechanical structure design The hardware structure of the lift coating machine is shown in Figure 1, it achieves the rise and fall of lift coating machine by using gear and rack, which is also a typical transmission mechanism, mostly used for lifting and a kind of mechanism with strong bearing capacity, relatively high driving accuracy and large-range transmission speed.
The hardware structure of lift coating machine Dip coater uses the direct current speed reduction motor and in the design of lift coating machine, we can find that its speed is unfavorably too high, with run load relatively large, stability required during the running time and without heavy vibration.
It is no exaggeration to say that it has become an emerging interdisciplinary subject, which not only involves some fundamental subjects such as physics, chemistry, mathematics and so on but also has close relationship with some technologies such as material science, plasma, vacuum science and surveying, control etc [1,2].
Its disadvantages are small adhesion, bad process repeatability and uneasy access to the thin film with the crystalline structure.
Mechanical structure design The hardware structure of the lift coating machine is shown in Figure 1, it achieves the rise and fall of lift coating machine by using gear and rack, which is also a typical transmission mechanism, mostly used for lifting and a kind of mechanism with strong bearing capacity, relatively high driving accuracy and large-range transmission speed.
The hardware structure of lift coating machine Dip coater uses the direct current speed reduction motor and in the design of lift coating machine, we can find that its speed is unfavorably too high, with run load relatively large, stability required during the running time and without heavy vibration.
Online since: February 2012
Authors: Jin Ming Long, Zhong Cheng Guo, Xiao Yun Zhu, Zhu Zhang
The results show that the Triton X-100 plays an important role in improving the coating qualities and promoting the densification of crystalline structure.
Furthermore, a markedly fine-grained structure and more smooth surface of the tin coating could be obtained from the bath 5 containing TX100, additive A and additive B, simultaneously (Fig.1d).
with the standard data of the tin powder diffraction(PDF card No.04-0673), it can be known that there are some varied preferred orientation in crystal structure of four tin coatings deposited from bath 2~5.
The three additives affect the structures and morphology of tin coatings via a synergistic adsorption and inhibition effect during electrocrystallization
Peraldo: Materials Chemistry and Physics Vol.62 (2000), p.158 [9] V.M.
Furthermore, a markedly fine-grained structure and more smooth surface of the tin coating could be obtained from the bath 5 containing TX100, additive A and additive B, simultaneously (Fig.1d).
with the standard data of the tin powder diffraction(PDF card No.04-0673), it can be known that there are some varied preferred orientation in crystal structure of four tin coatings deposited from bath 2~5.
The three additives affect the structures and morphology of tin coatings via a synergistic adsorption and inhibition effect during electrocrystallization
Peraldo: Materials Chemistry and Physics Vol.62 (2000), p.158 [9] V.M.
Online since: May 2011
Authors: Wei Yun Guo, Huan Xin Gao, Qing Ling Chen, Xue Feng Li
SZ-HMS kept the typical mesoporous crystalline as well as pore structure and exhibited an excellent catalytic performance for the epoxidation of soybean oil.
The diffraction peaks in XRD and the inflection point at P/P0 =0.3~0.5 in the N2 adsorption isotherms shown in Fig. 3 indicated that SZ-HMS still possessed a typical hexagonal mesoporous structure after treating HMS with ZrOCl2 and H2SO4 [10].
The N2-adsorption isotherms and the data for pore structure are displayed in Fig. 3 and Tab. 1, respectively.
It is because that the calcination at 823 K can prevent the HMS mesoporous structure from destroying at high temperature at 923 K.
SZ-HMS kept the typical mesoporous crystalline and pore structure and exhibited excellent catalytic performance in the epoxidation of soybean oil.
The diffraction peaks in XRD and the inflection point at P/P0 =0.3~0.5 in the N2 adsorption isotherms shown in Fig. 3 indicated that SZ-HMS still possessed a typical hexagonal mesoporous structure after treating HMS with ZrOCl2 and H2SO4 [10].
The N2-adsorption isotherms and the data for pore structure are displayed in Fig. 3 and Tab. 1, respectively.
It is because that the calcination at 823 K can prevent the HMS mesoporous structure from destroying at high temperature at 923 K.
SZ-HMS kept the typical mesoporous crystalline and pore structure and exhibited excellent catalytic performance in the epoxidation of soybean oil.
Online since: April 2014
Authors: Xin Jin, Wen Hong Tao, Xing Hua Fu, Yang Lu Hou
The sintering experiment was carried out at the temperature range of 980℃-1130℃, and perovskite phase structure could be observed apparently below 1080℃.
However, due to K and Na volatilize seriously up to 900 degree, KNN ceramics sintered by traditional technology was so likely to deviate the chemistry stoichiometry that make it hard to obtain densification structure[3].
The phase structure of the resultant powders was identified by powder X-ray diffraction (XRD; Bruker DX-2500, Germany) .
Phase structure and micrograph.
For fig.1(b), a large amount of uniform cubical structure with an average size of 2-3μm and a small amount of particles which adhered to the cubical grains can be observed.
However, due to K and Na volatilize seriously up to 900 degree, KNN ceramics sintered by traditional technology was so likely to deviate the chemistry stoichiometry that make it hard to obtain densification structure[3].
The phase structure of the resultant powders was identified by powder X-ray diffraction (XRD; Bruker DX-2500, Germany) .
Phase structure and micrograph.
For fig.1(b), a large amount of uniform cubical structure with an average size of 2-3μm and a small amount of particles which adhered to the cubical grains can be observed.