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Online since: October 2006
Authors: Sami Areva, Thomas Kronberg, Leena Hupa, Linda Fröberg, Minna Piispanen
Corrosion of Glazes Coated with Functional Films
in Detergent Solutions
Minna Piispanen1*,a , Linda Fröberg1*,b , Thomas Kronberg
2,c Sami Areva
3,d
and Leena Hupa
1,e
1 Åbo Akademi University, Process Chemistry Centre, Biskopsgatan 8, 20500 Turku/Åbo, Finland
2
Ido Bathroom Ltd, Sanitec Group, 10600 Ekenäs, Finland
3 Turku Biomaterials Centre, Itäinen Pitkäkatu 4 B, 20520 Turku, Finland
*Graduate School of Materials Research, Turku, Finland
a
minna.piispanen@abo.fi, blinda.froberg@abo.fi,
cthomas.kronberg@idobathroom.com,
d
sami.areva@utu.fi,
e
leena.hupa@abo.fi
Keywords: Glaze, functional film, fluoropolymer, titania, zirconia, corrosion
Abstract.
The influence of fluoropolymer on the surface structure is shown by the SEM images in Fig. 2 for a non-coated mat commercial glaze and the same glaze coated with the fluoropolymer film.
This work has been part of activities of the Åbo Akademi Process Chemistry Centre funded by the Academy of Finland in their Centres of Excellence Programme.
The influence of fluoropolymer on the surface structure is shown by the SEM images in Fig. 2 for a non-coated mat commercial glaze and the same glaze coated with the fluoropolymer film.
This work has been part of activities of the Åbo Akademi Process Chemistry Centre funded by the Academy of Finland in their Centres of Excellence Programme.
Online since: November 2012
Authors: Julienne Charlier, Federico Grisotto, Achraf Ghorbal, Cédric Goyer, Serge Palacin
It finds applications in various fields including biocompatibility, protection against corrosion, lubrication, soldering, functionalization, adhesion, and template chemistry.
We will first focus more particularly to the chemical structure of the localized electrografted film obtained by using the direct SECM mode configuration (i.e. the tip is used as the counter-electrode of the substrate to be transformed), and then we will investigate the influence of the electrolysis duration on the size and shape of the patterns.
Oturan, Electro-Fenton Process and Related Electrochemical Technologies Based on Fenton’s Reaction Chemistry, Chem.
We will first focus more particularly to the chemical structure of the localized electrografted film obtained by using the direct SECM mode configuration (i.e. the tip is used as the counter-electrode of the substrate to be transformed), and then we will investigate the influence of the electrolysis duration on the size and shape of the patterns.
Oturan, Electro-Fenton Process and Related Electrochemical Technologies Based on Fenton’s Reaction Chemistry, Chem.
Online since: December 2016
Authors: Bao Hui Li, Xiao Yan Li, Xiao Dan Yang
And separation of chiral pharmaceuticals has become a significant part in the field of pharmaceutical chemistry exploitation.
CDs have the truncated cone shape structure, in which the primary alcohols at the primary rim are exposed and accessible to modification, while the secondary alcohols at the secondary rim are chemically inert.
In Lim, Non-Natural Amino Acids for Protein Engineering and New Protein Chemistries, J.
CDs have the truncated cone shape structure, in which the primary alcohols at the primary rim are exposed and accessible to modification, while the secondary alcohols at the secondary rim are chemically inert.
In Lim, Non-Natural Amino Acids for Protein Engineering and New Protein Chemistries, J.
Online since: December 2012
Authors: Yan Jun Liu, Yong Chao Zheng
This cement was used as structure materials in engineering practices in China in 1990s.
0 ABC-20-QXRD 2.04 1.00 84.3 3.91 0.57 1.65 6.21 0 ABC-Bogue’s formula 61.74 23.49 9.08 2.90 PC-Bogue’s formula 23.53 53.39 9.30 8.18 Table 4 Fineness of Active Belite Cement Cement Type Passing 45mm Passing 80mm ABC 84% 96% Table 5 Physical and Mechanical Properties of Active Belite Cement Cement Type Water demand Setting time(h:min) W/C Flowability (mm) Flexural Strength(MPa) Compressive Strength(MPa) initial final 3d 7d 28d 3d 7d 28d ABC-10 0.25 2:57 6:10 0.5 160 1.54 2.5 8.5 5.9 11.8 71.4 ABC-20 0.26 3:15 7:15 0.5 180 1.03 3.1 7.9 6.6 12.5 70.2 PC 0.24 1:57 2:51 0.5 135 5.90 7.2 9.1 29.0 43.3 60.1 Fig.1 Chart of Active Belite Cement Particle Distribution Fig.2 TGA-SDC spectrum in the process of rising temperature Fig.3 TGA-SDC Spectrum in the Process of Decreasing Temperature Fig.4 QXRD Spectrum of Active Belite Cement Clinker/ABC-10 Fig.5 QXRD Spectrum of Active Belite Cement Clinker/ABC-20 Fig.6 Clinker Configuration from SEM Reference [1] Cement Chemistry
Advanced Materials Research Vols. 368-373 (2012) pp 478-484 [3] Lea’s Chemistry of Cement and Concrete, 4th edition, Peter C.
0 ABC-20-QXRD 2.04 1.00 84.3 3.91 0.57 1.65 6.21 0 ABC-Bogue’s formula 61.74 23.49 9.08 2.90 PC-Bogue’s formula 23.53 53.39 9.30 8.18 Table 4 Fineness of Active Belite Cement Cement Type Passing 45mm Passing 80mm ABC 84% 96% Table 5 Physical and Mechanical Properties of Active Belite Cement Cement Type Water demand Setting time(h:min) W/C Flowability (mm) Flexural Strength(MPa) Compressive Strength(MPa) initial final 3d 7d 28d 3d 7d 28d ABC-10 0.25 2:57 6:10 0.5 160 1.54 2.5 8.5 5.9 11.8 71.4 ABC-20 0.26 3:15 7:15 0.5 180 1.03 3.1 7.9 6.6 12.5 70.2 PC 0.24 1:57 2:51 0.5 135 5.90 7.2 9.1 29.0 43.3 60.1 Fig.1 Chart of Active Belite Cement Particle Distribution Fig.2 TGA-SDC spectrum in the process of rising temperature Fig.3 TGA-SDC Spectrum in the Process of Decreasing Temperature Fig.4 QXRD Spectrum of Active Belite Cement Clinker/ABC-10 Fig.5 QXRD Spectrum of Active Belite Cement Clinker/ABC-20 Fig.6 Clinker Configuration from SEM Reference [1] Cement Chemistry
Advanced Materials Research Vols. 368-373 (2012) pp 478-484 [3] Lea’s Chemistry of Cement and Concrete, 4th edition, Peter C.
Online since: July 2006
Authors: Simon P. Ringer, A. Dupasquier, M.M. Iglesias, Rafael Ferragut, R.K.W. Marceau
We have used a combination of
complementary experimental techniques: a) PALS, which gives information on the precipitation
kinetics via the observation of the evolving density and distribution of vacancy-solute complexes
[4]; b) CDB spectroscopy of the positron annihilation radiation, which gives information on the
chemistry of the environment in contact with vacancies [4] and c) APT, which enables
reconstruction of the three-dimensional spatial distribution of solute atoms.
Given that we were unable to detect zone-like precipitate structures and that we do find statistically significant dispersions of clusters during ageing, we attribute the change in hardness to these clustering reactions.
Amongst several key questions that remain is the question of the relative significance of cluster chemistry (like-atoms versus mixed) and their relative number density and we are currently exploring these.
Given that we were unable to detect zone-like precipitate structures and that we do find statistically significant dispersions of clusters during ageing, we attribute the change in hardness to these clustering reactions.
Amongst several key questions that remain is the question of the relative significance of cluster chemistry (like-atoms versus mixed) and their relative number density and we are currently exploring these.
Online since: March 2014
Authors: Carlos Eduardo Marmorato Gomes, Gladis Camarini
All SEM obervations were realized at the Institute of Physics of São Carlos and in the Institute of Chemistry of São Carlos, University of São Paulo.
- In microscopy (MEV) it was possible identify different phases on MOS cement being the principal structure like sheets and secondary phase like plates where it was also possible to identify major amount of sulfur.
The authors are grateful to Institute of Chemistry of São Carlos and Magnesita Refratários SA for SEM observations.
- In microscopy (MEV) it was possible identify different phases on MOS cement being the principal structure like sheets and secondary phase like plates where it was also possible to identify major amount of sulfur.
The authors are grateful to Institute of Chemistry of São Carlos and Magnesita Refratários SA for SEM observations.
Online since: August 2007
Authors: Hasan Mandal, A. Ceylan, E. Suvaci
SiAlONs can be formed by the
replacement of Si-N with Al-O in Si3N4 structure.
(i) The optimum amount of dispersant was found to be 7.6 mg/m 2 (ii) The dispersant addition affects surface chemistry, surface charge density and dispersion character of SiAlON forming powders (Si3N4, AlN and Y2O3) (iii) Dispersant existence in the system has an effective influence on dispersion and milling behaviors of the SiAlON forming powders.
Bergström (Eds.), Surface and Colloid Chemistry in Advanced Ceramic Processing, Dekker, New York (1994), p. 193 [15] L.
(i) The optimum amount of dispersant was found to be 7.6 mg/m 2 (ii) The dispersant addition affects surface chemistry, surface charge density and dispersion character of SiAlON forming powders (Si3N4, AlN and Y2O3) (iii) Dispersant existence in the system has an effective influence on dispersion and milling behaviors of the SiAlON forming powders.
Bergström (Eds.), Surface and Colloid Chemistry in Advanced Ceramic Processing, Dekker, New York (1994), p. 193 [15] L.
Online since: January 2012
Authors: Ke Jie Fu, Zheng Rong Li, Wei Ping Tu, Jie Zou
Synthesis and Application of a Novel Polymer as an Antimicrobial and Water and Oil Repellent Finishing Agent for Cotton
Zheng-rong Li1, Wei-ping Tu1, Ke-jie Fu3, Jie Zou2,
1College of Chemistry and Chemical Engineering, South China University of Technology,
WushanRd., Tianhe District, Guangzhou, 510641, China
2Reserarch and development department, Yorkshire Chemical group, Tianhe District, Guangzhou,
510660, China
3Textile products Inspection Center of NingBo Entry- Exit Inspection and Quarantine Bureau, No.6
East Yongxing Road, Songzhao Bridge, Ningbo, Zhejiang 315192, China
Fax: 86-20-28850078;
E-mail: lizhengrong@mail.dhu.edu.cn
Keywords: antimicrobial activity; cotton fabrics; redox initiator system; the novel polymer; water and oil repellency;
Abstract: A novel polymer APFC containing quaternary ammonium and perfluoroalkyl groups was designed and prepared by emulsion polymerization using interfacial redox initiator system, the average size of the emulsion particles was
Gram-positive Staphylococcus aureus (ATCC6358) and Gram-negative Escherichia coli (ATCC8099) were used as the test microorganism Results and discussions Characterization The structure of the polymer was confirmed by FTIR (Fourier transform infrared) analysis.
[6] Grajeck, E.J; Petersen, W.H., Oil and Water Repellent Fluorochemical Finishes for Cotton,Textile Research J. 32,320-331(1962) [7] Juliusz Pernak, Przemyslaw Chwala, Synthesis and anti-microbial activities of choline-like quaternary ammonium chlorides.European Journal of Medicinal chemistry 38,1035-1042(2003) [8] Ha-Soo Seong, Jae-Pil Kim,Sohk-Won Ko, Preparing Chito-Oligosaccharides as antimicrobial agents for cotton, Textile Res.
Gram-positive Staphylococcus aureus (ATCC6358) and Gram-negative Escherichia coli (ATCC8099) were used as the test microorganism Results and discussions Characterization The structure of the polymer was confirmed by FTIR (Fourier transform infrared) analysis.
[6] Grajeck, E.J; Petersen, W.H., Oil and Water Repellent Fluorochemical Finishes for Cotton,Textile Research J. 32,320-331(1962) [7] Juliusz Pernak, Przemyslaw Chwala, Synthesis and anti-microbial activities of choline-like quaternary ammonium chlorides.European Journal of Medicinal chemistry 38,1035-1042(2003) [8] Ha-Soo Seong, Jae-Pil Kim,Sohk-Won Ko, Preparing Chito-Oligosaccharides as antimicrobial agents for cotton, Textile Res.
Online since: March 2013
Authors: Lei Ren, Bin Bin Fan, Bin Dou
The crystal structures and the guest compositions of these hydrates are clearly ideated by using Raman spectroscopy and gas chromatography.
[9] Yakushev, V.S. and Istomin, V.A., “Gas hydrates self-preservation effect”, Physics and chemistry of Ice, Hokkaido University Press, Sapporo, Japan (1992), 136-139
[10] Stern, L., Circone, S., Lirby, S. and Durham, W., “Anomalous preservation of pure methane hydrate at 1 atm”, Journal of Physical Chemistry, 105 (2001), 1756-1762.
[9] Yakushev, V.S. and Istomin, V.A., “Gas hydrates self-preservation effect”, Physics and chemistry of Ice, Hokkaido University Press, Sapporo, Japan (1992), 136-139
[10] Stern, L., Circone, S., Lirby, S. and Durham, W., “Anomalous preservation of pure methane hydrate at 1 atm”, Journal of Physical Chemistry, 105 (2001), 1756-1762.
Online since: January 2016
Authors: H. Rosniza, Hussin Kamarudin, N.Z. Noriman, M.H. Fatin, N.R. Munirah, Muhammad Salihin Zakaria, A.M. Mustafa Al Bakri, Sam Sung Ting
Introduction
The physical properties of carbon blacks like particle size, surface area and structure play roles in affecting both rubber processing and vulcanizate properties significantly [1].
Fernandez, S.S. and Kunchandy, S.: Oriental Journal of Chemistry, 2013. 29(1): p. 219-226
Wampler, W.A., Carlson, T.F. and Jones, W.R., Carbon Black, in Rubber Compounding Chemistry and Applications, B.
Fernandez, S.S. and Kunchandy, S.: Oriental Journal of Chemistry, 2013. 29(1): p. 219-226
Wampler, W.A., Carlson, T.F. and Jones, W.R., Carbon Black, in Rubber Compounding Chemistry and Applications, B.