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Online since: November 2015
Authors: J. Madhavan, J. Theerthagiri, R.A. Senthil
Madhavan a,* 1 Solar Energy Lab, Department of Chemistry, Thiruvalluvar University, Vellore-632 115, India.
The crystal structure as ascertained by X-ray diffractometer and the crystalline size was calculated using Sherrer’s equation, t = 0.9/βcosθ, where t is the crystalline size, λ is the wavelength of X-ray radiation, β is the fullwidth at half maximum (FWHM) in radian and θ is the diffraction angle [27].
The pure CdS and ZnS phases crystallize in cubic structure and the average crystalline size of the sample was found to be 3.42 to 2.65 nm.
A: Chemistry 183 (2006) 218–224
Online since: January 2018
Authors: Alva Peled, Ehud Cohen, Gabriela Bar Nes
Materials containing high amount of silica and alumina such as fly ash, metakaolin or blast furnace slag, can be integrated in ordinary Portland cement (OPC) matrix resulting in a blended cement with improved mechanical, environmental and economic performance [1,2], or alternatively be activated by mixing with alkaline solutions [3,4,5], producing a standalone geopolymeric structure suitable for application in the construction industry.
Activator (wt.%) QD (wt.%) Fly Ash (wt.%) Samples 50 0 100 FA 45 10 90 FA10 40 20 80 FA20 35 30 70 FA30 30 40 60 FA40 2.3 Characterization methods The chemistry of the raw materials and the hardened paste specimens was studied using X-ray diffraction (XRD) and thermogravimetric analysis (TGA).
Davidovits, Geopolymer Chemistry and Applications, fourth ed., Institute Geopolymer, Saint-Quentin, France 2015
Shah, Factors affecting the resistance of cementitious materials at high temperatures and medium [0] heating rates, Materials and Structures 39 (2006) 455–469
Online since: May 2020
Authors: Jun Ge Zhi, Yin Yin, Wen Sheng Deng, Li Chao Dong, Na Jin, Yan Guan
Synthesis and Aggregation-Induced Emission Feature of Series of Polysiloxanes Containing Triphenylpyrrole Side-Chain Yin Yin1,a, Lichao Dong1,b, Na Jin1,c, Yan Guan2,d, Junge Zhi1,e* and Wensheng Zheng1, f 1Beijing Key Laboratory of Photoelectronic/Electrophotonic Conversion Materials, School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing 100081, China 2College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China a312203214@qq.com, b312203214@qq.com, cNaJin2@mt.com, dyanguan@pku.edu.cn, ezhijunge@bit.edu.cn, fdengwsmail@qq.com Keywords: Aggregation-induced emission, triphenylpyrrole side-chain, polysiloxane, optical active polymers Abstract.
Polymers with AIE characteristic developed rapidly and had drawn considerable attention since the first AIE-active polymers were reported in 2003, mainly attributing to both the more attractive advantages such as structure variation, multiple functionalization, high processability and thermostability, and simple device fabrication, and the great potential application in ion detection, drug sustained release and the fabrication of miniature electronic and photonic devices [10-17].
Herein, we report a series of AIE-active polysiloxanes with triphenylpyrrole (TPP) side-chain, or with both triphenylpyrrole and cholesteryl ether side-chains, and the structure-activity relationship are explored in detail.
Online since: August 2017
Authors: Winita Punyodom, Sawarot Phetsuk, Puttinan Meepowpan, Nawee Kungwan, Wanich Limwanich
Influence of Molecular Weight on the Non-Isothermal Melt Crystallization of Biodegradable Poly(D-Lactide) Wanich Limwanich1,a * Sawarot Phetsuk 2,b Puttinan Meepowpan 2,c Nawee Kungwan2,d and Winita Punyodom2,e 1Faculty of Sciences and Agricultural Technology, Rajamangala University of Technology Lanna, Chiang Mai 50300, Thailand 2Polymer Research Laboratory, Department of Chemistry, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand awanich.lim@gmail.com, bswr.phetsuk@gmail.com, cmeepowpan@gmail.com, dnaweekung@gmail.com, ewinitacmu@gmail.
When, the melted polymer is cooled down, the polymer chains easily arrange to form crystal structure.
The obtained results demonstrate that the Tm value increases with increasing molecular weight of PDL but ∆Hm decreases because the longer chain of PDL increases the chain entanglement and reduces the chain orientation to form the crystal structure.
Department of Chemistry, Faculty of Science, Chiang Mai University were also acknowledged.
Online since: February 2014
Authors: Zhen Hua Li, She Ming Jiang, Qi Fu Zhang, Shi Jie Feng
Bellhouse ever indicated that reactive wetting occurred by two methods when galvanizing high Al-low Si TRIP steels: reduction of MnO by the dissolved Al in the Zn(Al,Fe) bath and by Zn bridging of the oxide particles, and the mechanism was dependent on the surface structure prior to galvanizing, if the oxide covers on the surface of steel, the bridging effect won’t happen[6].Vitreous film-like oxide can hamper the diffusion of zinc and aluminum that is necessary for them to react with metallic iron[18]and result in bare spot.
The Journal of Physical Chemistry, 1984, 88(21): 4922-4929
[11] Norden, M., et al., The change of steel surface chemistry regarding oxygen partial pressure and dew point.
McDermid, Development of the surface structure of TRIP steels prior to hot-dip galvanizing.
Online since: April 2021
Authors: Inge Magdalena Sutjahja, Daniel Kurnia, Akhmad Yusuf, Annisa Rahman, Risky Afandi Putri
.%) (further referred to as BS) as a nucleating agent for CaCL were purchased from Sigma Aldrich Chemistry with the purity of 98%, 99%, and 97.5%, respectively.
Ford, Infrared spectrum and structure of liquid water.
Wu, Tuning of magnetism of SrTiO3 by site-specific doping, Materials Chemistry and Physics, 160 (2015) 80-86
Xu, Efffect of applied electric field on the formation and structure of ice in biomaterials durinf freezing, presented at International Conference on Solid Dielectrics 2010, Potsdam, Germany (2010).
Online since: March 2013
Authors: Jin Long Li, Hong Bo Li, Yong Xin Wang, Li Ping Wang
The crystalline structure of the prepared sample was identified using an X-ray diffractometer with Cu Kα radiation (Bruker AXS D8 Advance).The surface chemical composition of the samples was analyzed with X-ray photoelectron spectroscopy (SHIMADZU AXIS UTLTRADLD) with Al Kα riadiation source.
Then the hexagonally ordered structure of dimples is used as a template in the second anodization step.
Breuer, The influence of transition metal doping on the physical and photocatalytic properties of titania, Journal of photochemistry and photobiology A: Chemistry, 121(1999)49-53
Tompkins, Titanium nitride oxidation chemistry: An X-ray photoeledtron spectroscopy study, J.
Online since: March 2020
Authors: Achmad Chafidz, Esa N. Shohih, Henry A. S. Lomi, Betha P. Pratiwi, Sperisa Distantina, Mujtahid Kaavessina
Graphite is stable allotropic carbon material that has three-dimensionally ordered with strongly anisotropic structure, soft, slippery, opaque to light, and high resistance to the chemical reaction.
It was indicating that micro-graphite may facilitate the arrangement of the PLA chains in a crystalline structure.
Khoddami, Fibre Chemistry, 41:6 (2009) 391-401
Zahrani, Procedia Chemistry, 4 (2012) 164-171.
Online since: May 2012
Authors: De Liang Liu, Na Peng, Kai Feng Wang
Physicochemical Properties of Artificial Soil Composed of Sewage Sludge, Fly Ash, and Slag Wang Kaifeng1,a, Peng Na1,2,b and Liu Deliang3,c 1 Department of Chemistry and Environmental Sciences, Jiaying University, Meizhou, China 514015 2Department of Applied Chemistry, Guangdong University of Technology, Guangzhou, China 510006 3Department of Life Sciences, Jiaying University, Meizhou, China 514015 akfwang11@163.com, bpengna12@163.com, cldl@jyu.edu.cn Keywords: Municipal sewage sludge, Fly ash, Slag, Artificial soil, Water-holding capacity, Water permeability Abstract: The pH, electric conductivity (EC), nutrients, heavy metals, water-holding capacity and water permeability of stabilized sewage sludge were investigated by mixing municipal sewage sludge with alkaline fly ash and slag.
This improves these artificial soils porosity and structure and formed better soil pore structure to make these artificial soils show good water permeability.
Online since: November 2020
Authors: Robert Vaßen, Pavel Komarov, Barbora Pijáková, Dapeng Zhou, David Jech, Ladislav Čelko
Wetting behavior mostly depends on surface chemistry and surface roughness of each material.
While the modified samples Skewness (Sk < 0) showed predominant number of valleys/pores than peaks due to porous dendritic structure layer formed from nano-sized particles by additional RF plasma surface modification.
These valleys/pores of dendritic structure formed traps for the air.
Chemistry 8 (1936) 988-994