Search results

Preparation of Lignocellulose Aerogel from Wood-ionic liquid Solution Cheng Chen1, 2, a, Jian Li 1, b 1Key Laboratory of Bio-based Material Science and Technology, Ministry of Education, Northeast Forestry University, Harbin, 150040, P.R.China 2 College of Chemistry and Chemical Engineering, Daqing Normal University, Daqing, 163712, P.R.China a cc523@126.com, b nefulijian@163.com Key words: ionic liquids, aerogel, wood powder, network structure, supercritical drying, FTIR Abstract.
All aerogels were compressible and consisted of nanofibrillar biomaterial network with open-pore structure.
Some physical chemistry methods are used to treat wood to obtain functional nanomaterial, such as immersion swelling [1], dissolution and precipitation [2] and sol-gel method.
Our research group proposed a new idea that light wood have the similar structure with aerogel, having potential to made to a new type wood-aerogel[5,6] ,which is based on natural structure of light wood, to have both structure of aerogel and advantage of wood.
Journal of Agricultural and Food Chemistry, 55, 9142–9148. (2007)

However, there are few chemistries available that can remove polymer and native oxide while remaining selective to both tungsten and silicon.
The spray acid chamber is designed to allow multiple chemistries to be delivered to the wafer in-situ, providing tight process control while eliminating the risk of metallic impurities contamination.
Figure 8: P+Cell contact resistance result on product lot between baseline and Fluorine based chemistry in single processor.
Conclusions The requirement to improve physical and electrical parameters in MOL contact, especially for local interconnect, without impacting sensitive structure has been achieved using a one-step, single-wafer single-chemical process.
The new chemistry sequence, has fully replaced all MOL contact clean processes using this new single-wafer processing tool.

Journal of Electroanalytical Chemistry, 2019,844:86-90
Journal of Electroanalytical Chemistry, 2019,847:113265
Chemistry - A European Journal, 2019
Journal of Energy Chemistry, 2020,40:89-98
Journal of Electroanalytical Chemistry, 2019

Introduction Recently, structural steel plates used for building, bridge, ship building, offshore structure, and pipeline have been increasingly required to have higher strength and toughness as well as excellent deformability.
In particular, high deformability such as low yield ratio (yield to tensile strength ratio) and high uniform elongation are being of vital importance in steel structures subjected to the progressive and abrupt displacements, which may be caused by ground movements, structure load and earthquake under their service environment.
Chemistry and Processing Design Four kinds of steels with lean chemistry, satisfying Ceq < 6.0 and ECO alloy index < 3.5, as listed in Table 1, were produced by a vacuum induction melting furnace.
Therefore, the DBTT of the A and B specimens was 0.03C 0.05C 0.07C 0.07C* 500 600 700 800 900 1000 1100 Yield Strength (MPa) Chemistry (wt.%) A Process B Process 0.03C 0.05C 0.07C 0.07C* 500 600 700 800 900 1000 1100 Tensile Strength (MPa) Chemistry (wt.%) A Process B Process 0.03C 0.05C 0.07C 0.07* 0.60 0.65 0.70 0.75 0.80 0.85 0.90 Yield Ratio Chemistry (wt.%) A Process B Process (a) (b) (c) (d) 0.03C 0.05C 0.07C 0.07* 4 5 6 7 8 9 10 Uniform Elongation (%) Chemistry (wt.%) A Process B Process increased as the strength was increased with carbon content.
Dual phase structure has shown that it can efficiently obtain high deformability in the ultra-high strength steel plates [2,6-9].

Generally, layered rock salt structures, spinel structures and olivine structures are the current interest crystal structure of cathode materials.
LiCoO2 forms the α-NaFeO2 structure, which is a distorted rock- structure where the cations order in alternating (1 1 1) planes.
Fig. 2 : Layered structure of LiCoO2 [4].
Oosawa, Synthesis and structure refinement of LiCoO2 single crystals, Journal of Solid State Chemistry, 141 (1998) 298–302
Takano, Phase relationship and lithium deintercalation in lithium nickel oxides, Journal of Solid State Chemistry, 110 (1994) 216–225

The aim of this work is the selection of optimum conditions of carbonization and the study of the structure of obtained adsorbents. [5].
As can be seen from this figure, the particles have a porous structure.
[2].Suzdalev I.P Nanotechnology: the physics and chemistry of nanoclusters, nanostructures and nanomaterials. - M.: KomKniga, 2006.
Chemistry and chemical technology.Modern Problems.
Some Problems of the Development of Physics and Chemistry of Carbon Materials, Eurasian chemico-technological journal 5, (2003), P 1-6.

In this study, we focused on the cleaning of aluminum interconnections, on single wafer tool, with a cheap and easy to use chemistry.
The predominant process for removing aluminum post-etch residue has been the use of amine-based chemistries, formulated with hydroxylamine (HDA) as the main active component.
This maybe due both to oxygen control and also to a better control of the chemistry dispense over the wafer.
Diluted HF process was then applied on real patterned structures.
It was found that aluminum consumption was lower on the real structure than on blanket wafer.

The Density Function Theory (DFT) method were employed to study the geometry structures of bisphenol A and epichlorohydrin and the product was obtained on the base of B3LYP/6-31G+ model in this paper.
And the combination of quantum chemistry and materials science with great practical value will promote the development of atomic and molecular physics and the molecular design of new materials［3-4］.
The mechanism of the ring-opening reaction of bisphenol A and epichlorohydrin is studied by the method of microcosmic and quantum chemistry in this article.
Calculating method and reacting process of the ring-opening reaction Firstly, the geometry structures of bisphenol A and epichlorohydrin monomers were optimized by Gaussian03, shown in Fig. 1.
Since bisphenol A had a symmetrical structure, the bond length and bond angle in the molecular structure was symmetrical.

This Fig. shows a decreasing energetic trend as the structures grow.
Energies [a.u] for the PAMAM polymeric structures at the HF/3-21G* level Table 1.
Bader: An Introduction to the Structure of Atoms and Molecules (Toronto, Clarke, 1970)
Ballauff: Structure of Dendrimers in Solution as Probed by Scattering Experiments, in Structure and Dynamics of Polymer and Colloidal Systems (Eds.: R.
M and Weinhold F: Theoretical Chemistry Institute (2001), University of Wisconsin, Madison

The Synthesis and Ion-exchange Property of Li+ Memorized Inverse Spinel Mg2Ti0.5(PO4)2 Jinhe Jiang MicroScale Science Institute , Department of Chemistry and Chemical Engineering ,Weifang University, Weifang, 261061,China Corresponding author.
In this paper, the discussion is about the synthesis, structure and ion exchange of the Mg-Ti metal compound inorganic ion exchanger of Li+ with the ability of memory and inverse spinel structure.
The structure of compound metal oxide Mg2Ti0.5(PO4)2 crystallized at 750℃ was much perfect.
Jiang, C.R.Wan, H.C.Gao: Advance on extraction lithium from salt lake, J.Chemistry Online. 1997,(12),11 [3] D.Q.Dong, J.Zhong, D.L.Liu, Y.F.Liu: LiCu0.5Mn1.5O4 synthesis and Li+ extraction/reaction with it in the aqueous phase, J.China Journal of Applied Chemistry . 1998,15(3),11 [4] H.Zhong: Prpperty of H2TiO3 type ion-exchangers and extraction of lithium from brine of natural gas wells, J.Chinese Journal of Applied Chemistry. 2000,17(3),307