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Online since: November 2020
Authors: Lars A. Berglund, Ruth R. Aquino, Cyron L. Custodio, Delia B. Senoro, Xuan Yang, Astrid E. Wilsby, Victor F. Waller, Lemmuel L. Tayo
Effect of a Chemical Treatment Series on the Structure and Mechanical Properties of Abaca Fiber (Musa textilis) Cyron L.
The complex, multicomponent, hierarchical structure of abaca, which closely resembles other plant fibers[2], is illustrated in Fig. 1 which is a natural composite composed of cellulose, hemicellulose, and other non-cellulosic components (NCCs).
(Left) Hierarchical structure of an abaca fiber cell wall, and (right) a schematic diagram of raw and treated abaca fibers at the cellulose microfibril level.
Further removal of structuring pectin between microfibrils were carried out via acid hydrolysis using mild HCl, which led to substantial decrease in strength at 156 MPa (Fig. 4d), while stiffness was intact at 12.1 GPa (Fig. 4b).
In a multicomponent, hierarchical structure such as abaca, strength is a combination of load-bearing and load-transfer mechanism.
Online since: October 2010
Authors: Heng Zhang, Xiao Ming Qian
Electrospinning is a novel processing technique for the production of nanofiber non-woven materials and nanofiber non-woven materials have extremely high surface-to-mass (or volume) ratio and a porous structure .for the advantages of electrospun nanofiber non-woven materials, it can be used many filed.
Just as we all known that many biologically functional Molecules, extracellular matrix (ECM) components, and cells interact on the nanoscal,for example, collagen is a major natural extracellular matrix component, and possesses a fibrous structure with fiber bundles varying in diameter from 50~500 nm[17].
The filtration efficiency is normally influenced by the filter physical structure (fiber fineness, matrix structure, thickness, pore size, etc), fiber surface electronic properties, and its surface chemical characteristic (e.g. surface free energy).
Conclusions Electrospinning technique is the easy, safe, fast process to produce nanofibers with large surface areas, porous-surface, and core-sheath and side by side structures.
Cheng, S.Deng, P.Chen, Frontiers of Chemistry in China Vol4 (2009), P.259
Online since: May 2017
Authors: Andreas Öchsner, Seyedeh Alieh Kazemi, Sadegh Imani Yengejeh, Oleksandr Ivasenko
The effect of vacant sites in the arrangement of these nano-structures was examined.
The second approach for comparison purpose (previously reported) considers a re-modeling the bonds and considering the reformation of the structure.
Carbon nano-structures including CNTs, fullerenes, hetero-junction tubes, nano-cones, etc. are imagined by rolling up graphene sheets.
It has been stated that these defects have a remarkable influence on the behavior of nano-structures [13-15].
It should be noted that the bond length for a perfect structure is 0.142 nm [16, 17].
Online since: July 2013
Authors: Yue Feng Su, Yan Bang Wang, Xiao Dong Zhang, Wen Sheng Deng
The scene graph structure.
The 3D scene structure of the FTS process is built by using a tree structure.
The scene graph structure of the FTS process is shown in Fig.1.
Fig.6 Structure unit of chemical process and its adjacency matrix.
Computer And Applied Chemistry, 2012,29(5):583-586.
Online since: October 2025
Authors: Tan Dao Duy, Kozo Taguchi, Trang Nakamoto
Fabrication process and conceptual structure of (a) NCO/NF, (b) NiCoFe-LDH/NF, and (c) NiCoFe-LDH@NCO/NF.
Fig. 2(a) shows that the NiCo₂O₄ exhibits a sea-urchin-like structure formed by the assembly of nanoneedles.
The SEM images reveal a well-defined, porous structure that facilitates the diffusion of reactants.
The high performance of NiCoFe-LDH@NCO/NF can be due to the NiCoFe-LDH structure deposited on top of NCO.
Zhang, Recent advances in spinel-type electrocatalysts for bifunctional oxygen reduction and oxygen evolution reactions, Journal of Energy Chemistry 53 (2021) 290-302
Online since: September 2011
Authors: V. Andal, G. Buvaneswari
Introduction Copper (II) oxide, CuO crystallizes in monoclinic structure and is a p-type semiconductor with a band gap of 1.9 – 2.1 eV [1].
It is noticed that the different chemistry involved in the formation of the polymeric precursors results in different thermal decomposition processes of the precursors.
All the diffraction peaks can be indexed based on the monoclinic structure of ‘CuO’ [JCPDS file 72-0629/45-0937].
In the case of copper nitrate source, formation of a porous structure is noticed (Fig. 9).
The sources such as basic copper carbonate, copper nitrate and copper hydroxide lead to formation of nano CuO powder consisting of rectangle shape particles, cubical particles and porous structured phase respectively.
Online since: September 2016
Authors: João Carlos de Castro Abrantes, Raphaele Malheiro, Aires Camões, Rui Reis, M.J.P. Ribeiro, Elisabete Teixeira
These two phases are distinguished basically by the ordering of its internal structure.
Solids that do not have this microscopic arrangement are called amorphous and its internal structure stands “without a defined form”.
Proceedings of the 10th International Congress on the Chemistry of Cement, Gothenburg, Sweden, June 2-6, 1997.
Materials and Structures 48(3) 607-620
Yao eds. 14th International Congress on the Chemistry of Cement (ICCC2015).
Online since: March 2016
Authors: Lei Miao, Cheng Yan Liu, Xiao Yang Wang, Jie Gao, Yu Chen
Thermoelectric Enhancement of Polyaniline Grafting from Graphene Oxide Xiaoyang Wang1, a, Lei Miao1, b*, Chengyan Liu1, c, Jie Gao2, d and Yu Chen2, e* 1Guangxi Key Laboratory of Information Material, Guangxi Collaborative Innovation Center of Structure and Property for New Energy and Materials, School of Material Science and Engineering, Guilin University of Electronic Technology, No.1 Jinji Rd, Guilin, 541004, China 2Key Laboratory for Advanced Materials, Institute of Applied Chemistry, East China University of Science and Technology, No.130 Meilong Rd, Shanghai, 200237, China awoshion0000@gmail.com, bmiaolei@ms.giec.ac.cn, cliucy@ms.giec.ac.cn, dnextyeargj@gmail.com, echentangyu@yahoo.com Keywords: Graphene oxide (GO), Polyaniline (PANI), Thermoelectric.
Fortunately, organic chemistry provides a huge treasure trove of functional molecules that can be used to adjust the electronic properties of the polymers.
By using polymer materials as the TE materials, flexible and miniaturized TE devices with simple structure can be fabricated easily, resulting in simplified fabrication process and significantly reduced manufacturing cost.
Raman scattering which is upon excitation with 532 nm laser is also measured to characterize the chemical bonding structure.
When HCl is used as a dopant, the aniline monomer and the graphitic structure of GO can form weak charge-transfer complexes, resulting in the formation of PNAI coating on the surface of GO.
Online since: July 2013
Authors: Zhi Lin Wang, Hong Xia Liang
Effect of Indium Addition on the Electrochemical Behavior of Zinc Electrodes In Concentrated Alkaline Solutions Liang Hongxia 1,a, Wang Zhilin 2,b 1Department of Resource and Environmental Engineering, Panzhihua University 61700,china 2State Key Laboratory of Physical Chemistry of Solid Surfaces, Department of Chemistry,Xiamen University, Xiamen 361005 China aemail:370499524@qq.com, bemail: 545942766@qq.com.
Since dissolution of crystalline structures typically proceeds layer by layer along the steps, the formation of solid particles along the steps may have an effect of blocking the sites for the dissolution reaction.
It can be seen that for the pure zinc plate electrode, zinc was deposited as the ellipse crystallites to give a three-dimensional structure (Fig.8a), while the deposited zinc on the Zn99.95In0.05 alloy electrode was inclined to grow in the form of branch.
Increasing alloying concentration tend to increase the amount of surface active sites because it generally causes increasing inhomogeniety of the crystal structure, more displacement sites, vacant sites and misaligned regions such as grain boundaries.
In actual batteries the zinc anode is a porous structure made of zinc powder.
Online since: May 2013
Authors: Zulhelmi Ismail, Kamal Yusoh
In order to ensure that the processing condition of extruded PA6/C20A did not affected the composite-structure in a negative way; a thermogravimetric analysis (TGA) measurement was completed earlier.
[8] Shiyun Li, H.C., Dongmei Cui, Jianzhong Li, Zhenjiang Zhang, Yanhui Wang, Tao Tang, Structure and properties of multi-walled carbon nanotubes/polyethylene nanocomposites synthesized by in situ polymerization with supported Cp2ZrCl2 catalyst.
Composite Structures, 2006. 76(4): p. 406-410
[20] Xie W, G.Z., Pan W-P, Hunter D, Singh A, Vaia R., Thermal Degradation Chemistry of Alkyl Quaternary Ammonium Montmorillonite.
Industrial and Engineering Chemistry, 1954. 46(4): p. 5