Search results

College of chemistry and Molecular Engineering, Peking University's infrared spectroscopy laboratory calibrated the samples' dichroism and calculated the orientations with formula (2) [5].
That is to say ultrasonic wave velocity perpendicular to orientation direction alters obviously after improving the orientation degree, all these mean that there is a relation between ultrasonic wave velocity perpendicular to orientation direction and orientation degree of polymer material, where the change of material inner structure results in the change of velocity.
Orientation degree soft-sensing modeling based on SVM.The SVM principle is mapping an input vector through some pre-selected non linearity map into a high dimensional feature space, in which the best classification hyper-plane is constructed. 1) The network structure of SVM model SVM function in form is similar to a network structure with 3 layers: input layer, hidden layer and output layer, in which the output layer is a linear combination of n intermediate nodes, and every intermediate node corresponds to a support vector.
Phase structure composition and orientation of PC/PSAN blends studied by Raman spectroscopy, confocal Raman imaging spectroscopy and polarized PA-FTIR spectroscopy [J].

Green Chemistry Group, Centre for Technical Textiles, School of Design, University of Leeds, LS2 9JT, UK 2.
Aggregate structure Intermediate chain structure (without silica) (low silica content) Network Partial network (optimum silica content) (excess silica content) Figure 5 the effect of silica on the distribution of carbon black When no silica was employed, most of carbon black individual particles will form large aggregates/agglomerates.
At a given loading of silica, most carbon black particles will stay as small branched structure aggregates/agglomerates or individual particles.
The generated electrical network of carbon black is destructed to partial network and the surface coating turns to silica rich phase structure, which prevents the occurrence of electron flow, resulting in high resistivity.

In Fig. 1a the typical flake structure of the carbon inks and the smooth featureless structure of POT are apparent indicating that not all the carbon screen printed area has been covered by the drop casting.
It is apparent that at this current density the electrochemical area is not completely covered by the polymer, as the flake-like structures of the carbon ink substrate are visible.
In this case the conformation of the PEDOT layer looks different, with bigger globular structures than the cobweb cover in Fig. 4a.
(Ed.), Comprehensive Analytical Chemistry, Elsevier, 2007, pp. 73

Decoloration of methylene blue via mesoporous silica microspheres doped with TiO2 Hongjuan WEI 1, a, Yuan CAO 1, b, Bolin Liu1, c, Xiao Wang1, d and Yanqin Xu1, e 1 College of Chemistry & Chemical Engineering, Chongqing University, Chongqing, 400044，China a whj19851015@163.com, b caoyuan@cqu.edu.cn, c liubolin6@yahoo.cn, d tobeaflyingbird@163.com, e xuyanqin666@163.com Keywords: mesoporous silica microsphere (MSM); mesoporous silica microspheres doped with TiO2 (TiO2/MSM); methylene blue Abstract.
The methods most widely used can be divided into two categories：one is one-step synthesis which means introducing Ti into silica structures while synthesizing silica vector, and the other is two-step synthesis which means first synthesizing silica and then introducing into TiO2 through the reaction between titanium source and Si-OH on the surface of silica [4].One-step synthesis makes titanium dioxide dispersed in the whole system uniformly.
The XRD diagram of TiO2/MSM in small angles is similar, which suggests keeping the uniform pore structure.
b a Fig. 1 XRD diagram of the samples, a, MSM; b, TiO2/ MSM FT-IR The FT-IR spectra of MSM and TiO2/MSM are almost similar, suggesting their framework structures consistent.
The nitrogen adsorption–desorption isotherms show small hysteresis, corresponding to a reversible type Ⅳ isotherm, which indicates that both of the samples have typical mesoporous structures.

The proposed grafting structure is illustrated in Fig.1.
PLA MA NR Figure 1 The proposed structure of PLA-g-NR using MA as a linker The reactive blend without and with the presence of TO were denoted as LA-g-NR and LA-g-NR(TO), respectively.
The Bruker Optik GmbH proton nuclear magnetic resonance spectroscopy (1H-NMR) was used to characterize the structure of PLA-g-NR.
The Fourier transform infrared spectroscopy (FTIR) was used to confirm the PLA-g-NR structure.
Lopez-Manchado: Materials Chemistry and Physics Vol. 129(3) (2011), p. 823-831 [10] W.

Polyethylene and the Nucleating Agent: Dibenzylidene Sorbitol, a Neutron Scattering Study Geoffrey R Mitchell1,a*, Supatra Pratumshat 2,b and Robert Olley3,c 1Centre for Rapid and Sustainable Product Development Institute Polytechnic of Leiria Marinha Grande, Portugal 2Department of Chemistry, Faculty of Science, Naresuan University Phitsanulok 65000 Thailand 3EMLAB University of Reading, Whiteknights, Reading UK ageoffrey.mitchell@ipleiria.pt, bsupatraw@nu.ac.th, cgwefan-rho@hotmail.com Keywords: crystallization; morphology; nanoparticles; shear; orientation; small-angle neutron scattering Abstract.
However for polyethylene crystallisation at temperatures above 120°C the nucleating efficiency of DBS reduces dramatically and the lamellar morphology is replaced by axialites or the early stage of a spherulite structure.
It is particular appropriate to the study of large scale structure (1nm-100nm) such as the nanoscale DBS fibrils It has the advantage that the scattering contrast can be varied using isotopic substitution, for example, the scattering length of hydrogen is -3.74 fm while deuterium is 6.67 fm.
The value obtain is ~ 3 indicaating a 3d spacing filling structure which suggests much branching.
Olley ‘Controlling Morphology Using Low Molar Mass Nucleators’ in “Controlling the Morphology of Polymers: Multiple Scales of Structure and Processing."

Comparison the Physical and Antimicrobial Properties of Poly(Lactic Acid) Film and its Composites with ZnO Nanoparticles Tongsai Jamnongkan1,a*, Nareerat Kamlong1,b, Nicha Thiangtrong1,c and Rattanaphol Mongkholrattanasit2,d* 1Department of Fundamental Science and Physical Education, Faculty of Science at Sriracha, Kasetsart University, Chonburi 20230, Thailand 2Department of Textiles Chemistry Technology, Faculty of Industrial Textiles and Fashion Design, Rajamangala University of Technology Phra Nakhon, Bangkok 10300, Thailand a*sfscitsj@src.ku.ac.th, bkaew_nareerat@outlook.com, cgift_choc@hotmail.com, d*rattanaphol.m@rmutp.ac.th *Corresponding author Keywords: Nanomaterials, Composite, Poly (lactic acid), ZnO nanoparticles, Antimicrobial property Abstract.
The surface morphology and chemical structure of each film were studied by SEM and FTIR, respectively.
Results and Discussion Firstly, we determined the chemical structure of biocomposite films by FT-IR.
This is probably due to the effect of functionality of chemical structure of ZnO NPs that has hydrophilic property.
On the other hands, the Gram-negative bacteria strains, the cell wall is composed of an organized triple layer structure comprising a thin layer of peptidoglycan sandwiched between an asymmetric lipid bilayer outer membrane composed of lipopolysaccharides, phospholipids, and proteins compound and an inner cytoplasmic membrane.

Liang researched the RGD adsorption mechanism on TiO2 nano structure surface.
The intermolecular forces can be categorized into the interaction between the water molecules, and the interaction between aluminum atoms and water molecules.In this simulation, the rigid model of TIP4P water is chosen to described the structure and thermodynamic characteristics of water molecules.
Figure 1 TIP4P water model molecular structure diagram The rigid model of TIP4P water is adopt to simulate the water molecules, and the water molecular potential function (U) is comprised of two interactions, as is demonstrated in the formula (1), (1) where is Lennard-Jones potential between oxygen atoms, and is Coulomb force between electric charges.
Molecular Structure and Dynamics in Thin Water Films at Metal Oxide Surfaces: Magnesium, Aluminum and Silicon Oxide Surfaces[J].
Journal of Physical Chemistry C， 2009(113)：19591–19600

Nano-structured energetic materials include nanoscale objects with low percentage can lead to obvious increase in the performance of the compositions [1-3].
The crystalline structure of prepared Nano-CuO was tested by X-ray diffractor (XRD) where the angle was in range from 5 to 80 0C.
The diffraction pattern of the incident beam clarified that the structures of the crystals have a single mono shape of crystals (Fig. 1-b).
XRD diffractogram of the synthesized nano-CuO demonstrated pure crystal structure of CuO (Fig. 2).
Li, Inorganic chemistry. 47(19) (2008) 8839-8846

This harvesting layer possesses a stable crystalline structure at room temperature and high carrier mobility, which potential to the application of solar cell [8,9].
These XRD results are consistent with the orthorhombic crystal structure of CsPbBr3 with lattice parameters of a=8.26, b=11.79, and c=8.19, and the presence of a small fraction of Cs4PbBr6 was also confirmed.
CsPbBr3 peaks matches with Inorganic Crystal Structure Database (ICSD #97851) at 2θ = 14.9o, 21.2 o, 23.5 o, 26.1 o, 28.4 o, 28.7 o, 30.76 o, 34.3 o, 38.7 o with index (101), (002), (102), (002), (122), (112), (202), (113) and (123) respectively.
Zhang, “All-inorganic cesium lead halide perovskite nanocrystals: Synthesis, surface engineering and applications,” Journal of Materials Chemistry C, vol. 7, no. 4. 2019
Liu et al., “Effects of CsPbBr3 nanocrystals concentration on electronic structure and surface composition of perovskite films,” Org.