Surface Chemical Modification and Characterization of Nano Fe2O3

2013 ◽  
Vol 345 ◽  
pp. 180-183
Author(s):  
Yan Liu ◽  
He Yi Ge ◽  
Xiu Zhi Zhang ◽  
Shi Feng Huang ◽  
Xin Cheng
Keyword(s):  
Contact Angle ◽  
Contact Angle Measurement ◽  
Angle Measurement ◽  
Organic Polymer ◽  
X Ray Diffraction ◽  
The Matrix ◽  
Ft Ir ◽  
Acidic Conditions ◽  
Surface Chemical Modification

The surface of nanoFe2O3 was modified with silane coupling agent 3-(methacryloyloxy) propyltrimethoxysilane (KH-570) under acidic conditions in order to improve the dispersity of particles in organic polymer and to enhance the interfacial bonding with the matrix. Contact angle measurement, thermogravimetric analysis (TG), Fourier transform infrared spectroscopy (FT-IR) and X-ray diffraction (XRD) were adopted to characterize and analyze the unmodified and modified nanoFe2O3. Through TG curves, it was calculated that when the KH-570 content was 25%, the grafting rate of Fe2O3 reached a maximum value at 7.28%. The FT-IR and XRD results indicated that KH-570 successfully modified the nanoFe2O3 with its organic functional groups chemically bonded on the surface of nanoFe2O3 which contributed to prevent particles from conglomerating. The surface treatment of nanoFe2O3 had no significant effect on the nanoparticles crystalline form. Contact angle measurement investigated that the hydrophile of modified nanoFe2O3 was decreased.

Physicochemical characterization of actinomycetes isolated from decayed cedar wood: contact angle measurement

2014 ◽  
Vol 28 (20) ◽  
pp. 2046-2053 ◽  
Author(s):  
Hajar Maataoui ◽  
Hassan Barkai ◽  
Moulay Sadiki ◽  
Abdellatif Haggoud ◽  
Saad Ibnsouda Koraichi ◽  
...  
Keyword(s):  
Contact Angle ◽  
Physicochemical Characterization ◽  
Contact Angle Measurement ◽  
Angle Measurement

SYNTHESIS AND CHARACTERIZATION OF SUPERHYDROPHOBIC ZnO HIERARCHICAL STRUCTURES

NANO ◽  
2011 ◽  
Vol 06 (03) ◽  
pp. 265-269 ◽  
Author(s):  
QUNBING ZHANG ◽  
SHIHE CAO ◽  
JUN WANG
Keyword(s):  
Contact Angle ◽  
Hydrothermal Process ◽  
Hierarchical Structures ◽  
Contact Angle Measurement ◽  
Angle Measurement ◽  
Zno Films ◽  
Water Contact ◽  
Simple Method ◽  
Microscopy Images

ZnO films with well-aligned hierarchical structures have been successfully synthesized at moderate temperatures using a simple catalyst-free hydrothermal process. The synthesized ZnO films are found to be single-phase, with a hexagonal wurtzite-type structure. Scanning electron microscopy images show that the well-aligned hierarchical structures are assembled with interlaced parallel sheets grown on the (400) silica surface. The water contact angle measurement indicates that the water on the films has a contact angle of about 156.3°. This clearly demonstrates that the ZnO films synthesized by this simple method have superhydrophobic properties and may be important for applications in self-cleaning surfaces, biology, and so on.

Preparation and Characterization of Surface-Modified β-Tricalcium Phosphate/Ploy(L-Lactide) Biocomposites

2011 ◽  
Vol 197-198 ◽  
pp. 120-126 ◽  
Author(s):  
Jun Zou ◽  
Xu Bin Jiang ◽  
Jing Zhang ◽  
You Shu ◽  
Xuan Chen ◽  
...  
Keyword(s):  
Tricalcium Phosphate ◽  
Tensile Tests ◽  
Contact Angle Measurement ◽  
Angle Measurement ◽  
Ionic Interaction ◽  
Digital Microscope ◽  
Ft Ir ◽  
Xrd Patterns ◽  
Surface Modified

A new surface modification method by modifying low molecular weight ploy (L-lactide) (LMW PLLA) onto the β-tricalcium phosphate (β-TCP) superfine particles has been developed. The surface-modified β-TCP is characterized by FT-IR, XRD, digital microscope and contact angle measurement, et al. FT-IR spectra confirmed that LMW PLLA was connected onto the β-TCP surface through ionic interaction. XRD results indicated that the LMW PLLA did not affect the crystalline form of β-TCP, but the XRD patterns of the p-β-TCP showed a little difference with β-TCP. The p-β-TCP particles could be dispersed uniformly in dichloromethane. In contrast, unmodified β-TCP particles are apt to agglomerate after dispersed into dichloromethane. Wet angle measurement showed that hydrolyzed LMW PLLA significantly improves hydrophobicity of modified β-TCP particles. For the preparation of composites, PLLA was mixed with β-TCP and p-β-TCP, respectively, in a ratio of 85/15 (w/w) and moulded into tensile test specimens. Tensile tests showed that mechanical properties were improved, scanning electron microscopy (SEM) exhibited that modified β-TCP is an effective approach to prepare a homogeneous composites, moreover, it indicated a better interfacial phase interaction in the composite with the p-β-TCP. Chemical bonds between filler and PLLA matrix are assumed to be formed by ionic interaction.

scholarly journals Dynamics on Molecular Films. Surface Characterization of Monolayers by the Wilhelmy-type Dynamic Contact Angle Measurement.

Hyomen Kagaku ◽  
2000 ◽  
Vol 21 (10) ◽  
pp. 643-650
Author(s):  
Koji ABE ◽  
Satomi OHNISHI ◽  
Haruhisa AKIYAMA ◽  
Hiroshi TAKIGUCHI ◽  
Kaoru TAMADA
Keyword(s):  
Contact Angle ◽  
Surface Characterization ◽  
Dynamic Contact Angle ◽  
Dynamic Contact ◽  
Contact Angle Measurement ◽  
Angle Measurement ◽  
Molecular Films

Synthesis and characterization of the polyacrylate latex functionalized by fluorine and silicon

e-Polymers ◽  
2007 ◽  
Vol 7 (1) ◽  
Author(s):  
Xiaofeng Ding ◽  
Rong Guan ◽  
Peizhi Chen
Keyword(s):  
Surface Energy ◽  
Water Resistance ◽  
Contact Angle Measurement ◽  
Angle Measurement ◽  
Latex Films ◽  
Water Contact ◽  
Energy Estimation ◽  
Ratio Measurement ◽  
Ft Ir

AbstractNovel functionalized polyacrylate latex with fluorine and silicon was prepared by semi-continuous dropping technique. 19F NMR, elemental analysis of the silicon (EAS) and FT-IR measurements prove that 2,2,2-trifluoroethyl methacrylate (TFEMA) and α,ω-bis(hydroxyl)polydimethylsiloxane (PDMSH) is successfully polymerized. TEM demonstrates that the functionalized latex particles were spherical, uniform and stable. Contact angle measurement and surface energy estimation show that the highest water contact of the functionalized latex films were 118.3° and the surface energy was as low as 11.7 mJ/m2. Water absorption ratio measurement reveals that the water resistance of the functionalized latex films is improved. The heat resistance of the functionalized latex films does not show a large difference from that of the original polyacrylate in our investigated systems.

scholarly journals The influence of alumino-silicate matrix composition on surface hydrophobic properties

2019 ◽  
Vol 51 (2) ◽  
pp. 163-173 ◽  
Author(s):  
Ljiljana Kljajevic ◽  
Zuzana Melichova ◽  
Danilo Kisic ◽  
Milos Nenadovic ◽  
Bratislav Todorovic ◽  
...  
Keyword(s):  
Contact Angle ◽  
Contact Angle Measurement ◽  
Angle Measurement ◽  
Matrix Composition ◽  
Homogeneous Surface ◽  
Angle Measurements ◽  
Contact Angle Measurements ◽  
Sem Micrograph ◽  
Alumino Silicate

The purpose of this investigation is to investigate the hydrophobicity of geopolymers, new alumino-silicate materials and the influence of Si/Al ratio on their surface properties. Contact angle measurement (CAM) as reliable indicator of hydrophobicity was determined for synthesized geopolymers using water and ethylene-glycol as reference liquids. Geopolymers were synthesized from various precursors: kaolin, bentonite and diatomite. Characterization of phase structure and microstructure was performed by XRD, FTIR, SEM/EDX methods. Contact angle measurements confirmed that the geopolymers synthesized from metakaolin are the most porous, which can be explained by the smallest Si/Al ratio. The maximum value of contact angle and free surface energy (110.2 mJ/m2) has been achieved for geopolymer synthesized by diatoms (GPMD). SEM micrograph of GPMD shows a homogeneous surface with some longitudinal cavities in the gel and is significantly different from the micrographs of other two geopolymer samples, GPMB and GPMK.

Surface characterization of poly(styrene-co- fluoroalkylfumarate): XPS and contact angle measurement study

1999 ◽  
Vol 71 (7) ◽  
pp. 1049-1054 ◽  
Author(s):  
Shinya Kato ◽  
Yasuhiro Ueno ◽  
Akio Kishida ◽  
Tsuyoshi Miyazaki ◽  
Takeo Matsumoto ◽  
...  
Keyword(s):  
Contact Angle ◽  
Surface Characterization ◽  
Contact Angle Measurement ◽  
Angle Measurement ◽  
Measurement Study
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