scholarly journals Effect of Nanoparticle Surface Modification and Filling Concentration on Space Charge Characteristics in TiO2/XLPE Nanocomposites

2016 ◽  
Vol 2016 ◽  
pp. 1-10 ◽  
Author(s):  
Youyuan Wang ◽  
Kun Xiao ◽  
Can Wang ◽  
Lijun Yang ◽  
Feipeng Wang
Keyword(s):  
Surface Modification ◽  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Space Charge ◽  
Volume Resistivity ◽  
Charge Accumulation ◽  
Nanoparticle Surface ◽  
Nanoparticle Surface Modification ◽  
Resistivity Testing ◽  
Scanning Electron

This paper focuses on the space charge characteristics in TiO2/cross-linked polyethylene (XLPE) nanocomposites; the unmodified and modified by dimethyloctylsilane (MDOS) TiO2 nanoparticles were added to XLPE matrix with different mass concentrations (1 wt%, 3 wt%, and 5 wt%). The scanning electron microscope (SEM) showed that the MDOS coupling agent could improve the compatibility between TiO2 nanoparticles and XLPE matrix to some extent and reduce the agglomeration of TiO2 nanoparticles compared with unmodified TiO2 nanoparticles; the volume resistivity testing indicated that the volume resistivity of TiO2/XLPE nanocomposites was higher than Pure-XLPE and increased with the increase of filling concentrations. According to the pulsed electroacoustic (PEA) measurements, it was concluded that the space charge accumulation was suppressed by filling TiO2 nanoparticles and the distribution of electric field in samples was improved greatly. In addition, it was found that the injection of homocharge was more obvious in MDOS-TiO2/XLPE than that in UN-TiO2/XLPE and the homocharge injection decreased with the increase of filling concentration.

Effect of nanoparticle surface modification on breakdown and space charge behavior of XLPE/SiO2nanocomposites

2014 ◽  
Vol 21 (4) ◽  
pp. 1554-1564 ◽  
Author(s):  
Ling Zhang ◽  
Yuanxiang Zhou ◽  
Xiaoyang Cui ◽  
Yanchao Sha ◽  
Trung Hieu Le ◽  
...  
Keyword(s):  
Surface Modification ◽  
Space Charge ◽  
Nanoparticle Surface ◽  
Nanoparticle Surface Modification

Chemical Reaction and Morphology of Polypropylene (PP)/Recycled Acrylonitrile Butadiene Rubber (NBRr)/Banana Skin Powder (BSP) Composites with γ-APS

2016 ◽  
Vol 1133 ◽  
pp. 175-179
Author(s):  
Azlinda Abdul Ghani ◽  
Ragunathan Santiagoo ◽  
Tunku Alisha Zanariah Tunku Ozir ◽  
Sam Sung Ting ◽  
Hanafi Ismail
Keyword(s):  
Surface Modification ◽  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Morphological Study ◽  
Functional Group ◽  
Butadiene Rubber ◽  
Intense Band ◽  
Acrylonitrile Butadiene Rubber ◽  
Roll Mill ◽  
Scanning Electron

Polypropylene (PP)/ recycled acrylonitrile butadiene rubber (NBRr)/ banana skin powder (BSP) composites were studied. Different BSP filer loading (5, 10, 15,20,25,30 wt. %) were prepared by using heated two roll mill at 180 °C. Then, the composites were tested for functional group using FTIR model Perkin Elmer Series 2. Field Emission Scanning Electron Microscope (VPFESEM) model Zeiss SUPRA 35VP also were using for morphological study. The effect of 3-aminopropyltrimethoxysilane (APS) as coupling agent were evaluated.The FTIR test shows different bands around 3200-3500 and 1740 cm-1 which represent the stretching of OH and C=O groups respectively. As for BSP which composed mostly of cellulose, hemicelluloses and lignin, the cellulose backbone C-OH is represent by the peaks of 1050 and 1048 cm-1 respectively. The γ-APS intense band around 1167 cm-1 and 1098 cm-1 in treated composite was assigned to the stretching of the-Si-O-Cellulose and –Si-O-Si-bond respectively. The large band around 1050 cm-1 found on BSP filler was attribute to the –Si-OH group which later this band will disappear after the surface modification. This evidenced that bonding between γ-APS treated BSP with PP/NBRr matrices. Morphological study supported this finding which BSP filler treated with γ-APS has improved the adhesion between BSP filler and PP/NBRr matrices.

The Alteration of the Pore Spaces in Sandstones

1973 ◽  
Vol 31 ◽  
pp. 210-211
Author(s):  
R. E. Ferrell ◽  
G. G. Paulson
Keyword(s):  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
The Other ◽  
Coarse Grained ◽  
Depositional Fabric ◽  
Soluble Components ◽  
Scanning Electron ◽  
Shape And Size

The pore spaces in sandstones are the result of the original depositional fabric and the degree of post-depositional alteration that the rock has experienced. The largest pore volumes are present in coarse-grained, well-sorted materials with high sphericity. The chief mechanisms which alter the shape and size of the pores are precipitation of cementing agents and the dissolution of soluble components. Each process may operate alone or in combination with the other, or there may be several generations of cementation and solution.The scanning electron microscope has ‘been used in this study to reveal the morphology of the pore spaces in a variety of moderate porosity, orthoquartzites.

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