scholarly journals COMPREHENSIVE APPROACH TO ENSURE DURABILTY OF EXTERNAL WOODEN STRUCTURES

Wood Research ◽  
2021 ◽  
Vol 66 (6) ◽  
pp. 900-911
Author(s):  
PETR KUKLÍK ◽  
ZDENĚK PROŠEK ◽  
ANNA GREGOROVÁ
Keyword(s):  
Surface Modification ◽  
Electron Microscope ◽  
Reference Material ◽  
Pinus Sylvestris ◽  
Titanium Oxide ◽  
Water Solution ◽  
Comprehensive Approach ◽  
Uv Absorbers ◽  
Wooden Surface ◽  
Wooden Structures

The article deals with durability of wood, durability of wooden structures and surface modification of wood. We are trying to eliminate the factors causing degradation of wood with the use of photocatalytic materials. Those materials are efficient UV absorbers and they are able to destroy biological aggressors also. The planar particles of titanium oxide TiO2 were chosen for the purpose of our research and applied on a wooden surface. In our case, we used a water solution of TiO2. The main goal of our work was to study the interaction between planar particles of TiO2 and wood matter. The samples of pine wood (Pinus sylvestris) were monitored for 255 days and subsequently evaluated using an electron microscope. The use of TiO2 was compared with reference material and a reference commercial coating.

Protection of Wood to against Degradation by TiO2: Scanning Electron Microscopy and Energy Dispersive Spectroscopy

2021 ◽  
Vol 898 ◽  
pp. 87-92
Author(s):  
Zdeněk Prošek ◽  
Petr Svora ◽  
Petr Kuklík
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Electron Microscope ◽  
Reference Material ◽  
Building Industry ◽  
Atmospheric Conditions ◽  
Uv Absorbers ◽  
Wooden Surface ◽  
Wooden Structures ◽  
Scanning Electron

External wooden structures have own place in the building industry for ages. The problem is that wood easily degrades due to UV radiation, atmospheric conditions and biological aggressors. We are trying to eliminate degradable factors by photocatalytic materials (namely titanium oxide). Those materials are efficient UV absorbers and they are able to destroy biological aggressors also. Nowadays, there is no information about the interactions between wooden surface and non-photoactive or photoactive forms of TiO2. TiO2 exists in many morphological forms. The planar particles were chosen for the purpose of our research and applied on a wooden surface. The samples of wood (namely pine) were monitored for 255 days and subsequently evaluated using an electron microscope. The use of TiO2 was compared with reference material and a reference commercial coating.

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.

scholarly journals Surface Modification of Orthodontic Wires with Photocatalytic Titanium Oxide for its Antiadherent and Antibacterial Properties

2007 ◽  
Vol 77 (3) ◽  
pp. 483-488 ◽  
Author(s):  
Mi-Jin Chun ◽  
Eunju Shim ◽  
Eun-Hee Kho ◽  
Keum-Joo Park ◽  
Jarang Jung ◽  
...  
Keyword(s):  
Surface Modification ◽  
Titanium Oxide ◽  
Antibacterial Properties ◽  
Orthodontic Wires

scholarly journals Reference Material (RM) 8820: A New Scanning Electron Microscope Scale Calibration Artifact

2009 ◽  
Vol 15 (S2) ◽  
pp. 668-669
Author(s):  
AE Vladár ◽  
MT Postek
Keyword(s):  
Electron Microscope ◽  
Reference Material ◽  
Scanning Electron Microscope ◽  
Scale Calibration ◽  
Scanning Electron

Extended abstract of a paper presented at Microscopy and Microanalysis 2009 in Richmond, Virginia, USA, July 26 – July 30, 2009

Electron microscope study of the Ti4O7phase in an annealed titanium oxide evaporated film

1981 ◽  
Vol 44 (1) ◽  
pp. 73-90 ◽  
Author(s):  
Kazuhiko Yoshida ◽  
Yukio Yamada ◽  
Heishiro Ota ◽  
L. A. Bursill ◽  
G. J. Wood
Keyword(s):  
Electron Microscope ◽  
Titanium Oxide ◽  
Microscope Study ◽  
Electron Microscope Study

Thermogravimetric Analysis of OMMT Filled HDPE/EPDM Treated EB Irradiation

2012 ◽  
Vol 576 ◽  
pp. 362-365
Author(s):  
N.A. Jamal ◽  
Hazleen Anuar ◽  
Noor Azlina Hassan ◽  
Shamsul Bahri Abdul Razak
Keyword(s):  
Surface Modification ◽  
Thermal Properties ◽  
Electron Microscope ◽  
Transmission Electron Microscope ◽  
High Density Polyethylene ◽  
Absorbed Dose ◽  
Ethylene Propylene Diene Monomer ◽  
Thermal Test ◽  
Transmission Electron ◽  
Organophilic Montmorillonite

In the current study, high density polyethylene (HDPE)/ ethylene propylene diene monomer (EPDM) blend and organophilic montmorillonite (OMMT) filled HDPE/EPDM was develop aiming at enhancing the thermal properties. Maleic anhydride polyethylene (MAPE) agent and electron beam (EB) irradiation technique were applied as HDPE/EPDM blend and OMMT filled HDPE/EPDM treatments. HDPE/EPDM blend and OMMT filled HDPE/EPDM were first prepared via melt intercalation technique at 4 vol% OMMT loading. For EB irradiation technique, the absorbed dose was set at 100 kGy. The effectiveness of these surface modification treatments were compared with control one (no surface modification) and analyzed based on the thermal test as well as transmission electron microscope (TEM). It was found that the thermal properties of both HDPE/EPDM blend and OMMT filled HDPE/EPDM were significantly enhanced by EB irradiation technique as compared to the control and MAPE systems. Transmission electron microscope (TEM) illustrated the mixed intercalated and partial exfoliated structures of OMMT filled HDPE/EPDM with EB irradiation technique.

Study of Mechanical Properties of Magnesium Oxysulfate Whisker/ABS Composites

2010 ◽  
Vol 92 ◽  
pp. 241-246 ◽  
Author(s):  
Yu Zhi Jiang ◽  
Yan Bo Li ◽  
Yue Xin Han ◽  
Wan Zhong Yin
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Surface Modification ◽  
Electron Microscope ◽  
Matrix Interface ◽  
Mass Ratio ◽  
Elongation At Break ◽  
Magnesium Oxysulfate ◽  
Acting Force ◽  
Properties Of Composites

The magnesium oxysulfate whisker/ABS composites were prepared by making the magnesium oxysulfate whisker as dispersed phase.Scaning electron microscope(SEM) was used to test the distribution of whiskers in ABS matrix.Effect of the surface modification and the amount of whiskers to the mechanical properties of composites were studied.The results show that,the surface modification can improve effectively dispersity both itself and in ABS matrix,interface acting force between ABS matrix and whiskers, and mechanical properties of composites ,remarkably.When the mass ratio of whisker to ABS is 40/100,the composite owns the optimum mechanical properties(Tensile strength,elastic modulus,and elongation at break are 67.5Mpa, 7.50Mpa,4.70%,respectively), whiskers distribute uniformly in matrix and improve the dimensioned stability of composites.The reinforcement mechanism of whiskers in ABS was also studied to explain the experimental results.

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