Study on microscopic mechanism of nano-silicon dioxide for improving mechanical properties of polypropylene

2020 ◽  
Vol 46 (6) ◽  
pp. 468-475
Author(s):  
Shengkun Wei ◽  
Xu Li ◽  
Yin Shen ◽  
Liangyong Zhang ◽  
Xuelian Wu
Keyword(s):  
Mechanical Properties ◽  
Silicon Dioxide ◽  
Microscopic Mechanism ◽  
Nano Silicon

scholarly journals Effect of Nano-additive on the Bonding Strength and Formaldehyde Emission of the Plywood Adhesive during Manufacturing of Wood Based Panel Products

2020 ◽  
Vol 10 (2) ◽  
pp. 158-161
Author(s):  
S.C. Sahoo ◽  
Amitava Sil ◽  
Dharm Pal
Keyword(s):  
Mechanical Properties ◽  
Shear Strength ◽  
Calcium Carbonate ◽  
Silicon Dioxide ◽  
Formaldehyde Emission ◽  
Adhesive Properties ◽  
Nano Technology ◽  
Panel Products ◽  
Amino Resin ◽  
Nano Silicon

Nano science and nano technology provides numerous opportunities for enhancing the properties of wood based panel products. In this study an extender was made using nano silicon dioxide ( Sio2), nano calcium carbonate( CaCo3) with some specialty chemicals at a certain reciprocal proportion. Efficacy study was carried out with both phenolic and amino resin in terms of rheological and formaldehyde emission test using reinforcement of nano additive as extender at different concentration level. The plywood panels has been tested as per IS: 1734-1983 for mechanical properties. The rheological and adhesive properties has been tested as per IS 848: 2006. The test data reveals that enhancement of rheological, bonding and mechanical properties have been achieved after reinforcement of synthetic resin. The increase in the percentage of nano-additive caused an increase of viscosity, glue shear strength and minimizing the formaldehyde emission than using individual nano silicon dioxide ( Sio2), nano calcium carbonate( CaCO3) instead of the extender made by combination of above. Using nano additive extender at 5%, there is an increase in glue shear strength in the glue line and enhanced rheological properties in amino resin based adhesive was observed.

Effects of nano-silicon dioxide surface modification on the morphology and mechanical properties of ABS/PMMA blends

2018 ◽  
Vol 38 (7) ◽  
pp. 617-623
Author(s):  
Jin Ding ◽  
Zhenming Yue ◽  
Jiao Sun ◽  
Jun Gao
Keyword(s):  
Mechanical Properties ◽  
Silicon Dioxide ◽  
Acid Treatment ◽  
Acrylonitrile Butadiene Styrene ◽  
Ternary Blends ◽  
Silane Coupling ◽  
Nano Silicon ◽  
Pmma Blends ◽  
Morphology And Mechanical Properties ◽  
Butadiene Styrene

Abstract This work analyzed the effects of nano-silicon dioxide (nano-SiO2) fillers on the morphology and mechanical properties of acrylonitrile-butadiene-styrene (ABS)/poly(methyl methacrylate) (PMMA) blends. Nano-SiO2 particles were selectively dispersed in the PMMA phase, and the toughness of the ternary blends was significantly improved when the contents of the nano-SiO2 fillers were below 2 wt%. The stearic acid treatment of nano-SiO2 particles prevented the adhesion between constituents and markedly diminished the toughness of the blends. Nano-SiO2 particles were alternatively treated with a silane coupling agent to promote adhesion. The toughness was better in blends for filler contents below 2 wt% than in pure nano-SiO2 particles. However, the presence of nano-SiO2 fillers decreased the surface glossiness of the blends. This work provides new insights into the processes by which nanomaterials toughen ABS/PMMA blends.

scholarly journals Mechanical behavior of frozen soil improved with sulphoaluminate cement and its microscopic mechanism

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Zhenhua Yin ◽  
Hu Zhang ◽  
Jianming Zhang ◽  
Mingtang Chai
Keyword(s):  
Mechanical Properties ◽  
Mechanical Behavior ◽  
Soil Improvement ◽  
Particle Size Analysis ◽  
Frozen Soil ◽  
Size Analysis ◽  
Permafrost Soil ◽  
Compression Tests ◽  
Microscopic Mechanism ◽  
Sulphoaluminate Cement

Abstract The foundation of constructions built in the permafrost areas undergo considerable creeping or thawing deformation because of the underlying ice-rich permafrost. Soil improvement may be of advantage in treating ice-rich permafrost at shallow depth. Sulphoaluminate cement was a potential material to improve frozen soil. Simultaneously, two other cements, ordinary Portland cement and Magnesium phosphate cement were selected as the comparison. The mechanical behavior of modified frozen soil was studied with thaw compression tests and unconfined compression strength tests. Meanwhile, the microscopic mechanism was explored by field emission scanning electron microscopy, particle size analysis and X-ray diffractometry. The results showed Sulphoaluminate cement was useful in reducing the thaw compression deformation and in enhancing the strength of the frozen soil. The improvement of the mechanical behavior depended mainly on two aspects: the formation of structural mineral crystals and the agglomeration of soil particles. The two main factors contributed to the improvement of mechanical properties simultaneously. The thicker AFt crystals result in a higher strength and AFt plays an important role in improving the mechanical properties of frozen soils.The study verified that Sulphoaluminate cement was an excellent stabilizer to improve ice-rich frozen soils.

Rice Husks - Structure, Composition and Possibility of Use them at Surface Treatment

2016 ◽  
Vol 844 ◽  
pp. 153-156 ◽  
Author(s):  
Mateusz Fijalkowski ◽  
Kinga Adach ◽  
Aleš Petráň ◽  
Dora Kroisová
Keyword(s):  
Mechanical Properties ◽  
Silicon Dioxide ◽  
Epoxy Resin ◽  
Mechanical Stability ◽  
Rice Husks ◽  
Cellulose Fibres ◽  
Plant Parts ◽  
Sodium Magnesium ◽  
Excellent Adhesion ◽  
Individual Nanoparticles

Rice husks (RH) are characterized by a high content of silicon dioxide up to 23 wt. %. Silica in the form of nanoparticles creates surface layers formed in various plant parts which ensure protective properties and mechanical stability. These nanoparticles with a dimension in the range of tens of nanometers, are formed during biochemical processes and photosynthesis. Individual nanoparticles are interconnected between themselves and between layers with organic phase via cellulose fibres. Accompanying ions mainly potassium, calcium, sodium, magnesium and aluminium extremely important for plant growth have also been identified in rice husks. In this research paper we investigated mechanical properties of composite epoxy resin material, which was composed of ChS Epoxy 520 filled with silica obtained from rice husks. Nanoparticles of silicon dioxide with the size in dozen of nanometers were prepared by calcination of raw plant parts. We found that the 0.1 phr of filling (0.01 g of filler + 10 g of epoxy) demonstrated a significant increase of wear resistance and decrease of coefficient of friction. An excellent adhesion between epoxy resin and silica nanoparticles was also observed. The silicon dioxide in epoxy resin plays the role of the hard phase, which transfers part of the load and protects the surface of polymer against wear. The presence of this filler does not change the mechanical properties of the original resin.

scholarly journals Treatment of nylon garment to improve its proper-ties

2017 ◽  
Vol 6 (3) ◽  
pp. 36
Author(s):  
Ghada Abdalla Lotfy Elkholy
Keyword(s):  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Silicon Dioxide ◽  
Functional Properties ◽  
Effect Of Treatment ◽  
Nano Silicon ◽  
Textile Industries ◽  
Scanning Electron

Nanotechnology is extensively used in textile industries because it confers unique properties on fabrics.In this study, using nano silicon dioxide (SiO2)-coated nylon fabrics have created a lot of awareness appropriate to improve their functional properties. Using deferent con-struction of nano silicon dioxide (SiO2), the optimization construction are used to carry out treatments impart to improve the roughness, antistatic charge, sew ability, thickness; weight and UPF measurement are investigated. The study evaluates the possibility of using the scanning electron microscope (SEM) to show optimize the effect of treatment of nylon fabrics with nano silicon dioxide not only on the effect of treatment of nylon fabrics with nano silicon dioxide not only on their performance and appearance but also in garment man-ufacturing.

Silicon dioxide@graphene oxide-graft-poly(γ-benzyl-l-glutamate) as an advanced hybrid nanofiller reinforces poly(l-lactide)

RSC Advances ◽  
2016 ◽  
Vol 6 (7) ◽  
pp. 5688-5694 ◽  
Author(s):  
Pei-Yao Guo-Wang ◽  
Jian-Xun Ding ◽  
Wei Guo ◽  
Hui-Yong Wu ◽  
Jun-Chao Wei ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Graphene Oxide ◽  
Silicon Dioxide ◽  
Organic Phase

A novel poly(γ-benzyl-l-glutamate) (PBLG)-modified SiO2@graphene oxide nanofiller (SiO2@GO-g-PBLG) was prepared. The hybrid nanofiller can maintain stable in organic phase, and greatly enhance the mechanical properties of poly(l-lactide).

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