scholarly journals Interfacial Hydrogen Bonds and Their Influence Mechanism on Increasing the Thermal Stability of Nano-SiO2-Modified Meta-Aramid Fibres

Polymers ◽  
2017 ◽  
Vol 9 (12) ◽  
pp. 504 ◽  
Author(s):  
Chao Tang ◽  
Xu Li ◽  
Zhiwei Li ◽  
Jian Hao
Keyword(s):  
Thermal Stability ◽  
Hydrogen Bonds ◽  
Nano Sio2 ◽  
Influence Mechanism ◽  
Aramid Fibres ◽  
Thermal Stability Of

Improved thermal stability of phenolic resin by graphene-encapsulated nano-SiO2 hybrids

2018 ◽  
Vol 135 (4) ◽  
pp. 2377-2387 ◽  
Author(s):  
Juan Chen ◽  
Wenbo Zhang ◽  
Jing Liu ◽  
Heyi Ge ◽  
Moufeng Tian ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Phenolic Resin ◽  
Nano Sio2 ◽  
Thermal Stability Of

scholarly journals Thermal stability of imidazolium-based ionic liquids

2016 ◽  
Vol 4 (1) ◽  
pp. 51-64 ◽  
Author(s):  
Léa Chancelier ◽  
Olivier Boyron ◽  
Thibaut Gutel ◽  
Catherine Santini
Keyword(s):  
Thermal Stability ◽  
Ionic Liquids ◽  
Hydrogen Bonds ◽  
Alkyl Chain ◽  
Alkyl Chain Length ◽  
Van Der Waals Interactions ◽  
Alkyl Chains ◽  
Coulombic Interactions ◽  
The Impact ◽  
Thermal Stability Of

This work highlights the factors tuning the thermal stability of imidazolium-based ionic liquids (IL) associated to bis(trifluoromethanesulfonyl)imide anion [NTf2]. The decomposition temperatures (Td) were evaluated by thermogravimetric analyses (TGA) with optimized parameters to obtain reproducible Td. The impact of the alkyl chain length and of the presence of functional groups and unsaturations on Td were evaluated. The thermal behaviour was governed by Van der Waals interactions between alkyl chains, and by inter and intra coulombic interactions such as hydrogen bonds.

Crystal Structure, Thermoanalytical Properties and Infrared Spectra of Double Magnesium Selenates

1996 ◽  
Vol 61 (9) ◽  
pp. 1295-1306 ◽  
Author(s):  
Zdeněk Mička ◽  
Lucie Prokopová ◽  
Ivana Císařová ◽  
David Havlíček
Keyword(s):  
Crystal Structure ◽  
Thermal Stability ◽  
Hydrogen Bonds ◽  
X Ray Diffraction ◽  
X Ray ◽  
Double Salts ◽  
Hydrogen Bond System ◽  
Bond System ◽  
Thermoanalytical Studies ◽  
Thermal Stability Of

Magnesium selenates double salts K2Mg(SeO4)2.6H2O, Rb2Mg(SeO4)2.6H2O, Cs2Mg(SeO4)2.6H2O, and (NH4)2Mg(SeO4)2.6H2O have been studied by means of X-ray diffraction methods, thermoanalytical methods, and infrared spectroscopy. The basic building units of these compounds are slightly deformed tetrahedra of selenate anions and octahedra of hexaaquamagnesium(II) cations interconnected by a system of hydrogen bonds. The investigation of IR spectra has been used in the discussion of X-ray diffraction results in the field of description of the hydrogen bond system and deformation of the basic polyhedra of selenate anion and hexaaquamagnesium cation. The thermoanalytical studies are used in evaluating the effects of hydrogen bonds and polarization influence of M+ cations on thermal stability of the compounds studied.

Epoxy Resin (EP) / Nano-SiO2 Composite Material Preparation by Two Processes

2013 ◽  
Vol 652-654 ◽  
pp. 127-130
Author(s):  
Ying Na Zhao ◽  
Xiong Feng Zeng ◽  
Wen Li Zhang
Keyword(s):  
Thermal Stability ◽  
Composite Material ◽  
Comprehensive Evaluation ◽  
Sol Gel ◽  
Curing Agent ◽  
Spectra Analysis ◽  
Nano Sio2 ◽  
Ep Matrix ◽  
Material Preparation ◽  
Thermal Stability Of

Ultrasonic wave (UW) and sol-gel (SG) technology were using to preprocess the nano-SiO2, and the SiO2/EP composites were prepared by adding coupling agent KH-550, curing agent T-31 and different contents SiO2 into EP matrix. Using infrared spectra analysis tested the samples’ structures and the thermal stability of two preparation processes were tested by TG. The results indicated that, the thermal stability of the SiO2/EP composites by UW preprocess was improved about 25 oC -60 oC when compared with pure EP and the SiO2/EP composites by SG. Comparing to the comprehensive evaluation of thermal stability of different SiO2 contents SiO2/EP composites, the most optimum additive of nano-SiO2 was about 10 wt. % by UW process.

scholarly journals Paraffin Pickering Emulsion Stabilized with Nano-SiO2 Designed for Wood Impregnation

Forests ◽  
2020 ◽  
Vol 11 (7) ◽  
pp. 726
Author(s):  
Runhao Liu ◽  
Xinyao Liu ◽  
Yuting Zhang ◽  
Junjia Liu ◽  
Chengxi Gong ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Water Resistance ◽  
Storage Stability ◽  
Treated Wood ◽  
High Water ◽  
Pickering Emulsion ◽  
Special Equipment ◽  
Nano Sio2 ◽  
Wood Impregnation ◽  
Thermal Stability Of

Wax impregnation is an effective approach to improve wood water resistance. However, melted waxes require special equipment and cannot penetrate deep enough into wood. Recently, wax emulsions show excellent efficiency in wood modification. In this study, paraffin Pickering emulsion stabilized by low dispersed SiO2 nanospheres was used to impregnate poplar wood. The microstructure and storage stability of the emulsion were evaluated. The dimensional stability, water uptake, wettability, and thermal stability of treated wood were also investigated. After homogenization, a milk-white oil-in-water (O/W) paraffin Pickering emulsion stabilized by the nano-SiO2 (diameter of ~76 nm) was formed and demonstrated excellent storage stability. Paraffin Pickering emulsion could penetrate into the wood structure. The emulsion-treated wood was endowed with a moderate anti-swelling efficiency (ASE), high water resistance, and low wettability. Moreover, the addition of nano-SiO2 could improve the thermal stability of the treated wood.

scholarly journals Hydrogen bonds are related to the thermal stability of 16S rRNA

2013 ◽  
Vol 06 (01) ◽  
pp. 19-24 ◽  
Author(s):  
Hiroshi Nakashima ◽  
Ai Fukuoka ◽  
Yuka Saitou
Keyword(s):  
Thermal Stability ◽  
Hydrogen Bonds ◽  
16S Rrna ◽  
Thermal Stability Of
Sign in / Sign up

Export Citation Format

Share Document