Mechanical, surface, and thermal properties of polyamideimide-polydimethylsiloxane nanocomposites fabricated by sol-gel process

2003 ◽  
Vol 91 (3) ◽  
pp. 1774-1783 ◽  
Author(s):  
Young-Wook Park ◽  
Dong-Sung Lee ◽  
Sang-Hyun Kim
Keyword(s):  
Thermal Properties ◽  
Sol Gel ◽  
Sol Gel Process ◽  
Mechanical Surface

One-pot synthesis of organo-silica hybrids with high thermal properties via a simple sol–gel process

2019 ◽  
Vol 140 (5) ◽  
pp. 2267-2274
Author(s):  
Fatemeh Javanbakht ◽  
Bahareh Razavi ◽  
Mehdi Salami-Kalajahi ◽  
Hossein Roghani-Mamaqani ◽  
Masoud Ommati
Keyword(s):  
Thermal Properties ◽  
Sol Gel ◽  
One Pot ◽  
One Pot Synthesis ◽  
Sol Gel Process ◽  
Silica Hybrids

Morphology, Crystallinity and Thermal Properties of Polyamide 66/Polyoxometalate Nanocomposites Synthesised Via an in situ Sol/Gel Process

2010 ◽  
Vol 212 (2) ◽  
pp. 180-190 ◽  
Author(s):  
Nicolas Cheval ◽  
Fang Xu ◽  
Nabil Gindy ◽  
Richard Brooks ◽  
Yanqiu Zhu ◽  
...  
Keyword(s):  
Thermal Properties ◽  
Sol Gel ◽  
Polyamide 66 ◽  
Sol Gel Process

scholarly journals Thermal Diffusion in Fibrous Aerogel Blankets

Energies ◽  
2020 ◽  
Vol 13 (4) ◽  
pp. 823 ◽  
Author(s):  
Ákos Lakatos ◽  
Anton Trník
Keyword(s):  
Thermal Properties ◽  
Thermal Annealing ◽  
Thermal Insulation ◽  
Sol Gel ◽  
Theoretical Background ◽  
Design Stage ◽  
Scanning Calorimetry ◽  
Insulation Materials ◽  
Sol Gel Process ◽  
Transient Thermal

Nowadays, the usage of thermal insulation materials is widespread not only in the building sector but also in the vehicle industry. The application of fibrous or loose-fill insulation materials like glass wool or mineral wool as well as aerogel is well known. Aerogel-based materials are among the best solid materials for thermal insulation available today; they are prepared through a sol–gel process. For building walls, the glass-fiber-enhanced types are the frequently used ones. They are prepared by adding the liquid–solid solution to the fibrous batting, which is called a sol–gel process. In the present paper, the changes in the most important building physical properties of aerogel blankets after thermal annealing are presented. The samples were subjected to isochronal heat treatments from 70 to 210 °C for 24 h. The changes in the thermal conductivity were followed by Holometrix Lambda heat flow meter, and differential scanning calorimetry results were also recorded. From the measured values, together with the densities, the most important thermal properties were calculated, such as thermal resistance, diffusivity, effusivity (heat absorption), and thermal inertia. In this paper, we attempt to clarify the role played by thermal annealing in the transient thermal properties of aerogel materials. Besides presenting the measurement results, a theoretical background is given. The investigations of not only the steady-state but also the transient thermal parameters of the materials are momentous at the design stage.

PMMA–silica hybrid thin films with enhanced thermal properties prepared via a non-hydrolytic sol–gel process

2008 ◽  
Vol 109 (1) ◽  
pp. 143-147 ◽  
Author(s):  
Xiaomei Song ◽  
Xingxue Wang ◽  
Haitao Wang ◽  
Wei Zhong ◽  
Qiangguo Du
Keyword(s):  
Thin Films ◽  
Thermal Properties ◽  
Sol Gel ◽  
Sol Gel Process ◽  
Hybrid Thin Films ◽  
Silica Hybrid

UV-absorption and thermal properties of Pb-doped glymo/damo-derived coating materials prepared by sol–gel process

2005 ◽  
Vol 40 (21) ◽  
pp. 5779-5782 ◽  
Author(s):  
F. Sayilkan ◽  
M. Asiltürk ◽  
M. G. İçduygu ◽  
H. Sayilkan
Keyword(s):  
Thermal Properties ◽  
Sol Gel ◽  
Uv Absorption ◽  
Coating Materials ◽  
Sol Gel Process

scholarly journals Influence of Textile Structure and Silica Based Finishing on Thermal Insulation Properties of Cotton Fabrics

2016 ◽  
Vol 2016 ◽  
pp. 1-10 ◽  
Author(s):  
G. Rosace ◽  
E. Guido ◽  
C. Colleoni ◽  
G. Barigozzi
Keyword(s):  
Thermal Properties ◽  
Thermal Insulation ◽  
Sol Gel ◽  
Silica Coatings ◽  
Plain Weave ◽  
Weave Fabric ◽  
Sol Gel Process ◽  
Yarn Count ◽  
Ft Ir ◽  
Finishing Agent

The aim of this work is to investigate the influence of weave structures and silica coatings obtained via sol-gel process on the thermal insulation properties of cotton samples. For this reason three main weave structures (plain, satin, and piqué) of cotton fabric were selected with different yarn count, threads per cm, and mass per square meter values. Thereafter, only for the plain weave, the samples were padded using silica sol formed by hydrolysis and subsequent condensation of 3-glycidoxypropyltrimethoxysilane under acidic conditions. The silanized plain weave samples were characterized by TGA and FT-IR techniques. The thermal properties were measured with a home-made apparatus in order to calculate thermal conductivity, resistance, and absorption of all the treated fabric samples. The relationship between the thermal insulation properties of the plain weave fabrics and the concentration of sol solutions has been investigated. Fabrics weave and density were found to strongly influence the thermal properties: piqué always shows the lowest values and satin shows the highest values while plain weave lies in between. The thermal properties of treated high-density cotton plain weave fabric were proved to be strongly influenced by finishing agent concentration.

scholarly journals A Novel Approach to Enhance Mechanical and Thermal Properties of SLA 3D Printed Structure by Incorporation of Metal–Metal Oxide Nanoparticles

Nanomaterials ◽  
2020 ◽  
Vol 10 (2) ◽  
pp. 217 ◽  
Author(s):  
Suhail Mubarak ◽  
Duraisami Dhamodharan ◽  
Manoj B. Kale ◽  
Nidhin Divakaran ◽  
T. Senthil ◽  
...  
Keyword(s):  
Thermal Properties ◽  
Metal Oxide Nanoparticles ◽  
Sol Gel ◽  
Resin Matrix ◽  
Mechanical And Thermal Properties ◽  
Tem Analysis ◽  
Novel Approach ◽  
Metal Metal ◽  
Sol Gel Process ◽  
3D Printed

Silver (Ag) ornamented TiO2 semiconducting nanoparticles were synthesized through the sol-gel process to be utilized as nanofillers with photo resin to enhance the mechanical and thermal properties of stereolithography 3D printed objects. The as-prepared Ag-TiO2 nanoparticles (Ag-TNP) were typified and qualified by XRD, XPS, Raman, and FESEM; TEM analysis dissected the morphologies. The enhancement in the tensile and flexural strengths of SLR/Ag-TNP nanocomposites was noted as 60.8% and 71.8%, respectively, at the loading content of 1.0% w/w Ag-TNP within the SLR (stereolithography resin) matrix. Similarly, the thermal conductivity and thermal stability were observed as higher for SLR/Ag-TNP nanocomposites, equated to neat SLR. The nanoindentation investigation shows an excerpt hike in reduced modulus and hardness by the inclusion of Ag-TNP. The resulted thermal analysis discloses that the introduction of Ag-TNP can appreciably augment the glass transition temperature (Tg), and residual char yield of SLR nanocomposites remarkably. Hence, the significant incorporation of as-prepared Ag-TNP can act as effective nanofillers to enhance the thermal and mechanical properties of photo resin.

scholarly journals Enhanced Mechanical and Thermal Properties of Modified Oil Palm Fiber-Reinforced Polypropylene Composite via Multi-Objective Optimization of In Situ Silica Sol-Gel Synthesis

Polymers ◽  
2021 ◽  
Vol 13 (19) ◽  
pp. 3338
Author(s):  
Nasrullah Mat Rozi ◽  
Hamidah Abdul Hamid ◽  
Md. Sohrab Hossain ◽  
Nor Afifah Khalil ◽  
Ahmad Naim Ahmad Yahaya ◽  
...  
Keyword(s):  
Thermal Properties ◽  
Oil Palm ◽  
Sol Gel ◽  
Silica Sol ◽  
Mechanical And Thermal Properties ◽  
Fiber Reinforced ◽  
Palm Fiber ◽  
In Situ Silica ◽  
Sol Gel Process

A multi-objective optimization of in situ sol-gel process was conducted in preparing oil palm fiber-reinforced polypropylene (OPF-PP) composite for an enhancement of mechanical and thermal properties. Tetraethyl orthosilicate (TEOS) and butylamine were used as precursors and catalysts for the sol-gel process. The face-centered central composite design (FCCD) experiments coupled with response surface methodology (RSM) has been utilized to optimize in situ silica sol-gel process. The optimization process showed that the drying time after the in-situ silica sol-gel process was the most influential factor on silica content, while the molar ratio of TEOS to water gave the most significant effect on silica residue. The maximum silica content of 34.1% and the silica residue of 35.9% were achieved under optimum conditions of 21.3 h soaking time, 50 min drying time, pH value of 9.26, and 1:4 molar ratio of TEOS to water. The untreated oil palm fiber (OPF) and silica sol-gel modified OPF (SiO2-OPF) were used as the reinforcing fibers, with PP as a matrix and maleic anhydride grafted polypropylene (MAgPP) as a compatibilizer for the fiber-reinforced PP matrix (SiO2-OPF-PP-MAgPP) composites preparation. The mechanical and thermal properties of OPF-PP, SiO2-OPF-PP, SiO2-OPF-PP-MAgPP composites, and pure PP were determined. It was found that the OPF-S-PP-MAgPP composite had the highest toughness and stiffness with values of tensile strength, Young’s modulus, and elongation at break of 30.9 MPa, 881.8 MPa, and 15.1%, respectively. The thermal properties analyses revealed that the OPF-S-PP-MAgPP exhibited the highest thermally stable inflection point at 477 °C as compared to pure PP and other composites formulations. The finding of the present study showed that the SiO2-OPF had the potential to use as a reinforcing agent to enhance the thermal-mechanical properties of the composites.

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