scholarly journals Embedded polyhedral SiO2/castor oil-based WPU shell-core hybrid coating via self-assembly sol-gel process

2020 ◽  
Vol 141 ◽  
pp. 105540
Author(s):  
Linlong Meng ◽  
Haoxin Zhu ◽  
Bing Feng ◽  
Zhenhua Gao ◽  
Di Wang ◽  
...  
Keyword(s):  
Self Assembly ◽  
Castor Oil ◽  
Sol Gel ◽  
Hybrid Coating ◽  
Sol Gel Process

Synthesis and Intermolecularly Mediated Assembly of Organic Pigment in Hybrid Coating Films

1998 ◽  
Vol 519 ◽  
Author(s):  
Y. Yan ◽  
Z. Duan ◽  
D.-G. Chen ◽  
S. Ray Chaudhuri
Keyword(s):  
Sol Gel ◽  
Hybrid Coating ◽  
Hypsochromic Shift ◽  
Hybrid Films ◽  
Coating Films ◽  
Organic Pigment ◽  
Inorganic Hybrid ◽  
Matrix Interactions ◽  
Sol Gel Process

AbstractThe insoluble, strongly hydrogen bonded organic pigment of 3,6-bis-(4-chlorphenyl)-l,4- diketopyrrolo [3,4-c] pyrrole was transiently blocked by adding carbamate groups, and consequently incorporated into organic-inorganic hybrid matrices by a sol-gel process. The homo- (pigment-pigment) and hetero-intermolecular (pigment-matrix) interactions were found to control both the assembly and dispersion of pigment molecules in the hybrid coating films. A weaker interaction between matrices and pigment molecules results in aggregation of the carbamate pigment in the methyl-silicate films. A stronger interaction forms a homogenous dispersion and coloration of the phenyl-silicate films. The as-prepared methyl- and phenylsilicate films doped with the organic pigment were distinguished by a morphology change and a blue (hypsochromic) shift in absorption from 550 to 460 nm. Thermal treatment can remove the carbamate groups and in-situ form the organic pigment in the hybrid films.

Template-Free Synthesis of Ellipsoidal Silica Nanoparticles

2012 ◽  
Vol 1386 ◽  
Author(s):  
Henan Zhang ◽  
Daniel L. Akins
Keyword(s):  
Surface Tension ◽  
Self Assembly ◽  
Sol Gel ◽  
The Self ◽  
Micellar System ◽  
Synthesis Conditions ◽  
Spherical Silica ◽  
Sol Gel Process ◽  
Spherical Silica Particles ◽  
Template Free

ABSTRACTFor a sol-gel process occurring in a water/oil (w/o) system, the self-assembly of silica nuclei can be controlled by close control of synthesis conditions. We have synthesized ellipsoidal or spherical silica particles by a template-free scheme that involves controlling surface tension on silica nuclei through via use of different volume ratios of a w/o micellar system.

Recyclable (Fe3O4-NaYF4:Yb,Tm)@TiO2 nanocomposites with near-infrared enhanced photocatalytic activity

2018 ◽  
Vol 47 (5) ◽  
pp. 1666-1673 ◽  
Author(s):  
Yan Lv ◽  
Lin Yue ◽  
Qian Li ◽  
Baoyi Shao ◽  
Sen Zhao ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Self Assembly ◽  
Near Infrared ◽  
Sol Gel ◽  
Design And Synthesis ◽  
Sol Gel Process

Herein, the design and synthesis of a multifunctional (Fe3O4-NaYF4:Yb,Tm)@TiO2 photocatalyst through a facile sol–gel process combined with electrostatic self-assembly has been reported.

Controlled synthesis of V2O5/MWCNT core/shell hybrid aerogels through a mixed growth and self-assembly methodology for supercapacitors with high capacitance and ultralong cycle life

2015 ◽  
Vol 3 (30) ◽  
pp. 15692-15699 ◽  
Author(s):  
Yingjie Wu ◽  
Guohua Gao ◽  
Huiyu Yang ◽  
Wenchao Bi ◽  
Xing Liang ◽  
...  
Keyword(s):  
Self Assembly ◽  
Sol Gel ◽  
Three Dimensional ◽  
Cycle Life ◽  
Core Shell ◽  
Controlled Synthesis ◽  
One Pot ◽  
High Capacitance ◽  
Sol Gel Process ◽  
Hybrid Aerogels

Three-dimensional V2O5/MWCNT core/shell hybrid aerogels were controllably synthesized through a mixed growth and self-assembly methodology in a one-pot sol–gel process.

scholarly journals Insulating Thermal and Water-Resistant Hybrid Coating for Fabrics

Coatings ◽  
2020 ◽  
Vol 10 (1) ◽  
pp. 72 ◽  
Author(s):  
Simona Ortelli ◽  
Anna Luisa Costa
Keyword(s):  
Thermal Stability ◽  
Sol Gel ◽  
Hybrid Coating ◽  
Inorganic Hybrid ◽  
Tio2 Nps ◽  
Nonwoven Fabrics ◽  
Burn Out ◽  
Sol Gel Process ◽  
Coated Fabrics

Organic–inorganic hybrid (ceramer) coatings were synthesized and deposited on the polyester nonwoven fabrics through the sol–gel process. This promoted the formation of an insulating barrier that was able to enhance the thermal stability and the hydrophobicity of fabrics. The hybrid phase is made of an organic network arising from different alkoxysilane precursors (trimethoxymethylalkoxysilane (TMEOS), 3-aminopropyl-trimethoxyalkoxysilane (APTMS), and tetraethylorthosilicate (TEOS)) and inorganic phase made of titanium dioxide TiO2 nanoparticles (NPs) and, in some cases, coated by P-based compound. The characterization of hybrid phase at liquid (size distribution and zeta potential of dispersed nanoparticles), dried state (crystalline phase, thermogravimetric (TGA), and Fourier transform infrared spectroscopic (FTIR) analyses), and on deposited coatings (contact angle, burn-out tests) aimed to find a correlation between the physicochemical properties of ceramer and functional performances of coated fabrics (thermal stability and hydrophobicity). The results showed that all ceramer formulations were able to improve the char formation after burn-out, in particular the highest thermal stability was obtained in the presence of TMEOS precursor and TiO2 NPs coated by P-based compound, which also provided the highest hydrophobicity. In conclusion, we presented an environmentally friendly and easily scalable process for the preparation of ceramer formulations capable of being formed into transparent, thermal-resistant, and hydrophobic fabric coatings, whose functions are extremely challenging for the textile market.

Characterization of Medium-range Order in Self-Assembled Organic-inorganic Hybrid by Fluctuation X-ray Microscopy

2006 ◽  
Vol 960 ◽  
Author(s):  
Lixin Fan ◽  
David Paterson ◽  
Ian McNulty ◽  
M. M. J. Treacy ◽  
Dushyant Kumar ◽  
...  
Keyword(s):  
Self Assembly ◽  
Sol Gel ◽  
Range Order ◽  
Inorganic Materials ◽  
Medium Range Order ◽  
X Ray ◽  
Sol Gel Process ◽  
Medium Range ◽  
Self Assembled

ABSTRACTThe control of formation and ordering of self assembled nanostructures, with medium- to long-range order, is a challenge that limits advances in many fields of nanotechnology. We have developed a technique, which we call fluctuation x-ray microscopy, that offers quantitative insight into medium-range correlations in disordered materials at nanometer- and larger-length scales. We examined the influence of sol-gel process variables on medium range order in PI-b-PEO/ aluminosilicate bulk using this technique. The nano-structuring of inorganic materials was directed by polymer self-assembly. The medium range correlation between the nanostructures in two hybrids was quantitatively examined and compared.

Sign in / Sign up

Export Citation Format

Share Document