scholarly journals Organic–inorganic hybridization for the synthesis of robust in situ hydrophobic polypropylsilsesquioxane aerogels with fast oil absorption properties

RSC Advances ◽  
2018 ◽  
Vol 8 (11) ◽  
pp. 5695-5701 ◽  
Author(s):  
Ze Wu ◽  
Lei Zhang ◽  
Ji Li ◽  
Xiaolu Zhao ◽  
Chunhui Yang
Keyword(s):  
Sol Gel ◽  
Oil Absorption ◽  
Hybridization Method ◽  
Absorption Properties ◽  
Sol Gel Process

In situ hydrophobic and mechanically robust polypropylsilsesquioxane aerogels (PSAs) were successfully synthesized via an organic–inorganic hybridization method by a 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.

CO2 absorption properties of Ti- and Na-doped porous Li4SiO4 prepared by a sol–gel process

2015 ◽  
Vol 50 (13) ◽  
pp. 4698-4706 ◽  
Author(s):  
Maoqiao Xiang ◽  
Yingchun Zhang ◽  
Ming Hong ◽  
Shuyan Liu ◽  
Yun Zhang ◽  
...  
Keyword(s):  
Sol Gel ◽  
Co2 Absorption ◽  
Absorption Properties ◽  
Sol Gel Process

Preparation of the polymerizable titania oriented to 3D printing and the laser-induced crystallization

2018 ◽  
Vol 24 (9) ◽  
pp. 1421-1427 ◽  
Author(s):  
Feng Liu ◽  
Shaoai Xie ◽  
Yan Wang ◽  
Jianjun Yu ◽  
Qinghua Meng
Keyword(s):  
3D Printing ◽  
Sol Gel ◽  
Crystal Form ◽  
Tetrabutyl Titanate ◽  
Content Type ◽  
Functional Additives ◽  
Sol Gel Process ◽  
Photosensitive Resin ◽  
Induced Crystallization

PurposeThe titania (titanium dioxide) is one of the important functional additives in the photosensitive resin and encounters the problem of stabilization in the photosensitive resin for 3D printing. This study aims to achieve enhancement in stabilization by preparation of the polymerizable titania andin situlaser-induced crystallization during 3D printing.Design/methodology/approachA type of polymerizable titania (AAEM@TiO2) was designed and prepared from tetrabutyl titanate (TBT) and 2-(acetoacetoxy)ethyl methacrylate (AAEM) via the sol–gel process, which was characterized by Fourier-transform infrared (FTIR) spectra, ultraviolet–visible (UV-Vis) spectra, surface bonding efficiency (SBE) and settling height (H). AAEM acted on both bonding to the titania and polymerization with the monomer in resin for stabilization. The polymerizable titania could be converted to the pigmented titania by means of laser-induced crystallization. The photosensitive resin was then formulated on the basis of optimization and used in a stereolithography apparatus (SLA) for 3D printing.FindingsThe stabilization effect of AAEM on TiO2was achieved and the mechanism of competition in the light-consuming reactions during photocuring was proposed. The ratio of nAAEM/nTBTin AAEM@TiO2, the concentration of AAEM@TiO2and photoinitiator (PI) used in the photosensitive resin were optimized. The anatase crystal form was indicated by X-ray diffraction (XRD) and clustering of nanocrystals was revealed by scanning electron microscopy (SEM) after SLA 3D printing.Originality/valueThis investigation provides a novel method of pigmentation by preparation of the polymerizable titania andin situlaser-induced crystallization for SLA 3D printing.

Epoxy resin modified with in situ generated metal oxides by means of sol-gel process

2011 ◽  
Vol 122 (3) ◽  
pp. 1792-1799 ◽  
Author(s):  
Federica Bondioli ◽  
Maria Elena Darecchio ◽  
Adrian S. Luyt ◽  
Massimo Messori
Keyword(s):  
Metal Oxides ◽  
Epoxy Resin ◽  
Sol Gel ◽  
Sol Gel Process

All methacrylate block copolymer/TiO2 nanocomposite via ATRP and in-situ sol-gel process

2020 ◽  
Vol 22 ◽  
pp. 100728
Author(s):  
Minoj Gnanaseelan ◽  
Uddhab Kalita ◽  
Andreas Janke ◽  
Jürgen Pionteck ◽  
Brigitte Voit ◽  
...  
Keyword(s):  
Block Copolymer ◽  
Sol Gel ◽  
Sol Gel Process

In situ silica reinforcement of natural rubber by sol–gel process via rubber solution

2009 ◽  
Vol 52 (2) ◽  
pp. 219-227 ◽  
Author(s):  
Benjawan Chaichua ◽  
Pattarapan Prasassarakich ◽  
Sirilux Poompradub
Keyword(s):  
Natural Rubber ◽  
Sol Gel ◽  
In Situ Silica ◽  
Sol Gel Process

Microwave Absorption Properties of BaFe12O19 Prepared in Different Temperature with Polyaniline Nanocomposites

2017 ◽  
Vol 1142 ◽  
pp. 211-215 ◽  
Author(s):  
Wang Jun Feng ◽  
Xing Zhao ◽  
Wen Qian Zheng ◽  
Jun Tao Gang ◽  
Yue Cao ◽  
...  
Keyword(s):  
Microwave Absorption ◽  
Reflection Loss ◽  
In Situ Polymerization ◽  
Sol Gel ◽  
Ftir Spectra ◽  
Absorption Properties ◽  
Microwave Absorption Properties ◽  
Result Show ◽  
Absorbing Material

The BaFe12O19 nanoparticles was prepared by sol-gel method in different temperature (750°C,850°Cand 950°C), and then BaFe12O19/polyaniline nanocomposites was synthesized by in situ polymerization. The XRD, FTIR spectra, SEM and vector network analyzer were used to analyze the "" chemical component, morphology and microwave absorption property of the nanocomposites. The result show that BaFe12O19 can be generated at 750°C without any impurity ,and its size increased with increase of calcination temperature.BaFe12O19 nanoparticle was coated with polyaniline partially, and we can get it have interaction with polyaniline through FTIR spectra. While the ferrite calcined at 850°C,the thickness of the absorbing material is 4.5mm,the nanocomposites have the largest reflection loss of-17.6 dB at 6 GHz,and its reflection loss values less than−10 dB in the range of 5-7.4GHz.

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