Diamine Immobilization on Silica Gel through the Sol−Gel Process and Increase in the Organic Chain by Using Glutaraldehyde followed by Ethylenediamine

Langmuir ◽  
1997 ◽  
Vol 13 (10) ◽  
pp. 2681-2686 ◽  
Author(s):  
Antonio R. Cestari ◽  
Claudio Airoldi
Keyword(s):  
Silica Gel ◽  
Sol Gel ◽  
Sol Gel Process

scholarly journals Resistance to Growth of Molds for Wood Modified with Hydrophobic Hybrid Silica Gel Containing Copper Amine Complexes

Materials ◽  
2021 ◽  
Vol 14 (3) ◽  
pp. 577
Author(s):  
Shaokun Hao ◽  
Chuanshuang Hu ◽  
Xiuyi Lin ◽  
Jin Gu ◽  
Hong Yun ◽  
...  
Keyword(s):  
Silica Gel ◽  
High Efficiency ◽  
Copper Chloride ◽  
Sol Gel ◽  
Untreated Wood ◽  
Populus Tomentosa ◽  
Amine Complexes ◽  
Hybrid Silica ◽  
Sol Gel Process ◽  
Copper Amine

Complexation copper with amine provides an effective strategy for fixation copper in wood, while hydrophobic modification improves the dimensional stability of wood. Thus, a combination of complexation and hydrophobization is expected to enhance the efficiency of copper-based biocides. In this study, hydrophobic hybrid silica gel containing copper amine complexes (MACu) was prepared through an in situ sol-gel process in wood using methyltriethoxysilane (MTES), 3-amino-propyltriethoxysilane (APTES), and copper chloride. The resistance to growth of molds for MACu modified wood (Populus tomentosa) was measured according to ASTM D3273-16. A leaching resistance test was carried out in accordance with AWPA E11-16. The results showed that only Aspergillus niger covered the surface of untreated wood blocks and no mold grew on the MACu surface even after the leaching test. MACu xerogel and MACu wood were further characterized by SEM-EDS, FTIR, and XPS. A possible schematic diagram of the reaction mechanism was proposed to explain the high-efficiency anti-mold performance of MACu wood.

Immobilization of a Quinonoid Rhodium Catalyst on Silica Gel by the Surface Sol−Gel Process and Catalytic Activity for Phenylacetylene Polymerization

2009 ◽  
Vol 28 (10) ◽  
pp. 3000-3003 ◽  
Author(s):  
Sang Bok Kim ◽  
Chen Cai ◽  
William C. Trenkle ◽  
Dwight A. Sweigart
Keyword(s):  
Catalytic Activity ◽  
Silica Gel ◽  
Sol Gel ◽  
Rhodium Catalyst ◽  
Sol Gel Process

Incorporation of Polyaniline Into a Silica Gel Via the Sol-Gel Technique

1990 ◽  
Vol 180 ◽  
Author(s):  
F. Nishida ◽  
B. Dunn ◽  
E.T. Knobbe ◽  
P.D. Fuqua ◽  
R.B. Kaner ◽  
...  
Keyword(s):  
Silica Gel ◽  
Conjugated Polymer ◽  
Sol Gel ◽  
Optical Quality ◽  
Emeraldine Base ◽  
Polar Solvents ◽  
Base Form ◽  
Sol Gel Process ◽  
Gel Technique ◽  
Good Optical Quality

ABSTRACTThe sol-gel process has been used to incorporate a conjugated polymer, polyaniline, in silica gel. The emeraldine base form of the polymer is partially solubility in aprotic polar solvents which are compatible with the sol. The effect of sol environment on the emeraldine base form of polyaniline was investigated. The soluble emeraldine base form is maintained at pH ≥ 2.4 enabling good optical quality gels to be synthesized. The type of alkoxysilane and the water ratio used in preparing the sol influence the solubility of the emeraldine base.

Preparation of C70-Doped Solid Silica Gel via Sol-Gel Process

1992 ◽  
Vol 75 (10) ◽  
pp. 2865-2866 ◽  
Author(s):  
Sheng Dai ◽  
Robert N. Compton ◽  
Jack P. Young ◽  
Gleb Mamantov
Keyword(s):  
Silica Gel ◽  
Sol Gel ◽  
Sol Gel Process

Modification of Silica Gel by Nanosilica

2016 ◽  
Vol 714 ◽  
pp. 35-39
Author(s):  
Adéla Peterová ◽  
Petr Kotlík
Keyword(s):  
Crack Propagation ◽  
Silica Nanoparticles ◽  
Internal Stress ◽  
Silica Gel ◽  
Time Domain ◽  
Building Materials ◽  
Sol Gel ◽  
Silica Gels ◽  
Laboratory Conditions ◽  
Sol Gel Process

Consolidants based on silica gel have been widely used for the consolidation of decaying monuments. Consolidants reinforce building materials by replacing cement that has decayed. However, silica gels are formed by polycondensation, during which process they shrink and may crack from the internal tension. Therefore, their lifetime is limited and the building materials have to be treated time and time again. In this study, we investigate whether silica nanoparticles are able to absorb the internal stress caused by gel solidification and, thereby, prevent crack propagation. We carried out a time domain study of the sol-gel process under a stable laboratory conditions.

Bioactive poly(2-hydroxyethylmethacrylate)/silica gel hybrid nanocomposites prepared by sol-gel process

2008 ◽  
Vol 86B (1) ◽  
pp. 98-104 ◽  
Author(s):  
A. Costantini ◽  
G. Luciani ◽  
B. Silvestri ◽  
F. Tescione ◽  
F. Branda
Keyword(s):  
Silica Gel ◽  
Sol Gel ◽  
Hybrid Nanocomposites ◽  
Sol Gel Process
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