Thermally and mechanically enhanced epoxy resin-silica hybrid materials containing primary amine-modified silica nanoparticles

2008 ◽  
Vol 108 (3) ◽  
pp. 1629-1635 ◽  
Author(s):  
Kung-Chin Chang ◽  
Chang-Yu Lin ◽  
Hui-Fen Lin ◽  
Sheng-Che Chiou ◽  
Wan-Chun Huang ◽  
...  
Keyword(s):  
Epoxy Resin ◽  
Silica Nanoparticles ◽  
Hybrid Materials ◽  
Primary Amine ◽  
Modified Silica ◽  
Modified Silica Nanoparticles ◽  
Silica Hybrid

Effect of Amino-Modified Silica Nanoparticles on the Corrosion Protection Properties of Epoxy Resin-Silica Hybrid Materials

2008 ◽  
Vol 8 (6) ◽  
pp. 3040-3049 ◽  
Author(s):  
Kung-Chin Chang ◽  
Hui-Fen Lin ◽  
Chang-Yu Lin ◽  
Tai-Hung Kuo ◽  
Hsin-Hua Huang ◽  
...  
Keyword(s):  
Epoxy Resin ◽  
Corrosion Protection ◽  
Hybrid Materials ◽  
Sol Gel ◽  
Covalent Bond ◽  
Surface Hydrophobicity ◽  
Hybrid Coatings ◽  
Morphological Observation ◽  
Modified Silica ◽  
Silica Hybrid

In this paper, a series of organic–inorganic hybrid materials consisting of epoxy resin frameworks and dispersed nanoparticles of amino-modified silica (AMS) were successfully prepared. First of all, the AMS nanoparticles were synthesized by carrying out the conventional acid-catalyzed sol–gel reactions of tetraethyl orthosilicate (TEOS) in the presence of (3-aminopropyl)-trimethoxysilane (APTES) molecules. The as-prepared AMS nanoparticles were then characterized by FTIR, 13C-NMR and 29Si-NMR spectroscopy. Subsequently, a series of hybrid materials were prepared by performing in-situ thermal ring-opening polymerization reactions of epoxy resin in the presence of as-prepared AMS nanoparticles and raw silica (RS) particles. The as-prepared epoxy-silica hybrid materials with AMS nanoparticles were found to show better dispersion capability than that of RS particles existed in hybrid materials based on the morphological observation of transmission electron microscopy (TEM). The hybrid materials containing AMS nanoparticles in the form of coating on cold-rolled steel (CRS) were found to be much superior in corrosion protection over those of hybrid materials with RS particles when tested by a series of electrochemical measurements of potentiodynamic and impedance spectroscopy in 5 wt% aqueous NaCl electrolyte. The increase of corrosion protection effect of hybrid coatings may have probably resulted from the enhancement of the adhesion strength of the hybrid coatings on CRS coupons, which may be attributed to the formation of Fe—O—Si covalent bond at the interface of coating/CRS system based on the FTIR-RAS (reflection absorption spectroscopy) studies. The better dispersion capability of AMS nanoparticles in hybrid materials were found to lead more effectively enhanced molecular barrier property, mechanical strength, surface hydrophobicity and optical clarity as compared to that of RS particles, in the form of coating and membrane, based on the measurements of molecular permeability analysis, dynamic mechanical analysis, contact angle measurements and ultraviolet-visible transmission spectra, respectively.

Sodium Chloride Modified Silica Nanoparticles as a Non-Viral Vector with a High Efficiency of DNA Transfer into Cells

2003 ◽  
Vol 3 (3) ◽  
pp. 273-279 ◽  
Author(s):  
Yuxiang Chen ◽  
Zhigang Xue ◽  
Duo Zheng ◽  
Kun Xia ◽  
Yanzhong Zhao ◽  
...  
Keyword(s):  
Sodium Chloride ◽  
Silica Nanoparticles ◽  
High Efficiency ◽  
Viral Vector ◽  
Dna Transfer ◽  
Modified Silica ◽  
Modified Silica Nanoparticles

Cationic chitosan‐modified silica nanoparticles for oral delivery of protein vaccine

2021 ◽  
Author(s):  
Xi Wu ◽  
Muhammad Asim Farooq ◽  
Tiantian Li ◽  
Tianjiao Geng ◽  
Perpeuta Takunda Kutoka ◽  
...  
Keyword(s):  
Silica Nanoparticles ◽  
Oral Delivery ◽  
Protein Vaccine ◽  
Modified Silica ◽  
Modified Silica Nanoparticles

One-pot synthesis and application of novel amino-functionalized silica nanoparticles using guanidine as amino group

2016 ◽  
Vol 40 (10) ◽  
pp. 8444-8450 ◽  
Author(s):  
Feng Guodong ◽  
Guan Mingming ◽  
Lai Qi ◽  
Mi Hongyu ◽  
Li Guanghua ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Silica Nanoparticles ◽  
Amino Group ◽  
Functionalized Silica ◽  
Henry Reaction ◽  
Modified Silica ◽  
One Pot ◽  
One Pot Synthesis ◽  
Modified Silica Nanoparticles ◽  
Functionalized Silica Nanoparticles

The preparation of modified silica nanoparticles with guanidine was developed and used to catalyze the Henry reaction and fix quantum dots.

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