Effects of silane coupling agent modifications of hollow glass microspheres on syntactic foams with epoxy matrix

2021 ◽  
pp. 096739112110467
Author(s):  
Rui Li ◽  
Guisen Fan ◽  
Peng Wang ◽  
Xiao Ouyang ◽  
Ning Ma ◽  
...  
Keyword(s):  
Water Absorption ◽  
Coupling Agent ◽  
Coupling Agents ◽  
Syntactic Foams ◽  
Silane Coupling Agents ◽  
Glass Microspheres ◽  
Hollow Glass Microspheres ◽  
Hollow Glass ◽  
Silane Coupling ◽  
The One

A syntactic foam was prepared from an epoxy resin matrix and modified hollow glass microsphere fillers. Modification by silane coupling agents with different molecular structures was analyzed, and the optimal content of the silane coupling agent was determined. The results demonstrated that all silane coupling agents enhanced the adhesion between the hollow glass microspheres and epoxy resin matrix, resulting in enhanced water absorption, compressive performance, tensile performance, and bending performance compared to those prepared using unmodified hollow glass microspheres. Among silane coupling agents with different end groups, the one with a sulfhydryl end group exhibited optimal modification for hollow glass microspheres. Among the silane coupling agents with different backbone structures, the one with silanol groups exhibited the optimal modification of hollow glass microspheres. Additionally, the performance of the syntactic foams was optimal when 6% of the silanol-containing coupling agent was used. The results demonstrated that syntactic foams prepared with hollow glass microspheres modified by silane coupling agents exhibited improvements in water absorption, compressive performance, tensile performance, and bending performance, compared with those prepared using unmodified hollow glass microspheres. Among silane coupling agents with different end structures, the one with a sulfhydryl group as end group showed the best modification effect on hollow glass microspheres. The water absorption was 0.35%, the compressive strength was 62.15 MPa, the tensile strength was 40.15 MPa, and the bending strength was 53.17 MPa. Among silane coupling agents with different backbone structures, the one with silanol groupsbonds showed the best results. Its compressive strength was up to 64.15 MPa, the tensile strength was 35.47 MPa, and the bending strength was 53.99 MPa.

scholarly journals Treatment of hollow glass bubbles with silane coupling agent. sem on hollow glass bubbles, before and after treatment with silane coupling agent

2021 ◽  
Vol 2 (2) ◽  
pp. 1-7
Author(s):  
Andrei-Ionut Perdum
Keyword(s):  
Coupling Agent ◽  
Silane Coupling Agent ◽  
Hollow Spheres ◽  
Coupling Agents ◽  
Silane Coupling Agents ◽  
Hollow Glass ◽  
Glass Spheres ◽  
Silane Coupling ◽  
Before And After ◽  
Glass Bubble

In this study will be presented, how 20 millilitres of Silane Coupling Agent, adhered on 5 grams of Hollow Glass Bubbles (HGB), how the micro bubbles are looking before and after mixing, how to filter the hollow spheres from the agent and what needed to be taken in consideration when using coupling agents in processes. This paper will show how Silane Coupling Agent (3-Aminopropyl) triethoxysilane, adhered on the Hollow Glass Bubble (HGB). It is expected to observe at HR-SEM (High- Resolution Scanning Electron Microscopy) how the Hollow Glass Bubbles looks when the Silane Coupling Agent (KH-550) is applied on the filler vs when is not. During the process will be concluded, what risks should be taken in consideration, when using Silane Coupling Agents on Hollow Glass Spheres and what important information/ steps are needed to be taken in consideration before and after coupling treatment.

Fabrication of heat-resistant syntactic foams through binding hollow glass microspheres with phosphate adhesive

2016 ◽  
Vol 95 ◽  
pp. 32-38 ◽  
Author(s):  
Haitao Geng ◽  
Jiachen Liu ◽  
Anran Guo ◽  
Sue Ren ◽  
Xiqing Xu ◽  
...  
Keyword(s):  
Syntactic Foams ◽  
Glass Microspheres ◽  
Hollow Glass Microspheres ◽  
Hollow Glass ◽  
Heat Resistant

COOPERATIVE EFFECTS OF EPOXIDE FUNCTIONAL GROUPS ON NATURAL RUBBER AND SILANE COUPLING AGENTS ON REINFORCING EFFICIENCY OF SILICA

2014 ◽  
Vol 87 (2) ◽  
pp. 291-310 ◽  
Author(s):  
W. Kaewsakul ◽  
K. Sahakaro ◽  
W. K. Dierkes ◽  
J. W. M. Noordermeer
Keyword(s):  
Natural Rubber ◽  
Functional Groups ◽  
Coupling Agent ◽  
Silica Content ◽  
Coupling Agents ◽  
Silane Coupling Agents ◽  
Cooperative Effects ◽  
Optimal Loading ◽  
Silane Coupling

ABSTRACT Polar functionality attached onto natural rubber has a significant impact on the reinforcing efficiency of silica. Parallel studies involving various levels of epoxidation on natural rubber (ENR) in the absence of bis-(triethoxysilylpropyl) tetrasulfide (TESPT) coupling agent, as well as a combination of ENRs with different loadings of TESPT, provide a better understanding of the various factors that influence the properties of silica-filled ENR compounds. Based on the overall properties, the best possible combination to optimize processability, to reduce filler–filler interaction, and improve vulcanization rate as well as vulcanizate properties, is to use ENR with an epoxide content in the range of 20–30 mol%, together with a small portion of TESPT, that is, 2–4 wt% relative to the silica content. This leads to a reduction of approximately 60–80% of TESPT when compared with the conventional NR compounds, where the optimal loading of TESPT was 9.0 wt% relative to the silica content.

Synthesis of Substrate-bound Seaweed-like Au Nanowires with Amino Silane Coupling Agents

2022 ◽  
Author(s):  
Jialong Yu ◽  
Weiyu Wang ◽  
Shumin Li ◽  
Beibei Yu ◽  
Hongyu Chen ◽  
...  
Keyword(s):  
Coupling Agent ◽  
Active Surface ◽  
Coupling Agents ◽  
Silane Coupling Agents ◽  
One Dimensional ◽  
Amino Silane ◽  
Silane Coupling ◽  
Dimensional Growth ◽  
Au Nanowires

Seaweed-like Au nanowires were synthesized without any nanoparticle seeds. The amino silcane coupling agent 3-aminopropyltriethoxysilane was used to form the active surface on Au substrate to facilitate one dimensional growth....

Study on preparation and properties of carbon nanotubes/hollow glass microspheres/epoxy syntactic foam

2017 ◽  
Vol 37 (1) ◽  
pp. 93-98 ◽  
Author(s):  
Xingguo Zhang ◽  
Bin Ya ◽  
Bingkun Huang ◽  
Bingwen Zhou ◽  
Leizhen Pei ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Water Absorption ◽  
Salt Water ◽  
Syntactic Foam ◽  
Inorganic Ions ◽  
Testing Time ◽  
Glass Microspheres ◽  
Hollow Glass Microspheres ◽  
Multiwalled Carbon ◽  
Hollow Glass

Abstract Hollow glass microspheres (HGMs)/epoxy syntactic foam reinforced by multiwalled carbon nanotubes (MWCNTs) was prepared in this study. The effect of MWCNTs on the density, mechanical properties and water absorption of HGMs/epoxy syntactic foam was investigated. Because of the low density and low content of MWCNTs, the density of HGMs/epoxy syntactic foam does not change much with adding MWCNTs. In addition, the compression strength of HGMs/epoxy is enhanced by 17–25% when adding 0.3 wt% MWCNTs. The fracture surfaces of specimens were examined with scanning electron microscopy (SEM), and results indicated that the bridging effect of MWCNTs is the reinforcement mechanism. Analyzing the water absorption testing results, it is concluded that MWCNTs may decrease the water absorption content due to the hydrophobicity. Bigger inorganic ions in salt water could prevent the water diffusion, which results in a decrease of water absorption. In addition, the water absorption rate decreases with the extension of testing time.

Effective Young’s Modulus of Syntactic Foams with Hollow Glass Microspheres

2010 ◽  
Vol 29-32 ◽  
pp. 607-612 ◽  
Author(s):  
Chang Jun He ◽  
Hui Jian Li ◽  
Wei Yu ◽  
Xi Liang ◽  
Hai Yan Peng
Keyword(s):  
Young’S Modulus ◽  
Young's Modulus ◽  
Mechanical Analysis ◽  
Particulate Composites ◽  
Syntactic Foams ◽  
Glass Microspheres ◽  
Hollow Glass Microspheres ◽  
Hollow Glass ◽  
Young’S Moduli ◽  
Effective Young's Moduli

. The Young’s modulus of syntactic foams were studied both the experiment and the theory. The compressive test and dynamic mechanical analysis were progressed for a few of specimens, which were made of the syntactic foams with the epoxy resin and hollow glass microspheres (HGMs). the equations for Young’s modulus of concentrated particulate composites were derived using a differential scheme of an infinitely dilute system, and were employed to prediction the Young’s modulus of syntactic foams. The computed effective Young’s moduli were compared with the experimental results, the prediction values were between the lower and upper bounds of the experimental data, and the prediction model was acceptable and can estimate the Young’s modulus of syntactic foams.

Surface Functionalization of Zirconia Nanocrystals with Silane Coupling Agent and its Dispersion Behavior in O-Phenylphenoxyethyl Acrylate

2018 ◽  
Vol 922 ◽  
pp. 20-25 ◽  
Author(s):  
Hee Seon Lee ◽  
Jeong Min Park ◽  
Kyu Hong Hwang ◽  
Hyung Mi Lim
Keyword(s):  
Coupling Agent ◽  
Silane Coupling Agent ◽  
Coupling Agents ◽  
Solvothermal Reaction ◽  
Silane Coupling Agents ◽  
Propyl Methacrylate ◽  
Silane Coupling ◽  
Ft Ir ◽  
Surface Modified ◽  
Dispersion Of Nanoparticles

Highly crystalline and dispersible zirconia, synthesized by solvothermal reaction of zirconium (IV) isopropoxide isopropanol complex in benzyl alcohol, were functionalized with silane coupling agent and dispersed with o-phenylphenoxyethyl acrylate (OPPEA). Silane coupling agents such as 3-aminopropyltriethoxysilane (APTES) of amino functional silane, decyltrimethoxysilane (DTMS) of alkyl functional silane and 3-(trimethoxysilyl) propyl methacrylate (MPS) of acrylate functional silane have been used to modify nanoparticle surfaces and obtain dispersion of nanoparticles within OPPEA. The surface modified zirconia was compared according to silane coupling agent, FT-IR and TGA demonstrated that APTES, DMTS and MPS are chemically attached to the surface of the zirconia. The MPS-zirconia is dispersed as about 5 nm sized, whereas the APTES-zirconia, DTMS-zirconia are agglomerated. The MPS-zirconia/tetrahydrofuran (THF) sol at 15wt% loading shows high transmittance of 68 % at 550 cm-1 and the 50wt% surface modified-zirconia/OPPEA sol show refractive index of 1.657.

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