Preparation, stabilization and characterization of 3-(methacryloyloxy) propyl trimethoxy silane modified colloidal nanosilica particles

Tham, Do Quang; Chung, Ildoo; Kim, Taeyoon; Kang, Jiin; Man, Minh Tan; Dung, Nguyen Thi Kim; Huynh, Mai Duc; Лам, Тран Дай; Chinh, Nguyễn Thúy; Bach, Long Giang; Hoàng, Thái

doi:10.1016/j.colsurfa.2019.124066

Cited by 11 publications

(7 citation statements)

References 36 publications

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“…MRS is an imaging technology based on the resonance signal of atomic nuclei within a magnetic field and can measure the signal of compounds according to the chemical shift principle. It can analyze the tissue metabolism and physiological and biochemical changes caused by the disease, which is of significance for the early diagnosis of the pathogenesis of bilirubin encephalopathy [ 18 – 20 ]. At present, MRS can detect atoms such as 1 H, 13 C, and 31 P and has the highest sensitivity for detecting 1 H. It measures the levels of metabolites such as NAA, Cho, mI, and Glx and is widely used in the clinical trials of neonatal neurological diseases [ 21 , 22 ].…”

Section: Discussionmentioning

confidence: 99%

Correlation Analysis of TSB Level and Globus Pallidus-Related Metabolite Indexes of Proton Magnetic Resonance Spectroscopy in the Newborn with Neonatal Jaundice

Liu

Zhang

et al. 2022

Evidence-Based Complementary and Alternative Medicine

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Objective. To investigate the correlation between serum total serum bilirubin (TSB) levels and globus pallidus-related metabolic indexes of proton magnetic resonance spectroscopy (1H-MRS) in the newborn with neonatal jaundice. Methods. 50 children with neonatal jaundice admitted to our hospital from January 2019 to January 2021 were recruited and assigned to a mild condition group (TSB < 221 μmol/L, n = 16), a moderate condition group (221 μmol/L ≤ TSB < 3 42 μmol/L, n = 18), and a severe condition group (342 μmol/L ≤ TSB < 428 μmol/L, n = 16) based on peak TSB. The differences in globus pallidus-related metabolic indexes of 1H-MRS between the groups were compared and their correlation with TSB levels was analyzed. Results. The three groups had comparable N-acetylaspartic acid (NAA)/creatine (Cr), choline (Cho)/Cr, lactic acid (Lac)/Cr, and ml/Cr levels ( P > 0.05 ), while there were statistical differences in glutamine (Glx)/Cr levels ( P < 0.05 ). The severe condition group showed the highest levels of neuron-specific enolase (NSE), creatine kinase-MB (CK-MB), and troponin (cTnl), followed by the moderate group, and then the mild group ( P < 0.05 ). The TSB level is positively correlated with the 1H-MRS metabolic index Glx/Cr. Conclusions. The serum TSB level is correlated with the 1H-MRS metabolic index Glx/Cr in the newborn with neonatal jaundice, and the levels of TSB and Glx/Cr provide a reference for the diagnosis of bilirubin encephalopathy.

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Section: Discussionmentioning

confidence: 99%

Correlation Analysis of TSB Level and Globus Pallidus-Related Metabolite Indexes of Proton Magnetic Resonance Spectroscopy in the Newborn with Neonatal Jaundice

Liu

Zhang

et al. 2022

Evidence-Based Complementary and Alternative Medicine

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“…We used the IR spectra to quantify the C16:TPM ratio in the emulsion droplets using the ratio of CC (1637 cm –1 ) str to CH 2 (1378 cm –1 ) def bands (Figure c). − We see that the composition of the emulsified phase is unaffected by the presence of C16 in the initial oil phase (red points). We also observe that TPM is absent from the residual oil phase (star points).…”

Section: Resultsmentioning

confidence: 99%

Droplet Formation and Growth Mechanisms in Reaction-Induced Spontaneous Emulsification of 3-(Trimethoxysilyl) Propyl Methacrylate

2021

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Spontaneous emulsification of 3-(trimethoxysilyl) propyl methacrylate (TPM) can produce complex and active colloids, nanoparticles, or monodisperse Pickering emulsions. Despite the applicability of TPM in particle synthesis, the nucleation and growth mechanisms of TPM emulsions are still poorly understood. We investigate droplet formation and growth of TPM in aqueous solutions under quiescent conditions. Our results show that in the absence of stirring the mechanisms of diffusion and stranding likely drive the spontaneous emulsification of TPM through the formation of co-soluble species during hydrolysis. In addition, turbidity and dynamic light scattering experiments show that the pH modulates the growth mechanism. At pH 10.1, the droplets grow via Ostwald ripening, while at pH 11.5, the droplets grow via monomer addition. Adding surfactants [Tween, sodium dodecyl sulfate (SDS), or cetyltrimethylammonium bromide] leads to <100 nm droplets that are kinetically stable. The growth of Tween droplets occurs through addition of TPM species while the number density of droplets is kept constant. In addition, in the presence of the ionic surfactant SDS, electrostatic repulsion between the solubilized TPM species and SDS leads to a significant increase in the number density of droplets as well as additional nucleation events. Finally, imaging of the solubilization of TPM in capillaries shows that in the absence of a surfactant, TPM hydrolysis is likely the rate-limiting step for emulsification, whereas the presence of silica particles in the aqueous phase likely acts as a catalyst of TPM hydrolysis. Our experiments highlight the importance of diffusion and solubilization of TPM species in the aqueous phase in the nucleation and growth of droplets.

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“…Silane modification of the surface of silica will increase the mechanical strength by increasing the compatibility between filler-matrix and weakening the interaction between fillers -fillers. 19,21,22 The DTS result shows the test group has a higher average value than the control group (Table 1 and Figure 2). The further explanation can be stated that the MPTS increases the wettability of the resin matrix toward the silica.…”

Section: Discussionmentioning

confidence: 95%

“…This indicates that fewer free -OH groups are unbounded to MPTS. 17,21 MPTS is a type of coupling agent that is often used to modify the surface of silica. The MPTS has a methoxy group that can undergo hydrolysis and reacts with the hydroxyl group belonging to the filler.…”

Section: Discussionmentioning

confidence: 99%

<strong>Effect of 3-methacryloxypropyltrimethoxysilane on diametral tensile strength of rice husk silica-based dental composite </strong>

et al. 2022

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Introduction: Rice husk silica has been studied as a filler in dental composite, however, the mechanical properties of the resulting composites are below the commercial due to the poor surface modification between silica and resin matrix. 3-methacryloxyprpyltrimethoxysilane (MPTS) is one of the coupling agents that are effective to modify the silica surface. The purpose of this study to analyze the effect of MPTS on the diametral tensile strength (DTS) of the self-made composite using rice husk silica. Methods: The research type of this study was an experimental research laboratory. The samples (26 samples) were divided into two groups, namely the test group (using MPTS-modified silica) and the control group (using non-modified silica). The samples were cylindrical in shape with a diameter of 6.0 ± 0.1 mm and a height of 3.0 ± 0.1 mm according to ANSI/ADAS No. 27, 1993 and ISO 4049, 1988. The Fourier Transform Infrared (FTIR), HORIBA, was used to characterize the MPTS grafting on the silica surface. The DTS value is measured by Universal Testing Machine (UTM), Lloyd LRX Plus. Results: FTIR presents the additional peak of carboxyl and methacryloyl group at 1716, 1555, and 1410 cm-1 wavenumber, respectively in MPTS-modified silica. The DTS value of the test group was 43.40 ± 4.43 MPa and the control group was 25.80 ± 2.63 MPa. The test group was significantly higher than the control group (p-value = 0.001). Conclusion: The MPTS is effective to enhance the DTS value of rice husk silica-based composite.Keywords: Rice husk silica; dental composite; diametral tensile strength; 3-methacryloxypropyltrimethoxysilane.

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Preparation, stabilization and characterization of 3-(methacryloyloxy) propyl trimethoxy silane modified colloidal nanosilica particles

Cited by 11 publications

References 36 publications

Correlation Analysis of TSB Level and Globus Pallidus-Related Metabolite Indexes of Proton Magnetic Resonance Spectroscopy in the Newborn with Neonatal Jaundice

Correlation Analysis of TSB Level and Globus Pallidus-Related Metabolite Indexes of Proton Magnetic Resonance Spectroscopy in the Newborn with Neonatal Jaundice

Droplet Formation and Growth Mechanisms in Reaction-Induced Spontaneous Emulsification of 3-(Trimethoxysilyl) Propyl Methacrylate

<strong>Effect of 3-methacryloxypropyltrimethoxysilane on diametral tensile strength of rice husk silica-based dental composite </strong>

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