Biintercalate layered heterostructure: synthesis conditions and physical properties

2021 ◽  
Vol 47 (12) ◽  
pp. 1065-1071
Author(s):  
F. O. Ivashchyshyn ◽  
V. M. Maksymych ◽  
T. D. Krushelnytska ◽  
O. V. Rybak ◽  
B. O. Seredyuk ◽  
...  
Keyword(s):  
Physical Properties ◽  
Synthesis Conditions

Effect of sol–gel synthesis conditions on the physical properties of silica hydrogels

2020 ◽  
Vol 30 (6) ◽  
pp. 812-814
Author(s):  
Ekaterina S. Dolinina ◽  
Anton S. Kraev ◽  
Elena V. Parfenyuk
Keyword(s):  
Physical Properties ◽  
Sol Gel ◽  
Synthesis Conditions ◽  
Silica Hydrogels ◽  
Sol Gel Synthesis

Effect of synthesis conditions on physical properties, laccase catalytic activity and stability of sol–gel laccase

2016 ◽  
Vol 80 (3) ◽  
pp. 587-597 ◽  
Author(s):  
Nur Atikah Mohidem ◽  
Azmi Fadziyana Mansor ◽  
Wan Nurul Izyani Wan Mohamad Zawawi ◽  
Nurul Sakinah Othman ◽  
Hanapi Mat
Keyword(s):  
Catalytic Activity ◽  
Physical Properties ◽  
Sol Gel ◽  
Synthesis Conditions

scholarly journals Physical Characterization and In Vitro Toxicity Test of PDMS Synthesized from Low-Grade D4 Monomer as a Vitreous Substitute in the Human Eyes

2022 ◽  
Vol 13 (1) ◽  
pp. 3
Author(s):  
Diba Grace Auliya ◽  
Soni Setiadji ◽  
Fitrilawati Fitrilawati ◽  
Risdiana Risdiana
Keyword(s):  
Physical Properties ◽  
Vitreous Humor ◽  
In Vitro Toxicity ◽  
Low Grade ◽  
Synthesis Conditions ◽  
Human Eyes ◽  
In Vitro Toxicity Test ◽  
Specific Synthesis ◽  
Medium Viscosity

Polydimethylsiloxane (PDMS) is one of the most superior materials and has been used as a substitute for vitreous humor in the human eye. In previous research, we have succeeded in producing PDMS with low and medium viscosity using octamethylcyclotetrasiloxane (D4) monomer with a low grade of 96%. Both have good physical properties and are comparable to commercial product PDMS and PDMS synthesized using D4 monomer with a high grade of 98%. An improvement of the synthesis process is needed to ensure that PDMS synthesized from a low-grade D4 monomer under specific synthesis conditions can repeatedly produce high-quality PDMS. Apart from good physical properties, the PDMS as a substitute for vitreous humor must also be safe and not cause other disturbances to the eyes. Here, we reported the process of synthesizing and characterizing the physical properties of low- and medium-viscosity PDMS using a low-grade D4 monomer. We also reported for the first time the in vitro toxicity test using the Hen’s Egg Test Chorioallantoic Membrane (HET-CAM) test method. We have succeeded in obtaining PDMS with viscosities of 1.15 Pa.s, 1.17 Pa.s, and 1.81 Pa.s. All samples have good physical properties such as refractive index, surface tension, and functional groups that are similar to commercial PDMS. The HET-CAM test results showed that all samples did not show signs of irritation indicating that samples were non-toxic. From the results of this study, it can be concluded that PDMS synthesized from a low-grade D4 monomer under specific synthesis conditions by the ROP method is very safe and has the potential to be developed as a substitute for vitreous humor in human eyes.

scholarly journals Precise control of synthetic hydrogel network structure via linear, independent synthesis-swelling relationships

2021 ◽  
Vol 7 (7) ◽  
pp. eabe3245
Author(s):  
N. R. Richbourg ◽  
M. Wancura ◽  
A. E. Gilchrist ◽  
S. Toubbeh ◽  
B. A. C. Harley ◽  
...  
Keyword(s):  
Physical Properties ◽  
Network Structure ◽  
A Priori ◽  
Polymer Concentration ◽  
Polymer Network ◽  
Network Models ◽  
Poly Vinyl Alcohol ◽  
Glycol Diacrylate ◽  
Synthesis Conditions ◽  
Precise Control

Hydrogel physical properties are tuned by altering synthesis conditions such as initial polymer concentration and polymer–cross-linker stoichiometric ratios. Traditionally, differences in hydrogel synthesis schemes, such as end-linked poly(ethylene glycol) diacrylate hydrogels and cross-linked poly(vinyl alcohol) hydrogels, limit structural comparison between hydrogels. In this study, we use generalized synthesis variables for hydrogels that emphasize how changes in formulation affect the resulting network structure. We identify two independent linear correlations between these synthesis variables and swelling behavior. Analysis through recently updated swollen polymer network models suggests that synthesis-swelling correlations can be used to make a priori predictions of the stiffness and solute diffusivity characteristics of synthetic hydrogels. The same experiments and analyses performed on methacrylamide-modified gelatin hydrogels demonstrate that complex biopolymer structures disrupt the linear synthesis-swelling correlations. These studies provide insight into the control of hydrogel physical properties through structural design and can be used to implement and optimize biomedically relevant hydrogels.

scholarly journals Influence of synthesis conditions on physical properties of lanthanide-doped titania for photocatalytic decomposition of metazachlor

2015 ◽  
Vol 36 (10) ◽  
pp. 1679-1684 ◽  
Author(s):  
Marcela Kralova ◽  
Irina Levchuk ◽  
Vit Kasparek ◽  
Mika Sillanpaa ◽  
Jaroslav Cihlar
Keyword(s):  
Physical Properties ◽  
Photocatalytic Decomposition ◽  
Synthesis Conditions ◽  
Doped Titania

Influence of synthesis conditions and of neutron irradiation on physical properties of spontaneous crystalline diamonds

2005 ◽  
Vol 14 (10) ◽  
pp. 1678-1682 ◽  
Author(s):  
A.G. Dutov ◽  
V.A. Komar ◽  
V.B. Shipilo ◽  
N.V. Shipilo ◽  
I.I. Azarko ◽  
...  
Keyword(s):  
Physical Properties ◽  
Neutron Irradiation ◽  
Synthesis Conditions
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