Polyhedral Oligomeric Silsesquioxane as a Cross-linker for Preparation of Inorganic−Organic Hybrid Monolithic Columns

2010 ◽  
Vol 82 (13) ◽  
pp. 5447-5454 ◽  
Author(s):  
Minghuo Wu ◽  
Ren’an Wu ◽  
Ruibing Li ◽  
Hongqiang Qin ◽  
Jing Dong ◽  
...  
Keyword(s):  
Polyhedral Oligomeric Silsesquioxane ◽  
Monolithic Columns ◽  
Organic Hybrid ◽  
Cross Linker ◽  
Oligomeric Silsesquioxane

An optical sensor for discriminating the chemical compositions and sizes of plastic particles in water based on water-soluble networks consisting of polyhedral oligomeric silsesquioxane presenting dual-color luminescence

2019 ◽  
Vol 3 (12) ◽  
pp. 2690-2695 ◽  
Author(s):  
Ryota Nakamura ◽  
Hayato Narikiyo ◽  
Masayuki Gon ◽  
Kazuo Tanaka ◽  
Yoshiki Chujo
Keyword(s):  
Optical Sensor ◽  
Color Change ◽  
Polyhedral Oligomeric Silsesquioxane ◽  
Water Soluble ◽  
Chemical Compositions ◽  
Dual Color ◽  
Water Based ◽  
Cross Linker ◽  
Oligomeric Silsesquioxane

Luminescent water-soluble networks containing coumarin were prepared using polyhedral oligomeric silsesquioxane (POSS) as a cross-linker, and plastic particles in water can be detected by luminescent color change.

Inorganic–Organic Hybrid Photomechanical Crystals of Azobenzene-modified Polyhedral Oligomeric Silsesquioxane (POSS)

2020 ◽  
Vol 49 (3) ◽  
pp. 327-329
Author(s):  
Ryota Kajiya ◽  
Hiroaki Wada ◽  
Kazuyuki Kuroda ◽  
Atsushi Shimojima
Keyword(s):  
Polyhedral Oligomeric Silsesquioxane ◽  
Organic Hybrid ◽  
Oligomeric Silsesquioxane

Gelation Behavior, Morphology, Thermal and Viscoelastic Properties of Epoxy-Cyanate Ester/Polyhedral Oligomeric Silsesquioxane (POSS) Nanocomposites

2006 ◽  
Vol 11-12 ◽  
pp. 323-326 ◽  
Author(s):  
Jun Peng Ma ◽  
Qi Fang Li
Keyword(s):  
Polyhedral Oligomeric Silsesquioxane ◽  
Mechanical Analysis ◽  
Decomposition Temperature ◽  
Cyanate Ester ◽  
X Ray Diffraction ◽  
Scanning Calorimetry ◽  
Weight Percentage ◽  
Organic Hybrid ◽  
Gelation Behavior ◽  
Oligomeric Silsesquioxane

Epoxy-cyanate (EP-CE) ester composites containing the inorganic-organic hybrid polyhedral oligomeric silsesquioxane (POSS) octaisobutyl(T8)-POSS (oib-POSS) were prepared. These EP-CE/POSS composites were characterized by gelation characteristics, transmission election microscopy (TEM), X-ray diffraction (XRD), differential scanning calorimetry (DSC), thermal gravimetric analyses (TGA) and dynamic mechanical analysis (DMTA). The glass transition temperature (Tg) and thermal decomposition temperature (Tdec) of composites increased compared with the neat epoxy-cyanate ester with the increment of POSS content. Additionally, all the EP-CE/POSS composites exhibited higher storage modulus (E’) values (temperature>Tg) than the pure resins. The loss factor peak intensities decreased as the weight percentage of POSS increases. TEM and XRD showed that phase-separated aggregates of POSS were found in matrix, because POSS did not react with the resin.

Model Polyhedral Oligomeric Silsesquioxane Thin Films for Coating Applications

2002 ◽  
Author(s):  
Brent Viers ◽  
Shawn Phillips ◽  
Timothy Haddad ◽  
Alan Esker ◽  
Joe Polidan
Keyword(s):  
Thin Films ◽  
Polyhedral Oligomeric Silsesquioxane ◽  
Oligomeric Silsesquioxane

Polyhedral Oligomeric Silsesquioxane /Platelets Rich Plasma/Gelrite-Based Hydrogel Scaffold for Bone Tissue Engineering

2020 ◽  
Vol 26 (26) ◽  
pp. 3147-3160
Author(s):  
Saeedeh Ahmadipour ◽  
Jaleh Varshosaz ◽  
Batool Hashemibeni ◽  
Leila Safaeian ◽  
Maziar Manshaei
Keyword(s):  
Bone Fractures ◽  
Compressive Strain ◽  
Gelation Time ◽  
Polyhedral Oligomeric Silsesquioxane ◽  
Local Drug Delivery ◽  
Gelling Agent ◽  
Control Group ◽  
Hydrogel Scaffold ◽  
Alizarin Red ◽  
Oligomeric Silsesquioxane

Background: Polyhedral oligomeric silsesquioxane (POSS) is a monomer with silicon structure and an internal nanometric cage. Objective: The purpose of this study was to provide an injectable hydrogel that could be easily located in open or closed bone fractures and injuries, and also to reduce the possible risks of infections caused by bone graft either as an allograft or an autograft. Methods: Various formulations of temperature sensitive hydrogels containing hydroxyapatite, Gelrite, POSS and platelets rich plasma (PRP), such as the co-gelling agent and cell growth enhancer, were prepared. The hydrogels were characterized for their injectability, gelation time, phase transition temperature and viscosity. Other physical properties of the optimized formulation including compressive stress, compressive strain and Young’s modulus as mechanical properties, as well as storage and loss modulus, swelling ratio, biodegradation behavior and cell toxicity as rheometrical parameters were studied on human osteoblast MG-63 cells. Alizarin red tests were conducted to study the qualitative and quantitative osteogenic capability of the designed scaffold, and the cell adhesion to the scaffold was visualized by scanning electron microscopy. Results: The results demonstrated that the hydrogel scaffold mechanical force and injectability were 3.34±0.44 Mpa and 12.57 N, respectively. Moreover, the scaffold showed higher calcium granules production in alizarin red staining compared to the control group. The proliferation of the cells in G4.5H1P0.03PRP10 formulation was significantly higher than in other formulations (p<0.05). Conclusion: The optimized Gelrite/Hydroxyapatite/POSS/PRP hydrogel scaffold has useful impacts on osteoblasts activity, and may be beneficial for local drug delivery in complications including a break or bone loss.

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