scholarly journals Immobilization of isolated FI catalyst on polyhedral oligomeric silsesquioxane-functionalized silica for the synthesis of weakly entangled polyethylene

2016 ◽  
Vol 52 (74) ◽  
pp. 11092-11095 ◽  
Author(s):  
Wei Li ◽  
Huaqin Yang ◽  
Jingjing Zhang ◽  
Jingshan Mu ◽  
Dirong Gong ◽  
...  
Keyword(s):  
Polyhedral Oligomeric Silsesquioxane ◽  
Functionalized Silica ◽  
Oligomeric Silsesquioxane ◽  
Fi Catalyst

POSS-functionalized silica can isolate the anchored FI catalysts and hinder chain overlap in the polymerization of ethylene.

Preparation and modification of polyhedral oligomeric silsesquioxane-containing hybrid monolithic capillary columns

2013 ◽  
Vol 31 (4) ◽  
pp. 322
Author(s):  
Junjie OU ◽  
Hui LIN ◽  
Zheyi LIU ◽  
Zhenbin ZHANG ◽  
Jing DONG ◽  
...  
Keyword(s):  
Polyhedral Oligomeric Silsesquioxane ◽  
Capillary Columns ◽  
Monolithic Capillary Columns ◽  
Oligomeric Silsesquioxane

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.

Polyhedral oligomeric silsesquioxane hybrided with DOPO and phenylboronic acid for flame‐retarded epoxy resin

2021 ◽  
Author(s):  
Zeng Birong ◽  
Zhou Ruirui ◽  
Zheng Xianghong ◽  
Ye Jianyu ◽  
Chen Jinmei ◽  
...  
Keyword(s):  
Epoxy Resin ◽  
Phenylboronic Acid ◽  
Polyhedral Oligomeric Silsesquioxane ◽  
Flame Retarded ◽  
Oligomeric Silsesquioxane

scholarly journals Polyhedral oligomeric silsesquioxane (POSS)-modified phenolic resin: Synthesis and anti-oxidation properties

e-Polymers ◽  
2021 ◽  
Vol 21 (1) ◽  
pp. 316-326
Author(s):  
Bing Wang ◽  
Minxian Shi ◽  
Jie Ding ◽  
Zhixiong Huang
Keyword(s):  
Phenolic Resin ◽  
Polyhedral Oligomeric Silsesquioxane ◽  
Synthesis Process ◽  
H Nmr ◽  
Chemical Structures ◽  
Carbon Fiber Fabric ◽  
Oxidation Properties ◽  
Tg And Dtg ◽  
Oligomeric Silsesquioxane ◽  
Fiber Fabric

Abstract In this work, octamercapto polyhedral oligomeric silsesquioxane (POSS-8SH) and octaphenol polyhedral oligomeric silsesquioxane (POSS-8Phenol) were successfully synthetized. POSS-8Phenol was added into the synthesis process of liquid thermoset phenolic resin (PR) to obtain POSS-modified phenolic resin (POSS-PR). Chemical structures of POSS-8SH, POSS-8Phenol, and POSS-PR were confirmed by FTIR and 1H-NMR. TG and DTG analysis under different atmosphere showed that char yield of POSS-PR at 1,000°C increased from 58.6% to 65.2% in N2, which in air increased from 2.3% to 26.9% at 700°C. The maximum pyrolysis temperature in air increased from 543°C to 680°C, which meant better anti-oxidation properties. XRD results confirmed both POSS-8Phenol and POSS-PR-generated crystalline SiO2 in air, which could explain the improvement of anti-oxidation properties. SEM showed that the POSS-PR had phase separation during curing process. Finally, carbon fiber fabric-reinforced POSS-PR (C-POSS-PR) was prepared to verify the anti-oxidation properties of POSS-PR.

Novel multifunctional nano-hybrid polyhedral oligomeric silsesquioxane-based molecules with high cell permeability: molecular design and application for diagnosis and treatment of tumors

Nanoscale ◽  
2021 ◽  
Vol 13 (5) ◽  
pp. 2982-2994
Author(s):  
Gang Wei ◽  
Kezhen Zhang ◽  
Yuanlong Gu ◽  
Shanyi Guang ◽  
Jihong Feng ◽  
...  
Keyword(s):  
Folic Acid ◽  
Molecular Design ◽  
Polyhedral Oligomeric Silsesquioxane ◽  
Cell Permeability ◽  
Targeted Imaging ◽  
High Cell ◽  
One Pot ◽  
Peg 400 ◽  
Multifunctional Molecules ◽  
Oligomeric Silsesquioxane

Octathiol POSS was used to connect PEG-400, hexene, folic acid, fluorescein, and thioguanine using a simple and efficient photo-initiated one-pot method to prepare multifunctional molecules, which have targeted imaging and therapeutic functions.

scholarly journals Large Polyhedral Oligomeric Silsesquioxane Cages: The Isolation of Functionalized POSS with an Unprecedented Si 18 O 27 Core

2020 ◽  
Author(s):  
Mathilde Laird ◽  
Niklas Herrmann ◽  
Naseem Ramsahye ◽  
Cédric Totée ◽  
Carole Carcel ◽  
...  
Keyword(s):  
Polyhedral Oligomeric Silsesquioxane ◽  
Oligomeric Silsesquioxane

Waterborne polyurethane/3-amino-polyhedral oligomeric silsesquioxane (NH2-POSS) nanocomposites with enhanced properties

2021 ◽  
Author(s):  
Haixiang Song ◽  
Qiqi Zhang ◽  
Yanwei Zhang ◽  
Yanfei Wang ◽  
Zhongyuan Zhou ◽  
...  
Keyword(s):  
Polyhedral Oligomeric Silsesquioxane ◽  
Waterborne Polyurethane ◽  
Enhanced Properties ◽  
Oligomeric Silsesquioxane
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