Preparation of irrefrangible polyacrylamide hybrid hydrogels using water-dispersible cyclotetrasiloxane or polyhedral oligomeric silsesquioxane containing polymerizable groups as cross-linkers

2018 ◽  
Vol 9 (17) ◽  
pp. 2302-2312 ◽  
Author(s):  
Makoto Yanagie ◽  
Yoshiro Kaneko

Irrefrangible polyacrylamide hybrid hydrogels were prepared using polymerizable siloxane oligomers as cross-linkers (CyTS-MNa and POSS-MNa, respectively).

2020 ◽  
Vol 32 (6) ◽  
pp. 681-692 ◽  
Author(s):  
Dan Zhao ◽  
Jinmei He ◽  
Nan Zheng ◽  
Yudong Huang

Polyhedral oligomeric silsesquioxane (POSS) was grafted onto the surface of carbon fibres (CFs) to fabricate carbon fibre/epoxy (CF/EP) composites with improved interlaminar shear strength (ILSS) and atomic oxygen (AO) erosion resistance. POSS-CF was prepared by reacting amine groups on the pretreated CF surface with the POSS to form a continuous uniform layer of siloxane oligomers. X-Ray photoelectron spectroscopy, scanning electron microscopy and Fourier transform infrared spectroscopy demonstrated that POSS was successfully grafted onto the CF surface. The ILSS and AO erosion resistance of the POSS-treated CFs and CF-EP interface were improved because a SiO2 passivation layer formed with AO exposure, especially with POSS-EP0409. This is an effective solution for enhancing the interfacial bonding force and interfacial AO erosion resistance for the low-Earth orbit environment.


RSC Advances ◽  
2016 ◽  
Vol 6 (28) ◽  
pp. 23471-23478 ◽  
Author(s):  
Xiuwei Pan ◽  
Hao Gao ◽  
Guodong Fu ◽  
Yun Gao ◽  
Weian Zhang

Polyhedral oligomeric silsesquioxanes (POSS)-based hybrid hydrogels were successfully prepared via a fast azide-alkyne click reaction between octa-azido-functionalized POSS (OAPOSS) and alkyne-functionalized poly(ethylene glycol) (PEG).


2002 ◽  
Author(s):  
Brent Viers ◽  
Shawn Phillips ◽  
Timothy Haddad ◽  
Alan Esker ◽  
Joe Polidan

Sign in / Sign up

Export Citation Format

Share Document