scholarly journals In situ repair of graphene defects and enhancement of its reinforcement effect in polyvinyl alcohol hydrogels

RSC Advances ◽  
2017 ◽  
Vol 7 (2) ◽  
pp. 1045-1055 ◽  
Author(s):  
Yan Shi ◽  
Dangsheng Xiong ◽  
Jianliang Li ◽  
Kun Wang ◽  
Nan Wang
Keyword(s):  
Polyvinyl Alcohol ◽  
Irradiation Dose ◽  
Reinforcement Effect ◽  
Reactive Groups ◽  
Γ Ray ◽  
In Situ Repair

The reactive groups on the edge of graphene defects are activated at a low γ-ray irradiation dose, and the resulting PVA scission chains at the high γ-ray dose link these reactive groups to repair the graphene defects.

An efficient approach to strengthen polyvinyl alcohol physical hydrogel via in situ growing NH2-decorated polysiloxane structures

2021 ◽  
Vol 290 ◽  
pp. 129505
Author(s):  
Haining Wang ◽  
Birong Tian ◽  
Fu Wang ◽  
Jinyun Zhang ◽  
Zhaofeng Wang
Keyword(s):  
Polyvinyl Alcohol ◽  
Efficient Approach

Surface and Composite Interface of Carbon Fiber Modified by Grafting of Diethanolamine

2009 ◽  
Vol 79-82 ◽  
pp. 497-500 ◽  
Author(s):  
Lei Chen ◽  
Zhi Wei Xu ◽  
Jia Lu Li ◽  
Xiao Qing Wu ◽  
Li Chen
Keyword(s):  
Shear Strength ◽  
Carbon Fiber ◽  
Functional Groups ◽  
Carbon Fibers ◽  
Irradiation Dose ◽  
Interlaminar Shear Strength ◽  
Epoxy Composites ◽  
Composite Interface ◽  
Γ Ray ◽  
Interlaminar Shear

The γ-ray co-irradiation method was employed to study the effect of diethanolamine modification on the surface of carbon fiber (CF) and the interfacial properties of CF/epoxy composites. Compared with the original carbon fiber, the surface of modified fibers became rougher. The amount of oxygen-containing functional groups was increased and the nitrogen element was detected after irradiation grafting. The interlaminar shear strength (ILSS) of composites reinforced by carbon fibers irradiated in diethanolamine solution was increased and then decreased as the irradiation dose increased. The ILSS of CF/epoxy composites was enhanced by 16.1% at 200kGy dose, compared with that of untreated one. The γ-ray irradiation grafting is expected to be a promising method for the industrialized modification of carbon fibers.

scholarly journals Outcomes of In Situ Repair for Treatment of Arteriovenous Fistula Aneurysm

2021 ◽  
Vol 74 (3) ◽  
pp. e201-e202
Author(s):  
Hunter M. Ray ◽  
Yuki Ikeno ◽  
Jacob Siahaan ◽  
Kristofer Charlton-Ouw
Keyword(s):  
Arteriovenous Fistula ◽  
In Situ Repair

Fast in-situ repair technology-a novel SPS process for the waste refractory W–10Ti targets

Vacuum ◽  
2021 ◽  
pp. 110406
Author(s):  
Lei Huang ◽  
Yafei Pan ◽  
Jiuxing Zhang ◽  
Yong Du ◽  
Yuhui Zhang ◽  
...  
Keyword(s):  
Repair Technology ◽  
In Situ Repair

In-situ Repair of Marine Coatings by a Fe3O4 Nanoparticle-Modified Epoxy Resin under Seawater

2021 ◽  
pp. 132827
Author(s):  
Zhenliang Feng ◽  
Rongjian Wan ◽  
Shiming Chen ◽  
Xiao Tang ◽  
Hong Ju ◽  
...  
Keyword(s):  
Epoxy Resin ◽  
Fe3o4 Nanoparticle ◽  
Marine Coatings ◽  
Modified Epoxy ◽  
In Situ Repair

In situ repair technique of infill masonry walls in steel frames damaged after an earthquake

2019 ◽  
Vol 178 ◽  
pp. 665-679 ◽  
Author(s):  
Mohammad Soheil Ghobadi ◽  
Roohollah Ahmady Jazany ◽  
Hamidreza Farshchi
Keyword(s):  
Steel Frames ◽  
Masonry Walls ◽  
Repair Technique ◽  
Infill Masonry ◽  
In Situ Repair

scholarly journals SYNTHESIS OF POLYVINYL ALCOHOL-CHITOSAN HYDROGEL AND STUDY OF ITS SWELLING AND ANTIBACTERIAL PROPERTIES

2013 ◽  
Vol 7 (1) ◽  
pp. 1 ◽  
Author(s):  
Thamrin Wikanta ◽  
Mr Erizal ◽  
Mr Tjahyono ◽  
Mr Sugiyono
Keyword(s):  
Polyvinyl Alcohol ◽  
Irradiation Dose ◽  
Gamma Ray ◽  
Antibacterial Properties ◽  
Positive Control ◽  
Negative Control ◽  
Initial Time ◽  
Water Evaporation ◽  
Combination Technique ◽  
Pva Hydrogel

The aim of this research was to synthesize a hydrogel for wound dressing by mixing of polyvinyl alcohol (PVA) and chitosan (CTS) and processed by combination technique of freezing-thawing and irradiation by gamma ray, and to study of its properties. PVA aqueous solution 10% (w/v) was mixed with 2% (w/v) chitosan (CTS) solution and homogenized. The PVA-CTS mixture was processed by freezing-thawing up to 3 cycles, and then irradiated by gamma rays at the doseranged of 20-50 kGy  (dose rate was 10 kGy/hour). Result showed that PVA-CTS hydrogel with the gel fraction of 83%, 87%, 90%, and 83% were obtained at the irradiation dose of 20 kGy, 30 kGy, 40 kGy, and 50 kGy, respectively. Increasing of irradiation dose caused increasing of water absorption of hydrogel, i.e. 1.700 %, 1.715 %, 1.913 %, and 2.036 %, respectively, and the hydrogel reached the equilibrium in 25 hours. The hydrogel showed very slow water evaporation rate (~ 2%) at the initial time (1 hour) and then increased very fast (up ~50 %) at 24 h, i.e. 43%, 39.13%, 44%, and 53%, respectively. The elongation at break of hydrogels were obtained 245%, 322%, 322%, and 205% with the maximum value were obtained at irradiation dose ranged of 30-40 kGy. The presence of chitosan in the PVA hydrogel made it having higher antibacterial properties with the inhibitionzone value of 8 mm at irradiation dose of 30-40 kGy compared to PVA hydrogel as a negative control (6 mm) and to chloramphenicol as a positive control (8 mm).

scholarly journals Successful In Situ Repair for Mycotic Aneurysm of the Iliac Artery with Autologous Superficial Femoral Vein.

2003 ◽  
Vol 32 (2) ◽  
pp. 112-115
Author(s):  
Masato Yoshida ◽  
Tsutomu Shida ◽  
Nobuhiko Mukohara ◽  
Hidefumi Obo ◽  
Nobuhiro Tanimura ◽  
...  
Keyword(s):  
Iliac Artery ◽  
Mycotic Aneurysm ◽  
Femoral Vein ◽  
Superficial Femoral Vein ◽  
In Situ Repair
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