Nanoindentation of Yttria Doped Zirconia Under Hydrothermal Degradation

2009 ◽  
pp. 77-91
Author(s):  
y. Gaillard ◽  
E. Jimnez-Piqu ◽  
J. A. Muoz ◽  
J. Valle ◽  
M. Anglada
Keyword(s):  
Hydrothermal Degradation

scholarly journals An extensive parameter study of hydrotropic extraction of steam-pretreated birch

2021 ◽  
Author(s):  
Johanna Olsson ◽  
Michael Persson ◽  
Mats Galbe ◽  
Ola Wallberg ◽  
Ann-Sofi Jönsson
Keyword(s):  
Residence Time ◽  
Steam Explosion ◽  
Room Temperature ◽  
Initial Step ◽  
Parameter Study ◽  
Hydrothermal Degradation ◽  
Steam Explosion Pretreatment ◽  
Lignin Extraction ◽  
Extraction Step ◽  
Lignin Recovery

AbstractEfficient fractionation of lignocellulosic biomass is an important step toward the replacement of fossil-based products. However, the utilisation of all of the components in biomass requires various fractionation techniques. One promising process configuration is to apply steam explosion for the recovery of hemicelluloses and a subsequent hydrotropic extraction step for the delignification of the remaining solids. In this work, the influence of residence time, temperature and biomass loading on lignin recovery from birch using sodium xylene sulphonate as a hydrotrope was investigated. Our results show that residence time, temperature and biomass loading correlate positively with lignin extraction, but the effects of these parameters were limited. Furthermore, when steam explosion was implemented as the initial step, hydrotropic extraction could be performed even at room temperature, yielding a lignin extraction of 50%. Also, hydrothermal degradation of the material was necessary for efficient delignification with sodium xylene sulphonate, regardless of whether it occurs during steam explosion pretreatment or is achieved at high temperatures during the hydrotropic extraction.

scholarly journals Influence of relative humidity and low temperature hydrothermal degradation on fretting wear of Y-TZP dental ceramics

Wear ◽  
2019 ◽  
Vol 428-429 ◽  
pp. 1-9 ◽  
Author(s):  
Amparo Borrell ◽  
Lorena Gil ◽  
Alvaro Presenda ◽  
Maria D. Salvador ◽  
Jozef Vleugels ◽  
...  
Keyword(s):  
Relative Humidity ◽  
Low Temperature ◽  
Fretting Wear ◽  
Dental Ceramics ◽  
Hydrothermal Degradation

scholarly journals Hydrothermal Degradation Behavior of Y-TZP Ceramics Sintered by Nonconventional Microwave Technology

2015 ◽  
Vol 98 (12) ◽  
pp. 3680-3689 ◽  
Author(s):  
Álvaro Presenda ◽  
Maria Dolores Salvador ◽  
Rodrigo Moreno ◽  
Amparo Borrell
Keyword(s):  
Degradation Behavior ◽  
Microwave Technology ◽  
Hydrothermal Degradation

Raman Spectroscopy Evaluation of Subsurface Hydrothermal Degradation of Zirconia

2012 ◽  
Vol 95 (7) ◽  
pp. 2347-2351 ◽  
Author(s):  
Claudine Wulfman ◽  
Nadia Djaker ◽  
Nathalie Dupont ◽  
Dorin Ruse ◽  
Michaël Sadoun ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Hydrothermal Degradation

scholarly journals Mechanical Performance Under Various Conditions of 3D Printed Polylactide Composites With Natural Fibers

2021 ◽  
Author(s):  
Karolina E. Mazur ◽  
Aleksandra Borucka ◽  
Paulina Kaczor ◽  
Szymon Gądek ◽  
Stanislaw Kuciel
Keyword(s):  
Elevated Temperatures ◽  
Mechanical Performance ◽  
Natural Fibers ◽  
Crystallization Rate ◽  
Mechanical Tests ◽  
Hydrothermal Degradation ◽  
3D Printed ◽  
The Impact ◽  
Different Levels ◽  
Additive Methods

Abstract In the study, polylactide-based (PLA) composites modified with natural particles (wood, bamboo, and cork) and with different levels of infilling (100%, 80%, and 60%) obtained by additive methods were tested. The effect of type fiber, infill level and crystallization rate on the mechanical properties were investigated by using tensile, flexural, and impact tests. The materials were subjected to mechanical tests carried out at 23 and 80 °C. Furthermore, hydrothermal degradation was performed, and its effect on the properties was analyzed. The addition of natural fillers and different level of infilling result in a similar level of reduction in the properties. Composites made of PLA are more sensitive to high temperature than to water. The decrease in Young's modulus of PLA at 80 °C was 90%, while after 28 days of hydrodegradation ~ 9%. The addition of fibers reduced this decrease at elevated temperatures. Moreover, the impact strength has been improved by 50% for composites with cork particles and for other lignocellulosic composites remained at the same level as for resin.

scholarly journals NaOH/Urea Swelling Treatment and Hydrothermal Degradation of Waste Cotton Fiber

2020 ◽  
Vol 8 (6) ◽  
pp. 703-713
Author(s):  
Lixia Gao ◽  
Sheng Shi ◽  
Wensheng Hou ◽  
Shuhua Wang ◽  
Zhifeng Yan ◽  
...  
Keyword(s):  
Cotton Fiber ◽  
Hydrothermal Degradation ◽  
Waste Cotton Fiber
Sign in / Sign up

Export Citation Format

Share Document