scholarly journals Superhydrophobic silica aerogels reinforced with polyacrylonitrile fibers for adsorbing oil from water and oil mixtures

RSC Advances ◽  
2017 ◽  
Vol 7 (7) ◽  
pp. 4039-4045 ◽  
Author(s):  
Mingjia Shi ◽  
Cunguo Tang ◽  
Xudong Yang ◽  
Junling Zhou ◽  
Fei Jia ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Silica Aerogels ◽  
Simple Method ◽  
Oil Mixtures ◽  
Superhydrophobic Silica

Aerogels are modified by a simple method of hydrophobicity and mechanical properties simultaneously.

scholarly journals Mechanical and Thermoelectric Properties of Bulk AlSb Synthesized by Controlled Melting, Pulverizing and Subsequent Vacuum Hot Pressing

2019 ◽  
Vol 9 (8) ◽  
pp. 1609 ◽  
Author(s):  
A. K. M. Ashiquzzaman Shawon ◽  
Soon-Chul Ur
Keyword(s):  
Mechanical Properties ◽  
Intermetallic Compound ◽  
Thermoelectric Properties ◽  
Hot Pressing ◽  
Single Phase ◽  
Aluminum Antimonide ◽  
Simple Method ◽  
Group Iii ◽  
Indirect Band Gap ◽  
First Time

Aluminum antimonide is a semiconductor of the Group III-V order. With a wide indirect band gap, AlSb is one of the least discovered of this family of semiconductors. Bulk synthesis of AlSb has been reported on numerous occasions, but obtaining a single phase has always proven to be extremely difficult. This work reports a simple method for the synthesis of single-phase AlSb. Subsequently, consolidation was done into a near single-phase highly dense semiconductor in a form usable for thermoelectric applications. Further, the thermoelectric properties of this system are accounted for the first time. In addition, the mechanical properties of the intermetallic compound are briefly discussed for a possibility of further use.

A facile method to fabricate monolithic alumina–silica aerogels with high surface areas and good mechanical properties

2020 ◽  
Vol 40 (6) ◽  
pp. 2480-2488 ◽  
Author(s):  
Fei Peng ◽  
Yonggang Jiang ◽  
Junzong Feng ◽  
Liangjun Li ◽  
Huafei Cai ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
High Surface ◽  
Silica Aerogels ◽  
Surface Areas ◽  
Monolithic Alumina

scholarly journals Eco-friendly approach for preparation of water-based superhydrophobic silica aerogels via ambient pressure drying

2021 ◽  
Vol 8 (1) ◽  
pp. 015021
Author(s):  
Xiaoling Yuan ◽  
Lihui Xu ◽  
Hong Pan ◽  
Yong Shen ◽  
Liming Wang ◽  
...  
Keyword(s):  
Ambient Pressure ◽  
Silica Aerogels ◽  
Ambient Pressure Drying ◽  
Water Based ◽  
Superhydrophobic Silica

Assembly of silica aerogels within silica nanofibers: towards a super-insulating flexible hybrid aerogel membrane

RSC Advances ◽  
2015 ◽  
Vol 5 (111) ◽  
pp. 91813-91820 ◽  
Author(s):  
Hongxia Zheng ◽  
Haoru Shan ◽  
Ying Bai ◽  
Xianfeng Wang ◽  
Lifang Liu ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Silica Nanoparticle ◽  
Silica Aerogels ◽  
Nanofibrous Scaffold ◽  
Silica Nanofibers ◽  
Insulating Properties ◽  
Hybrid Aerogel

A robust flexible hybrid aerogel membrane with super-insulating properties and improved mechanical properties is developed by forming an interpenetrating silica nanoparticle network inside an electrospun silica nanofibrous scaffold.

Elastic and plastic mechanical properties of nanoparticle-based silica aerogels and xerogels

2021 ◽  
pp. 111569
Author(s):  
Michal Marszewski ◽  
Ali Dashti ◽  
Patricia E. McNeil ◽  
Maggie Fox ◽  
Vivian Wall ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Silica Aerogels

Improved mechanical, physical and biological properties of chitosan films using Aloe vera and electrospun PVA nanofibers for wound dressing applications

2019 ◽  
pp. 152808371986693 ◽  
Author(s):  
Shirin Rafieian ◽  
Hamid Mahdavi ◽  
Mir Esmaeil Masoumi
Keyword(s):  
Mechanical Properties ◽  
Wound Dressing ◽  
Aloe Vera ◽  
Composite Layer ◽  
Synthetic Polymers ◽  
Biological Properties ◽  
Vapor Permeability ◽  
Natural Polymers ◽  
Simple Method ◽  
Chitosan Films

Natural polymers such as chitosan and Aloe vera are widely used in novel wound dressings due to their biocompatibility and biodegradability. A problem associated with these polymers is their poor mechanical behavior. Efforts have been made to improve the mechanical properties by mixing synthetic polymers such as PVA, but the role of chitosan and Aloe vera in the final dressing is dimmed. The techniques are also time-consuming and costly and there is still a need for an acceptable and affordable wound dressing which can be made through easily accessible techniques. A new but very simple method is introduced in this work for incorporating PVA nanofibers with Aloe vera-containing chitosan films. Using this method the levels of Aloe vera and chitosan in the system can be optimized at higher scales while benefiting from PVA best mechanical properties as a composite layer. Higher amounts of Aloe vera and chitosan in the system lead to lower product costs and more biocompability. The biological properties of films were examined through cell cytotoxicity and antibacterial tests and compared with Atomic force microscopy results. Physical and mechanical properties of films containing PVA nanofibers were characterized by water vapor permeability, swelling ratio, and tensile tests. The morphology of fibers before and after applying on the films was also observed by scanning electron microscopy. According to the results, this combination of natural and synthetic polymers has led to an affordable, biocompatible, and flexible film for wound dressing applications.

scholarly journals A Facile Method to Fabricate Anisotropic Extracellular Matrix with 3D Printing Topological Microfibers

Materials ◽  
2019 ◽  
Vol 12 (23) ◽  
pp. 3944 ◽  
Author(s):  
Zhen Gu ◽  
Zili Gao ◽  
Wenli Liu ◽  
Yongqiang Wen ◽  
Qi Gu
Keyword(s):  
Mechanical Properties ◽  
Extracellular Matrix ◽  
Mechanical Characteristics ◽  
Fiber Direction ◽  
Gelatin Matrix ◽  
Simple Method ◽  
Elongation At Break ◽  
Anisotropic Mechanical Properties ◽  
The Matrix ◽  
3D Printed

Natural tissues and organs have different requirements regarding the mechanical characteristics of response. It is still a challenge to achieve biomaterials with anisotropic mechanical properties using an extracellular matrix with biological activity. We have improved the ductility and modulus of the gelatin matrix using 3D printed gelatin microfibers with different concentrations and topologies and, at the same, time achieved anisotropic mechanical properties. We successfully printed flat microfibers using partially cross-linked gelatin. We modified the 10% (w/v) gelatin matrix with microfibers consisting of a gelatin concentration of 14% (w/v), increasing the modulus to about three times and the elongation at break by 39% in parallel with the fiber direction. At the same time, it is found that the microfiber topology can effectively change the matrix ductility, and changing the modulus of the gelatin used in the microfiber can effectively change the matrix modulus. These findings provide a simple method for obtaining active biological materials that are closer to a physiological environment.

Composites of silica aerogels with organics: a review of synthesis and mechanical properties

2019 ◽  
Vol 57 (1) ◽  
pp. 1-23 ◽  
Author(s):  
Kyu-Yeon Lee ◽  
Dinesh B. Mahadik ◽  
Vinayak G. Parale ◽  
Hyung-Ho Park
Keyword(s):  
Mechanical Properties ◽  
Silica Aerogels

How Variability in OSB Mechanical Properties Affects Biological Durability Testing

Holzforschung ◽  
2003 ◽  
Vol 57 (1) ◽  
pp. 8-12
Author(s):  
S. F. Curling ◽  
J. E. Winandy ◽  
C. Carll ◽  
J. A. Micales ◽  
A. A. Tenwolde
Keyword(s):  
Mechanical Properties ◽  
Bending Strength ◽  
Particle Orientation ◽  
Modulus Of Rupture ◽  
Simple Method ◽  
Oriented Strandboard ◽  
Two Samples ◽  
Durability Testing ◽  
Biological Durability ◽  
Tensile Surface

Summary Loss in bending strength of wood has been shown to be a more sensitive measure of decay than is weight loss. Using modulus of rupture as the decay criterion is problematic for oriented strandboard (OSB) because of variation in mechanical properties due to particle orientation and size. Moreover, the small specimen size required for such tests increases the variance in mechanical properties. This study compared the variance in bending strength of ASTM D1037 standard-sized specimens and small specimens from two samples of commercial OSB. The small specimens were found to have a significantly higher level of variance in bending strength than the standard-sized specimens. A simple method of sorting the specimens based on strand orientation on the tensile surface significantly reduced the level of variance measured. The effects of differing levels of variance on the size, design and limitations of the experimental study are presented.

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