Contributions of the nanovoid structure to the moisture absorption properties of epoxy resins

Author(s):  
Christopher L. Soles ◽  
Fernando T. Chang ◽  
Brett A. Bolan ◽  
Hristo A. Hristov ◽  
David W. Gidley ◽  
...  
2021 ◽  
pp. 152808372110575
Author(s):  
Adnan Amjad ◽  
Aslina Anjang Ab Rahman ◽  
Habib Awais ◽  
Mohd Shukur Zainol Abidin ◽  
Junaid Khan

Composite holds great promise for future materials considering its advantages such as excellent strength, stiffness, lightweight, and cost-effectiveness. Due to rising environmental concerns, the research speed gradually changes from synthetic polymer composites to natural fibre reinforced polymer composites (NFRPCs). Natural fibres are believed a valuable and robust replacement to synthetic silicates and carbon-based fibres, along with biodegradability, recyclability, low cost, and eco-friendliness. But the incompatibility between natural fibre and polymer matrices and higher moisture absorption percentage of natural fibre limitise their applications. To overcome these flaws, surface treatment of natural fibre and nanofiller addition have become some of the most important aspects to improve the performance of NFRPCs. This review article provides the most recent development on the effect of different nanofiller addition and surface treatment on the mechanical, thermal, and wetting behaviour of NFRPCs. It concludes that the fibre surface treatment and nanofillers in natural fibre polymer composites positively affect mechanical, thermal and water absorption properties. A systematic understanding in this field covers advanced research basics to stimulate investigation for fabricating NFRPCs with excellent performance.


Author(s):  
Nikhil Gupta ◽  
Eyassu Woldesenbet

Abstract Close cell structured foams are made by incorporation of cenospheres in polymeric materials. Low moisture absorption characteristics and considerably higher compressive strength of these materials compared to open cell structured foams make them suitable for use as core materials in sandwich structured materials. Incorporation of cenospheres in the epoxy resins enhances their impact strength and damage tolerance, especially if these materials are used in sandwich configurations. Present study analyzes and compares the effect of incorporation of cenospheres like flyash and glass microballoons in the epoxy resins on the deformation and fracture behavior of the material. Approach based on determination of local stress intensity factors is used to obtain estimate of the stresses in the material.


2014 ◽  
Vol 53 ◽  
pp. 270-281 ◽  
Author(s):  
Kazi M. Zakir Hossain ◽  
Andrew J. Parsons ◽  
Chris D. Rudd ◽  
Ifty Ahmed ◽  
Wim Thielemans

2009 ◽  
Vol 610-613 ◽  
pp. 81-84
Author(s):  
Chun Xiao Zhang ◽  
Fu Chen Bai ◽  
Xi Yao Zhang ◽  
Jian Liu ◽  
Wan Xi Zhang

Moisture-absorbent poly- (acrylate-co-methacrylate) was synthesized by solution polymerization, using N,N’-methylene bisacrylamide as the crossinglinking agent, sodium bisulfate and ammonium persulfate as the initiator. The moisture absorption properties of the copolymer in different temperatures and humidities have been systematically studied. Experimental results indicated that the moisture absorption behavior has been enhanced with the increase amount of methacrylate. Under different relative humidity, the moisture adsorption ability was distinct. When the relative moisture reached 40%, the humidity behavior became less evident. As the increase of moisture, the absorbency for moisture improves correspondingly. When the relative moisture get to 90%, the properties of this copolymer was obviously improved compared with the traditional materials, such as silica gel and molecular sieve.


2013 ◽  
Vol 821-822 ◽  
pp. 139-143
Author(s):  
Li Yang ◽  
Song Mei Bi ◽  
Lei Zhou ◽  
Ying Feng Wang

In order to compare differences between the structure and properties of pupa protein fiber and rousi fiber ,test morphology and molecular structure of fiber by using optical microscope, X ray diffraction, fourier transform infrared spectroscopy (FT-IR) . The results show that:the two kinds of fiber morphology consistent with the ordinary viscose, the pupa protein fiber crystallinity and degree of orientation are higher than the rousi fiber, and rousi fibers contain small amounts of metal elements, the pupa protein fiber mechanical properties, moisture absorption properties and heat resistance are superior to rousi fiber.


2013 ◽  
Vol 19 (1) ◽  
Author(s):  
Rosita NORVAIŠIENĖ ◽  
Gintarė GRICIUTĖ ◽  
Raimondas BLIŪDŽIUS ◽  
Juozas RAMANAUSKAS

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