scholarly journals Investigation of the Mechanical and Liquid Absorption Properties of a Rice Straw-Based Composite for Ayurvedic Treatment Tables

Materials ◽  
2022 ◽  
Vol 15 (2) ◽  
pp. 606
Author(s):  
Abhishek Sadananda Madival ◽  
Deepak Doreswamy ◽  
Shripathi Adiga Handady ◽  
Krishna Raghava Hebbar ◽  
Shobha Karabylu Lakshminarayana

Managing rice crop stubble is one of the major challenges witnessed in the agricultural sector. This work attempts to investigate the physical, mechanical, and liquid absorption properties of rice straw (RS)-reinforced polymer composite for assessing its suitability to use as an ayurvedic treatment table. This material is expected to be an alternative for wooden-based ayurvedic treatment tables. The results showed that the addition of rice straw particles (RSp) up to 60% volume in epoxy reduced the density of the composite material by 46.20% and the hardness by 15.69%. The maximum tensile and flexural strength of the RSp composite was 17.53 MPa and 43.23 MPa, respectively. The scanning electron microscopy (SEM) analysis showed deposits of silica in the form of phytoliths in various size and shapes on the outer surface of RS. The study also revealed that the water absorption rate (WA) was less than 7.8% for the test samples with 45% volume of RSp. Interestingly the test samples showed greater resistance to the absorption of Kottakal Dhanvantaram Thailam (<2%). In addition, the developed samples showed resistance towards bacterial and fungal growth under the exposure of treatment oils and water.

2018 ◽  
Vol 25 (3) ◽  
pp. 571-578 ◽  
Author(s):  
Prashant Srivastava ◽  
Shishir Sinha

Abstract This research work investigated the effect of fiber loading and alkali treatment on hair fiber (HF)-reinforced high-density polyethylene (HDPE) composites in terms of mechanical properties and water absorption behavior. The mechanical stability of the composite material was studied by Universal Testing Machine. The alkali treatment of HF-reinforced HDPE composites was responsible for the investigation of the mechanical and water absorption properties. Fourier transform infrared (FTIR) spectroscopy and scanning electron microscopy (SEM) analysis were also done for the study of the reinforced polymer composites. The results of the SEM analysis were very helpful for the study of the morphology of the fiber-matrix interface for better/optimum mechanical properties.


2018 ◽  
Vol 3 (2) ◽  
Author(s):  
Eryani . ◽  
Sri Aprilia ◽  
Farid Mulana

<p>Agricultural waste such as rice straw, rice husk and rice husk ash have not been utilized properly. This waste of agricultural produce can actually be used as an alternative to bionanofiller because it contains an excellent source of silica. The silica content contained in the rice waste when combined with the polymer matrix can produce composites having high thermal and mechanical properties. Characterization of bionanofiller from this rice waste is done by SEM, XRF, FTIR, XRD and particle density. The result of SEM analysis from this rice waste is feasible to be used as filler because it has size 1 μm. Likewise with the results of XRF analysis that rice waste contains a high enough silica component that is 80.6255% - 89.83%. FTIR test results also show that bionanoparticles from rice waste have the same content of silica. In the XRD analysis the best selective gain of rice waste is found in rice husk ash which is characteristic of amorp silica at a range of 2ϴ = 22<br />. The largest density analysis of paddy waste was found in rice husk 0.0419 gr / cm , followed by rice straw by of 0.0417 gr / cm 3 and rice hulk ash 0.0407 g / cm 3</p>


2018 ◽  
Vol 33 (2) ◽  
pp. 279-296 ◽  
Author(s):  
Sami-Seppo Ovaska ◽  
Kaj Backfolk

Abstract This paper reviews the use of the Bristow Absorption Tester (known also as the Bristow wheel) in the characterization of fiber-based substrates. The Bristow wheel is a laboratory-scale instrument that has been designed for studying substrate wettability and dynamic liquid absorption properties in short time intervals, which are important in many converting and printing processes of paper and paperboard. The tester also gives information about substrate roughness. The Bristow wheel has shown great usefulness in predicting print quality especially in inkjet applications, in which a good correlation between print quality (letter area) and ink penetration rate has been found by several researchers. The apparatus is particularly useful in dynamic wetting studies, but it has also been successfully used in numerous other research purposes such as the determination of the degree of sizing, evaluation of material glueability, and various coatability studies. Modifications of both the testing principle and the tester structure have also been reported. These include e. g. equipping the apparatus with a corona unit that makes it possible to mimic a printing process on a relevant time-scale. This review summarizes the reported applications of Bristow wheel with a special focus on tester performance and versatility.


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.


2018 ◽  
Vol 4 (3) ◽  
pp. 251-258
Author(s):  
Obydul Islam ◽  
Somaya Akter ◽  
Md Ahidul Islam ◽  
Dewan Kamruzzaman Jamee ◽  
Rokibul Islam Khan

The use of poultry droppings as a feed ingredient may not only reduce waste and environmental pollution but also provide inexpensive feed components for ruminants. An experiment was conducted to prepare wastelage in the field laboratory of Animal Science Department, Bangladesh Agricultural University, Mymensingh. Rice straw (Oryza sativa L.) was mixed with 0%, 10%, 20% and 30% caged layer excreta (CLE) and 5% molasses in each treatment on dry matter (DM) basis and ensiled in air tight container under room temperature. After 60 days, ensiled mixture was opened. All the wastelage had desirable smell, light brownish color, soft texture and no fungal growth was found. Results revealed that PH, DM, crude protein (CP), crude fiber (CF), ash, in vitro organic matter digestibility and metabolizable energy were significantly (p<0.05) influenced by different levels of CLE. The highest CP (5.97g/100g DM) was observed in wastelage with 30% CLE (p<0.05) followed by 20% and 10% CLE. The PH level, DM, Ash and CF contents were decreased linearly (p<0.05) from 4.8 to 4.11, 78.00 to 55.63, 25.08 to 17.70 and 22.57 to 14.95%, respectively as the level of CLE increased from 0 to 30%. In all treatments, EE content was not significantly influenced by the different level of CLE. The in vitro organic matter digestibility (IVOMD) and metabolizable energy (ME) also increased significantly (p<0.05) with the increased level of CLE and maximum value (57.51%, and 8.12 MJ/Kg DM, respectively) was obtained in wastelage with 10% CLE, which is statistically identical with 20% CLE. Therefore, it could be speculated that ensiling rice straw with up to 20% CLE improved the feeding value of wastelage.Asian J. Med. Biol. Res. September 2018, 4(3): 251-258


2004 ◽  
Vol 18 (17n19) ◽  
pp. 2708-2712
Author(s):  
MAO-BIN HU ◽  
XIANG-ZHAO KONG ◽  
QING-SONG WU ◽  
ZHEN-GANG ZHU

The low frequency vibration energy absorption properties of granular materials have been investigated on an Invert Torsion Pendulum (ITP). The energy absorption rate of granular material changes nonlinearly with amplitude under low frequency vibration. The frequency of ITP system increases a little with granular materials in the holding cup. The vibration frequency of ITP system does not change with time.


2012 ◽  
Vol 20 ◽  
pp. 11-20 ◽  
Author(s):  
Geovana Dagostim Savi ◽  
Marcos Marques da Silva Paula ◽  
Jonathann Corrêa Possato ◽  
Tatiana Barichello ◽  
Denise Castagnaro ◽  
...  

Gold nanoparticles (GNP) were synthesized, characterized and their antifungal activities investigated against three pathogenic fungi of different genera and species (Fusarium verticillioides,Penicillium citrinumandAspergillus flavus). The anti-fungi treatments efficiency of the GNP (concentrations: 0, 0.05, 0.1 and 0.2 mg L-1in PDA media) were evaluated at 2, 4, 6 and 8 days after incubation by measuring the diameter of fungal colonies and investigating fungi structure alterations by scanning electron microscopy (SEM). It was observed that the GNP concentration increased, fungal colony growth diameter reduced. However, the highest GNP concentration applied in the experiment was not able to completely inhibit fungal growth. The SEM analysis of the fungi structure Au treated showed damaged hyphae and unusual bulges that were not observed in fungi that growth on medium without treatment (Control). Although up to the highest concentration of GNP media applied did not completely inhibited fungi growth, the hyphae modifications led growth reduction which could influence the toxins production by these fungi.


2018 ◽  
Vol 49 (5) ◽  
pp. 597-620 ◽  
Author(s):  
S Ramakrishnan ◽  
K Krishnamurthy ◽  
R Rajasekar ◽  
G Rajeshkumar

This study deals with the investigation of the mechanical and water absorption properties of jute fibre reinforced epoxy composites prepared by using hand layup method. The effects of fibre length (10, 20, 30 and 40 mm), fibre weight fraction (0%, 5%, 10%, 15%, 20% and 25%), concentration of NaOH treatment (5% and 10%) and nano-clay addition (1, 3, 5 and 7 wt%) on the aforementioned properties were determined. Morphological characterisation was performed for the tensile and flexural fractured surface of the specimens to study their microstructural failures. The results revealed that the composites reinforced with 5% of NaOH-treated fibre and 5 wt% of nano-clay exhibited higher tensile, flexural and impact strengths of 103.05 MPa, 162.8 MPa and 0.358 kJ/mm2 respectively, and lower water absorption rate. Moreover, the optimum fibre length and fibre weight fraction were found to be 30 mm and 20% respectively for better overall properties. These composites can be used for light and medium load applications.


2014 ◽  
Vol 2 (15) ◽  
pp. 5516-5524 ◽  
Author(s):  
Yun-Zhao Wei ◽  
Guang-Sheng Wang ◽  
Yun Wu ◽  
Yong-Hai Yue ◽  
Jun-Tao Wu ◽  
...  

The brick–mortar structure CuS/PVDF nanocomposite films with enhanced absorption properties were fabricated based on the selectively synthesized CuS hexagonal nanoplatelets and PVDF.


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