scholarly journals Microstructural and Thermo-Physical Characterization of a Water Hyacinth Petiole for Thermal Insulation Particle Board Manufacture

Materials ◽  
2019 ◽  
Vol 12 (4) ◽  
pp. 560 ◽  
Author(s):  
Adela Salas-Ruiz ◽  
María del Mar Barbero-Barrera ◽  
Trinidad Ruiz-Téllez
Keyword(s):  
Particle Size ◽  
Thermal Insulation ◽  
Water Hyacinth ◽  
Eichhornia Crassipes ◽  
Construction Material ◽  
Chemical Characterization ◽  
Thermal Characterization ◽  
Particle Board ◽  
Global Concern

Water Hyacinth (Eichhornia crassipes) is a dangerous and invasive aquatic species, of which global concern has sharply risen due to its rapid growth. Despite ample research on its possible applications in the construction field, there are no clear references on the optimal use of the plant in finding the most efficient-use building material. In this paper, a microstructural and chemical characterization of the Water Hyacinth petiole was performed, in order to find the most efficient use as a construction material. Subsequently, two types of binder-less insulation panels were developed, with two types of particle size (pulp and staple). A physical, mechanical, and thermal characterization of the boards was performed. These results demonstrated that it is possible to manufacture self-supporting Water Hyacinth petiole panels without an artificial polymer matrix for thermal insulation. The boards showed good thermal conductivity values, ranging from 0.047–0.065 W/mK. In addition, clear differences were found in the properties of the boards, depending on the type of Water Hyacinth petiole particle size, due to the differences in the microstructure.

Extraction, Purification and Characterization of Nanocrystalline Cellulose from Eichhornia crassipes (Mart.) Solms: A Common Aquatic Weed Water Hyacinth

2021 ◽  
pp. 1-12
Author(s):  
Kannan Kilavan Packiam ◽  
Bharani Murugesan ◽  
Pavithra Mettupalayam Kaliyannan Sundaramoorthy ◽  
Harshini Srinivasan ◽  
Keerthika Dhanasekaran
Keyword(s):  
Water Hyacinth ◽  
Eichhornia Crassipes ◽  
Nanocrystalline Cellulose ◽  
Aquatic Weed ◽  
Purification And Characterization

scholarly journals On-Chip Thermal Insulation Using Porous GaN

Proceedings ◽  
2018 ◽  
Vol 2 (13) ◽  
pp. 776 ◽  
Author(s):  
Bogdan F. Spiridon ◽  
Peter H. Griffin ◽  
John C. Jarman ◽  
Yingjun Liu ◽  
Tongtong Zhu ◽  
...  
Keyword(s):  
Thermal Insulation ◽  
High Speed ◽  
Thermal Characterization ◽  
Semiconductor Materials ◽  
3Ω Method ◽  
Theoretical Predictions ◽  
Order Of Magnitude ◽  
On Chip ◽  
Fundamental Requirement

This study focuses on the thermal characterization of porous gallium nitride (GaN) usingan extended 3ω method. Porous semiconductor materials provide a solution to the need for on-chipthermal insulation, a fundamental requirement for low-power, high-speed and high-accuracythermal sensors. Thermal insulation is especially important in GaN devices, due to the intrinsicallyhigh thermal conductivity of the material. The results show one order of magnitude reduction inthermal conductivity, from 130 W/mK to 10 W/mK, in line with theoretical predictions for porousmaterials. This achievement is encouraging in the quest for integrating sensors with opto-, powerandRF-electronics on a single GaN chip.

scholarly journals Processing and Characterization of Silicon Nitride Nanofiber Paper

2013 ◽  
Vol 2013 ◽  
pp. 1-7 ◽  
Author(s):  
Kei-Peng Jen ◽  
Ronald Warzoha ◽  
Ji Guo ◽  
Michael Tang ◽  
Sridhar Santhanam
Keyword(s):  
Silicon Nitride ◽  
Thermal Insulation ◽  
Reduction Process ◽  
Thermal Characterization ◽  
Nitride Phase ◽  
Mechanical Stiffness ◽  
Precursor Material ◽  
Processing Step

Papers of silicon nitride nanofibers were synthesized by a carbothermal reduction process. These nanofiber papers were synthesized in situ and did not require a secondary processing step. The process utilized silica nanopowders and silica gel as the precursor material. Processing geometry played a crucial role in regulating the growth of the nanofiber papers. Characterization of the nanofiber papers indicated that the nanofibers were of the alpha silicon nitride phase. Both mechanical stiffness and strength of the nanofiber papers were measured. Thermal conductivity and specific heat of the papers were also measured and were found to be lower than many common thermal insulation materials at much smaller thicknesses and were comparable to those values that are typically reported for carbon-nanotube-based buckypaper. Results of the mechanical and thermal characterization indicate that these silicon nitride nanofiber papers can be utilized for specialized thermal insulation applications.

scholarly journals Thermal characterization of fibrous aerogel blanket

2019 ◽  
Vol 282 ◽  
pp. 01001 ◽  
Author(s):  
Ákos Lakatos ◽  
Anton Trnik
Keyword(s):  
Thermal Annealing ◽  
Thermal Insulation ◽  
Thermal Characterization ◽  
Insulation Material ◽  
Scanning Calorimetry ◽  
Solid Materials ◽  
Plastic Foams ◽  
Isothermal Heat Treatments ◽  
New Buildings

Nowadays, the application of thermal insulation materials both by the existing and by new buildings is one of the most important actions in order to reduce the energy loss of buildings. Besides the use of the conventional insulations (plastic foams and wool materials) aerogel is one of the most promising thermal insulation material. Aerogels, one of the lightest solid materials available today, are manufactured through the combination of a polymer with a solvent forming a gel. For buildings the fibre reinforced ones are the mainly used types. It is produced by adding the liquid-solid solution to the fibrous batting. In this paper changes in the thermal performance of the aerogel blanket will be followed after thermal annealing. The samples will be put under isothermal heat treatments at 70 °C for 6 weeks, as well as they will be put under thermal treatment at higher temperatures (from 70 °C till 210 °C) for 1 day. The changes in the thermal conductivity will be followed by Holometrix Lambda heat flow meter, as well as, Differential Scanning Calorimetry results will be presented. From the measured values, thermal properties will be calculated. In this paper we will try to clarify the role played by thermal annealing in thermal diffusivity.

scholarly journals Characterization of the High Molecular Weight Cd-Binding Complex in Water Hyacinth (Eichhornia crassipes) When Exposed to Cd

2008 ◽  
Vol 56 (14) ◽  
pp. 5806-5812 ◽  
Author(s):  
Jiann-Shing Wu ◽  
Tzu-Chieh Ho ◽  
Hung-Chi Chien ◽  
Yu-Jen Wu ◽  
Shyh-Mirn Lin ◽  
...  
Keyword(s):  
Molecular Weight ◽  
High Molecular Weight ◽  
Water Hyacinth ◽  
Eichhornia Crassipes

Fabrication and Characterization of Particle Board from Coffee Husk Waste

2019 ◽  
Vol 891 ◽  
pp. 111-116 ◽  
Author(s):  
Nisakorn Nuamsrinuan ◽  
Patcharin Naemchanthara ◽  
Pichet Limsuwan ◽  
Kittisakchai Naemchanthara
Keyword(s):  
Mechanical Properties ◽  
Particle Size ◽  
Wood Particle ◽  
Milling Process ◽  
Particle Board ◽  
Weight Percentage ◽  
Coffee Husk ◽  
Mechanical Properties Testing ◽  
Fabrication And Characterization

The purpose of this research was to fabricate the particle board from the coffee husk. The coffee husk from Chumphon province of Thailand was collected, prepared and separated into four groups such as outer husk, inner husk, the mixture of inner and outer husk and husk from the milling process. The coffee husk particle sheet was formed by the compression molding with the heater. Then the coffee husk particle sheets were the mechanical properties testing. The results showed the coffee husk particle sheet from milling process pass the Thai industrial standard (TIS.876/2547). However, the results of swelling and water absorption indicated that all the coffee husk sheet were not passed the TIS.876/2547. The effect of coffee husk particle size on mechanical properties was clarified. The coffee husk particle sheet from the particle size of 2, 4 and 6 mm was mechanical testing and follow TIS.876/2547. The coffee particle size of 2 mm showed the passing the standard. Moreover, the effect of isocyanate adhesive on mechanical properties was investigated. The weight percentage range of isocyanate adhesive on coffee husk from 7 to 13 %wt was carried out. The weight percentage of 9, 11 and 13 showed according to TIS.876/2547. From the experiment indicated that the coffee husk could be applied to the wood particle board industrial.

scholarly journals Mineralogical and chemical characterization of CDW as function of particle size and thermal treatments for potential recycling

Detritus ◽  
2021 ◽  
pp. 40-50
Author(s):  
Ababaikere Abudureheman ◽  
Paola Stabile ◽  
Michael Robert Carroll ◽  
Carlo Santulli ◽  
Eleonora Paris
Keyword(s):  
Particle Size ◽  
Glass Industry ◽  
Central Italy ◽  
Chemical Characterization ◽  
Mineralogical Composition ◽  
Construction And Demolition Waste ◽  
Thermal Treatments ◽  
Atmospheric Conditions ◽  
Demolition Waste

Construction and Demolition Waste (CDW) originating from the rubble produced by the 2016 seismic events in the Marche Region (Central Italy) has been studied, focusing on its mineralogical and chemical characteristics, to investigate its recycling potentials as a component for eco-sustainable building material or in the glass industry. The aim was to obtain a full characterization of the behaviour of this material at high T in order to determine the most advantageous conditions for vitrification, considered as an effective process for volume reduction as well as for immobilization of potentially hazardous elements. Vitrification experiments, carried out with thermal treatments as function of temperature/duration/particle size and aimed at amorphization, were carried out under atmospheric conditions, at different temperatures (1000-1250°C) and durations (2-8 hours). The study demonstrated that mineralogical composition remains homogeneous for grainsize <4 mm, thus suggesting that no sieving is necessary for recycling of the fine fractions, which are the most difficult to treat. Vitrification, although not achieved for the CDW sample up to 1250°C, due to high-Ca and low-Si contents, demonstrated that this CDW can produce an interesting refractory material and a porous/insulating material. However, experiments showed that full vitrification can be easily achieved by mixing urban waste glass and CDW, suggesting applications in the glass industry. Based on the chemical and mineralogical features of the products, other significant upgrading alternatives of recycling the CDW in different fields of applications are highlighted.

scholarly journals Characterization of Chitosan-Bentonite and Water Hyacinth Plant as a Potential Adsorbent

2018 ◽  
Vol 1 (1) ◽  
pp. 50
Author(s):  
Moondra Zubir ◽  
Hafni Indriati Nasution ◽  
Mutya Fika Safitri ◽  
Agustina Mandasari
Keyword(s):  
Water Hyacinth ◽  
Eichhornia Crassipes ◽  
Xrd Analysis ◽  
Silica Content ◽  
Triclinic Crystal System ◽  
X Ray ◽  
Crystal System ◽  
Infra Red ◽  
Ftir Spectrophotometry

Water hyacinth (Eichhornia crassipes) has a very rapid growth in the waters so it can cause eutrophication. The silica content of 5.56% allows water hyacinth can be utilized as a natural adsorbent. Bentonit has an advantage as an adsorbent because it has an inter-layered structure that can be easily modified with chitosan, resulting in better performance as an eco-friendly adsorbent. This research aims to determine the characterization of chitosan-bentonite and water hyacinth as a adsorbent of Pb(II)removal. Characterization tests were performed using X-ray difraction (XRD) and Fourier Transform Infra Red (FTIR) spectrophotometry. From the results of quantitative XRD analysis can be seen that the adsorbent of chitosan-bentonit and water hyacinth have different adsorbent characteristic, but has the same crystal system that is triclinic crystal system.

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