Characterisation of interfacial adhesion in hemp composites after H2O2 and non-thermal plasma treatments

Interface optimisation for continuous hemp reinforcements in epoxy resin is a current challenge for the development of biocomposites. A chemical treatment based on hydrogen peroxide and a physical one using a non-thermal plasma have been tested to optimise interface adhesion, by varying several parameters. FTIR analysis and FE-SEM observations have shown the effects of the treatments on chemical and morphological aspects of the treated yarns. Tensile tests on hemp yarns have allowed the selection of the treatment parameters leading to the best strength. Fragmentation tests results showed that the two treatments lead to a decrease in the fragment lengths and thus, an enhancement of the Interfacial Shear Strength (IFSS) values in comparison with the untreated yarn. This is confirmed by the micro-CT observations of the debonding lengths in the vicinity of each yarn fragment extremity. Finally, the plasma treated samples exhibit a better interface adhesion quality (IFSS = 44.7 ± 4 MPa) than the chemically treated ones (IFSS = 24.2 ± 4 MPa), which are better than the non-treated ones (IFSS = 13.5 ± 4 MPa).

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Physical and Acoustical Properties of Corn Husk Fiber Panels

Advances in Acoustics and Vibration ◽

10.1155/2016/5971814 ◽

2016 ◽

Vol 2016 ◽

pp. 1-8 ◽

Cited By ~ 5

Author(s):

Nasmi Herlina Sari ◽

I. N. G. Wardana ◽

Yudy Surya Irawan ◽

Eko Siswanto

Keyword(s):

Sound Absorption ◽

Natural Fibers ◽

Physical And Mechanical Properties ◽

Tensile Tests ◽

Scanning Electron Micrographs ◽

Acoustical Properties ◽

Corn Husk ◽

Morphological Aspects ◽

Scanning Electron ◽

Better Than

This research focuses on the development of a sustainable acoustic material comprising natural fibers of corn husk that were alkali modified by 1%, 2%, 5%, and 8% NaOH. The morphology and the acoustical, physical, and mechanical properties of the resulting fibers were experimentally investigated. Five different types of sample were produced in panel form, the acoustical properties of which were studied using a two-microphone impedance tube test. The porosity, tortuosity, and airflow resistivity of each panel were investigated, tensile tests were conducted, and the morphological aspects were evaluated via scanning electron microscopy. The sound absorption and tensile properties of the treated panels were better than those of raw fiber panels; the treated panels were of high airflow resistivity and had low porosity. Scanning electron micrographs of the surfaces of the corn husk fibers revealed that the different sound absorption properties of these panels were due to roughness and the lumen structures.

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Implementasi Voip Server Berbasis IPV6 Dengan Raspberry PI

Manutech : Jurnal Teknologi Manufaktur ◽

10.33504/manutech.v9i01.32 ◽

2019 ◽

Vol 9 (01) ◽

pp. 47-54

Author(s):

Rabbai San Arif ◽

Yuli Fitrisia ◽

Agus Urip Ari Wibowo

Keyword(s):

Internet Protocol ◽

Wireless Transmission ◽

Raspberry Pi ◽

Test Results ◽

Average Delay ◽

Ipv6 Network ◽

Ip Network ◽

Selection Of ◽

Better Than

Voice over Internet Protocol (VoIP) is a telecommunications technology that is able to pass the communication service in Internet Protocol networks so as to allow communicating between users in an IP network. However VoIP technology still has weakness in the Quality of Service (QoS). VOPI weaknesses is affected by the selection of the physical servers used. In this research, VoIP is configured on Linux operating system with Asterisk as VoIP application server and integrated on a Raspberry Pi by using wired and wireless network as the transmission medium. Because of depletion of IPv4 capacity that can be used on the network, it needs to be applied to VoIP system using the IPv6 network protocol with supports devices. The test results by using a wired transmission medium that has obtained are the average delay is 117.851 ms, jitter is 5.796 ms, packet loss is 0.38%, throughput is 962.861 kbps, 8.33% of CPU usage and 59.33% of memory usage. The analysis shows that the wired transmission media is better than the wireless transmission media and wireless-wired.

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Atmospheric pressure Non-Thermal Plasma and its opportunities for treatments of agricultural and food products

Proceedings of the Kuban State Agrarian University ◽

10.21515/1999-1703-85-183-203 ◽

2020 ◽

Vol 1 (85) ◽

pp. 183-203

Author(s):

Daria Petrukhina ◽

Keyword(s):

Thermal Plasma ◽

Atmospheric Pressure ◽

Food Products ◽

Non Thermal Plasma

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Effect of Contact Ratio on Spur Gear Dynamic Load With No Tooth Profile Modifications

Journal of Mechanical Design ◽

10.1115/1.2826905 ◽

1996 ◽

Vol 118 (3) ◽

pp. 439-443 ◽

Cited By ~ 34

Author(s):

Chuen-Huei Liou ◽

Hsiang Hsi Lin ◽

F. B. Oswald ◽

D. P. Townsend

Keyword(s):

Dynamic Load ◽

Spur Gear ◽

Tooth Size ◽

Contact Ratio ◽

Gear Dynamics ◽

Wide Range ◽

Gear Contact ◽

Center Distance ◽

Selection Of ◽

Better Than

This paper presents a computer simulation showing how the gear contact ratio affects the dynamic load on a spur gear transmission. The contact ratio can be affected by the tooth addendum, the pressure angle, the tooth size (diametral pitch), and the center distance. The analysis presented in this paper was performed by using the NASA gear dynamics code DANST. In the analysis, the contact ratio was varied over the range 1.20 to 2.40 by changing the length of the tooth addendum. In order to simplify the analysis, other parameters related to contact ratio were held constant. The contact ratio was found to have a significant influence on gear dynamics. Over a wide range of operating speeds, a contact ratio close to 2.0 minimized dynamic load. For low-contact-ratio gears (contact ratio less than two), increasing the contact ratio reduced gear dynamic load. For high-contact-ratio gears (contact ratio equal to or greater than 2.0), the selection of contact ratio should take into consideration the intended operating speeds. In general, high-contact-ratio gears minimized dynamic load better than low-contact-ratio gears.

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Use of non-thermal plasma in lignocellulosic materials: A smart alternative

Trends in Food Science & Technology ◽

10.1016/j.tifs.2021.01.047 ◽

2021 ◽

Vol 109 ◽

pp. 365-373

Author(s):

Gabriela N. Pereira ◽

Karina Cesca ◽

Anelise Leal Vieira Cubas ◽

Débora de Oliveira

Keyword(s):

Thermal Plasma ◽

Lignocellulosic Materials ◽

Non Thermal Plasma

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Treatment possibilities of electrical discharge non-thermal plasma for industrial wastewater treatment-review

IOP Conference Series Materials Science and Engineering ◽

10.1088/1757-899x/1055/1/012018 ◽

2021 ◽

Vol 1055 (1) ◽

pp. 012018

Author(s):

Ramya Suresh ◽

Baskar Rajoo ◽

Maheswari Chenniappan ◽

Manikandan Palanichamy

Keyword(s):

Wastewater Treatment ◽

Thermal Plasma ◽

Electrical Discharge ◽

Industrial Wastewater ◽

Industrial Wastewater Treatment ◽

Treatment Review ◽

Non Thermal Plasma

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Non-thermal pulsed plasma activated water: environmentally friendly way for efficient surface modification of semiconductor nanoparticles

Green Chemistry ◽

10.1039/d0gc02619k ◽

2021 ◽

Author(s):

Pavel Galář ◽

Josef Khun ◽

Anna Fučíková ◽

Kateřina Dohnalová ◽

Tomáš Popelář ◽

...

Keyword(s):

Surface Modification ◽

Free Surface ◽

Thermal Plasma ◽

Environmentally Friendly ◽

Semiconductor Nanoparticles ◽

Reactive Species ◽

Pulsed Plasma ◽

Non Thermal Plasma ◽

Plasma Activated Water

Non-thermal plasma activated water can be used for cheap, easy and chemicals-free surface modification of nanoparticles, with all the reactive species originating solely in air and water.

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