A high-performance hybrid green composite using plastinated bamboo fillers, with reduced environmental degradation effect

2021 ◽  
pp. 115123
Author(s):  
Daanvir K. Dhir ◽  
Reeghan Osmond ◽  
Kevin Golovin ◽  
Abbas S. Milani
Keyword(s):  
Environmental Degradation ◽  
High Performance ◽  
Green Composite ◽  
Degradation Effect

Interfacial Improvement of Nanophased Jute-Based Green Composite by Surface Modification

2010 ◽  
Author(s):  
Mohammad K. Hossain ◽  
Mohammad W. Dewan ◽  
Muhammad E. Hossain ◽  
Mahesh Hosur ◽  
Shaik Jeelani
Keyword(s):  
Mechanical Properties ◽  
Surface Modification ◽  
High Performance ◽  
Green Composite ◽  
Solution Intercalation ◽  
Chemical Treatments ◽  
Jute Fibers ◽  
Acetic Acid Treatment ◽  
Modified Surface ◽  
Jute Fabrics

The extensive research efforts are currently on progress all over the world to develop and characterize the green composites with high performance at an affordable cost due to the growing environmental awareness. Biodegradable nanophased jute composites were manufactured using chemically treated jute fabrics, Biopol, and nanoclay using compression molding techniques for this study. Nanoclay infusion into the thermoplastic is a challenging issue and was infused using solution intercalation technique. The surface modification of jute fibers was accomplished by performing subsequent chemical treatments such as detergent washing, dewaxing, alkali and acetic acid treatment. The morphology of the modified surface was studied using SEM and FTIR. Thermal performance of the treated fibers was studied using the TGA. The thermal, dynamic mechanical and mechanical properties of biodegradable nanophased jute composites were evaluated by TGA, DMA and flexure test respectively. Enhanced thermal and mechanical properties were observed in modified and nanophased jute biopol composites.

High Performance Green Composites for Green Technologies

2017 ◽  
Vol 742 ◽  
pp. 271-277 ◽  
Author(s):  
Ralf Schledjewski ◽  
Silvia Lloret Pertegas ◽  
Yannick Blößl ◽  
Andrea Anusic ◽  
Katharina Resch-Fauster ◽  
...  
Keyword(s):  
Renewable Resources ◽  
Rotor Blade ◽  
High Performance ◽  
Mechanical Performance ◽  
Natural Fiber ◽  
Fiber Reinforced Polymers ◽  
Green Composite ◽  
Green Technologies ◽  
Hemp Seed ◽  
Thermoset Resin

Composite materials do offer freedom to design a material fitting best to the requirements of a given application. In case of fiber reinforced polymers especially the low weight in combination with other favorable properties, e.g. high mechanical performance, are the driving force for their application. Materials from renewable resources are of high interest if sustainability is aimed. In this paper, in a holistic approach a green composite is aimed to be used in a rotor blade for wind energy production. The challenging topic for this approach is to identify a possibility to gain a thermoset resin being really green, i.e. based on renewable resources and being not critical, e.g. toxic, at any stage of the whole processing chain. For this purpose several different approaches are studied and compared with other solutions based on green resin systems from other resources and conventional petrochemical based resin systems. A hemp seed oil based epoxy resin has been tested successfully. But to be completely free of petrochemicals, bio-based hardener and catalysts are still an open topic. For manufacturing of a rotor blade an infusion process has been used and it was found, a through thickness impregnation of the natural fiber yarn based textile structure results in entrapped air. Only in-plane saturation delivered completely impregnated structures.

scholarly journals Valorization of Linen Processing By-Products for the Development of Injection-Molded Green Composite Pieces of Polylactide with Improved Performance

2020 ◽  
Vol 12 (2) ◽  
pp. 652 ◽  
Author(s):  
Ángel Agüero ◽  
Diego Lascano ◽  
David Garcia-Sanoguera ◽  
Octavio Fenollar ◽  
Sergio Torres-Giner
Keyword(s):  
High Performance ◽  
Food Packaging ◽  
Raw Materials ◽  
Linseed Oil ◽  
Green Composites ◽  
Green Composite ◽  
Melt Mixing ◽  
Linum Usitatissimum L ◽  
Improved Performance ◽  
By Products

This work reports the development and characterization of green composites based on polylactide (PLA) containing fillers and additives obtained from by-products or waste-streams from the linen processing industry. Flaxseed flour (FSF) was first produced by the mechanical milling of golden flaxseeds. The resultant FSF particles were melt-compounded at 30 wt% with PLA in a twin-screw extruder. Two multi-functionalized oils derived from linseed, namely epoxidized linseed oil (ELO) and maleinized linseed oil (MLO), were also incorporated during melt mixing at 2.5 and 5 parts per hundred resin (phr) of composite. The melt-compounded pellets were thereafter shaped into pieces by injection molding and characterized. Results showed that the addition of both multi-functionalized linseed oils successfully increased ductility, toughness, and thermal stability of the green composite pieces whereas water diffusion was reduced. The improvement achieved was related to both a plasticizing effect and, more interestingly, an enhancement of the interfacial adhesion between the biopolymer and the lignocellulosic particles by the reactive vegetable oils. The most optimal performance was attained for the MLO-containing green composite pieces, even at the lowest content, which was ascribed to the higher solubility of MLO with the PLA matrix. Therefore, the present study demonstrates the potential use of by-products or waste from flax (Linum usitatissimum L.) to obtain renewable raw materials of suitable quality to develop green composites with high performance for market applications such as rigid food packaging and food-contact disposable articles in the frame of the Circular Economy and Bioeconomy.

Study on Service Life of OPC and HPC in Marine Environment

2019 ◽  
Vol 805 ◽  
pp. 161-169
Author(s):  
Hao Yu Chen
Keyword(s):  
Service Life ◽  
Marine Environment ◽  
High Performance ◽  
High Performance Concrete ◽  
Chloride Ion ◽  
Ion Concentration ◽  
Portland Cement Concrete ◽  
Tidal Zone ◽  
Environment Exposure ◽  
Degradation Effect

In this paper, ordinary Portland cement concrete (OPC) and high performance concrete (HPC) were used in the marine environment exposure experiments, Using the second Fick’s law, five parameter of life prediction model-binding ability, diffusion coefficient of free C1- time dependent parameters, chloride ion concentration of surface and degradation effect coefficients are confirmed. The service life of OPC and HPC in ocean conditions is calculated and compared using mathematic software in atmosphere region, underwater region and tidal zone.

scholarly journals Environmental Degradation Effect on the Properties of Bi-2212 Highly Textured Rods

2012 ◽  
Vol 26 (4) ◽  
pp. 895-900 ◽  
Author(s):  
J. C. Diez ◽  
G. Constantinescu ◽  
S. Rasekh ◽  
L. C. Estepa ◽  
M. A. Madre ◽  
...  
Keyword(s):  
Environmental Degradation ◽  
Degradation Effect

A High Performance Energy Analyzer for Use in Electron Scanning Microscopy

1969 ◽  
Vol 27 ◽  
pp. 14-15
Author(s):  
A. V. Crewe ◽  
M. Isaacson ◽  
D. Johnson
Keyword(s):  
High Performance ◽  
Vertical Plane ◽  
Median Plane ◽  
Electron Gun ◽  
Uniform Field ◽  
Loss Mechanism ◽  
Electron Scanning Microscopy ◽  
Sector Type ◽  
Double Focusing ◽  
Electron Energy Loss

A double focusing magnetic spectrometer has been constructed for use with a field emission electron gun scanning microscope in order to study the electron energy loss mechanism in thin specimens. It is of the uniform field sector type with curved pole pieces. The shape of the pole pieces is determined by requiring that all particles be focused to a point at the image slit (point 1). The resultant shape gives perfect focusing in the median plane (Fig. 1) and first order focusing in the vertical plane (Fig. 2).

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