Characterization of Natural Fibers and Development of their Usability as New Materials in Future

In this paper, composite materials reinforced with natural fibers were studied, such as: Jute (MC-RY) and Manta (MC-RM) as a proposal for new materials for the manufacture of a prototype for automotive defense. The materials were manufactured as laminates and characterized mechanically through stress, bending, impact and Brinell hardness index tests. The results indicated that both reinforcers improved the mechanical strength of the matrix by up to 71%, as well as the impact energy absorption by 14%. The mechanical properties for MC-RY determined in flexure (bending = 56 MPa, Eflection = 4.16 GPa and maximum = 14 mm) were used to perform an impact simulation in two different models created in SolidWork, the results indicated that the MC-RY could be used for the construction of the defense using 3 layers of this material.

Download Full-text

Characterization of New Materials for Photovoltaic Thin Films: Aggregation Phenomena in Self-Assembled Perylene-Based Diimides

10.21236/ada435695 ◽

2005 ◽

Author(s):

Daniel A. Higgins ◽

Aifang Xie ◽

Bei Liu

Keyword(s):

Thin Films ◽

New Materials ◽

Self Assembled ◽

Aggregation Phenomena

Download Full-text

Thermal Characterization of Recycled Materials for Building Insulation

Energies ◽

10.3390/en14123564 ◽

2021 ◽

Vol 14 (12) ◽

pp. 3564

Author(s):

Arnas Majumder ◽

Laura Canale ◽

Costantino Carlo Mastino ◽

Antonio Pacitto ◽

Andrea Frattolillo ◽

...

Keyword(s):

Environmental Impact ◽

Environmental Sustainability ◽

Building Materials ◽

Raw Materials ◽

Natural Fibers ◽

Thermal Characterization ◽

Recycled Materials ◽

Building Insulation ◽

Operational Phase

The building sector is known to have a significant environmental impact, considering that it is the largest contributor to global greenhouse gas emissions of around 36% and is also responsible for about 40% of global energy consumption. Of this, about 50% takes place during the building operational phase, while around 10–20% is consumed in materials manufacturing, transport and building construction, maintenance, and demolition. Increasing the necessity of reducing the environmental impact of buildings has led to enhancing not only the thermal performances of building materials, but also the environmental sustainability of their production chains and waste prevention. As a consequence, novel thermo-insulating building materials or products have been developed by using both locally produced natural and waste/recycled materials that are able to provide good thermal performances while also having a lower environmental impact. In this context, the aim of this work is to provide a detailed analysis for the thermal characterization of recycled materials for building insulation. To this end, the thermal behavior of different materials representing industrial residual or wastes collected or recycled using Sardinian zero-km locally available raw materials was investigated, namely: (1) plasters with recycled materials; (2) plasters with natural fibers; and (3) building insulation materials with natural fibers. Results indicate that the investigated materials were able to improve not only the energy performances but also the environmental comfort in both new and in existing buildings. In particular, plasters and mortars with recycled materials and with natural fibers showed, respectively, values of thermal conductivity (at 20 °C) lower than 0.475 and 0.272 W/(m⋅K), while that of building materials with natural fibers was always lower than 0.162 W/(m⋅K) with lower values for compounds with recycled materials (0.107 W/(m⋅K)). Further developments are underway to analyze the mechanical properties of these materials.

Download Full-text

Synthesis and Characterization of a Bioconjugate Based on Oleic Acid and L-Cysteine

Polymers ◽

10.3390/polym13111791 ◽

2021 ◽

Vol 13 (11) ◽

pp. 1791

Author(s):

Marco Vizcarra-Pacheco ◽

María Ley-Flores ◽

Ana Mizrahim Matrecitos-Burruel ◽

Ricardo López-Esparza ◽

Daniel Fernández-Quiroz ◽

...

Keyword(s):

Oleic Acid ◽

Materials Science ◽

Critical Micellar Concentration ◽

Synthesis And Characterization ◽

New Materials ◽

Visible Spectroscopy ◽

Amide Bonds ◽

Transmission Electron ◽

Self Assembled

One of the main challenges facing materials science today is the synthesis of new biodegradable and biocompatible materials capable of improving existing ones. This work focused on the synthesis of new biomaterials from the bioconjugation of oleic acid with L-cysteine using carbodiimide. The resulting reaction leads to amide bonds between the carboxylic acid of oleic acid and the primary amine of L-cysteine. The formation of the bioconjugate was corroborated by Fourier transform infrared spectroscopy (FTIR), Raman spectroscopy, and nuclear magnetic resonance (NMR). In these techniques, the development of new materials with marked differences with the precursors was confirmed. Furthermore, NMR has elucidated a surfactant structure, with a hydrophilic part and a hydrophobic section. Ultraviolet-visible spectroscopy (UV-Vis) was used to determine the critical micellar concentration (CMC) of the bioconjugate. Subsequently, light diffraction (DLS) was used to analyze the size of the resulting self-assembled structures. Finally, transmission electron microscopy (TEM) was obtained, where the shape and size of the self-assembled structures were appreciated.

Download Full-text

Characterization of a new natural fiber extracted from Corypha taliera fruit

Scientific Reports ◽

10.1038/s41598-021-87128-8 ◽

2021 ◽

Vol 11 (1) ◽

Author(s):

Taslima Ahmed Tamanna ◽

Shah Alimuzzaman Belal ◽

Mohammad Abul Hasan Shibly ◽

Ayub Nabi Khan

Keyword(s):

Tensile Strength ◽

Natural Fiber ◽

Natural Fibers ◽

Morphological Characteristics ◽

Synthetic Fiber ◽

X Ray Diffraction ◽

Reinforced Composite ◽

Potential Alternative

AbstractThis study deals with the determination of new natural fibers extracted from the Corypha taliera fruit (CTF) and its characteristics were reported for the potential alternative of harmful synthetic fiber. The physical, chemical, mechanical, thermal, and morphological characteristics were investigated for CTF fibers. X-ray diffraction and chemical composition characterization ensured a higher amount of cellulose (55.1 wt%) content and crystallinity (62.5%) in the CTF fiber. The FTIR analysis ensured the different functional groups of cellulose, hemicellulose, and lignin present in the fiber. The Scherrer’s equation was used to determine crystallite size 1.45 nm. The mean diameter, specific density, and linear density of the CTF fiber were found (average) 131 μm, 0.86 g/cc, and 43 Tex, respectively. The maximum tensile strength was obtained 53.55 MPa for GL 20 mm and Young’s modulus 572.21 MPa for GL 30 mm. The required energy at break was recorded during the tensile strength experiment from the tensile strength tester and the average values for GL 20 mm and GL 30 mm are 0.05381 J and 0.08968 J, respectively. The thermal analysis ensured the thermal sustainability of CTF fiber up to 230 °C. Entirely the aforementioned outcomes ensured that the new CTF fiber is the expected reinforcement to the fiber-reinforced composite materials.

Download Full-text

Synthesis and structural and electrical characterization of new materials Bi3R2FeTi3O15

Physica B Condensed Matter ◽

10.1016/j.physb.2011.12.035 ◽

2012 ◽

Vol 407 (16) ◽

pp. 3099-3101 ◽

Cited By ~ 1

Author(s):

O.D. Gil Novoa ◽

D.A. Landínez Téllez ◽

J. Roa-Rojas

Keyword(s):

Electrical Characterization ◽

New Materials

Download Full-text

The Growth and Characterization of Germanium-Carbon Alloy Thin Films

MRS Proceedings ◽

10.1557/proc-270-91 ◽

1992 ◽

Vol 270 ◽

Author(s):

Haojie Yuan ◽

R. Stanley Williams

Keyword(s):

Thin Films ◽

Photoelectron Spectroscopy ◽

Vacuum Chamber ◽

Optical Band Gap ◽

High Vacuum ◽

Optical Absorption Spectroscopy ◽

Alloy Thin Film ◽

New Materials ◽

X Ray

ABSTRACTThin films of pure germanium-carbon alloys (GexC1−x with x ≈ 0.0, 0.2, 0.4, 0.5, 0.6, 0.8, 1.0) have been grown on Si(100) and A12O3 (0001) substrates by pulsed laser ablation in a high vacuum chamber. The films were analyzed by x-ray θ-2θ diffraction (XRD), x-ray photoelectron spectroscopy (XPS), Auger electron spectroscopy (AES), conductivity measurements and optical absorption spectroscopy. The analyses of these new materials showed that films of all compositions were amorphous, free of contamination and uniform in composition. By changing the film composition, the optical band gap of these semiconducting films was varied from 0.00eV to 0.85eV for x = 0.0 to 1.0 respectively. According to the AES results, the carbon atoms in the Ge-C alloy thin film samples has a bonding configuration that is a mixture of sp2 and sp3 hybridizations.

Download Full-text

Fabrication of Ga-templates Using a Focused Ion Beam

MRS Proceedings ◽

10.1557/proc-1228-kk12-10 ◽

2009 ◽

Vol 1228 ◽

Cited By ~ 1

Author(s):

Hao Wang ◽

Greg C. Hartman ◽

Joshua Williams ◽

Jennifer L. Gray

Keyword(s):

Focused Ion Beam ◽

Ion Beam ◽

Processing Conditions ◽

New Materials ◽

Force Microscopy ◽

Atomic Force ◽

Nitridation Process ◽

Microscopy Characterization ◽

Device Technology

AbstractThere are many factors that have the potential to limit significant advances in device technology. These include the ability to arrange materials at shrinking dimensions and the ability to successfully integrate new materials with better properties or new functionalities. To overcome these limitations, the development of advanced processing methods that can organize various combinations of materials at nano-scale dimensions with the necessary quality and reliability is required. We have explored using a gallium focused ion beam (FIB) as a method of integrating highly mismatched materials with silicon by creating template patterns directly on Si with nanoscale resolution. These templates are potentially useful as a means of locally controlling topography at nanoscale dimensions or as a means of locally implanting Ga at specific surface sites. We have annealed these templates in vacuum to study the effects of ion dosage on local Ga concentration and topography. We have also investigated the feasibility of creating Ga nanodots using this method that could eventually be converted to GaN through a nitridation process. Atomic force microscopy and electron microscopy characterization of the resulting structures are shown for a variety of patterning and processing conditions.

Download Full-text

Characterization of polymer concrete with natural fibers

IOP Conference Series Materials Science and Engineering ◽

10.1088/1757-899x/246/1/012033 ◽

2017 ◽

Vol 246 ◽

pp. 012033 ◽

Cited By ~ 1

Author(s):

M Barbuta ◽

A A Serbanoiu ◽

R Teodorescu ◽

B Rosca ◽

R Mitroi ◽

...

Keyword(s):

Natural Fibers ◽

Polymer Concrete

Download Full-text

Obtaining and Characterization of New Materials

Materials ◽

10.3390/ma14216606 ◽

2021 ◽

Vol 14 (21) ◽

pp. 6606

Author(s):

Andrei Victor Sandu

Keyword(s):

Cutting Edge ◽

New Materials ◽

Special Issue

The main objective of this Special Issue was to publish outstanding papers presenting cutting-edge research in the field of new materials and their understanding [...]

Download Full-text