scholarly journals Pineapple Leaf Fibers (PALF)/ Polyethylene Terephthalate (PET) Electrospun Nanofibers: Effect of Ratio on Chemical & Morphological Properties

2019 ◽  
Vol 9 (1) ◽  
pp. 5631-5638
Keyword(s):  
Polyethylene Terephthalate ◽  
Chemical Properties ◽  
Electrospun Nanofibers ◽  
Morphological Properties ◽  
Optimum Parameters ◽  
Ftir Studies ◽  
Diameter Range ◽  
Average Size ◽  
And Chemical Properties

Nanofibers capabilities in produced small materials up to nanoscale dimension, making them the perfect fundamental materials that can help improving the effectiveness of many applications. In this study, the properties of PALF/PET electrospun mats were studied. Different ratio of PALF/PET were electrospin to determine the optimum parameters for fabricating electrospun PALF/PET with minimum defect. The sample obtained were then characterized for its morphology and chemical properties. FTIR studies were done to understand the interaction occurred between PALF and PET with increasing PALF ratio. From the FTIR result, increasing PALF showed similarities spectra with raw PALF peak at 1100cm-1 indicating the influence of PALF in the fibers. This peak did not appear at low PALF content. The obtaining electrospun mats were observed under FESEM to characterize their morphological properties. Increasing in PALF ratio also attributes to the decreasing of size diameter and diameter range. From the result, PALFPET4 shows the smoother morphology with linear properties and smaller average size diameter.

Using Granulate Composites with Calcined Phosphogypsum and Pet Additive in Asphalting

2022 ◽  
Vol 1049 ◽  
pp. 257-265
Author(s):  
Pavel Borisovich Razgovorov ◽  
Аleksey A. Ignatiev ◽  
Valeriy Michailovich Gotovtsev ◽  
Elena Aleksandrovna Vlasova
Keyword(s):  
Polyethylene Terephthalate ◽  
Raw Materials ◽  
Chemical Properties ◽  
Crushed Rock ◽  
Great Promise ◽  
X Ray Diffraction ◽  
Average Size ◽  
Tropical Climates ◽  
Physical And Chemical ◽  
And Chemical Properties

The paper discusses the change of phosphogypsum surface state produced by Apatit (Cherepovetsky branch, Vologda region) during calcination at 298-1173 K. The authors have determined the average size of its crystallites and studied the atomic composition of raw materials and finished composites that include crushed rock fraction (5-10 mm), oil bitumen, and polyethylene terephthalate additive (1.0-1.2 wt. %). The compounds present in calcined phosphogypsum have been analyzed by X-ray diffraction. The granulate was obtained by pelletizing phosphogypsum with a mixture of the above components. The paper presents the assessment of its physical and chemical properties. The granulated composites based on the specified samples of calcined phosphogypsum, bitumen, and melted polyethylene terephthalate waste show great promise for construction road works in European countries in summer and winter, as well as countries with tropical climates.

New, Highly Structured Carbon Black of the OMCARB Series for Reducing the Hysteresis in Rubber. Part 1. Features of the Structure and Properties of Carbon Black

2016 ◽  
Vol 43 (12) ◽  
pp. 17-22
Author(s):  
G.V. Moiseevskaya ◽  
G.I. Razd'yakonova ◽  
A.A. Petin ◽  
E.A. Strizhak
Keyword(s):  
Carbon Black ◽  
Chemical Properties ◽  
Morphological Characteristics ◽  
Structural Data ◽  
Structure And Properties ◽  
Elastomeric Materials ◽  
Rubber Part ◽  
Average Size ◽  
Branched Structure ◽  
And Chemical Properties

The aim of this work was to study the properties of carbon black CH85 of the OMCARB series and to compare them with the properties of standard carbon blacks N339 and N234. The morphological characteristics, the size distribution of the globules and aggregates, the surface area, the proportion of micropore area, the degree of branching of aggregates, and also the mechanical and chemical properties were measured and calculated. The average size of the aggregates of CH85 is greater than that of N339 and N234, and the aggregates have a more open and branched structure. The iodine adsorption by CH85 is practically the same as that by N339 and lower than that by N234. The low-hysteresis index calculated on the basis of structural data is much better for CH85. This opens up the possibility of using this type of carbon black for the development of elastomeric materials with low hysteresis.

BIOMEDICAL APPLICATIONS OF ELECTROSPUN NANOFIBERS

2020 ◽  
Vol 27 (11) ◽  
pp. 2030001
Author(s):  
ZHANG YANCONG ◽  
DOU LINBO ◽  
MA NING ◽  
WU FUHUA ◽  
NIU JINCHENG
Keyword(s):  
Biomedical Applications ◽  
Three Dimensional ◽  
Chemical Properties ◽  
Electrospun Nanofibers ◽  
High Porosity ◽  
Nanofiber Diameter ◽  
Surface Microscopy ◽  
Different Shapes ◽  
Physical And Chemical ◽  
And Chemical Properties

Electrospun technology is a simple and flexible method for preparation of nanofiber materials with unique physical and chemical properties. The nanofiber diameter is adjustable from several nanometers to few microns during the preparation. Electrospun nanofiber materials are easy to be assembled into different shapes of three-dimensional structures. These materials exhibit high porosity and surface area and can simulate the network structures of collagen fibers in a natural extracellular matrix, thereby providing a growth microenvironment for tissue cells. Electrospun nanofibers therefore have extensive application prospects in the biomedicine field, including in aerospace, filtration, biomedical applications, and biotechnology. Nanotechnology has the potential to revolutionize many fields, such as surface microscopy, silicon fabrication, biochemistry, molecular biology, physical chemistry, and computational engineering, while the advent of nanofibers has increased the understanding of nanotechnology among academia, industry, and the general public. This paper mainly introduces the application of nanofiber materials in tissue engineering, drug release, wound dressing, and other biomedicine fields.

scholarly journals Highlands of the upper Jequitinhonha valley, Brazil: I - characterization and classification

2011 ◽  
Vol 35 (4) ◽  
pp. 1069-1080 ◽  
Author(s):  
Fábio Henrique Alves Bispo ◽  
Alexandre Christofaro Silva ◽  
Pablo Vidal Torrado
Keyword(s):  
Drainage System ◽  
Chemical Properties ◽  
Morphological Properties ◽  
Texture Gradient ◽  
Physical And Chemical Properties ◽  
The Past ◽  
Massive Structure ◽  
Large Plane ◽  
Physical And Chemical ◽  
And Chemical Properties

In the upper Jequitinhonha valley, state of Minas Gerais, Brazi, there are large plane areas known as "chapadas", which are separated by areas dissected by tributaries of the Jequitinhonha and Araçuaí rivers. These dissected areas have a surface drainage system with tree, shrub, and grass vegetation, more commonly known as "veredas", i.e., palm swamps. The main purpose of this study was to characterize soil physical, chemical and morphological properties of a representative toposequence in the watershed of the Vereda Lagoa do Leandro, a swamp near Minas Novas, MG, on "chapadas", the highlands of the Alto Jequitinhonha region Different soil types are observed in the landscape: at the top - Typic Haplustox (LVA), in the middle slope - Xanthic Haplustox (LA), at the footslope - Xanthic Haplustox, gray color, here called "Gray Haplustox" ("LAC") and, at the bottom of the palm swamp - Typic Albaquult (GXbd). These soils were first morphologically described; samples of disturbed and undisturbed soils were collected from all horizons and subhorizons, to evaluate their essential physical and chemical properties, by means of standard determination of Fe, Al, Mn, Ti and Si oxides after sulfuric extraction. The contents of Fe, Al and Mn, extracted with dithionite-citrate-bicarbonate and oxalate treatments, were also determined. In the well-drained soils of the slope positions, the typical morphological, physical and chemical properties of Oxisols were found. The GXbd sample, from the bottom of the palm swamp, is grayish and has high texture gradient (B/A) and massive structure. The reduction of the proportion of crystalline iron compounds and the low crystallinity along the slope confirmed the loss of iron during pedogenesis, which is reflected in the current soil color. The Si and Al contents were lowest in the "LAC" soil. There was a decrease of the Fe2O3/TiO2 ratio downhill, indicating progressive drainage restriction along the toposequence. The genesis and all physical and chemical properties of the soils at the footslope and the bottom of the palm swamp of the "chapadas" of the Alto Jequitinhonha region are strongly influenced by the occurrence of ground water on the surface or near the surface all year long, at present and/or in the past. Total concentrations of iron oxides, Fe d and Fe o in soils of the toposequence studied are related to the past and/or present soil colors and drainage conditions.

scholarly journals Encapsulation of Fatty Oils into Electrospun Nanofibers for Cosmetic Products with Antioxidant Activity

2019 ◽  
Vol 9 (15) ◽  
pp. 2955 ◽  
Author(s):  
Aleksandra Miletić ◽  
Branimir Pavlić ◽  
Ivan Ristić ◽  
Zoran Zeković ◽  
Branka Pilić
Keyword(s):  
Mechanical Properties ◽  
Antioxidant Activity ◽  
Chemical Properties ◽  
Electrospun Nanofibers ◽  
Functional Materials ◽  
Electrospinning Technique ◽  
Active Compounds ◽  
Good Material ◽  
Physical And Chemical ◽  
And Chemical Properties

Active compounds derived from pomegranate and sea-buckthorn were encapsulated into polylactide (PLA-based fibers) and poly(vinyl-pirrolidone) (PVP-based fibers) nanofibers using electrospinning technique. The focus was on the antioxidant activity of prepared nonwovens. Morphology, thermal, and mechanical properties were also examined. Due to the different physical and chemical properties of the basic polymers, the obtained results indicate that PLA-based fibers have better antioxidant activity than PVP-based ones. All prepared samples were formed from bead-less continuous fibers networks, but in the case of PLA-based samples some small irregularities in the structure occurred. Mechanical properties were improved with the addition of active compounds in most of the cases, while thermal properties were slightly affected. Preserved antioxidant activity of active compounds by encapsulation and good material properties significant for manipulation, make these functional materials promising candidates for application in cosmetics.

scholarly journals Morphogenetic features of properties of initial carbonate soils

2013 ◽  
pp. 324-332
Author(s):  
Roman Semashchuk
Keyword(s):  
Chemical Analysis ◽  
Key Words ◽  
Carbonate Rocks ◽  
Chemical Properties ◽  
Morphological Properties ◽  
Physical And Chemical Properties ◽  
Agricultural Plant ◽  
Physical Chemical ◽  
Physical And Chemical ◽  
And Chemical Properties

Results of studies of key morphological, physical-chemical and chemical properties of underdeveloped carbonate soils, which are influenced by woody, herbaceous and agricultural plant formations on eluvium-delluvium carbonate rocks, were given. Key words: initial soils, morphological properties, physical and chemical properties, gross chemical analysis.

scholarly journals Kuat Tekan Dan Tarik Belah Pada Beton Yang Menggunakan Agregat Kasar Limbah Plastik

2021 ◽  
Vol 15 (1) ◽  
pp. 22-28
Author(s):  
Erniati Bachtiar ◽  
◽  
Muh Arief Muzakkir ◽  
Takwin Takwin ◽  
Sri Gusty ◽  
...  
Keyword(s):  
Tensile Strength ◽  
Compressive Strength ◽  
Polyethylene Terephthalate ◽  
Chemical Properties ◽  
Plastic Waste ◽  
Strength Testing ◽  
Aggregate Concrete ◽  
Coarse Aggregates ◽  
Natural Aggregates ◽  
And Chemical Properties

Plastic represent thousands of materials with different physical, mechanical, and chemical properties. As plastic demand and usage increase, it is undeniable that the amount of plastic waste will increase. Plastic has the features of which cannot rot; it does not decompose naturally; it cannot absorb water or cannot rust. So it will eventually cause problems for the environment. This study aims to determine the compressive strength and tensile strength of concrete mixes that use coarse aggregates of plastic waste as a substitute for natural aggregates / broken rocks. There are three variations of samples made with mutations in the type of plastic used, namely PP (Polypropylene) plastic, PET (Polyethylene Terephthalate) plastic, and PP & PET combination plastic. The specimen is cylindrical, with a size of 10 cm x 20 cm. Compressive strength and tensile strength testing is carried out at 28 days according to SNI standards. The results obtained the compressive strength obtained on each variation of standard concrete samples, PP aggregate concrete, PET aggregate concrete, and PP & PET aggregate concrete, respectively, of 21.64 MPa, 10.61 MPa, 8.48 MPa, and 10.18 MPa. Whereas for the splitting tensile strength of standard concrete, PP aggregate concrete, PET aggregate concrete, and PP & PET aggregate concrete respectively were 2.86 MPa, 1.80 MPa, 1.70 MPa, and 1.80 MPa.

Comparison of the variability in a soil taxonomic unit with that of the associated soil mapping unit

Soil Research ◽  
1980 ◽  
Vol 18 (3) ◽  
pp. 285 ◽  
Author(s):  
JA Adams ◽  
RH Wilde
Keyword(s):  
New Zealand ◽  
Soil Type ◽  
Chemical Properties ◽  
Soil Mapping ◽  
Morphological Properties ◽  
Similar Degree ◽  
Silt Loam ◽  
Mapping Unit ◽  
Mapping Units ◽  
And Chemical Properties

The variation in morphological and chemical properties within the Westmere silt loam mapping unit mapped at the soil type level in the Wanganui district of New Zealand is compared with the variation in the same properties in the Westmere silt loam taxonomic unit. Nearly half of the measured morphological properties are similarly distributed in both the taxonomic and mapping unit, while approximately equal proportions of the remaining properties show either leptokurtic (more peaked) distributions or platykurtic (broader) distribution in the taxonomic unit. Chemical properties generally show slightly less variance (as shown by cv values) in the taxonomic unit. Considered overall, a similar degree of variation exists in both the taxonomic and mapping units. This can be explained by the main inclusions within the Westmere silt loam mapping unit being characterized by a range of morphological and chemical properties similar to the Westmere silt loam taxonomic unit and with a similar (or possible lesser) degree of variability.

scholarly journals The study of fly ash filler behaviour in the polymer matrix of polyethyleneterephthalate

2019 ◽  
pp. 28-36
Author(s):  
Tlek Ketegenov ◽  
Natalya Khan ◽  
Olesya Tyumentseva ◽  
Ardak Karagulanova
Keyword(s):  
Electron Microscopy ◽  
Composite Material ◽  
Fly Ash ◽  
Polyethylene Terephthalate ◽  
Polymer Matrix ◽  
Chemical Properties ◽  
Physical And Chemical Properties ◽  
Optical And Electron Microscopy ◽  
Physical And Chemical ◽  
And Chemical Properties

The purpose of the investigation was to study the behavior of mechanically activated fly ash filler containing carbon in a polymer matrix of polyethylene terephthalate (PET). By means of the methods of optical and electron microscopy the change of physical and chemical properties of fly ash after intensive grinding in planetary mills of centrifugal type was considered. The research showed that mechanically activated filler, in contrast to its non-activated analog, structures the polymer matrix and provides improving the characteristics of the composite material.

Statistical criteria of stellar population types

1966 ◽  
Vol 24 ◽  
pp. 101-110
Author(s):  
W. Iwanowska
Keyword(s):  
Stellar Population ◽  
Chemical Properties ◽  
Spectrophotometric Study ◽  
Physical And Chemical Properties ◽  
Population Type ◽  
The Galaxy ◽  
Distribution Parameters ◽  
Physical And Chemical ◽  
Statistical Criteria ◽  
And Chemical Properties

In connection with the spectrophotometric study of population-type characteristics of various kinds of stars, a statistical analysis of kinematical and distribution parameters of the same stars is performed at the Toruń Observatory. This has a twofold purpose: first, to provide a practical guide in selecting stars for observing programmes, second, to contribute to the understanding of relations existing between the physical and chemical properties of stars and their kinematics and distribution in the Galaxy.

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