scholarly journals Effects of Plasticizers and Clays on the Physical, Chemical, Mechanical, Thermal, and Morphological Properties of Potato Starch-Based Nanocomposite Films

ACS Omega ◽  
2020 ◽  
Vol 5 (28) ◽  
pp. 17543-17552 ◽  
Author(s):  
Hasanul Banna Muhammad Zukaul Islam ◽  
Md. Abu Bin Hasan Susan ◽  
Abu Bin Imran
Keyword(s):  
Potato Starch ◽  
Nanocomposite Films ◽  
Morphological Properties ◽  
Physical Chemical

Physicochemical properties of starch nanocomposite films enhanced by self-assembled potato starch nanoparticles

LWT ◽  
2016 ◽  
Vol 69 ◽  
pp. 251-257 ◽  
Author(s):  
Suisui Jiang ◽  
Chengzhen Liu ◽  
Xiaojin Wang ◽  
Liu Xiong ◽  
Qingjie Sun
Keyword(s):  
Physicochemical Properties ◽  
Potato Starch ◽  
Nanocomposite Films ◽  
Starch Nanoparticles ◽  
Self Assembled

Recycling of Concentration Tailings of Iron Ore for the Production of Concrete Block (Pavers)

2014 ◽  
Vol 775-776 ◽  
pp. 631-634 ◽  
Author(s):  
Fabiane Leocádia da Silva ◽  
Fernando Gabriel S. Araújo ◽  
Camila G. Castro ◽  
Jefferson J. Mendes ◽  
Fernando L. von Krüger
Keyword(s):  
Mechanical Properties ◽  
Iron Ore ◽  
Concrete Block ◽  
Morphological Properties ◽  
Iron Ore Tailings ◽  
Physical Chemical

This paper studies the technological feasibility of using iron ore tailings as additives in cement pavers for the optimization of the mechanical properties and color modulation.Thus, to study the physical, chemical, optical and morphological properties of the tailings, they were characterized for the composition, mineralogy and granulometry. To optimize the procedure of preparing iron ore tailings as additives in the production of new concrete pavers and to determine their effects on the properties of pavers they, were added in ratios of 0% to 50% in substitution of traditional aggregates. The pavers were characterized for hermeticity and mechanical properties.

scholarly journals Physicochemical and morphological characterization of potato starch (Solanum tuberosum L.) as raw material for the purpose of obtaining bioethanol

2015 ◽  
Vol 33 (2) ◽  
pp. 244-252 ◽  
Author(s):  
Sonia Patricia Lizarazo H. ◽  
Germán Gonzalo Hurtado R. ◽  
Luis Felipe Rodríguez
Keyword(s):  
Potato Starch ◽  
Solanum Tuberosum L ◽  
Potato Crop ◽  
Agricultural Practices ◽  
Morphological Characterization ◽  
Raw Material ◽  
Morphological Properties ◽  
Soil Conditions ◽  
Constant Weight ◽  
Potato Varieties

In Colombia, there are geographic areas where the potato crop is the principal economic product. The diversity of potato varieties, has resulted in differences in sizes and in chemical and physical compositions. These variables are defined by genetic factors, agricultural practices, and climatic and soil conditions. The physical characteristics of the different potato varieties are directly related to aspects of production and performance, unlike the chemical composition and morphology of starch granules, which define the nutritional quality and industrial use. In this research, an analysis of the physicochemical and morphological properties of native starches from six potato varieties was carried out, forming a pilot study for the selection of promising varieties for ethanol production. For this purpose, the samples were dried to constant weight. The ash, amylose and amylopectin contents showed significant differences between the varieties. Similarly, differences were observed in the shape and size of the granules, variables that influenced the gelatinization temperature and viscosity of the final products. These variations in the physicochemical properties and morphology of the starches may affect the use of starch and in the production of ethanol.

scholarly journals Mechanical and Thermal Properties of Self-Assembled Kaolin-Doped Starch-Based Environment-Friendly Nanocomposite Films

2020 ◽  
Vol 4 (2) ◽  
pp. 38
Author(s):  
Md. Ashaduzzaman ◽  
Dipti Saha ◽  
Mohammad Mamunur Rashid
Keyword(s):  
Food Packaging ◽  
Potato Starch ◽  
Testing Machine ◽  
Attenuated Total Reflection ◽  
Nanocomposite Films ◽  
Effect Of Temperature ◽  
Mechanical And Thermal Properties ◽  
Environment Friendly ◽  
The Matrix ◽  
Self Assembled

Environment-friendly advanced materials are promising candidates for the engineering of nanoscience and nanotechnology. Here, starch–kaolin self-assembled nanocomposite films were prepared using potato starch and an indigenous layered material, kaolin. The films consist of kaolin and the matrix, which were prepared by the disruption and plasticization of starch granules with water and glycerol. Self-assembled nanocomposite films with 0%, 5%, 10%, 15%, and 20% w/w of kaolin were fabricated by casting and evaporating the mixture from homogeneous aqueous suspension at 95 °C. The thickness of the film—about 200 μm—was controlled by a predesigned glass frame. The resulting films were conditioned before testing, and the effect of accelerated aging in a moist atmosphere was investigated. The films were characterized using attenuated total reflection infrared (ATR-IR) spectroscopy for the interaction of moieties via function groups, X-ray diffraction (XRD) for crystallinity change, universal testing machine (UTM) for tensile strength Young’s modulus and elongation at break investigation. The thermal stability of the films using thermogravimetric analysis (TGA) and the effect of temperature on contraction behaviors using thermal mechanical analysis (TMA) were carried out. The distribution of kaolin into the matrix and morphology of the self-assembled nanocomposite films were observed from scanning electron microscopy (SEM) images. Developed nanocomposite materials from an indigenous source would play a vital role in the field of food packaging industries in Bangladesh.

scholarly journals Development of Green and Sustainable Cellulose Acetate/Graphene Oxide Nanocomposite Films as Efficient Adsorbents for Wastewater Treatment

Polymers ◽  
2020 ◽  
Vol 12 (11) ◽  
pp. 2501
Author(s):  
Ali Aldalbahi ◽  
Mehrez El-Naggar ◽  
Tawfik Khattab ◽  
Meram Abdelrahman ◽  
Mostafizur Rahaman ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Cellulose Acetate ◽  
Sugarcane Bagasse ◽  
Ethylenediaminetetraacetic Acid ◽  
High Surface ◽  
High Surface Area ◽  
Total Content ◽  
Nanocomposite Films ◽  
Morphological Properties ◽  
Time Range

Novel ecofriendly adsorbents, cellulose acetate/graphene oxide (CA-GO) nanocomposite, were prepared from sugarcane bagasse agro-waste for removing Ni2+ ions from wastewater. Graphene oxide (GO) was prepared by the oxidation of sugarcane bagasse using ferrocene under air atmosphere. Cellulose acetate (CA) was also prepared from sugarcane bagasse by extraction of cellulose through a successive treatments with sulfuric acid (10% v/v), sodium hydroxide (5% w/v), ethylenediaminetetraacetic acid, and hydrogen peroxide, and finally, followed by acetylation. CA-GO was prepared via mixing of GO and CA in the presence of calcium carbonate and different concentrations of GO, including 5, 10, 15, 20, 25, and 30 wt% relative to the weight of CA. The CA-GO nanocomposite showed porous microstructures with high surface area, which enhance their ability towars the adsorption of Ni2+ ions from wastewater. The morphological properties of the prepared adsorbents were explored by scanning electron microscope (SEM) and Fourier-transform infrared spectroscopy (FT-IR). The efficiency of the CA-GO towards the adsorption of Ni2+ ions from wastewater was explored against as time, temperature, and total content of Ni2+ ions. The adsorption measurements of Ni2+ ions were investigated within the concentration range of 10–40 mg/L, time range between 15 and 90 min, and temperature range between 25 °C and 55 °C. The results displayed a considerable improvement in the adsorption process of Ni2+ ions by CA-GO-2 with a removal efficiency of 96.77%. The isotherms were monitored to best fit the Langmuir model. Finally, the adsorption performance of the prepared CA-GO nanocomposite films demonstrated promising properties as green, sustainable and cheap adsorbents for water pollutants.

Changes in pore structure in a no-till chronosequence of silt loam soils, southern Ontario

1999 ◽  
Vol 79 (1) ◽  
pp. 149-160 ◽  
Author(s):  
A. J. VandenBygaart ◽  
R. Protz ◽  
A. D. Tomlin
Keyword(s):  
Soil Profile ◽  
Soil Structure ◽  
Management Practices ◽  
Crop Yields ◽  
Morphological Properties ◽  
Root Penetration ◽  
Short Term ◽  
Physical Chemical ◽  
No Till ◽  
Pore Properties

Many research studies have dealt with the influences of minimum or no-till soil management practices on the major physical, chemical, biological and morphological properties in the soil profile. However little work has been done on the assessment of the rates of changes in pore properties as management practices are converted from conventional to no-till (NT) methods. Short-term changes in soil micromorphology attributed to conversion to no-till from conventionally tilled management are evaluated in this paper. As the number of years in no-till increased there was a decrease in the number pores of 30- to 100-µm diameter in the no-till soils. However, pores from 100- to 500-µm diameter increased in number only after 4 yr of NT. The pores of this size are important for water storage, transmission and root development. The decline in the number of these pores after no-till initiation followed by the increase after 4 yr may explain why crop yields tend to be lower only after the first few years after implementing no-till. The 100- to 500-µm diameter pores may be crucial for the proper development of roots in wheat and corn. The no-till soils had greater numbers of horizontally oriented elongated macropores in the top 5 to 15 cm of the soil profile due to the lack of tillage and annual freeze-thaw processes. These pores may inhibit proper drainage and root penetration. Rounded macropores increased with the number of years the soil was in no-till as these pores were maintained each year due to the lack of tillage and greater faunal activity in the no-till soils. Key words: Micromorphology, image analysis, earthworms, no-till, soil structure

Physical and morphological properties of nanocomposite films based on gelatin and Laponite

2016 ◽  
Vol 124-125 ◽  
pp. 260-266 ◽  
Author(s):  
Germán Ayala Valencia ◽  
Rodrigo Vinicius Lourenço ◽  
Ana Mônica Quinta Barbosa Bittante ◽  
Paulo José do Amaral Sobral
Keyword(s):  
Nanocomposite Films ◽  
Morphological Properties
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