scholarly journals BIOPLASTIC PRODUCTION USING CORN STARCH WITH NATURAL FILLERS AND ITS SEM-EDS REPORT

2021 ◽  
Vol 21 (no 1) ◽  
Author(s):  
S. Sharmila ◽  
P. Ravi Teja ◽  
D. Vijay Chandra Gangadhar Gupta ◽  
P. Kaviya Lakshmi ◽  
R. Kamalambigeswari ◽  
...  
Keyword(s):  
Environmental Impacts ◽  
Diethyl Ether ◽  
Corn Starch ◽  
Morphological Characteristics ◽  
Biodegradable Plastics ◽  
Crystal Formation ◽  
Folding Endurance ◽  
Commercial Applications ◽  
Natural Fillers

Due to the negative environmental impacts of synthetic plastics, the development of biodegradable plastics for both industrial and commercial applications is essential today. Researchers have developed various starch-based composites for different applications. The present work investigates the corn starch based bio plastic with filler. Glycerol was used as a plasticizing agent. Different parameters such as elongation, solubility in different solvents such as chloroform, ethanol, water, diethyl ether and folding endurance were tested. Morphological characteristics of produced bio plastic was also analyzed by SEM-EDS. Results showed that the bio plastics were completely soluble in water and partially soluble in ethanol, diethyl ether and chloroform and it has only one folding ability. SEM report shows that the surface is homogenous and crystal formation is visible.

scholarly journals Modern Biodegradable Plastics—Processing and Properties Part II

Materials ◽  
2021 ◽  
Vol 14 (10) ◽  
pp. 2523
Author(s):  
Janusz W. Sikora ◽  
Łukasz Majewski ◽  
Andrzej Puszka
Keyword(s):  
Water Vapor ◽  
Rotational Speed ◽  
Corn Starch ◽  
Potato Starch ◽  
Reference Sample ◽  
Film Surface ◽  
Barrier Properties ◽  
Processing Parameters ◽  
Biodegradable Plastics ◽  
Film Blowing

Four different plastics were tested: potato starch based plastic (TPS-P)–BIOPLAST GF 106/02; corn starch based plastic (TPS-C)–BioComp BF 01HP; polylactic acid (polylactide) plastic (PLA)—BioComp BF 7210 and low density polyethylene, trade name Malen E FABS 23-D022; as a petrochemical reference sample. Using the blown film extrusion method and various screw rotational speeds, films were obtained and tested, as a result of which the following were determined: breaking stress, strain at break, static and dynamic friction coefficient of film in longitudinal and transverse direction, puncture resistance and strain at break, color, brightness and gloss of film, surface roughness, barrier properties and microstructure. The biodegradable plastics tested are characterized by comparable or even better mechanical strength than petrochemical polyethylene for the range of film blowing processing parameters used here. The effect of the screw rotational speed on the mechanical characteristics of the films obtained was also demonstrated. With the increase in the screw rotational speed, the decrease of barrier properties was also observed. No correlation between roughness and permeability of gases and water vapor was shown. It was indicated that biodegradable plastics might be competitive for conventional petrochemical materials used in film blowing niche applications where cost, recyclability, optical and water vapor barrier properties are not critical.

scholarly journals Effect of Dual Modification on the Spectroscopic, Calorimetric, Viscosimetric and Morphological Characteristics of Corn Starch

Polymers ◽  
2019 ◽  
Vol 11 (2) ◽  
pp. 333 ◽  
Author(s):  
Ulin Basilio-Cortés ◽  
Leopoldo González-Cruz ◽  
Gonzalo Velazquez ◽  
Gerardo Teniente-Martínez ◽  
Carlos Gómez-Aldapa ◽  
...  
Keyword(s):  
Acid Hydrolysis ◽  
Short Range ◽  
Corn Starch ◽  
Morphological Characteristics ◽  
Industrial Applications ◽  
Peak Time ◽  
Starch Granules ◽  
Scanning Calorimetry ◽  
Pasting Temperature ◽  
Ftir And Raman Spectroscopy

The effect of dual modification of corn starch, including hydrolysis and succinylation, were evaluated through peak viscosity (PV) analysis, differential scanning calorimetry (DSC), scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR) and Raman spectroscopy. This dual modification was shown to increase the reaction efficiency (RE) and degree substitution (DS) compared with starches that were not subjected to acid hydrolysis pretreatment with a 44% and 45% increase respectively. After acid hydrolysis pretreatment, the surface of the corn starch granules exhibited exo-erosion and whitish points due to the accumulation of succinyl groups. The peak viscosity was reduced significantly with the acid hydrolysis pretreatment (between 3 and 3.5-fold decrease), which decreased the pasting temperature and peak time to 20 °C and 100 s respectively. In addition, the dual modification of corn starch altered certain thermal properties, including a reduction in the enthalpy of gelatinization (ΔH) and a higher range of gelatinization (around 6 °C), which may effectively improve industrial applications. Modifications on the FTIR spectra indicated that the dual modification affected the starch crystallinity, while the Raman spectra revealed that the dual modification disrupted the short-range molecular order in the starch. Rearrangement and molecular destabilization of the starch components promoted their granular amphiphilic properties.

scholarly journals Contributions for Producing Biodegradabile Shock Absorbent Packaging

2010 ◽  
Vol 67 (2) ◽  
Author(s):  
Nicolae CIOICA ◽  
Maria TOMOAIA-COTIŞEL ◽  
Mihaela NAGY ◽  
Ossi HOROVITZ ◽  
Constantin COŢA
Keyword(s):  
Large Class ◽  
Corn Starch ◽  
Biodegradable Plastics ◽  
Technological Parameters ◽  
Technical Requirements ◽  
Research Institutes ◽  
Manufacture Process ◽  
Starch Extrusion ◽  
Loose Fill

Making biodegradable plastics is a concern of recent years, research in this field from universities, research institutes and enterprises are continuously developing. Biodegradable loose fill shock absorbent packaging are also part of the large class of biodegradable plastics and it is necessary for them to ensure, besides biodegradability, a number of technical requirements deriving from their utilization purposes: protection of breakable products during handling and transport. Packaging properties depends on both the type and proportion of materials that are part of the formula and the technology used in its manufacture, process characterized by certain technological parameters. This paper presents some results obtained making a biodegradable loose fill packaging by corn-starch extrusion in the presence of plasticizers.

scholarly journals Modern Biodegradable Plastics—Processing and Properties: Part I

Materials ◽  
2020 ◽  
Vol 13 (8) ◽  
pp. 1986 ◽  
Author(s):  
Janusz Sikora ◽  
Łukasz Majewski ◽  
Andrzej Puszka
Keyword(s):  
Mass Flow Rate ◽  
Mass Flow ◽  
Flow Rate ◽  
Corn Starch ◽  
Blow Up ◽  
Potato Starch ◽  
Biodegradable Plastics ◽  
Scanning Calorimetry ◽  
Melt Flow Rate ◽  
Plastic Films

This paper presents a characterization of a plastic extrusion process and the selected properties of three biodegradable plastic types, in comparison with LDPE (low-density polyethylene). The four plastics include: LDPE, commercial name Malen E FABS 23-D022; potato starch based plastic (TPS-P), BIOPLAST GF 106/02; corn starch based plastic (TPS-C), BioComp®BF 01HP; and a polylactic acid (polylactide) plastic (PLA), BioComp®BF 7210. Plastic films with determined geometric parameters (thickness of the foil layer and width of the flattened foil sleeve) were produced from these materials (at individually defined processing temperatures), using blown film extrusion, by applying different extrusion screw speeds. The produced plastic films were tested to determine the geometrical features, MFR (melt flow rate), blow-up ratio, draw down ratio, mass flow rate, and exit velocity. The tests were complemented by thermogravimetry, differential scanning calorimetry, and chemical structure analysis. It was found that the biodegradable films were extruded at higher rate and mass flow rate than LDPE; the lowest thermal stability was ascertained for the film samples extruded from TPS-C and TPS-P, and that all tested biodegradable plastics contained polyethylene.

scholarly journals Preparation and Characterization of Functional Films Based on Chitosan and Corn Starch Incorporated Tea Polyphenols

Coatings ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 817
Author(s):  
Lepeng Gao ◽  
Tao Zhu ◽  
Fuyang He ◽  
Zhiqiang Ou ◽  
Jian Xu ◽  
...  
Keyword(s):  
Moisture Content ◽  
Water Solubility ◽  
Corn Starch ◽  
Morphological Characteristics ◽  
Tea Polyphenols ◽  
Infrared Spectrometry ◽  
X Ray Diffraction ◽  
Blend Films ◽  
The Stability ◽  
Water Swelling

The functional films based on chitosan and corn starch incorporated tea polyphenols were developed through mixing the chitosan and starch solution and the powder of tea polyphenols by the casting method. The objective of this research was to investigate the effect of different concentrations of tea polyphenols on the functional properties of the films. Attenuated total reflectance Fourier transform infrared spectrometry and X-ray diffraction were used to investigate the potential interactions among chitosan, corn starch and tea polyphenols in the blend films. Physical properties of the blend films, including density, moisture content, opacity, color, water solubility and water swelling, as well as morphological characteristics, were measured. The results demonstrated that the incorporation of tea polyphenols caused the blend films to lead to a darker appearance. The water solubility of the blend film increased with the increase of tea polyphenol concentrations, while moisture content and swelling degree decreased. The hydrogen bonding between chitosan, starch and tea polyphenols restricted the movement of molecular chains and was helpful to the stability of the blend films. The results suggested that these biodegradable blend films could potentially be used as packaging films for the food and drug industries to extend the shelf life to maintain their quality and safety.

scholarly journals Characterisation and tracking changes of morphological characteristics in honey bee, Apis mellifera, colonies

2015 ◽  
Vol 47 (3) ◽  
pp. 103
Author(s):  
H.F. Abou-Shaara ◽  
M.E. Ahmed
Keyword(s):  
Apis Mellifera ◽  
Environmental Factors ◽  
Environmental Impacts ◽  
Honey Bee ◽  
Honey Bees ◽  
No Reduction ◽  
Morphological Characteristics ◽  
Current State ◽  
Honey Bee Workers ◽  
Colony Productivity

Measuring morphological characteristics of honey bee, <em>Apis mellifera</em>, at different times is important to assess the degree of race purity, to predict colony productivity, and to understand environmental impacts on honey bees. The study aims to characterise current honey bees of Northwest Egypt, namely El-Behera governorate, and to track occurred changes to their morphological characteristics since 2007. Samples of honey bee workers were collected from four districts in El- Behera governorate. Nine body and six wing characteristics were measured. Morphological characteristics of honey bees belonging to these districts were previously measured during 2007. To track changes, a comparison between new (2014) and previous (2007) measurements of morphological characteristics was done. The current bees of El-Behera are slightly larger than those of 2007, emphasising no reduction in colonies productivity. There is evidence that environmental factors have not caused much stress on the colonies since 2007. The results of this study are useful in providing understanding of the current state of bees in Egypt, and the likely improvement of future beekeeping.

Crystallization management for high-performance perovskite solar cells by introducing an antisolvent into the perovskite precursor

2020 ◽  
Vol 8 (44) ◽  
pp. 15860-15867
Author(s):  
Chongyang Xu ◽  
Zhihai Liu ◽  
Eun-Cheol Lee
Keyword(s):  
Solar Cells ◽  
Diethyl Ether ◽  
High Performance ◽  
Perovskite Solar Cells ◽  
Crystal Formation ◽  
Entire Process ◽  
Perovskite Crystal

Mixing diethyl ether into perovskite precursor can tune the crystal formation through the entire process, yielding a quality-improved perovskite crystal.

FORMULASI PATCH KOSMETIK LENDIR BEKICOT (Achatina fulica) DENGAN POLIMER KITOSAN DAN BERBAGAI VARIASI AMILUM

2017 ◽  
Vol 2 (2) ◽  
pp. 233
Author(s):  
Michrun Nisa ◽  
Andi Nuraisyah ◽  
Nurul Arfiyanti Yusuf ◽  
Nurul Alifah K
Keyword(s):  
Moisture Content ◽  
Corn Starch ◽  
Potato Starch ◽  
Moisture Uptake ◽  
High Moisture ◽  
Tapioca Starch ◽  
Color Uniformity ◽  
Folding Endurance ◽  
Standard Parameter ◽  
Evaporation Technique

The research on cosmetic patch formulation containing snail slime with a variety starch was aimed to determine the type of starch that could produce a patch preparation with a good physical characteristic had been conducted. Cosmetic patch formulation of snail slime was using combination of chitosan and starch polymers such as corn, potato and tapioca starch. The method was used the solvent evaporation technique. The evaluation of patches include weight uniformity, folding endurance, thickness, moisture content, moisture uptake and stability of the patch. The combination of chitosan and starch polymers produced patches that had pH 5 with color uniformity, smoothness of surface and easily removed from the mold. The results showed that patches containing tapioca starch gave weight uniformity that did not much different on each replication that was 0,568 ± 0,03. Patches containing corn starch provided thickness values on each replication did not much different from 0,16± 0,01. Patches containing potato and tapioca starch produced patches that was accordance with the standard parameter of folding endurance was more than 200 times. Patches containing corn and tapioca starch producing patches accordance with the standard parameter of moisture content were less than 10 %. Patches containing potato starch gave patch a high moisture uptake that was 8,2%. The combination of chitosan and tapioca strach as polymers produced patch preparation with a good characteristic on the formulation of snail slime cosmetic patch.

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