AI Article Synopsis
- Researchers explored methods for extracting color compounds from date pits, comparing traditional and ultrasonic techniques.
- The ultrasonic extraction at 25 kHz yielded the highest levels of phenolic, flavonoid, and metallic contents, with a resulting polyphenolic concentration of 48 mg per 100 mL.
- Dyeing experiments showed that extracts from the ultrasonic method produced stronger colors and better fastness properties, likely due to increased metallic content acting as an effective bio-mordant.
Article Abstract
In this research, extraction of colouring matter from date pits powder was conferred by conventional and ultrasonic methods. Phenolic compounds present in the resulted extract were identified by HPLC analysis. Total phenolic, total flavonoid and total metallic contents were quantified; and the highest levels were obtained in case of ultrasonic extraction process at a frequency of 25 kHz. The different resultant extracts were diluted with distilled water and unified to a polyphenolic content of 48 mg per 100 mL. Dyeing results have been discussed as a function of the bio-metallic contents present in the extract. It was found that the highest colour strengths and the better fastness properties were registered in case of dyeing experiments developed using the ultrasonic extracts. Those above results could be due to the highest metallic content present in the ultrasonic extracts, which has functioned as a bio-mordant properly extracted from date pits powder.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1080/14786419.2017.1363751 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Improving water barrier properties of starch based bioplastics by lignocellulosic biomass addition: Synthesis, characterization and antibacterial properties.
Int J Biol Macromol
December 2024
University of Sciences and Technology Houari Boumediene, Laboratory of Polymer Materials, Faculty of Chemistry, PO Box 32, El Alia Bab Ezzouar, 16111 Algiers, Algeria.
Global population growth has led to an increase in the demand for polymers, along with concerns about environmental pollution caused by solid polymers (such as consumer plastics), as well as the threat of global warming resulting from the production of polymer feedstock. Therefore, the polymer industry must develop sustainable and innovative strategies. The present study focuses on testing the potential of corn starch (CS) to produce bioplastic films and the impact of olive pits powder (OPP) addition, a natural agricultural waste material mainly containing lignocellulose, as filler on their properties.
View Article and Find Full Text PDFDevelopment of Polymer Composites Using Surface-Modified Olive Pit Powder for Fused Granular Fabrication.
Polymers (Basel)
October 2024
Departamento Ciencia de los Materiales, Ingeniería Metalúrgica y Química Inorgánica, IMEYMAT, Facultad de Ciencias, Universidad de Cádiz, Campus Río San Pedro, s/n, 11510 Puerto Real, Spain.
In this study, olive pit agro-waste from the olive oil industry is valorized by incorporating it as an additive in a polyethylene terephthalate glycol (PETG) matrix to develop bio-based composite materials for large format additive manufacturing (LFAM). The olive pits were first ground into olive pit powder (OPP) and then functionalized by polymerizing poly(butylene adipate-co-terephthalate) PBAT on their surface, resulting in a hydrophobic, modified olive pit powder (MOPP) with enhanced compatibility with the PETG matrix. OPP and MOPP composites were compounded and 3D-printed via Fused Granular Fabrication (FGF) using 5, 10, and 15 wt.
View Article and Find Full Text PDFEffect of Temperature on Passive Film Characteristics of LPBF (Laser Powder-Bed Fusion) Processing on UNS-S31603.
Materials (Basel)
July 2024
National Corrosion and Materials Reliability Laboratory, Department of Materials Science and Engineering, Texas A&M University, 1041 Rellis Pkwy, Bryan, TX 77807, USA.
The effect of temperature on the localized corrosion resistance and passive film characteristics of laser powder-bed fusion (LPBF) 316L (UNS S31603) was studied in a buffered 3.5 wt% NaCl solution at 25, 50, and 75 °C. DC techniques such as cyclic potentiodynamic polarization showed lower passive current densities, high breakdown potentials, and a higher resistance to initial breakdown compared with wrought 316L samples at all temperatures.
View Article and Find Full Text PDFEffect of laser and coating surface treatment on the bond strength of zirconia ceramics.
Hua Xi Kou Qiang Yi Xue Za Zhi
June 2024
Dept. of Stomatology, Beijing Hospital of Integrated Traditional Chinese and Western Medicine, Beijing 100039, China.
Objectives: This study aims to investigate bond strength between zirconia and resin cement through surface treatments with Er: YAG laser, Nd: YAG laser, and Si-Zr coating.
Methods: Seventy-five round pre-sintered zirconia discs with a diameter of 18 mm and a thickness of 1.5 mm were prepared by a powder compactor.
Corrosion Resistance of Fe-Based Amorphous Films Prepared by the Radio Frequency Magnetron Sputter Method.
Materials (Basel)
April 2024
Department of Optoelectronics and Materials Technology, National Taiwan Ocean University, Keelung 20224, Taiwan.
Amorphous thin films can be applied to increase the anti-corrosion ability of critical components. Atomized FeCrNiMoCSiB powders were hot-pressed into a disc target for R. F.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!