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Alam MA, Uddin MT, Tasnim KT, Sarker SS, Razzaq MA, Kabir MA, Sujan SMA, Mondal AK. Comparative evaluation of physicochemical and antimicrobial properties of rubber seed oil from different regions of Bangladesh. Heliyon 2024; 10:e25544. [PMID: 38384561 PMCID: PMC10878869 DOI: 10.1016/j.heliyon.2024.e25544] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2023] [Revised: 01/16/2024] [Accepted: 01/29/2024] [Indexed: 02/23/2024] Open
Abstract
In Bangladesh, the annual production of rubber seeds is typically left untapped although the seeds contained a high percentage of oil but underutilized without any value-added utilization. This study aims to evaluate the geographical effect on physicochemical properties, fatty acid composition and the antimicrobial activity of oil extracted from rubber seeds. Seeds were collected from three different regions of Bangladesh and the oil was extracted by the soxhlet method using n-hexane as a solvent. Results demonstrated that the geographical regions have some significant effect on the properties of rubber seed oil (RSO). The physicochemical properties of RSO varied from region to region. For example, the percent of yield, higher heating value, and flash point varied from 50.0 to 50.8 %, 31.8-33.3 kJ/g, and 237-245 °C, respectively. The chemical parameters, such as acid value, iodine value, and hydroxyl value varied from 13.3 to 18.2 mg KOH/g, 132-137 g I2/100g, and 47.7-55.8 mg KOH/g, respectively. Chromatographic analysis showed that RSO mainly contains palmitic, linoleic, linolenic, and stearic acid. Regional variations were also seen in the composition of these fatty acids. Most notably, regardless of the rubber seeds collected from various locations, RSO exhibited inhibitory activity against only gram positive bacteria. The zone of inhibition range for different tested gram positive bacteria was 2.33-11.17 mm irrespective of different RSO samples.
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Affiliation(s)
- Md. Ashraful Alam
- Leather Research Institute, Bangladesh Council of Scientific and Industrial Research, Savar, Dhaka 1350, Bangladesh
| | - Md. Tushar Uddin
- Leather Research Institute, Bangladesh Council of Scientific and Industrial Research, Savar, Dhaka 1350, Bangladesh
| | - Khandokar Tahmina Tasnim
- Leather Research Institute, Bangladesh Council of Scientific and Industrial Research, Savar, Dhaka 1350, Bangladesh
| | - Shashanka Shekhar Sarker
- Leather Research Institute, Bangladesh Council of Scientific and Industrial Research, Savar, Dhaka 1350, Bangladesh
| | - Md. Abdur Razzaq
- Leather Research Institute, Bangladesh Council of Scientific and Industrial Research, Savar, Dhaka 1350, Bangladesh
| | - Md. Alamgir Kabir
- Institute of Food Science and Technology, Bangladesh Council of Scientific and Industrial Research, Dhaka 1205, Bangladesh
| | - SM Asaduzzaman Sujan
- Leather Research Institute, Bangladesh Council of Scientific and Industrial Research, Savar, Dhaka 1350, Bangladesh
- BCSIR Laboratories, Bangladesh Council of Scientific and Industrial Research, Dhaka 1205, Bangladesh
| | - Ajoy Kanti Mondal
- Institute of National Analytical Research and Service, Bangladesh Council of Scientific and Industrial Research, Dhaka 1205, Bangladesh
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Kwon YR, Moon SK, Kim HC, Kim JS, Kwon M, Kim DH. Effects of Grafting Degree on the Formation of Waterborne Polyurethane-Acrylate Film with Hard Core-Soft Shell Structure. Polymers (Basel) 2023; 15:3765. [PMID: 37765619 PMCID: PMC10538150 DOI: 10.3390/polym15183765] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2023] [Revised: 09/11/2023] [Accepted: 09/13/2023] [Indexed: 09/29/2023] Open
Abstract
Waterborne polyurethane-acrylate (WPUA) grafted with polyurethane was prepared to improve the film-forming ability of hard-type acrylic latex. To balance the film-formation ability and hardness, the WPUA latex was designed with a hard core (polyacrylate) and soft shell (polyurethane). The grafting ratio was controlled through varying the content of 2-hydroxyethyl methacrylate (HEMA) used to cap the ends of the polyurethane prepolymer. The morphologies of the latex particles, film surface, and fracture surface of the film were characterized through transmission electron microscopy, atomic force microscopy, and scanning electron microscopy, respectively. An increase in the grafting ratio resulted in the enhanced miscibility of polyurethane and polyacrylate but reduced adhesion between particles and increased minimum film formation temperature. In addition, grafting was essential to obtain transparent WPUA films. Excessive grafting induced defects such as micropores within the film, leading to the decreased hardness and adhesive strength of the film. The optimal HEMA content for the preparation of a WPUA coating with excellent film-forming ability and high hardness in ambient conditions was noted to be 50%. The final WPUA film was prepared without coalescence agents that generate volatile organic compounds.
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Affiliation(s)
- Yong Rok Kwon
- Materials & Component Convergence R&D Department, Korea Institute of Industrial Technology (KITECH), 143, Hanggaul-ro, Sangnok-gu, Ansan-si 15588, Republic of Korea; (Y.R.K.); (S.K.M.); (H.C.K.); (J.S.K.); (M.K.)
- Department of Material Chemical Engineering, Hanyang University, 55, Hanggaul-ro, Sangnok-gu, Ansan-si 15588, Republic of Korea
| | - Seok Kyu Moon
- Materials & Component Convergence R&D Department, Korea Institute of Industrial Technology (KITECH), 143, Hanggaul-ro, Sangnok-gu, Ansan-si 15588, Republic of Korea; (Y.R.K.); (S.K.M.); (H.C.K.); (J.S.K.); (M.K.)
- School of Integrative Engineering, Chung-Ang University, 84, Heukseok-ro, Dongjak-gu, Seoul 06974, Republic of Korea
| | - Hae Chan Kim
- Materials & Component Convergence R&D Department, Korea Institute of Industrial Technology (KITECH), 143, Hanggaul-ro, Sangnok-gu, Ansan-si 15588, Republic of Korea; (Y.R.K.); (S.K.M.); (H.C.K.); (J.S.K.); (M.K.)
- Department of Material Chemical Engineering, Hanyang University, 55, Hanggaul-ro, Sangnok-gu, Ansan-si 15588, Republic of Korea
| | - Jung Soo Kim
- Materials & Component Convergence R&D Department, Korea Institute of Industrial Technology (KITECH), 143, Hanggaul-ro, Sangnok-gu, Ansan-si 15588, Republic of Korea; (Y.R.K.); (S.K.M.); (H.C.K.); (J.S.K.); (M.K.)
| | - Miyeon Kwon
- Materials & Component Convergence R&D Department, Korea Institute of Industrial Technology (KITECH), 143, Hanggaul-ro, Sangnok-gu, Ansan-si 15588, Republic of Korea; (Y.R.K.); (S.K.M.); (H.C.K.); (J.S.K.); (M.K.)
| | - Dong Hyun Kim
- Materials & Component Convergence R&D Department, Korea Institute of Industrial Technology (KITECH), 143, Hanggaul-ro, Sangnok-gu, Ansan-si 15588, Republic of Korea; (Y.R.K.); (S.K.M.); (H.C.K.); (J.S.K.); (M.K.)
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Hadzich A, Flores S, Masucci AE, Gomez ED, Groß GA. NMR and GPC Analysis of Alkyd Resins: Influence of Synthesis Method, Vegetable Oil and Polyol Content. Polymers (Basel) 2023; 15:polym15091993. [PMID: 37177141 PMCID: PMC10181308 DOI: 10.3390/polym15091993] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2023] [Revised: 03/28/2023] [Accepted: 03/29/2023] [Indexed: 05/15/2023] Open
Abstract
Alkyd resins are oil-based polymers that have been widely used for generations in the surface coating industry and beyond. Characterization of these resins is of high importance to understand the influence of its components on its behavior, compatibility with other resins, and final quality to ensure high durability. Here, NMR spectroscopy and GPC were used for characterizing differences in the chemical structure, molecular distribution, and dispersity between oil-based and fatty acid-based alkyd polymers made from sacha inchi and linseed oils. Sancha inchi (Plukentia volubilis L.) is a fruit-bearing plant native to South America and the Caribbean, and has a rich unsaturated fatty acid content. The effect of vegetable oil and polyol selection on the synthesis of alkyd resins for coating applications was analyzed. The influence of two different synthesis methods, monoglyceride and fatty acid processes, was also compared. Important structural differences were observed using NMR: one-dimensional spectra revealed the degree of unsaturated fatty acid chains along the polyester backbone, whereas, 2D NMR experiments facilitated chemical shift assignments of all signals. GPC analysis suggested that alkyd resins with homogeneous and high molecular weights can be obtained with the fatty acid process, and that resins containing pentaerythritol may have uniform chain lengths.
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Affiliation(s)
- Antonella Hadzich
- Instituto de Corrosión y Protección (ICP-PUCP), Pontificia Universidad Católica del Perú (PUCP), Avenida Universitaria 1801, Lima 32, Peru
| | - Santiago Flores
- Instituto de Corrosión y Protección (ICP-PUCP), Pontificia Universidad Católica del Perú (PUCP), Avenida Universitaria 1801, Lima 32, Peru
| | - Ashley E Masucci
- Department of Chemical Engineering, The Pennsylvania State University, University Park, PA 16802, USA
| | - Enrique D Gomez
- Department of Chemical Engineering, The Pennsylvania State University, University Park, PA 16802, USA
- Department of Materials Science and Engineering, Materials Research Institute, The Pennsylvania State University, University Park, PA 16802, USA
| | - G Alexander Groß
- Department of Physical Chemistry and Microreaction Technology, Institute of Chemistry and Biotechnolgy, Technische Universität Ilmenau, Prof.-Schmidt-Str. 26, 98693 Ilmenau, Germany
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Copper nanoparticles and their oxides: optical, anticancer and antibacterial properties. INTERNATIONAL NANO LETTERS 2022. [DOI: 10.1007/s40089-022-00380-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Ifijen IH, Maliki M. A comprehensive review on the synthesis and photothermal cancer therapy of titanium nitride nanostructures. INORG NANO-MET CHEM 2022. [DOI: 10.1080/24701556.2022.2068596] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Ikhazuagbe H. Ifijen
- Department of Research Operations, Rubber Research Institute of Nigeria, Benin, Nigeria
| | - Muniratu Maliki
- Department of Industrial Chemistry, Edo State University, Uzairue, Iyamho, Nigeria
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