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Journal articles on the topic 'Modified castor oil'

Author: Grafiati

Published: 7 June 2025

Last updated: 2 August 2025

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1

Qian, Shanhua, Hongyue Wang, Chuanhui Huang, and Yongwu Zhao. "Experimental investigation on the tribological properties of modified carbon nanotubes as the additive in castor oil." Industrial Lubrication and Tribology 70, no. 3 (2018): 499–505. http://dx.doi.org/10.1108/ilt-05-2017-0138.

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Purpose This paper aims to modify carbon nanotubes with oleic acid, and to study the tribological properties of castor oil with modified carbon nanotubes additives. The proper additives are sought for the future engineering application of castor oil. Design/methodology/approach Tribological properties of the castor oils mixed with the modified carbon nanotubes of four mass percentages were investigated using a four-ball testing rig. Coefficient of friction and wear scar diameter were obtained in each test, and the mechanism of modified carbon nanotubes and castor oil was discussed. Findings Th

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2

Patel, B. P., H. S. Patel, and S. R. Patel. "Modified Castor Oil as an Epoxy Resin Curing Agent." E-Journal of Chemistry 1, no. 1 (2004): 11–16. http://dx.doi.org/10.1155/2004/412906.

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A castor oil, an agricultural product, is an unsaturated material. Hence the castor oil is brominated by bromine liquid. The brominated castor oil (BCO) was then reacted with excess of aliphatic diaminesviz; ethylene diamine, 1,3-propane diamine and 1,6-hexane diamine. The resultant amino functionalized castor oil (ACO) samples were then characterized by elemental analysis, IR spectral study and number of amino groups. All the three ACO samples were then employed for the curing of commercial Brominated epoxy resin. The curing of epoxy resin by ACO was monitored on differential scanning calorim

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3

Chen, Shuang Lian, Guang Xue Chen, and Jiang Wen Liu. "Study on an Aliphatic Polyurethane Laminating Adhesive Based on Castor Oil." Applied Mechanics and Materials 262 (December 2012): 551–56. http://dx.doi.org/10.4028/www.scientific.net/amm.262.551.

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The first component of the Polyurethane adhesive was prepared with polyester polyol, polyether polyol ,castor oil and isophorone diisocyanate. And this component was mixed with the castor oil and its modified production to prepare a two-component solvent-free aliphatic polyurethane laminating adhesive. In this study, the influences of the copolymerization ratio of polyester/ether on viscosity, heat resistance, adhesion strength and boiling resistance were studied, as well as influences of castor oil and its modified production on curing speed and adhesion strength. The results showed that when

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4

Choe, Yong-A., Su-Il Kim, Jong-Hwan Jang, and Kyong-Sik Ju. "Synthesis and characteristics of water-based, rosin-modified, polymerized oil based on dehydrated castor oil acid and zinc resinate." RSC Advances 15, no. 3 (2025): 1690–97. https://doi.org/10.1039/d4ra03350g.

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In this study, we synthesized a water-based, rosin-modified, polymerized oil (WRPO) via an addition and polymerization reaction of dehydrated castor oil (DCO), rosin acid (RA), zinc resinate (ZR) and dehydrated castor oil acid (DCOA).

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Liu, Yan Yan, Jian Wen Tian, and Wen Long Zhang. "High-Efficiency Modified Alkyd Resin Application Research." Advanced Materials Research 284-286 (July 2011): 2077–81. http://dx.doi.org/10.4028/www.scientific.net/amr.284-286.2077.

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Alkyd resin dispersions are used in the paint industry as the basis for the new generation of environmentally friendly gloss paints. This research based on two-component seed oil soybean oil and castor oil to synthesis high-efficiency modified alkyd resin. The experimental conditions are the mass ratio of soybean oil with castor oil is 2:1, 55% degree of oil, Ni(OH)2 as the catalyst and 210°C~220°C for alcohol solution reaction, 220°C for esterification under the protection of nitrogen. The experimental results show that the product non-drying days are more than 30 days, acid value is 6.6, the

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6

Tai, Ching-Lung, Po-Liang Lai, Wei-De Lin, et al. "Modification of Mechanical Properties, Polymerization Temperature, and Handling Time of Polymethylmethacrylate Cement for Enhancing Applicability in Vertebroplasty." BioMed Research International 2016 (2016): 1–8. http://dx.doi.org/10.1155/2016/7901562.

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Polymethylmethacrylate (PMMA) bone cement is a popular bone void filler for vertebroplasty. However, the use of PMMA has some drawbacks, including the material’s excessive stiffness, exothermic polymerization, and short handling time. This study aimed to create an ideal modified bone cement to solve the above-mentioned problems. Modified bone cements were prepared by combining PMMA with three different volume fractions of castor oil (5%, 10%, and 15%). The peak polymerization temperatures, times to achieve the peak polymerization temperature, porosities, densities, modulus and maximum compress

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7

Qin, Yan, Jin Rong Jia, and Zhi Xiong Huang. "The Effect of Content of Castor Oil on Two-Component Castor Oil Based Polyurethane Adhesive." Advanced Materials Research 311-313 (August 2011): 1128–31. http://dx.doi.org/10.4028/www.scientific.net/amr.311-313.1128.

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A new two-component polyurethane adhesive was prepared with castor oil used as main agent and castor oil modified TDI used as curing agent.The effect of castor oil on the mechanical properties, adhesion properties and thermal stability of this adhesive were studied.This paper show us that TDI could be used as curing agent after modification. When the NCO/OH in curing agent and main agent:curing agent were 1.6 and 3:5 respectively, high performance adhesive was obtained.

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8

Salim, Razan Ali, Ibrahim Yaagoub Erwa, Asmo Abdillahi Hassan, et al. "Synthesis and Characterization of Li -Zeolite Catalyst for Biodiesel Production from Castor Oil." Oriental Journal Of Chemistry 40, no. 5 (2024): 1281–89. http://dx.doi.org/10.13005/ojc/400509.

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This study used lithium-modified Zeolite as a heterogeneous catalyst to make biodiesel from non-edible castor oil. The catalyst was wet impregnated with natural Zeolite and characterized by XRD, FTIR, and SEM. Castor oil was extracted and injected into a GC-MS unit for analysis, and established procedures were used to evaluate chemical properties. The catalyst's performance in the transesterification reaction was examined to determine optimal process conditions and reusability. A catalyst characterization study found that the lithium-modified zeolite catalyst selectively produces methyl esters

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9

Arévalo-Alquichire, Said, Claudia Ramírez, Laura Andrade, et al. "Polyurethanes from modified castor oil and chitosan." Journal of Elastomers & Plastics 50, no. 5 (2017): 419–34. http://dx.doi.org/10.1177/0095244317729578.

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Polyurethanes (PUs) from castor oil (CO), modified CO (MCO) by transesterification reaction, isophorone diisocyanate (IPDI) in an NCO/OH ratio equal to 1, and chitosan (CS) were synthesized to assess their potential as biomaterials. PUs were characterized by Fourier transform infrared spectroscopy, hydroxyl value (ASTM D1957), thermogravimetric analysis, Shore A hardness (ASTM D2240), and scanning electronic microscopy (SEM). Also, contact angle, water retention and in vitro degradation in PBS, and cell viability on fibroblast were performed. The hydroxyl value confirms CO modification, and IR

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10

Perera, Helanka J., Anjali Goyal, Saeed M. Alhassan, and Hussain Banu. "Biobased Castor Oil-Based Polyurethane Foams Grafted with Octadecylsilane-Modified Diatomite for Use as Eco-Friendly and Low-Cost Sorbents for Crude Oil Clean-Up Applications." Polymers 14, no. 23 (2022): 5310. http://dx.doi.org/10.3390/polym14235310.

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Herein we report the synthesis and characterization of novel castor oil-based polyurethane (PU) foam functionalized with octadecyltrichlorosilane (C18)-modified diatomaceous earth (DE) particles, exhibiting superior hydrophobicity and oil adsorption, and poor water absorption, for use in effective clean-up of crude oil spillage in water bodies. High-performance and low-cost sorbents have a tremendous attraction in oil spill clean-up applications. Recent studies have focused on the use of castor oil as a significant polyol that can be used as a biodegradable and eco-friendly raw material for th

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11

Morales-Gonzalez, Maria Paula, Kelly Navas-Gómez, Barrera Luis Eduardo Díaz, Jose Antonio Gomez-Tejedor, and Manuel Fernando Valero. "Incorporation of Chitosan in Polyurethanes Based on Modified Castor Oil for Cardiovascular Applications." Polymers 15, no. 18 (2023): 3733. https://doi.org/10.3390/polym15183733.

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The increased demand for vascular grafts for the treatment of cardiovascular diseases has led to the search for novel biomaterials that can achieve the properties of the tissue. According to this, the investigation of polyurethanes has been a promising approach to overcome the present limitations. However, some biological properties remain to be overcome, such as thrombogenicity and hemocompatibility, among others. This paper aims to synthesize polyurethanes based on castor oil and castor oil transesterified with triethanolamine (TEA) and pentaerythritol (PE) and with the incorporation of 1% c

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12

Morales-González, Maria, Kelly Navas-Gómez, Luis E. Diaz, José A. Gómez-Tejedor, and Manuel F. Valero. "Incorporation of Chitosan in Polyurethanes Based on Modified Castor Oil for Cardiovascular Applications." Polymers 15, no. 18 (2023): 3733. http://dx.doi.org/10.3390/polym15183733.

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The increased demand for vascular grafts for the treatment of cardiovascular diseases has led to the search for novel biomaterials that can achieve the properties of the tissue. According to this, the investigation of polyurethanes has been a promising approach to overcome the present limitations. However, some biological properties remain to be overcome, such as thrombogenicity and hemocompatibility, among others. This paper aims to synthesize polyurethanes based on castor oil and castor oil transesterified with triethanolamine (TEA) and pentaerythritol (PE) and with the incorporation of 1% c

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13

Yu, Qianhui, Zengshuai Zhang, Pengyun Tan, et al. "Siloxane-Modified UV-Curable Castor-Oil-Based Waterborne Polyurethane Superhydrophobic Coatings." Polymers 15, no. 23 (2023): 4588. http://dx.doi.org/10.3390/polym15234588.

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In recent years, superhydrophobic coatings with self-cleaning abilities have attracted considerable attention. In this study, we introduced hydroxyl-terminated polydimethylsiloxane (OH−PDMS) into castor-oil-based waterborne polyurethanes and synthesized silicone-modified castor-oil-based UV-curable waterborne polyurethanes (SCWPU). Further, we identified the optimal amount of OH−PDMS to be added and introduced different amounts of micro- and nanoscale heptadecafluorodecyltrimethoxysilane-modified SiO2 particles (FAS−SiO2) to prepare rough-surface SCWPU coatings with dense micro- and nanostruct

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14

PIAMPHONGSANT, THADA. "Phenol-Castor Oil: Modified Peel for Dermal Melasma." Dermatologic Surgery 32, no. 5 (2006): 611–17. http://dx.doi.org/10.1111/j.1524-4725.2006.32131.x.

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15

Yao, Lyu, Azizah Baharum, Lih Jiun Yu, Zibo Yan, and Khairiah Haji Badri. "A Vegetable-Oil-Based Polyurethane Coating for Controlled Nutrient Release: A Review." Coatings 15, no. 6 (2025): 665. https://doi.org/10.3390/coatings15060665.

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Bio-based polyurethane (PU) is synthesized either via the prepolymerization or addition polymerization of bio-based polyols and isocyanates. PU synthesized from vegetable-oil-based polyols has excellent properties for various application needs. Bio-based PU coatings from renewable vegetable oil show good degradability in soil while controlling the nutrient release process. Castor oil, soybean oil, palm oil, olive oil, linseed oil, rapeseed oil, cottonseed oil, and recycled oil have been explored in the study of bio-based PU coatings for controlled nutrient release. Castor oil as a natural poly

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16

Sharma, Vikas, Abul Kalam Hossain, Ganesh Duraisamy, and Murugan Vijay. "Transesterification of Pyrolysed Castor Seed Oil in the Presence of CaCu(OCH3)2 Catalyst." Energies 14, no. 19 (2021): 6064. http://dx.doi.org/10.3390/en14196064.

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Energy consumption is on the rise due to rapid technological progress and a higher standard of living. The use of alternative energy resources is essential to meet the rising energy demand and mitigate the carbon emissions caused due to use of fossil-based fuels. Biodiesel produced from non-edible oils such as castor seed oil (CO) can be used in diesel engines to replace fossil diesel. However, the quality and yields for CO biodiesel is low due to the presence of ricinolic acid C18:1OH (79%). In this study, two-stage conversion techniques were used to improve the yields and properties of CO bi

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17

Rong, Min Zhi, Ming Qiu Zhang, Su Ping Wu, Hong Juan Wang, and Tibor Czigány. "Ecomaterials-Foam Plastics Synthesized from Plant Oil-Based Resins." Materials Science Forum 539-543 (March 2007): 2311–16. http://dx.doi.org/10.4028/www.scientific.net/msf.539-543.2311.

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In this work, plastic foams were prepared from plant oil resins based on soybean oil and castor oil. Firstly, epoxidized soybean oil (ESO) reacted with acrylic acid using N, N-dimethyl benzyl amine as the catalyst, and castor oil was modified with maleic anhydride, respectively. Acid number was used to monitor the reaction process, and structures of the resultant acrylated epoxidized soybean oil (AESO) and maleate castor oil (MACO) were proved by Fourier Transform Infrared (FTIR) measurements. It was found that the catalyst is quite effective in synthesizing AESO. Then, plastic foams based on

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18

López, Alejandro, Andreas Hoess, Thomas Thersleff, Marjam Ott, Håkan Engqvist, and Cecilia Persson. "Low-modulus PMMA bone cement modified with castor oil." Bio-Medical Materials and Engineering 21, no. 5-6 (2011): 323–32. http://dx.doi.org/10.3233/bme-2012-0679.

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19

Valero, Manuel F. "Polyurethane–Polystyrene Simultaneous Interpenetrating Networks from Modified Castor Oil." Journal of Elastomers & Plastics 42, no. 3 (2010): 255–65. http://dx.doi.org/10.1177/0095244310368122.

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20

Xia, Lei, Hai-yan Zhang, Dong-wei Cao, and Yan-sheng Guo. "Properties of Polyurethane-modified Asphalt Based on Castor Oil." Journal of Highway and Transportation Research and Development (English Edition) 11, no. 4 (2017): 15–21. http://dx.doi.org/10.1061/jhtrcq.0000591.

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21

Karak, Niranjan, Sravendra Rana, and Jae Whan Cho. "Synthesis and characterization of castor-oil-modified hyperbranched polyurethanes." Journal of Applied Polymer Science 112, no. 2 (2009): 736–43. http://dx.doi.org/10.1002/app.29468.

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22

Wu, Chao, Xiu Ling Zhang, and Xiao Ming Jia. "Study on Green Design and Biodegradability of B-Containing Water-Based Cutting Fluid." Key Engineering Materials 407-408 (February 2009): 309–12. http://dx.doi.org/10.4028/www.scientific.net/kem.407-408.309.

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Cutting fluid occupies an important position in the metal processing. The performance and pollution problem brought to the environment of cutting fluid are paid attention to day by day. Proceed from the perspective of green design, using castor oil which has a good biodegradability, triethanolamine, boric acid and the sodium polyacrylate whose molecular weight is less than 2×104 as the main raw materials, a boron-containing water-based cutting fluid had been obtained. The performance of B-containing water-based cutting fluid are measured according to GB/T6144-1985 regulation which is the techn

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23

Fu, Biao, Lin Xiao, Long Jiang Yu, and Guang Yang. "Preparation of Lactic Acid Based Polyurethanes Modified by Castor Oil." Advanced Materials Research 47-50 (June 2008): 1458–61. http://dx.doi.org/10.4028/www.scientific.net/amr.47-50.1458.

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A series of biodegradable lactic acid based Polyurethanes modified by castor oil (PLBA-PUs) have been successfully prepared by using a two steps method as follow: Firstly prepolymers with hydroxyl terminated are synthesized by copolymerization of L-lactic acid and 1, 4-butandiol (BD), and then react with castor oil (C.O.) and hexamethylene diisocynate (HDI). The effects of BD/LA monomer ration and C.O./prepolymers mole ratio on the molecular weight and mechanical properties of PLBA-PUs are investigated. The polymers obtained are characterized by gel permeation chromatography, fourier transform

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Yan, Xiuhua, Jianfei Ding, Wenyan Shi, Lanqin Tang, Yidong Zhang, and Wei Xu. "Synthesis of Castor Oil-Based Quaternary Ammonium Salt and Modification of Attapulgite for Treating Industrial Wastewaters." Materials 16, no. 9 (2023): 3468. http://dx.doi.org/10.3390/ma16093468.

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In order to develop multifunctional quaternary ammonium salts and explore their advantages as modifiers for wastewater treatment, castor oil-based quaternary ammonium salts were synthesised and subsequently used as modifiers for attapulgite treatment. The structures of untreated and treated attapulgite were compared by Fourier transform infrared spectra and X-ray diffraction. The mechanism of modification was speculated. Various factors such as the amount of modified attapulgite, temperature and pH were also investigated in the batch experiments on the removal rates of acetone and phenol from

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25

Ji, Xuan, Yanming Zhou, Baoling Zhang, Caiying Hou, and Guozhang Ma. "Polydimethylsiloxane and Castor Oil Comodified Waterborne Polyurethane." ISRN Polymer Science 2013 (December 17, 2013): 1–10. http://dx.doi.org/10.1155/2013/284683.

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In view of both improving properties of waterborne polyurethane (WPU) and sufficient utilization of renewable resources, a series of polydimethylsiloxane (PDMS) and castor oil (C.O.) comodified anionic WPUs with internal cross-linking was prepared through a prepolymer mixing process. The chemical structure of synthesized polymers was characterized by Fourier transforms infrared spectroscopy (FT-IR). In comparison with traditional linear WPU synthesized from petroleum-based polyols, these novel WPU films exhibited superior properties in solvent and water resistance, thermal stability, and mecha

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26

Bao, Li-Hong, Li-Hong Bao, and Hai-Teng Ma. "Preparation of Temperature-Sensitive Polyurethanes Based on Modified Castor Oil." Fibres and Textiles in Eastern Europe 25 (June 30, 2017): 34–39. http://dx.doi.org/10.5604/01.3001.0010.1686.

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A series of temperature-sensitive polyurethanes (TSPUs) with polytetrahydrofuran glycol (PTMG), poly(ethylene glycol) (PEG) and maleic anhydride modified castor oil (MCO) as soft segments were prepared in this paper. The morphology of the temperature-sensitive polyurethane films was characterised by SEM, DSC and WAXD. SEM studies were also carried out to investigate the surface structure of coated and uncoated fabrics. The water vapour permeability of the coated and uncoated fabrics were measured as well. The results showed that a nonporous TSPU layer was formed on the coated fabric surface. T

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Ahuja, Dheeraj, and Anupama Kaushik. "Castor oil-based polyurethane nanocomposites reinforced with organically modified clay." Journal of Elastomers & Plastics 49, no. 4 (2016): 315–31. http://dx.doi.org/10.1177/0095244316653263.

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Polyurethane(PU) nanocomposites were prepared using high shear mixing from castor oil, 4,4′-diphenylmethane diisocyanate, and modified clay (Closite 30B) as filler. The synthesis was carried out in bulk and without catalyst in the presence of clay. The clay percentage was varied from 1% to 5% by weight of the nanocomposite. The prepared nanocomposites were characterized using transmission electron microscopy (TEM), scanning electron microscopy, wide angle X-ray diffraction (WAXD), Fourier transform infrared (FTIR) spectroscopy, mechanical and water absorption properties. TEM and WAXD results c

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28

Jaisankar, S. N., Y. Lakshminarayana, Ganga Radhakrishnan, and T. Ramasami. "Modified Castor Oil Based Polyurethane Elastomers for One-Shot Process." Polymer-Plastics Technology and Engineering 35, no. 5 (1996): 781–89. http://dx.doi.org/10.1080/03602559608004060.

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29

Bhagawati, Deepshikha, Suman Thakur, and Niranjan Karak. "Castor oil based hyperbranched polyester/bitumen modified fly ash nanocomposite." Advances in nano research 4, no. 1 (2016): 15–29. http://dx.doi.org/10.12989/anr.2016.4.1.015.

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30

Mohanty, D., MK Kanny, S. Mohanty, and SK Nayak. "Bio-based polyurethane coating synthesized from modified castor oil - applicable in base coat of automobile paint." Suid-Afrikaanse Tydskrif vir Natuurwetenskap en Tegnologie 40, no. 1 (2022): 121–25. http://dx.doi.org/10.36303/satnt.2021cosaami.24.

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The current study reports the epoxidation of castor oil (CO) by using hydrogen peroxide as catalyst and formic acid as oxidizing agent. Subsequently bio based polyurethane based base coat was synthesized by using epoxidised castor oil (ECO) as polyol, Isophorone diisocyanate (IPDI) as curing agent and dibutylin dilaurate (DBTDL) as catalyst. The paint formulation with OH:NCO ratio 1:1.2 was optimized. An independent study was carried out employing the mechanical test like cross-cut tape test was carried out to evaluate th paint properties. Morphological and structural studies like FTIR, SEM, H

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31

Miao, Shi Da, You Yan Liu, Ping Wang, and Song Ping Zhang. "Castor Oil and Microcrystalline Cellulose Based Polymer Composites with High Tensile Strength." Advanced Materials Research 399-401 (November 2011): 1531–35. http://dx.doi.org/10.4028/www.scientific.net/amr.399-401.1531.

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Castor oil and microcrystalline cellulose were employed as biomass feedstock to produce bio-based polymer composites with increased tensile strength. The polymer composites were prepared by curing castor oil with 4,4'-methylenebis (phenyl isocyanate) (MDI) in the presence of microcrystalline cellulose (MC) or modified MC (MMC). The MMC was prepared by reacting MDI with MC to introduce isocyanate groups to the surface of MC. X-ray diffraction spectra suggested the good retention of the crystalline structure of MC or MMC in the composites. SEM analysis showed the well dispersion of MC or MMC in

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32

Shang, Qianqian, Jianwen Cheng, Lihong Hu, et al. "Bio-inspired castor oil modified cellulose aerogels for oil recovery and emulsion separation." Colloids and Surfaces A: Physicochemical and Engineering Aspects 636 (March 2022): 128043. http://dx.doi.org/10.1016/j.colsurfa.2021.128043.

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Rajwani, S., and P. K. S. Yadav. "Synthesis of Biolubricant via Chemical Modification from Vegetable Oil Blend using Heterogeneous Catalyst." Asian Journal of Chemistry 33, no. 9 (2021): 2021–26. http://dx.doi.org/10.14233/ajchem.2021.23263.

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Present study reports the synthesis of biolubricant synthesis from the vegetable oil blend [dehydrated castor oil (DCO) and waste ricebran oil (WRBO)] using heterogeneous catalyst and its physico-chemical properties. The biolubricant was synthesized from blend of vegetable oils using two chemical modification processes i.e. synthesizing methyl esters of blend oil using sodium methoxide as catalyst and then epoxidation of synthesized methyl esters using Amberlite IR-120 strongly acidic ion-exchange resin. The biolubricant sample was examined by 1H & 13C NMR and FT-IR analysis. Viscosity ind

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Arévalo, Fabián R., Sonia A. Osorio, Nathaly A. Valcárcel, Jeimmy C. Ibarra, and Manuel F. Valero. "Characterization and in vitro Biocompatibility of Binary Mixtures of Chitosan and Polyurethanes Synthesized from Chemically Modified Castor Oil, as Materials for Medical Use." Polymers from Renewable Resources 9, no. 1 (2018): 23–38. http://dx.doi.org/10.1177/204124791800900102.

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This study aimed to evaluate the effect of the incorporation of chitosan into polyurethane matrices synthesized from chemically modified castor (Ricinus communis) oil by transesterification with pentaerythritol. An additional aim of this study was to determine the degree of acceptance as a biomaterial (obtained from renewable sources), based on the analysis of its mechanical properties (stress/rupture strain), hydrophilic character (contact angle), morphology (SEM) and in vitro compatibility of polyurethanes when in contact with mouse fibroblast L929 cells. No significant changes in mechanical

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Jovicic, Mirjana, and Radmila Radicevic. "Curing kinetics of alkyd/melamine resin mixtures." Chemical Industry 63, no. 6 (2009): 629–35. http://dx.doi.org/10.2298/hemind0906629j.

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Alkyd resins are the most popular and useful synthetic resins applied as the binder in protective coatings. Frequently they are not used alone but are modified with other synthetic resins in the manufacture of the coatings. An alkyd/melamine resin mixture is the usual composition for the preparation of coating called 'baking enamel' and it is cured through functional groups of resins at high temperatures. In this paper, curing kinetics of alkyd resins based on castor oil and dehydrated castor oil with melamine resin, has been studied by DSC method with programmed heating and in isothermal mode

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36

KOZDRACH, Rafał. "THE TRIBOLOGICAL PROPERTIES OF LUBRICATING GREASES BASED ON RENEWABLE OILS." Tribologia 266, no. 2 (2016): 61–72. http://dx.doi.org/10.5604/01.3001.0010.7565.

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The paper discusses the influence of vegetable oil basis on lubricating properties of their selected compositions. Four vegetable oils were used for production of lubricating greases: rapeseed, sunflower, soybean, and castor, all thickened with modified silica of Aerosil® type. The tribological properties of lubricating greases based on vegetable oils were investigated. On their basis, the most beneficial compositions were selected. The tribological properties of greases were estimated via measurements of limiting load of wear (Goz/40), welding load (Pz), scuffing load (Pt), limiting load of s

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Reyes Herdenn GAMPOULA, Roniche NGUIE, Michel ELENGA, Haïshat Lucadeïde MAHOUMI SOULEYMANE, Sylvia Pétronille NTSOSSANI, and Dieuvey Johnmarline MATADIA DE MABIRI. "Influence of two drying methods (oven and solar dryer) in modeling the drying kinetics of Ricinus communis L. capsules." World Journal of Advanced Research and Reviews 25, no. 1 (2025): 1443–52. https://doi.org/10.30574/wjarr.2025.25.1.0175.

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Castor beans are herbaceous perennials found in tropical and subtropical climates. They are very cold-hardy and belong to the Euphorbiaceae family. The aim of this work was to study the drying kinetics of castor oil capsules and the variations in thermal quantities that can occur during drying. Two drying methods were used: conduction drying in an oven at temperatures ranging from 50 °C, 60 °C and 70 °C, and radiation drying in a boat-type direct solar dryer at an average temperature of 49 °C. The results showed that the mass loss of castor oil capsules varied as a function of time and applied

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Mgaya, James. "Trypsin Immobilization on Thiol Functionalized Mesoporous Silicas Prepared Using Castor Oil Template." Tanzania Journal of Science 46, no. 3 (2020): 755–67. http://dx.doi.org/10.4314/tjs.v46i3.16.

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Mesoporous thiol modified silicas have been prepared using castor oil as a templating agent. The preparation was done through a co-condensation of 3-mercaptopropyltriethoxysilane and tetraethylorthosilicate in a 1:4 molar ratio. Physisorption studies showed that the prepared mesoporous silicas have an average pore diameter of 9 nm, pore volume of 1.0336 cm3/g and surface areas of up to 605 m2/g. FTIR confirmed the attachment of thiol groups on the surface of the prepared mesoporous silica as evidenced with an absorption band at around 2600 cm. SEM images indicated agglomeration of the prepared

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Ibrahim, Aminu O., Ademoh N. Ali, Lawal S. Albert, et al. "DEVELOPMENT OF BIODEGRADABLE LUBRICATING OIL FOR TURBINE BEARING FROM PALM KERNEL AND CASTOR OILS." FUDMA JOURNAL OF SCIENCES 9, no. 4 (2025): 145–54. https://doi.org/10.33003/fjs-2025-0904-3318.

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The search for sustainable and environmentally friendly alternatives to conventional mineral-based oil lubricants has led to increasing research into bio-based lubricants for industrial applications. This study develops biodegradable lubricating oil for turbine bearing from palm kernel and castor oils through chemical modification and additive blending. Using transesterification method, the oils were converted to their various methyl esters and blended with additives such as ethylene glycol, ascorbic acid, trimethylopropane, and graphene. Physiochemical evaluations of both palm kernel and cast

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Kaur, Raminder, and Mukesh Kumar. "Function of silicon oil in the castor oil based rigid polyurethane foams." Journal of Polymer Engineering 33, no. 9 (2013): 875–80. http://dx.doi.org/10.1515/polyeng-2013-0083.

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Abstract Rigid polyurethane foams are one of the most important cellular plastics. Castor oil was modified with glycerol to form the polyol and reacted with methyl diisocyanate and different proportions of silicon oil to achieve rigid polyurethane foam. Prepared foam was tested for its density and mechanical properties. It was found that compressive and flexural strength was improved with silicon oil content. The morphology of the resulted foams was also studied using scanning electron microscope, and it was observed that the cell size was reduced with silicon oil content, indicating a more de

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Choi, Soon-Mo, Sunhee Lee, and Eun-Joo Shin. "Synthesis and Characterization of Biopolyol-Based Waterborne Polyurethane Modified through Complexation with Chitosan." Nanomaterials 12, no. 7 (2022): 1143. http://dx.doi.org/10.3390/nano12071143.

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In this study, a series of castor oil-based anionic waterborne polyurethane (CWPU) systems, which it has been suggested may be suitable for use as green elastomers with diverse applications in films and coatings, was prepared by modified with O-carboxymethyl chitosan (CS) as not only a reinforcing filler, but a chain-extender of polyurethane prepolymer to enhance the properties of polyurethanes. Moreover, not only was the system obtained with castor oil-based polyol in the absence of a catalyst, but it was maintained with low viscosity by using acetone instead of toxic methyl ethyl ketone (MEK

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Kim, Kyungnam, and Tri Ho Minh Le. "Feasibility and Sustainable Performance of RAP Mixtures with Low-Viscosity Binder and Castor Wax–Corn Oil Rejuvenators." Buildings 13, no. 7 (2023): 1578. http://dx.doi.org/10.3390/buildings13071578.

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The utilization of Recycled Asphalt Pavement (RAP) mixtures in pavement construction is an environmentally friendly approach that promotes sustainable development by reducing energy consumption and material waste. However, the high cost of conventional rejuvenators limits the widespread use of RAP mixtures. In this study, a novel approach is proposed to enhance the performance of RAP mixtures by incorporating a combination of high-penetration asphalt binder and rejuvenators, namely Castor wax and Corn oil. The newly developed rejuvenator consists of 8.5% Castor wax oil, 3% Corn oil, 3% fatty a

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Wen, Yue, Pingping Jiang, Jie Huang, Agus Haryono, Jianneng Deng, and Zhiliang Cao. "Preparation and Characterization of Polyhedral Octaphenylsilsesquioxane Modified Castor oil based Polyurethane." Jurnal Kimia Terapan Indonesia 20, no. 1 (2018): 16–25. http://dx.doi.org/10.14203/jkti.v20i1.375.

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Vegetable oil-based polyurethanes were synthesized using castor oil (CO) as feedstock, which were characterized by their environmental friendly and renewable properties. Aiming to compensate for shortcomings of these materials, a series of polyurethane/polyhedral octaphenylsilsesquioxane (OPS) hybrids with different OPS contents were prepared by physical mixing in the solutions. Thereafter?chemical structure?morphology and thermal properties of hybrids were characterized through Fourier transform infrared spectrometer (FTIR), scanning electron microscope (SEM), differential scanning calorimetr

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Athawale, Vilas, and Suresh Kolekar. "INTERPENETRATING POLYMER NETWORKS BASED ON OIL MODIFIED CASTOR OIL URETHANE AND POLY(METHYL METHACRYLATE)." Journal of Macromolecular Science, Part A 37, no. 1-2 (2000): 65–79. http://dx.doi.org/10.1081/ma-100101081.

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Tavares, L. B., C. V. Boas, G. R. Schleder, A. M. Nacas, D. S. Rosa, and D. J. Santos. "Bio-based polyurethane prepared from Kraft lignin and modified castor oil." Express Polymer Letters 10, no. 11 (2016): 927–40. http://dx.doi.org/10.3144/expresspolymlett.2016.86.

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Valero, Manuel F., and Adriana Gonzalez. "Polyurethane adhesive system from castor oil modified by a transesterification reaction." Journal of Elastomers & Plastics 44, no. 5 (2012): 433–42. http://dx.doi.org/10.1177/0095244312437155.

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Wasekar, Parag A., and Shashank T. Mhaske. "Dielectric Coating of Castor-Oil-Based Polyurethane Modified with Leucoemeralidine Polyaniline." International Journal of Polymeric Materials 62, no. 4 (2013): 231–35. http://dx.doi.org/10.1080/00914037.2011.641695.

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Sudha, G. S., Hemjyoti Kalita, Smita Mohanty, and Sanjay Kumar Nayak. "Castor oil modified by epoxidation, transesterification, and acrylation processes: Spectroscopic characteristics." International Journal of Polymer Analysis and Characterization 22, no. 6 (2017): 519–25. http://dx.doi.org/10.1080/1023666x.2017.1334171.

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Lim, Won-Bin, Jin-Gyu Min, Min-Ji Seo, Ju-Hong Lee, Ji-Hong Bae, and PilHo Huh. "Synthesis and properties of biodegradable waterborne polyurethane modified as castor oil." Results in Materials 19 (September 2023): 100433. http://dx.doi.org/10.1016/j.rinma.2023.100433.

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EL AHMAR, Radjaa, Charef HARRATS, Djillali BASSOU, and Soufi KACIMI. "Heterogeneous transesterification of castor oil for biodiesel production by Al2O3, Al2O3-NiO and Al2O3-CoO modified bentonite as catalyst." Revue Roumaine de Chimie 65, no. 9 (2020): 825–37. http://dx.doi.org/10.33224/rrch.2020.65.9.09.

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Bentonite clay from Maghnia (Algeria), very rich in montmorillonite (~ 90 %) purified and intercalated with pillars Al2O3, Al2O3-NiO and Al2O3-CoO, was applied as catalyst for the conversion of a mixture of castor oil-ethanol to biodiesel. The pillared clay with Al2O3-CoO (10%) led to 98% ester conversion. The highest yield of biodiesel production was obtained at 1/15 molar ratio of oil/ethanol, a temperature of 250 °C and 7.5 wt% of catalyst. This behaviour was ascribed to a synergetic effect of the largest surface area developed in the clay and the highest catalytic activity of cobalt in bas

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