Article
Polymer Science
Brindusa Balanuca, Cristina Ott, Celina Maria Damian, Horia Iovu, Roxana Trusca, Raluca Stan
Summary: In this study, bicomponent polymeric architectures were fabricated through visible-light polymerization using methacrylated and PEGylated high oleic sunflower oil (HO-SFO) monomers and compatible polyethylene glycol dimethacrylate (PEG-DMA). The amount of PEG-DMA and PEG units grafted on the HO-SFO backbone directly influenced the key properties of the oil-based polymers, affecting crystallinity degree and PBS absorption capacity. PEG chains acted as mediators for hydrophobic and hydrophilic components, impacting system mobility and network arrangement, leading to higher PBS absorption.
POLYMERS FOR ADVANCED TECHNOLOGIES
(2021)
Article
Food Science & Technology
Susana Gonzalez-Ramila, Raquel Mateos, Joaquin Garcia-Cordero, Miguel A. Seguido, Laura Bravo-Clemente, Beatriz Sarria
Summary: The study found that regular consumption of olive pomace oil (OPO) can reduce total cholesterol, LDL cholesterol, and waist circumference. It also found that malondialdehyde levels decreased after OPO intake in healthy subjects. In contrast, the consumption of sunflower oil led to an increase in apolipoprotein B and the apolipoprotein B/Apo A ratio. OPO intake may improve cardiometabolic risk in both healthy and hypercholesterolemic subjects.
Article
Energy & Fuels
Nisha Singh, Priyanka Agarwal, Jyoti Porwal, Suheel K. Porwal
Summary: In recent years, there has been a significant increase in the use of petroleum-based products in the transportation and industrial sectors, which has resulted in environmental damage and concerns about future energy security. Waste cooking oil is considered the best alternative to mineral oil in the lubricant industry. In this study, waste cooking oil extracted using curcumin from soybean oil was doped with multifunctional green additives. The formulated biolubricant exhibited improved viscosity, viscosity index, pour point, and rheological behavior, making it suitable for extreme temperature conditions.
BIOMASS CONVERSION AND BIOREFINERY
(2022)
Article
Agricultural Engineering
Sampa Dutta, Mahua Ghosh, Debarati Mitra
Summary: Polyethylene glycol esters (PEGEs), as environment-friendly biolubricants, were produced from different fatty acids derived from plant oils using immobilized Candida antarctica Lipase B (NS 435) biocatalyst. The study aimed to improve the thermo-oxidative stability and cold flow behavior of the esterified products.
INDUSTRIAL CROPS AND PRODUCTS
(2023)
Review
Polymer Science
Gobinda Karmakar, Koushik Dey, Pranab Ghosh, Brajendra K. Sharma, Sevim Z. Erhan
Summary: The review discussed the synthesis and characterization of polymers and polymer composites derived from vegetable oils for use as multifunctional additives in eco-friendly lubricant formulations. The additives showed excellent performance as viscosity index improvers, pour point depressants, and antifriction additives when blended with lubricating base oils. These environmentally friendly additives were found to be non-toxic and biodegradable, outperforming commercial petroleum-based additives.
Article
Biochemistry & Molecular Biology
Sandra Arias, Eva Maron, Hans G. Boerner
Summary: Tailor-made copolymers based on a peptide-poly(ethylene glycol) conjugate were designed to solubilize the photosensitizer m-THPC. Through controlled radical polymerization, a series of copolymer-PEG solubilizers were synthesized with varying functional segment lengths and side chain functionalizations, showing improved hosting and release properties compared to the parent peptide-PEG conjugate.
Review
Chemistry, Multidisciplinary
Nazanin Nasrollahi, Leila Ghalamchi, Vahid Vatanpour, Alireza Khataee, Maryam Yousefpoor
Summary: This review paper provides an overview of the role of polymeric additives in the fabrication of polymeric membranes. The additives can influence the formation of pores, permeability, hydrophilicity, and even the creation of desirable properties such as antifouling and antibacterial properties. Different methods of incorporating additives into polymeric matrix are explored to identify the best additives for various types of polymeric membranes. The compatibility of additive polymers with matrix polymers and the effectiveness of functional additives are also discussed.
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
(2022)
Article
Agricultural Engineering
Sergio Nogales-Delgado, Jose Maria Encinar, Alvaro Gonzalez Cortes
Summary: The study aimed to produce biodiesel and biolubricant from high oleic safflower, resulting in products with higher oxidative stability and not requiring antioxidant additives, thus leading to a cleaner and more sustainable production process.
INDUSTRIAL CROPS AND PRODUCTS
(2021)
Article
Engineering, Mechanical
Alfonso Sierra, Michael G. Coleman, Patricia Iglesias
Summary: In this study, a series of novel halogen-free borate-based protic ionic liquids were synthesized and found to effectively reduce friction and wear. When mixed with a biolubricant, the reduction in friction and wear was even more significant. The formation of a self-assembled adsorbed layer was identified as the key factor in the friction reduction.
Article
Energy & Fuels
Selin Sahin, Ebru Kurtulbas, Irem Toprakci, Ayse Gizem Pekel
Summary: The study found that both o-coumaric acid and synthetic additives significantly increased the shelf life of sunflower oil, as well as enhancing its antioxidant properties and total phenolic content. The impact of different additives on the oil varied slightly.
BIOMASS CONVERSION AND BIOREFINERY
(2021)
Article
Food Science & Technology
Jiechang Chen, Yuanyuan Zhao, Runlin Wu, Tao Yin, Juan You, Benlun Hu, Caihua Jia, Jianhua Rong, Ru Liu, Binjia Zhang, Siming Zhao
Summary: Frying shrimp in high-oleic sunflower oil leads to increased color difference and higher levels of acidity, carbonyls, and total oxidation in the oil. The major oxidation products formed during frying are alkenals, alkadienals, and conjugated hydroperoxides. However, the proportion of oleic acid in the frying oil increases with longer frying times. These findings contribute to our understanding of the oxidative deterioration of high-oleic oils during frying and have important implications for their application properties.
Article
Chemistry, Physical
Fatima Marino, Enriqueta R. Lopez, Angela Arnosa, Manuel A. Gonzalez Gomez, Yolanda Pineiro, Jose Rivas, Carmen Alvarez-Lorenzo, Josefa Fernandez
Summary: In this study, oleic acid coated zinc oxide nanoparticles were successfully synthesized and characterized for their thermal and tribological properties. The concentration of nanoparticles affected the density and viscosity, with the optimal concentration at 0.25 wt% showing the best tribological performance. The spherical shape of the nanoparticles and the mending effect were identified as the main factors contributing to the superior performance of the nanolubricant compared to the base oil.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Article
Chemistry, Physical
Long Dong, Yiqiang Li, Jing Wen, Wenbin Gao, Yuqing Tian, Qingchun Deng, Zheyu Liu
Summary: This study investigated and compared two types of polymeric surfactants with different molecular structures. The results showed that the polymeric surfactant with a spatial network structure exhibited better enhanced oil recovery performance, with excellent thickening, shear-resistance, and salt-resistance abilities.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Article
Thermodynamics
Isha Srivastava, Fateh Singh, Ankit Kotia, Subrata Kumar Ghosh
Summary: The rheological properties of graphene and MWCNT graphene nanolubricants in engine oil were evaluated using experimental and regression methods. The results showed that the nanolubricants significantly increased viscosity. A new regression model was also proposed to predict the viscosity of nanolubricants.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2022)
Article
Engineering, Chemical
Jose Maria Encinar, Sergio Nogales-Delgado, Antonio Pinilla
Summary: The research focused on the production of rapeseed biolubricant through double transesterification in a batch reactor, with the goal of designing a reactor based on the properties of the biolubricant and the demand in Spain. The study resulted in the successful production of a SAE 10W30 biolubricant suitable for Diesel engines, utilizing a pseudo-first reaction order and a reactor volume of 9.66 m(3) for national level production.
Article
Biochemistry & Molecular Biology
Antonio M. Borrero-Lopez, Concepcion Valencia, David Ibarra, Ignacio Ballesteros, Jose M. Franco
Summary: This study explores the potential of using lignin-enriched waste products from bioethanol production as thickeners for lubricating greases. The content of lignin and hydroxyl ratio were found to influence the NCO-functionalization and rheological response of the resulting oleogels, with barley straw residues exhibiting the highest storage modulus.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2022)
Article
Polymer Science
M. Borrego, J. E. Martin-Alfonso, C. Valencia, M. C. Sanchez, J. M. Franco
Summary: This work focuses on improving the electrospinnability of low-sulfonate lignin/polyvinylpyrrolidone solutions by adding surfactants and studying the resulting nanofibers' ability to structure castor oil. The addition of surfactants improves electrospinnability, producing more compact and uniform fiber mats in certain systems. These nanofiber mats dispersed in castor oil can generate physically stable strong oleogels, which exhibit excellent lubrication performance and potential applications as lubricants.
Article
Engineering, Chemical
Leif Ahme, Erik Kuhn, Miguel Angel Delgado Canto
Summary: One of the key aspects in tribological studies is the investigation of lubrication process using an energetical approach. In this research, the mechanical structural degradation induced by shear stress in lubricating greases was examined, along with the influence of thickener and base oil on the degradation process and mechanical energies. The results shed light on the characteristics and behavior of lubricating greases.
Article
Chemistry, Multidisciplinary
Alba Blanquez, Antonio M. Borrero-Lopez, Gabriela Dominguez, Concepcion Valencia, Jose M. Molina-Guijarro, Maria E. Eugenio, David Ibarra, Manuel Hernandez
Summary: This study analyzed the compositional and structural modification of extracted lignins from barley and wheat straws that were biologically pretreated with Streptomyces. The results showed that the MDG301 strain exhibited better ligninsolubilization and higher hydrolytic enzymatic profile compared to the MDG147 strain. Soda pulping also caused structural changes in the lignins, resulting in excellent adhesive properties. The lignins extracted from barley straw showed the best performance in shear strength tests, while those from wheat straw performed well in peeling essays.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2022)
Article
Agricultural Engineering
J. F. Rubio-Valle, M. C. Sanchez, C. Valencia, J. E. Martin-Alfonso, J. M. Franco
Summary: In this study, electrospun lignin/cellulose acetate fiber-bead nanostructures were developed as structuring agents for vegetable oils to be used as eco-friendly lubricating oleogels. The morphology of the electrospun nanostructures was found to be strongly dependent on the rheological properties of the biopolymer solution. The rheological properties of these gel-like dispersions can be tailored through concentration and ratio, and the resulting oleogels have comparable properties to conventional lubricants.
INDUSTRIAL CROPS AND PRODUCTS
(2022)
Article
Agricultural Engineering
S. D. - Fernandez-Silva, M. A. Delgado, M. V. Ruiz-Mendez, I. Giraldez, M. Garcia-Morales
Summary: This study investigates the feasibility of using waste cooking oils as eco-lubricants and separates them into lighter and heavier fractions through molecular distillation. A comprehensive chemical characterization is conducted, revealing high viscosity index values in waste cooking oils with low polar compounds and acidity levels. It is also found that the lighter fractions composed of free fatty acids demonstrate improved oxidative resistance, while the heavier fractions exhibit better thermal stability. Furthermore, both fractions show enhanced friction-reducing capability compared to their parent waste cooking oils.
INDUSTRIAL CROPS AND PRODUCTS
(2022)
Article
Chemistry, Physical
E. Cortes-Trivino, J. Cubero-Cardoso, A. Tenorio-Alfonso, M. A. Fernandez-Recamales, C. Valencia, J. Urbano, J. M. Franco
Summary: This study investigates the usage of natural deep eutectic solvents (NADESs) with different hydroxyl group content as a matrix base in reactions involving lignin-enriched fraction. The NADESs were prepared by mixing citric acid with glycerol, xylitol, and sucrose as the hydrogen bond donor compounds. Waste lignocellulose was additionally epoxidised to be used as a thickening agent for the NADESs. The research successfully achieved chemical interaction between NADESs and epoxidised lignocellulose, resulting in various rheological responses.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Editorial Material
Polymer Science
Clara Delgado-Sanchez, Adrian Tenorio-Alfonso, Esperanza Cortes-Trivino, Antonio M. Borrero-Lopez, Concepcion Valencia
Article
Materials Science, Multidisciplinary
M. Borrego, J. E. Martin-Alfonso, C. Valencia, Maria del Carmen Sanchez Carrillo, J. M. Franco
Summary: The development of environment-friendly natural polymer gel-like dispersions in oil media, with functional properties, in terms of formulation design and synthesis protocol, is still a cutting-edge research area. This study focuses on the manufacture of electrospun ethylcellulose (EC) nanofibrous webs and their usage as thickeners for vegetable oils. The concentration, molecular weight, and binary solvent systems of EC were found to affect the electrospinnability and rheological properties of the nanofiber dispersions. The morphology of the EC nanofiber web plays a crucial role in their physical stabilization and rheological behavior. This work proposes an innovative approach to produce bio-based oleogel-like dispersions that have potential applications in various sectors.
ACS APPLIED POLYMER MATERIALS
(2022)
Article
Materials Science, Paper & Wood
J. F. Rubio-Valle, C. Valencia, M. Sanchez, J. E. Martin-Alfonso, J. M. Franco
Summary: In this study, electrospun Kraft lignin/cellulose acetate nanostructures were produced and investigated as structuring or thickening agents in castor oil for lubricating applications. The morphology of the electrospun nanofibers was influenced by the rheological properties, electrical conductivity, and surface tension of KL/CA solutions, which were in turn affected by the chemical structure and composition of the Kraft lignins. The resulting oleogels, based on KL/CA electrospun nanostructures, exhibited desirable rheological and tribological properties, making them a promising sustainable alternative to conventional lubricating greases.
Article
Polymer Science
Maria Borrego, Jose E. Martin-Alfonso, Concepcion Valencia, M. Carmen Sanchez, Jose M. Franco
Summary: This study introduced a novel strategy for manufacturing thickened gel-like castor oil formulations by dispersing electrospun lignin/ethylcellulose nanostructures, potentially serving as eco-friendly lubricating greases. By controlling the ratio and concentration of lignin and ethylcellulose, the morphology and dispersibility of the nanostructures in oil can be adjusted, demonstrating satisfactory frictional response comparable to traditional lithium-lubricating greases.
Article
Biochemistry & Molecular Biology
Antonio M. Borrero-Lopez, Ling Wang, Haiming Li, Tainise Lourencon, Concepcion Valencia, Jose M. Franco, Orlando J. Rojas
Summary: Acetylated Kraft lignins were used to structure vegetable oils into oleogels. Microwave-assisted acetylation at higher temperatures resulted in gel-like oil dispersions with improved viscoelastic properties and stronger shear-thinning character, along with enhanced long-term stability. The modified lignins enhanced the stability of water-in-oil Pickering emulsions by enhancing hydrogen bonding between the oil and nanoparticles.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2023)
Article
Chemistry, Multidisciplinary
Maria Borrego, Erik Kuhn, Jose E. Martin-Alfonso, Jose M. Franco
Summary: In this study, different lignin nanostructures were obtained through electrospinning and used as thickeners in bio-based lubricating greases. The impact of nanofibrous network morphology on friction and wear was investigated. The results showed that homogeneous bead-free nanofiber mats as thickeners can effectively reduce friction and wear.
Article
Engineering, Environmental
J. F. Rubio-Valle, C. Valencia, M. C. Sanchez, J. E. Martin-Alfonso, J. M. Franco
Summary: This study explores the use of spent coffee grounds and post-consumer PET bottles to produce electrospun composite nanofibers, aiming to develop a new route for upcycling them into high-value oil-based products. By adjusting the ratio of coffee grounds and PET bottles, the properties of the fibers and oleogels can be modified.
RESOURCES CONSERVATION AND RECYCLING
(2023)
