Article
Polymer Science
Manawwer Alam, Mohammad Altaf, Naushad Ahmad
Summary: The researchers have developed a nanocomposite coating material using vegetable oil as a renewable resource, which exhibits excellent scratch resistance, corrosion protection, and high-temperature stability; this material is significant for eco-friendly and renewable resource alternatives to petro-based chemicals.
Article
Materials Science, Multidisciplinary
Ruhan Yang, Weijie Li, Ruibin Mo, Xinya Zhang
Summary: In this study, a series of recyclable biobased dynamic cross-linking epoxy polymers were synthesized using biobased materials under solvent-free conditions. The triamine cross-linker significantly influenced the properties of the polymers, and the polymer with polyetheramine T403 showed a good shape memory effect. The polymers exhibited good recyclability when the dynamic bond content was appropriate.
ACS APPLIED POLYMER MATERIALS
(2023)
Article
Polymer Science
Manawwer Alam, Naser M. Alandis, Javed Alam, Naushad Ahmad, Mohammad Asif Alam
Summary: This study focuses on the modification of PUMEA resin with different amounts of MWCNTs and comprehensive characterization of its properties, including physical properties, corrosion resistance, and thermal performance.
INTERNATIONAL JOURNAL OF POLYMER ANALYSIS AND CHARACTERIZATION
(2021)
Article
Multidisciplinary Sciences
Manawwer Alam, Mukhtar Ahmed, Naser M. Alandis, Mohammad Altaf, Yasser M. Almuhammadi, Ashfaq Ahmad
Summary: This study focuses on the preparation of nanocomposite coatings using sustainable resources such as corn oil. The coatings exhibited good physico-mechanical properties and corrosion resistance due to the presence of multiple functional groups and Fe2O3 nanoparticles.
JOURNAL OF KING SAUD UNIVERSITY SCIENCE
(2022)
Article
Biochemistry & Molecular Biology
Miguel R. Area, Belen Montero, Maite Rico, Luis Barral, Rebeca Bouza, Joaquin Lopez
Summary: In this work, green and fully biodegradable composites based on corn starch were successfully obtained by melt processing. The effects of different amounts of isosorbide plasticizer and PHBV microparticles on the composites' properties were studied. The results showed that the plasticization process was completed and the microparticles were homogeneously dispersed in the thermoplastic starch matrix without deformation or breaking. The biocomposites with suitable storage modulus and improved moisture resistance were completely biodegraded in soil, indicating their potential application in the packaging industry.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2022)
Article
Agricultural Engineering
Mohd Sofian Alias, Norinsan Kamil Othman, Siti Radiah Mohd Kamarudin, Mohd Hamzah Harun, Mahathir Mohamed, Nur Ubaidah Saidin, Siti Fatahiyah Mohamad, Zaifol Samsu
Summary: Replacing petroleum oil with renewable sources in producing polymer coating attracts many researchers. This study developed a palm oil-based urethane acrylate (POBUA) coating using UV irradiation for protecting mild steel. The presence of well-distributed graphite particles in the POBUA matrix enhances the coating's performance and reduces corrosion rate.
INDUSTRIAL CROPS AND PRODUCTS
(2022)
Article
Polymer Science
J. Pouladi, S. M. Mirabedini, H. Eivaz Mohammadloo, N. Ghasemi Rad
Summary: A bio-resource resin was synthesized from linseed oil via epoxidation and carbonation, leading to the formation of non-isocyanate polyhydroxy-urethane networks for improved corrosion resistance on mild steel. Mechanical properties of coating samples were evaluated with different carbonation weight percentages, showing increased adhesion and hardness with higher carbonation conversion rates. EIS study indicated enhanced corrosion resistance initially with increasing carbonation percentage, with the 75% carbonated sample showing comparable performance to PU-based coatings.
EUROPEAN POLYMER JOURNAL
(2021)
Article
Chemistry, Applied
T. O. Siyanbola, A. A. Ajayi, S. Vinukonda, K. K. Jena, S. M. Alhassan, P. Basak, E. T. Akintayo, Ramanuj Narayan, K. V. S. N. Raju
Summary: Surface modification of TiO2 with trimethylolpropane (TMP) was successfully carried out to prepare TiO2-TMP, which was incorporated into a polyol blend. A polymeric composite coating film with improved properties was synthesized using a one-pot method, and comprehensive evaluations were conducted on its morphology, thermal stability, mechanical properties, chemical resistance, antimicrobial activity, and corrosion resistance. The doped composites showed enhanced coating properties, especially PU-TiO2-TMP (1.0 wt%) with the highest percentage of TiO2-TMP nanoparticles.
PROGRESS IN ORGANIC COATINGS
(2021)
Article
Engineering, Environmental
Weihao Zhang, Tongyao Wang, Zhanhong Zheng, Rafael L. Quirino, Fei Xie, Yufeng Li, Chaoqun Zhang
Summary: This study successfully prepared green and safety plant oil-based non-isocyanate waterborne polyurethanes by carbonating linseed oil and polymerizing it with different diamines and hydrophilic moiety. Aromatic diamines, aliphatic diamines, and poly-ether diamines were used as chain extenders to tailor the performance of the resulting polyurethanes, and the robustness of the preparation route was evaluated.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Polymer Science
Janaya D. Sachs, Ian A. Tonks
Summary: The Pd-catalyzed carbonylative polymerization of alpha,omega-enol ethers has been reported, allowing the modification of polymer properties by varying the length of the diol fragment in the monomers. This polymerization strategy has been extended to include rigid and bioderived diol moieties, expanding the range of structures and properties accessible.
Article
Polymer Science
Jiaojun Tan, Shaowei Ruan, Meiyun Zhang, Hui He, Shunxi Song, Bin Yang, Jingyi Nie, Qiuyu Zhang
Summary: This study reports a method to transform cellulosic biomass into stabilizers for nonaqueous emulsions by decorating with alkyl chains. It is found that the length of the alkyl chains significantly influences the stability and type of the emulsions, which exhibit long-term stability. Water-sensitive interfacial polymerizations are successfully performed using these nonaqueous emulsions, producing capsules and particles.
Article
Chemistry, Multidisciplinary
Karen Cangul, Emrah Cakmakci, Ozgun Daglar, Ufuk Saim Gunay, Gurkan Hizal, Umit Tunca, Hakan Durmaz
Summary: Pressure from environmental NGOs and the public is driving research on innovative and renewable polymers and additives. A recent focus has been on bio-based green plasticizers that can be covalently attached to replace toxic phthalate-based plasticizers. In this study, azide-functionalized soybean oil derivative (AzSBO) was prepared and investigated as a plasticizer. The results showed that AzSBO improved the thermal, mechanical, and solvent absorption properties of the polymer.
Article
Agricultural Engineering
Yuchao Wu, Mingen Fei, Tingting Chen, Renhui Qiu, Wendi Liu
Summary: This study focuses on utilizing inexpensive palm oil to prepare renewable, property-tunable, and degradable thermoset resins for fiber-reinforced composites, which exhibit high strengths and moduli. These palm oil-based matrices can be decomposed in a mild alkali solution for recycling high-performance reinforcements.
INDUSTRIAL CROPS AND PRODUCTS
(2021)
Article
Chemistry, Applied
Yurany Villada, Helen Inciarte, Claudia Gomez, Sandra Cardona, Laura M. Orozco, Diana Estenoz, Luis Rios
Summary: Castor oil and dehydrated castor oil were used to synthesize alkyd-urethane resins through a two-stage process. The synthesized resins still contained hydroxyl groups, making them suitable for further urethane linkages. The cured films exhibited similar properties in terms of hardness, adhesion, chemical and water resistance, and gloss. Drying time was influenced by factors such as temperature, presence of double bonds, and solvent.
PROGRESS IN ORGANIC COATINGS
(2023)
Article
Biochemistry & Molecular Biology
Eraci Drehmer, Mari Angeles Navarro-Moreno, Sandra Carrera-Julia, Mari Luz Moreno
Summary: Fats are an important part of diet, and unsaturated fatty acids have different effects on oxidative metabolism. Olive oil, rich in monounsaturated fatty acids, increases antioxidant enzyme activity, while corn oil impairs cellular metabolism. Different tissues respond differently to olive oil and corn oil.
Article
Chemistry, Inorganic & Nuclear
Rizwan Wahab, Farheen Khan, Manawwer Alam, Javed Ahmad, Abdulaziz A. Al-Khedhairy
Summary: This study designed a sensor material for detecting urea using gamma-Al2O3QDs. The gamma-Al2O3QDs were processed and characterized, and their sensing efficiency with urea solution was tested. The performance of the gamma-Al2O3QDs/GCE sensor was evaluated with different parameters and a real sample analysis was conducted.
INORGANIC CHEMISTRY COMMUNICATIONS
(2023)
Article
Biochemistry & Molecular Biology
Meriem Elkolli, Hayet Elkolli, Manawwer Alam, Yacine Benguerba
Summary: The misuse and overuse of antibiotics have led to antibiotic resistance. However, terpene-rich essential oils provide a potential alternative for antimicrobial agents. In this study, we demonstrated the antibacterial activity of three plant essential oils and identified their binding energies with a critical enzyme involved in bacterial protein synthesis through molecular docking.
JOURNAL OF BIOMOLECULAR STRUCTURE & DYNAMICS
(2023)
Article
Green & Sustainable Science & Technology
Afroz Jahan, Shumaila Masood, Insha Shaily, Insha Sultan, Fahmina Zafar, Manawwer Alam, Anujit Ghosal, Qazi Mohd Rizwanul Haq, Nahid Nishat
Summary: Volatile organic compound (VOC) and crosslinker-free anti-corrosive polyurea (CPUrea) coatings were successfully developed using cardanol, formaldehyde, and urea through an acid catalysed, solvent-free in-situ approach for the first time. The optimized CPUrea1.0 resin showed superior coating performance in terms of physico-mechanical tests and thermal stability, with a homogeneous compact 3D crosslinked structure. It also demonstrated the ability to resist corrosive ions for an extended period and exhibited inhibition towards E. coli and S. aureus, making it a promising green coating material for protective applications.
JOURNAL OF CLEANER PRODUCTION
(2023)
Article
Engineering, Electrical & Electronic
Anees A. Ansari, M. A. Majeed Khan, M. Alam
Summary: Rare-earth PrFeO3 perovskite nanoparticles with a smooth surface and irregular spherical shape were prepared using ultrasonically assisted co-precipitation method. These nanoparticles were used as a sensing platform for the electrochemical detection of glucose concentrations in liquid samples. Electrochemical techniques were employed to investigate the electro-catalytic features of the fabricated electrode, demonstrating its wide glucose detection range, fast response, long linearity, and high sensitivity.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2023)
Article
Materials Science, Multidisciplinary
Rizwan Wahab, Manawwer Alam
Summary: This study utilized aluminum oxide quantum dots (γ-Al2O3QDs) for concentration-based analysis of hydrogen peroxide (H2O2). The γ-Al2O3 was synthesized through a hydrothermal solution process and characterized in detail. The γ-Al2O3 QDs were employed for the detection of H2O2 and their sensing efficiency was evaluated with a three-electrode system.
MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Adnan Shahzaib, Fahmina Zafar, Shabnam Khan, Brahmjot Kaur, Anujit Ghosal, Manawwer Alam, Mudsser Azam, Qazi Mohd Rizwanul Haq, Nahid Nishat
Summary: A facile route for formulating metal (Mn(II)) coordinated bio-polyurethane films/coatings with high superhydrophobicity and other enhanced properties has been reported. The coordination with metal ions greatly improves the chemical resistance, swelling ability, and mechanical properties of the coatings. The formulated Mn(II)-coordinated PU also shows good thermal stability, flame retardancy, and anticorrosion performance, making it a potential multi-functional surface-protective material.
MATERIALS TODAY COMMUNICATIONS
(2023)
Article
Green & Sustainable Science & Technology
Shumaila Masood, Anujit Ghosal, Fahmina Zafar, Manawwer Alam, Nahid Nishat
Summary: Phenalkamines (PhAA) are used as curing agents for epoxies and polyureas. This study focused on the polymerization and conversion of PhAA resin to anti-corrosive coatings for mild steel substrate. PolyPhAA resin was prepared using cashew nut shell liquid, aldehyde, and amine, and showed excellent coating properties. The PolyPhAA2 coating exhibited hydrolytic stability, anti-icing ability, strong adhesion, and corrosion protection, making it a potential alternative to petroleum-based coatings.
MATERIALS TODAY SUSTAINABILITY
(2023)
Article
Chemistry, Physical
Shakeel Alvi, Manawwer Alam, Rashid Ali
Summary: The popularity of multicomponent reactions (MCRs) lies in their versatility and simplicity, which allows for the synthesis of a variety of valuable bioactive products and fine chemicals. In this paper, a simple and efficient protocol for assembling diverse indole-based 4H-chromenes using a low melting mixture of choline chloride and urea is reported. This method makes use of inexpensive and easily accessible starting materials and the reaction medium can be recycled without loss of yield or catalytic activity. Additionally, the reaction medium serves as both a solvent and catalyst, eliminating the need for volatile organic solvents and corrosive catalysts. Preliminary photophysical properties of the synthesized molecules are also investigated. This method, combining a green reaction medium and catalyst-free multicomponent procedure, offers new possibilities for the synthesis of a wide range of indole and chromene based heterocycles under mild conditions.
JOURNAL OF MOLECULAR LIQUIDS
(2023)
Article
Chemistry, Physical
Anis Madaci, Hana Ferkous, Amel Sedik, Amel Delimi, Cherifa Boulechfar, Amina Belakhdar, Malika Berredjem, Mohamed Aymen Chaouch, Manawwer Alam, Hatem Majdoub, Nicole Jaffrezic-Renault, Yacine Benguerba
Summary: Corrosion causes significant damage and financial losses annually. Scientists are exploring the use of inhibitors derived from renewable resources and natural ingredients to minimize environmental impact. The inhibition effects of PPUN derived from prickly pear nopales have been studied using electrochemical methods, revealing its ability to slow down corrosion processes by adsorbing on the metal surface and inhibiting active corrosion sites.
JOURNAL OF MOLECULAR LIQUIDS
(2023)
Article
Chemistry, Physical
Ishfaq Ahmad Rather, Manawwer Alam, Ufana Riaz, Rashid Ali
Summary: A new one-walled meso-cyanophenyl functionalized calix[4]pyrrole (4) was synthesized using both conventional strategy and deep eutectic solvent technique. The binding ability of receptor 4 with various anions was successfully studied using UV-Vis spectroscopy and TDDFT. The significant enhancement in anion binding of receptor 4 compared to C4P was attributed to the p-acidity of the cyanophenyl moiety and the cooperative effect of the NH-hydrogen bonding and anion-p interactions.
JOURNAL OF MOLECULAR STRUCTURE
(2023)
Article
Engineering, Environmental
Manawwer Alam, Anujit Ghosal, Fahmina Zafar, Mukhtar Ahmed, Mohammad Altaf
Summary: The study explores the use of environmentally friendly polymers derived from vegetable oil to replace harmful petrochemical-based polymers. The impact of variations in d-orbital electrons on the functional properties was evaluated using corn oil and different transition metals (Co/Cu). The incorporation of these metals improved the physicochemical, thermal, and electrochemical properties of the resulting metallopolymers.
JOURNAL OF POLYMERS AND THE ENVIRONMENT
(2023)
Article
Materials Science, Composites
Manawwer Alam, Mukhtar Ahmed, Mohammad Altaf
Summary: In this study, a melanized corn oil-based polymer nanocomposite was synthesized by incorporating graphene oxide (GO) in different ratios. The results showed that the addition of 0.5 wt% GO significantly enhanced the thermal stability and corrosion resistance of the coating. The dispersion of GO nanosheets into the polymer matrix improved the mechanical and thermal properties of the coatings.
POLYMER COMPOSITES
(2023)
Article
Chemistry, Multidisciplinary
Manawwer Alam, Anujit Ghosal, Fahmina Zafar, Mukhtar Ahmed, Mohammad Altaf
Summary: The objective of this study was to develop an eco-friendly polymeric coating material by formulating an oleo-polymer hybridized with metallic ions through coordination bonding. The formation of nanoclusters within the polymeric matrix was confirmed by SEM and TEM analysis. Surprisingly, the metal ions with fully filled d-orbital (Zn2+) showed better thermal and anti-corrosion properties compared to Mn2+. The impact of d-orbital electrons on the corrosion protective performance was studied using EIS and PDP tests.
Article
Polymer Science
Wejdan Al-Otaibi, Naser M. M. Alandis, Manawwer Alam
Summary: This article presents the synthesis of polyesteramide (PEA) resin from Leucaena leucocephala oil (LLO) derived from L. leucocephala seeds grown in King Saud University Campus. The synthesis involved the conversion of LLO into amide diol by catalytic amidation reaction, followed by esterification with malic acid (MA) to produce LLO-based PEA (LPEA). Solvent and catalyst-free synthesis was employed. Characterization techniques confirmed the successful formation of LPEA by introducing amide and ester groups. LPEA was further enhanced with nano graphene oxide (GO) and applied as nanocomposite corrosion protective coatings (LPEA/GO), showing excellent corrosion resistance performance in 3.5 w/w% NaCl medium. Thermogravimetric analysis exhibited good thermal stability of the coatings up to 200 degrees C.
Article
Chemistry, Multidisciplinary
Aicha Rizi, Amel Sedik, Anissa Acidi, Khadidja Otmane Rachedi, Hana Ferkous, Malika Berredjem, Amel Delimi, Amdjed Abdennouri, Manawwer Alam, Barbara Ernst, Yacine Benguerba
Summary: This study evaluated the inhibitory properties of essential oils extracted from the Cuminum cyminum plant on mild steel corrosion in hydrochloric acid. The results showed that the Cuminum cyminum extract effectively reduced the corrosion of mild steel and formed a protective layer. The study also investigated the inhibition mechanism using various analytical techniques and simulations.
