Article
Materials Science, Textiles
Gourab Ghosh, Sudeshna Saha, Sundipan Bhowmick
Summary: In this study, Crotalaria juncea bast fibers were pretreated and hydrolyzed with sulfuric acid to obtain chemically purified cellulose and cellulose nanocrystals (CNCs). Two different pretreatment methods were examined for CNC preparation, and it was found that pretreatment-I was more effective in terms of crystallinity and surface sulfate ester groups. The optimized process conditions for pretreatment-I resulted in CNCs with a yield of approximately 43%, a crystallinity index of 80.9%, and a rod-like structure with a length of 120 +/- 26 nm and a diameter of 25 +/- 5.5 nm. The optimized CNCs also exhibited a surface charge density of 0.34 meqv/g and a zeta potential of -27.7 mV, indicating stable dispersion.
JOURNAL OF NATURAL FIBERS
(2023)
Article
Engineering, Environmental
Amina Hachaichi, Benalia Kouini, Lau Kia Kian, Mohammad Asim, Mohammad Jawaid
Summary: This study successfully extracted microcrystalline cellulose (MCC) from Algerian date palm tree fruit bunch branches fibers, demonstrating its high performance and cost-effectiveness for use in composite materials. Additionally, the extracted MCC showed increased crystallinity and thermal stability compared to raw date palm fibers, indicating its potential application in various fields for producing ecofriendly bionanocomposites.
JOURNAL OF POLYMERS AND THE ENVIRONMENT
(2021)
Article
Materials Science, Textiles
Kusmono, M. N. Affan
Summary: In this study, nanocrystalline cellulose (NCC) was successfully isolated from ramie fibers through chemical pretreatments and phosphoric acid hydrolysis. The characteristics of NCC were found to be significantly affected by the acid concentration but not the hydrolysis time.
JOURNAL OF NATURAL FIBERS
(2022)
Article
Materials Science, Textiles
R. Gopinath, P. Billigraham, T. P. Sathishkumar
Summary: This paper investigates the properties of a new cellulosic fiber derived from the bark of Bauhinia purpurea, including mechanical strength, crystallinity, tensile strength, Young's modulus, and thermal properties. Test results show that the Bauhinia purpurea fiber is suitable for making high-strength and low-density biodegradable composites.
JOURNAL OF NATURAL FIBERS
(2022)
Article
Materials Science, Composites
Kahina Iggui, Mustapha Kaci, Nicolas Le Moigne, Anne Bergeret
Summary: The study investigated the hygrothermal aging of neat PHBV and PHBV/C30B at high temperature and humidity conditions. Results showed that PHBV bionanocomposite exhibited better resistance towards hygrothermal aging, but suffered from reduced crystallinity, melting temperature, thermal stability, and altered mechanical and viscoelastic properties under such conditions.
POLYMER COMPOSITES
(2021)
Article
Polymer Science
Anish Khan, Mohammad Jawaid, Lau Kia Kian, Aftab Aslam Parwaz Khan, Abdullah M. Asiri
Summary: In this study, Conocarpus fiber was chemically pre-treated and hydrolyzed at different times to produce nanocrystalline cellulose (NCC) particles. The NCC product retained high yield and showed a relatively pure cellulose composition with strong crystalline structure and enhanced heat resistance. The extracted NCC from Conocarpus fiber has the potential to be a green nano-filler for developing nanocomposite materials in the future.
Article
Materials Science, Textiles
R. Gopinath, P. Billigraham, T. P. Sathishkumar
Summary: The global demand for plastics has been continuously increasing at a rapid rate, causing pollution to the atmosphere and oceans during their disposal. This paper reports the physicochemical, thermal, mechanical, and morphological characteristics of a novel cellulosic fiber extracted from the bark of Tithonia diversifolia (TD), which has properties suitable for making green composites.
JOURNAL OF NATURAL FIBERS
(2023)
Article
Polymer Science
Edyta Malachowska, Dominika Pawcenis, Jacek Danczak, Joanna Paczkowska, Kamila Przybysz
Summary: The degradation of cellulose significantly impacts the mechanical, optical, physical, and chemical properties of paper, affecting its longevity. Analytical techniques such as size-exclusion chromatography and spectroscopy are used to evaluate the degradation processes, particularly in papers containing lignin. Humidity was found to alter cellulose chain lengths, with high lignin content suppressing some degradation pathways. This knowledge can guide the development of strategies and chemical treatments to prevent paper aging.
Article
Nanoscience & Nanotechnology
Jun Soo Park, Min Seop Kim, Min Yeong Joung, Hyun Jin Park, Myoung-Jin Ho, Jun Hyuk Choi, Jae Hee Seo, Woo Heon Song, Young Wook Choi, Sangkil Lee, Yong Seok Choi, Myung Joo Kang
Summary: MTK parenteral nanocrystalline suspension (NS) delivery system has been successfully designed and evaluated for its pharmacokinetics profile and local tolerability. The experiment demonstrated that the nanocrystalline suspension provided prolonged drug release in rats with resolved inflammation at the injection site after 4 weeks.
INTERNATIONAL JOURNAL OF NANOMEDICINE
(2022)
Article
Materials Science, Paper & Wood
Han Wang, Hiroki Kataoka, Satoru Tsuchikawa, Tetsuya Inagaki
Summary: This study used terahertz time-domain spectroscopy (THz-TDS) and X-ray powder diffraction to track the transformation of cellulose crystalline lattice from cellulose I to cellulose II. It was found that cellulose II exhibited three characteristic peaks in the THz absorption coefficient spectra. The THz absorption coefficient spectra of samples treated with different concentrations of NaOH could be considered a combination of fitting curves of cellulose I and cellulose II, multiplicatively scaled by coefficients that reflected their relative contents.
Article
Chemistry, Physical
Amina Hachaichi, Benalia Kouini, Lau Kia Kian, Mohammad Asim, Hassan Fouad, Mohammad Jawaid, Mohini Sain
Summary: Date palm fiber is a natural biopolymer rich in lignocellulosic components, making it suitable for extracting small particles like microcrystalline cellulose (MCC) and nanocrystalline cellulose (NCC). The isolated NCC from date palm MCC, with different hydrolysis times, showed high crystallinity, small particle size, and stable heat resistance, indicating its potential for various applications in biomedical and food packaging fields.
Article
Materials Science, Textiles
R. Gopinath, P. Billigraham, T. P. Sathishkumar
Summary: This study focused on the extraction and characterization of novel cellulosic fibers from the bark of Markhamia lutea tree. The fibers were found to have a high cellulose content, low density, and high tensile strength, making them ideal for lightweight applications. The thermal degradation behavior of the fibers was also investigated, revealing their potential for use in green composites.
JOURNAL OF NATURAL FIBERS
(2022)
Article
Materials Science, Textiles
A. Vinod, R. Vijay, D. Lenin Singaravelu, M. R. Sanjay, Suchart Siengchin, Y. Yagnaraj, Shakeel Khan
Summary: This study investigates the properties of lignocellulose fiber from the stem of Cardiospermum Halicababum. Analysis revealed that CHF contains high levels of cellulose, hemicellulose, and lignin, with a substantial crystallinity index and thermal stability. CHF demonstrates a high tensile strength and morphology characteristics indicating minimal lacuna space between cell walls.
JOURNAL OF NATURAL FIBERS
(2021)
Article
Materials Science, Textiles
R. Gopinath, P. Billigraham, T. P. Sathishkumar
Summary: This paper reports on the physical, mechanical, thermal properties, and chemical composition of a novel lignocellulosic fiber extracted from the bark of Albizia saman. The results indicate that the fiber possesses essential characteristics required for reinforcing composites, making it suitable for producing green composites.
JOURNAL OF NATURAL FIBERS
(2022)
Article
Biochemistry & Molecular Biology
Dewi Sartika, Amanda Patappari Firmansyah, Isnam Junais, I. Wayan Arnata, Farah Fahma, Afrinal Firmanda
Summary: In this study, corn cob was successfully converted into nanocrystalline cellulose, which has potential applications in polymer composites due to its high thermal stability. The method used was simple, cost-effective, environmentally friendly, and yielded high purity cellulose.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2023)
Article
Engineering, Multidisciplinary
Marya Raji, Laila El Foujji, Mohamed El Mehdi Mekhzoum, Mounir El Achaby, Hamid Essabir, Rachid Bouhfid, Abou el Kacem Qaiss
Summary: In this study, pH-sensitive films based on anthocyanin molecules from red cabbage and sepiolite mineral nano-clay as functional additives were fabricated and characterized. The films exhibited good mechanical properties, hygroscopicity, and pH sensitivity, making them suitable for monitoring the spoilage of food products.
JOURNAL OF BIONIC ENGINEERING
(2022)
Article
Environmental Sciences
Hind Abdelaoui, Marya Raji, Hamid Essabir, Rachid Bouhfid, Abou Eel Kacem Qaiss
Summary: The study successfully manufactured hybrid laminate composites based on natural long fiber combinations such as jute/coir and jute/doum, and investigated the effects of clay incorporation, natural fiber hybridization, and long-term aging on mechanical, physical, and morphological properties. The mechanical properties of the composites increased with clay content up to 15 wt%. Long-term aging resulted in a significant decrease in rigidity, tensile strength, and complex modulus, mainly attributed to relaxation of polymeric chains and deterioration of natural fibers.
WASTE AND BIOMASS VALORIZATION
(2022)
Article
Chemistry, Inorganic & Nuclear
Badr Baach, Moussa Ouakki, Soumya Ferraa, Hanane Barebita, Mohammed Cherkaoui, Abderrazak Nimour, Taoufik Guedira
Summary: New crystalline compounds based on an oxygen-deficient fluorite structure were synthesized and tested as corrosion inhibitors for mild steel in hydrochloric acid solution. The inhibitor efficiency was observed to increase with concentration, reaching a maximum of 93.7% for one compound at room temperature. The inhibitors exhibited excellent performance, although their effectiveness decreased at higher temperatures. Thermodynamic parameters were also calculated and discussed.
INORGANIC CHEMISTRY COMMUNICATIONS
(2022)
Article
Biochemistry & Molecular Biology
Mohamed Hamid Salim, Zineb Kassab, El-houssaine Ablouh, Houssine Sehaqui, Adil Aboulkas, Rachid Bouhfid, Abou El Kacem Qaiss, Mounir El Achaby
Summary: There has been significant interest in using marine biomass as a sustainable resource for water treatment in recent decades. In this study, the potential use of green macroalgae (Codium tomentosum) for cellulose-based foam production was investigated. A macroporous cellulose monolith was prepared from cellulose hydrogel using freeze-drying, and was found to have high swelling ratio and mechanical rigidity. The resulting cellulosic material was used as a bio-sorbent for wastewater treatment, specifically for removing methylene blue dye. The study found that the adsorption equilibrium was reached within 660 minutes, and the maximum adsorption capacity was 454 mg/g. The findings suggest that the produced cellulose monolith could be a sustainable adsorbent for water treatment.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2022)
Article
Biochemistry & Molecular Biology
Khadija El Bourakadi, Abou el Kacem Qaiss, Rachid Bouhfid
Summary: This study analyzed the effects of encapsulated modified montmorillonite on the properties of chitosan films. The results showed that adding encapsulated reinforcing agents can improve the mechanical and water barrier properties of chitosan films.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2022)
Review
Materials Science, Multidisciplinary
Brahim El Allaoui, Hanane Chakhtouna, Nadia Zari, Rachid Bouhfid, Abou el Kacem Qaiss
Summary: Nanofiltration (NF) membranes are eco-friendly and effective separation technology. However, biofouling is a major issue that restricts their long-term use. Functionalization of NF membranes with nanomaterials is a promising strategy to overcome this problem. This review provides a comprehensive study of biofouling mechanisms, strategies for control and monitoring, as well as recent developments in functionalization of NF membranes.
EMERGENT MATERIALS
(2022)
Article
Materials Science, Paper & Wood
Marya Raji, Hamid Essabir, Mounir ElAchaby, Rachid Bouhfid, Abou El Kacem Qaiss
Summary: The aim of this study is to use cellulose fibers as Janus nanocylinders to improve the phase separation and coalescence in poly(lactic) acid/polypropylene bio-blend polymers by promoting the selective localization of cellulose fibers at the interface through chemical modification. The mechanical and rheological properties of the resulting nanocomposites were greatly enhanced compared to the neat matrix, which can be attributed to the improved adhesion between the polymers and the tunable morphology of the bio-blends.
Article
Chemistry, Inorganic & Nuclear
Badr Baach, Soumya Ferraa, Hanane Barebita, Abderrazak Nimour, Taoufik Guedira
INORGANIC CHEMISTRY COMMUNICATIONS
(2022)
Article
Plant Sciences
Soukaina Chaouqi, Natalia Moratalla-Lopez, Gonzalo L. Alonso, Candida Lorenzo, Abdelmjid Zouahri, Nazha Asserar, El Mehdi Haidar, Taoufiq Guedira
Summary: Climate and soil affect the quality of saffron, which is determined by secondary metabolites. The study analyzed saffron samples using HPLC-DAD and analyzed soil samples using physicochemical methods, ED-XRF fluorescence, and X-ray diffraction. Saffron grown in loam-clay-sand soils contained high levels of crocins and kaempferol 3-sophoroside 7-glucoside, but low levels of safranal. Saffron grown in soils rich in organic matter, phosphorus, and potassium also had high levels of crocins and kaempferol 3-sophoroside 7-glucoside, but low levels of safranal. The presence of clays with low iron content was found to have a positive effect on the coloring strength of saffron.
Correction
Biochemistry & Molecular Biology
M. Rbaa, M. Fardioui, Chandrabhan Verma, Ashraf S. Abousalem, M. Galai, E. E. Ebenso, T. Guedira, B. Lakhrissi, I. Warad, A. Zarrouk
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2023)
Article
Chemistry, Multidisciplinary
M. En-Nylly, S. Skal, Y. El Aoufir, H. Lgaz, Raihana J. Adnin, Awad A. Alrashdi, A. Bellaouchou, M. R. Al-Hadeethi, O. Benali, T. Guedira, H-s. Lee, S. Kaya, S. M. Ibrahim
Summary: In this study, a new hydrazone compound called HTH was used to protect carbon steel from corrosion in 1.0 mol/L HCl. Different techniques were used to investigate the corrosion inhibition, including SEM/EDX. Electrochemical data showed that the inhibitor was most effective at a concentration of 10-3 mol/L. Potentiodynamic polarization measurements indicated that hydrazone acted as a mixed-type inhibitor. EIS results showed increased polarization resistance and decreased Ceff,dl values. SEM/EDX analysis confirmed the formation of a protective layer on the metal surface. Quantum chemical calculations and DFT simulations supported the experimental conclusions.
ARABIAN JOURNAL OF CHEMISTRY
(2023)
Article
Chemistry, Organic
Youssef Merroun, Soukaina Chehab, Achraf El Hallaoui, Taoufiq Guedira, Said Boukhris, Rachida Ghailane, Abdelaziz Souizi
Summary: This study introduces a mono-ammonium phosphate-based heterogeneous catalyst with simplicity, reusability, and recoverability, well-suited for multicomponent reactions. The catalyst was thoroughly characterized using FT-IR, XRD, SEM, and EDX. Employing this catalyst in a one-pot multicomponent approach enables efficient synthesis of xanthene derivatives. The results demonstrate the impressive performance and stability of SnP2O7 as a heterogeneous catalyst, with yields ranging from good to excellent and no significant decrease after five cycles.
POLYCYCLIC AROMATIC COMPOUNDS
(2023)
Proceedings Paper
Materials Science, Multidisciplinary
A. Touite, S. Labied, T. El Ghailassi, T. Guedira
Summary: This study aims to examine new techniques for handling and managing radioactive organic oil wastes, with a focus on the solidification/stabilization of liquid oil waste using cement-based mortar and alumina powder to improve the mechanical properties of the composites.
MATERIALS TODAY-PROCEEDINGS
(2022)
Proceedings Paper
Materials Science, Multidisciplinary
A. Touite, S. Labied, T. El Ghailassi, O. Benali, T. Guedira
Summary: This study aims to investigate the physicochemical and mechanical properties of red clay reinforced mortar. Various tests were conducted to analyze the behavior of red clay and cement mixtures. The results showed that the addition of red clay significantly improved the compressive strength of the mortar and enhanced its ability to contain radionuclides.
MATERIALS TODAY-PROCEEDINGS
(2022)
Article
Materials Science, Multidisciplinary
A. Elbadaoui, M. Galai, S. Ferraa, H. Barebita, M. Cherkaoui, T. Guedira
Summary: The influence of different compositions on the corrosion of mild steel in 1 M HCl was studied. It was found that a higher B2O3 content led to better inhibition effect. In addition, addition of the inhibitor could decrease the charge transfer resistance of the corrosion process. The inhibition efficiency decreased with increasing temperature. The study also revealed that the inhibition efficiencies depended on the B2O3, V2O5, and Nb2O5 content in the system.
INTERNATIONAL JOURNAL OF CORROSION AND SCALE INHIBITION
(2022)
