Article
Chemistry, Multidisciplinary
Junchao Huang, Yi Zhong, Pingdong Wei, Jie Cai
Summary: The rapid dissolution and hierarchical self-assembly of beta-chitin in aqueous KOH/urea solution were studied, revealing its hierarchically corrugated board structure and the formation of nanofibrous network structure during neutralization. The interactions between chitin chains and solvent molecules were found to promote dissolution efficiency, leading to total dissolution without derivatization. This process ultimately resulted in the formation of temperature-sensitive solutions and even gels of crystalline alpha-chitin at higher chitin concentrations.
Article
Biochemistry & Molecular Biology
Monica-Cornelia Sardaru, Irina Rosca, Simona Morariu, Elena-Laura Ursu, Razvan Ghiarasim, Alexandru Rotaru
Summary: A facile method for preparing beta-cyclodextrin-functionalized hydrogels based on guanosine quartet assembly was discussed. The ratio of beta-cyclodextrin and guanosine components significantly influenced the internal structuration and mechanical properties of the hydrogels. The hydrogels showed potential for specific applications in biomedical and pharmaceutical fields, with self-healing and thixotropic properties and selective antimicrobial activity against S. aureus.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2021)
Article
Chemistry, Physical
Juan Zhang, Cuiting Liu, Xinyue Hu, Qichao Lv, Hongsheng Zhang, Benxiang Pi, Zihao Yang, Meiqin Lin
Summary: By studying the self-assembly of PFNA/gamma-CD in aqueous solution, a novel cyclodextrin-based hydrogel with crystal-like structure was obtained by adding gamma-CD, which was uniform in morphology and sensitive to shear, showing reversible transition between hydrogel and solution with different forms under shear rates.
Article
Chemistry, Physical
Sebastien Noel, Eleonora Caronia, Herve Bricout, Iveta Chena Ticha, Stephane Menuel, Anne Ponchel, Sebastien Tilloy, Alessandro Galia, Eric Monflier, Jindrich Jindrich, Bastien Leger
Summary: Utilizing cinchonidine-functionalized beta-cyclodextrin as a stabilizing agent and chiral modifier, the preparation of platinum nanoparticles exhibited enhanced stability, catalytic activity, and enantioselectivity in the asymmetric hydrogenation of ethyl pyruvate. NMR and MALDI-MS analyses revealed the reduction of the cinchonidine graft during nanoparticle preparation.
CATALYSIS COMMUNICATIONS
(2021)
Article
Chemistry, Physical
Siyu Li, Joeri Opdam, Leendert G. J. van der Ven, Remco Tuinier, A. Catarina C. Esteves
Summary: This study compares the self-assembly of supracolloidal particles prepared with PEO-surfactant stabilized (Triton X-405) and/or PEO-grafted polymer particles. The results show that PEO-based surfactant can act as an assembly promoter of core-corona hybrid supracolloids by establishing hydrophobic interactions. The concentration of the PEO surfactant and the distribution of PEO chains on different interfaces crucially affect the assembly of supracolloids.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Article
Materials Science, Multidisciplinary
Dan Zhao, Rui Liu, Cheng Luo, Yang Guo, Chengyi Hou, Qinghong Zhang, Yaogang Li, Wei Jia, Hongzhi Wang
Summary: The study focuses on the in-situ assembly of carbon nanotubes (CNTs) using macroscopic dielectrophoresis, overcoming the limitation of small size in traditional manipulation methods. Through optimizing voltage and frequency, ordered CNTs chains can be obtained under the action of alternating current dielectrophoresis, which can restore immediately upon powering up after being damaged. Different conductive patterns on non-woven fabric can be achieved by controlling the position of the electrodes in a wet environment.
ADVANCED FIBER MATERIALS
(2021)
Article
Polymer Science
Xiangbin Sun, Peng Cao, Xue Bai, Yufeng He, Pengfei Song, Rongmin Wang
Summary: In this study, a series of double-armed antibacterial polymers (CD-QPS) were successfully synthesized via Steglich esterification and reversible addition-fragmentation chain transfer polymerization (RAFT). These polymers exhibited exceptional antibacterial activity against Escherichia coli and Staphylococcus aureus, with bacteriostatic rates reaching 100% and 99.9%, respectively. CD-QPS also demonstrated long-term antibacterial effects in preservation tests and showed good biocompatibility in cytotoxicity tests.
Article
Chemistry, Applied
Roberto Aguado, Dina Murtinho, Artur J. M. Valente
Summary: The study demonstrates the long-lasting protection of antioxidant and antimicrobial compounds loaded on polysaccharide substrates, effectively preserved by cyclodextrin moieties, to confer specific properties to fabrics, paper and other materials. The insertion of beta-cyclodextrin units enhances the long-term retention of phenolic active compounds in carbohydrate matrices, with a higher percentage of compound retained when using certain substrates. The release rate of these compounds over time can be measured and fitted to kinetic models to predict their behavior in aqueous ethanol.
CARBOHYDRATE POLYMERS
(2021)
Article
Pharmacology & Pharmacy
Isabel Asela, Orlando Donoso-Gonzalez, Nicolas Yutronic, Rodrigo Sierpe
Summary: A new nanomaterial based on beta-cyclodextrin-based nanosponges and gold nanoparticles was developed, successfully loading two therapeutic agents - phenylethylamine and 2-amino-4-(4-chlorophenyl)-thiazole, while stabilizing AuNPs. These materials have high loading capacities and potential applications in the transport of therapeutic agents.
Article
Biochemistry & Molecular Biology
Kulpavee Jitapunkul, Pisanu Toochinda, Luckhana Lawtrakul
Summary: Stable encapsulation of medically active compounds can lead to longer storage life and facilitate the slow-release mechanism. HPBCD is identified as the best encapsulation agent for plumbagin, forming a stable host-guest complex with promising longer storage life and slow-release potential.
Article
Biochemistry & Molecular Biology
Cuicui Ding, Mengdie Tian, Yue Wang, Kuan Cheng, Yifan Yi, Min Zhang
Summary: This study investigates the intrinsic regulating mechanism of beta-cyclodextrin (beta-CD) on collagen self-assembly. It is found that beta-CD has a bilateral regulation on collagen self-aggregation, depending on its content. The lateral arrangement of collagen molecules to form a 1/4 staggered structure is not disturbed by beta-CD. The degree of aggregation of collagen self-assembled fibrils is closely correlated with the addition of beta-CD content.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2023)
Article
Materials Science, Multidisciplinary
Hui-Juan Wang, Heng-Yi Zhang, Cong Zhang, Bing Zhang, Xianyin Dai, Xiufang Xu, Yu Liu
Summary: Constructing hypoxia fluorescence probes is an important research field. In this study, a noncovalent hypoxia-responsive turn-on fluorescence probe was reported for hypoxia cell imaging.
ACS APPLIED POLYMER MATERIALS
(2022)
Article
Engineering, Environmental
Nan Li, Li Yang, Dong Wang, Chuyang Tang, Weiqiao Deng, Zhining Wang
Summary: Researchers have developed a new material, GDC, for efficient and selective uranium extraction from seawater, offering advantages such as rapid equilibrium, high adsorption capacity, excellent selectivity, and good mechanical integrity. The material can be easily regenerated and maintains a high reusability rate after multiple adsorption-desorption cycles, showing great potential for practical applications.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2021)
Article
Engineering, Biomedical
Line Aanerud Omtvedt, Kare Andre Kristiansen, Wenche Iren Strand, Finn Lillelund Aachmann, Berit Lokensgard Strand, Daria Sergeevna Zaytseva-Zotova
Summary: The study developed a hydrogel drug delivery system using natural polysaccharide alginate functionalized with beta-cyclodextrins for local paclitaxel delivery, showing potential as a material for drug delivery systems.
JOURNAL OF BIOMEDICAL MATERIALS RESEARCH PART A
(2021)
Article
Chemistry, Multidisciplinary
Bin Liu, Serge Ravaine, Etienne Duguet
Summary: We report a solvent-induced assembly method for synthesizing one-patch silica nanoparticles. By controlling multiple stages in the synthesis process, highly pure nanoparticles with a fine control of the patch-to-particle size ratio can be obtained. Self-assembly in specific solvent conditions leads to the formation of clusters and micelle structures with different sizes. The research provides an effective method for preparing nanostructures.
Article
Chemistry, Physical
Mohamed Aouay, Albert Magnin, Jean-Luc Putaux, Sami Boufi
Summary: Emulsion polymerization using dextrins as the sole stabilizer produced stable latex dispersions with high solid content and narrow particle size distribution. The H2O2/ascorbic acid redox initiator was effective in achieving complete polymerization within 3-4 hours, resulting in dextrin-functionalized polymer latexes with particle sizes between 150 and 600 nm.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2022)
Article
Chemistry, Physical
Jean-Luc Putaux, Christine Lancelon-Pin, Luc Choisnard, Annabelle Geze, Denis Wouessidjewe
Summary: This study prepared colloidal nanoparticles through transesterification, resulting in particles with misoriented domains and a regular columnar hexagonal structure. The tilt grain boundaries in the columnar organization were analyzed using coincidence site lattice and structural units concepts.
Review
Chemistry, Multidisciplinary
Yu Ogawa, Jean-Luc Putaux
Summary: This article reviews the recent advances in electron microscopy of carbohydrate nanoparticles, with particular emphasis on understanding the three-dimensional shape and structural heterogeneity using low-dose electron tomography and electron diffraction techniques coupled with cryogenic transmission electron microscopy.
FRONTIERS IN CHEMISTRY
(2022)
Article
Chemistry, Applied
Khadija Trigui, Albert Magnin, Jean-Luc Putaux, Sami Boufi
Summary: Twin-screw extrusion (TSE) is an effective method for preparing high-solid-content nanocellulose gels. This study investigates the disintegration mechanism of cellulose fibers and the role of fiber pretreatment. The results show that combining TSE with rotor-stator dispersion or short sonication homogenization can enhance the fibrillation during extrusion, leading to a higher fraction of nanocellulose.
CARBOHYDRATE POLYMERS
(2022)
Article
Polymer Science
Karim Mazeau, Yoshiharu Nishiyama, Yu Ogawa, Luc Choisnard, Denis Wouessidjewe, Jean-Luc Putaux, Cong Anh Khanh Le
Summary: Chain-folded lamellar V-amylose single crystals were prepared by adding butan-1-ol to hot dilute aqueous solutions of native amylose. A molecular model was proposed based on thorough search of helix position and restrained structure refinement against diffraction data.
Article
Chemistry, Multidisciplinary
Taiki Nishimura, Satoshi Katsuhara, Chaehun Lee, Brian J. Ree, Redouane Borsali, Takuya Yamamoto, Kenji Tajima, Toshifumi Satoh, Takuya Isono
Summary: This study introduces a novel block copolymer system by utilizing carbohydrates and inorganic hybrids, synthesized through click reactions. The block copolymers demonstrated various microphase-separated structures in both bulk and thin film states, with potential for nanopatterning applications after reactive ion etching.
Article
Biochemistry & Molecular Biology
Emna Ben Ayed, Nouha Ghorbel, Ali Kallel, Jean-Luc Putaux, Sami Boufi
Summary: In this research, stable colloidal dispersions of highly dispersible hybrid nanoparticles of polyaniline (PANI) and chitin nanocrystals (ChNCs) were prepared through a one-step polymerization process. The PANI-g-ChNCs were mixed with a waterborne poly(vinyl acetate) latex dispersion to form nanocomposite films with conductivity and reinforcement effects. Conductive waterborne adhesives for wood were also prepared using this hybrid nanofiller.
Article
Chemistry, Multidisciplinary
Cong Anh Khanh Le, Yu Ogawa, Florent Grimaud, Yoshiharu Nishiyama, Isabelle Morfin, Gabrielle Potocki-Veronese, Luc Choisnard, Denis Wouessidjewe, Jean-Luc Putaux
Summary: This study describes the crystal structures of starch-small molecule inclusion complexes formed by crystallizing starch in the presence of aromatic compounds. Three new allomorphs were identified and characterized using various techniques.
CRYSTAL GROWTH & DESIGN
(2022)
Review
Biochemistry & Molecular Biology
Yu Ogawa, Yoshiharu Nishiyama, Jean-Luc Putaux
Summary: Polysaccharides are abundant biopolymers with significant importance in biological systems and material development. However, conventional crystallography methods are not suitable for polysaccharide crystals due to their small size. Different crystallographic methods, such as small-probe single crystal diffraction, high-resolution fiber diffraction, and powder diffraction combined with molecular modeling, have provided new insights into the atomic-resolution structure of polysaccharide crystals. Challenges still exist in analyzing disorder and defects using low-resolution diffraction data and further integrating molecular modeling methods.
CURRENT OPINION IN CHEMICAL BIOLOGY
(2022)
Article
Biochemistry & Molecular Biology
Mohamed Aouay, Albert Magnin, Jean-Luc Putaux, Sami Boufi
Summary: The nucleating aptitude for poly-L-(lactic acid) (PLLA) of various biobased nanoparticles with different morphologies and surface properties was investigated in this study. The results showed that cellulose nanofibrils and cellulose nanofibrils without lignin exhibited the lowest crystallization half-time and the most effective nucleating ability. Additionally, the surface energy components of the nanofillers were found to be related to their nucleating ability. The rheological properties of different compositions, as well as the mechanical and optical properties of films with and without annealing treatment, were also studied.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2022)
Article
Materials Science, Paper & Wood
Gabriel Banvillet, Clement Grange, Denis Curtil, Jean-Luc Putaux, Gael Depres, Naceur Belgacem, Julien Bras
Summary: This study investigates the effects of various fibrillation processes on the properties of cellulose nanofibrils (CNFs), including refining, twin-screw extrusion (TSE), ultra-fine grinding, and homogenization. The results show that different processes result in different levels of fiber destructuration and nanofibril property changes. Ultra-fine grinding and homogenization have minimal effects on the mechanical and optical properties of CNFs, while TSE leads to significant decreases in crystallinity index, degree of polymerization, and mechanical properties. Furthermore, the combination of refining and ultra-fine grinding greatly enhances CNF properties, with an increase in optical transmittance.
Article
Chemistry, Multidisciplinary
Kedafi Belkhir, Orelia Cerlati, Diana Heaugwane, Alice Tosi, Belkacem Tarek Benkhaled, Pierre-Louis Brient, Camille Chatard, Alain Graillot, Sylvain Catrouillet, Stephanie Balor, Dominique Goudouneche, Bruno Payre, Pascale Laborie, Jia-Hui Lim, Jean-Luc Putaux, Patricia Vicendo, Laure Gibot, Barbara Lonetti, Anne-Francoise Mingotaud, Vincent Lapinte
Summary: Functionalized block copolymers of polyoxazolines with coumarin were synthesized and their self-assembly characteristics were investigated. Cross-linking reaction improved the stability of the resulting nano-objects.
Article
Chemistry, Multidisciplinary
Amira Najahi, Quim Tarres, Pere Mutje, Marc Delgado-Aguilar, Jean-Luc Putaux, Sami Boufi
Summary: Lignin-containing cellulose nanofibrils (LCNFs) were prepared via TEMPO-mediated oxidation and high-pressure homogenization, and the impact of carboxyl content on the properties of LCNF gel was investigated. It was found that increasing carboxyl content led to decreased lignin content, improved colloidal stability and water contact angle, as well as smaller fibril size, but slightly lower thermal stability. In addition, incorporating LCNFs into a ductile polymer matrix significantly enhanced the tensile strength.
Article
Plant Sciences
Camille Vandromme, Corentin Spriet, Jean-Luc Putaux, David Dauvillee, Adeline Courseaux, Christophe D'Hulst, Fabrice Wattebled
Summary: The control of starch granule initiation in plant leaves involves complex interactions between enzymes like Starch Synthase 4 and 3 (SS4 or SS3) and noncatalytic proteins such as Protein Involved in starch Initiation 1 (PII1). It was found that SS4 is the main enzyme responsible for starch granule initiation, but SS3 can partially compensate in its absence. The interaction between PII1 and SS4 is crucial for full activity of SS4, but Arabidopsis mutants lacking either SS4 or PII1 still accumulate starch granules. The combination of mutations in PII1 with SS3 or SS4 provides new insights into the synthesis of remaining starch granules.
Article
Polymer Science
Enrique Javier Carvajal-Barriga, Jean-Luc Putaux, Pablo Martin-Ramos, Jennifer Simbana, Patricia Portero-Barahona, Jesus Martin-Gil
Summary: Ivory nut seeds have traditionally been used in Central and South America for obtaining vegetable ivory. The residues from this industry can be utilized as a source of fatty acids and mannans. Additionally, cellulose can be recovered through acid hydrolysis and functionalization, making it advantageous due to the absence of lignin in the endospermic tissue. This nanocellulose hydrogel has potential applications in agriculture, pharmaceutics, and wastewater treatment from textile and paper industries.
