Article
Biochemistry & Molecular Biology
Denis Mihaela Panaitescu, Sergiu Stoian, Adriana Nicoleta Frone, George Mihai Vlasceanu, Dora Domnica Baciu, Augusta Raluca Gabor, Cristian Andi Nicolae, Valentin Raditoiu, Elvira Alexandrescu, Angela Casarica, Celina Damian, Paul Stanescu
Summary: In this study, oxidized sucrose was used as a crosslinker for aminated bacterial cellulose scaffolds, resulting in three-dimensional cellulose structures with good mechanical properties and high porosity, suitable for soft tissue engineering.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2022)
Article
Engineering, Biomedical
Timur Kh Tenchurin, Elena Sytina, Elena Solovieva, Aleksey Shepelev, Vissarion Mamagulashvili, Sergey Krasheninnikov, Evgeniy Yastremskiy, Elizaveta Nesterenko, Aleksandr Buzin, Elena Istranova, Leonid Istranov, Timur Kh Fatkhudinov, Andrey Panteleyev, Sergey Chvalun
Summary: This study developed 3D polymeric scaffolds with active biological properties using electrospinning technique. The results showed that collagen NWM exhibited better biocompatibility but had a higher tendency to induce calcification compared to gelatin NWM.
JOURNAL OF BIOMEDICAL MATERIALS RESEARCH PART A
(2023)
Article
Polymer Science
Monika Biernat, Anna Wozniak, Milena Chraniuk, Miroslawa Panasiuk, Paulina Tymowicz-Grzyb, Joanna Pagacz, Agnieszka Antosik, Lidia Ciolek, Beata Gromadzka, Zbigniew Jaegermann
Summary: Chitosan, a commonly used natural polymer for biomedical applications, needs to be crosslinked or stabilized to obtain stable chitosan biomaterials with appropriate strength properties. In this study, chitosan/bioglass composites were prepared using the lyophilization method, and six different crosslinking methods were compared. The results showed that all the selected methods produced stable and non-cytotoxic porous chitosan/bioglass composites. The composite with genipin exhibited the best biological and mechanical characteristics, while the composite stabilized with ethanol showed distinct thermal properties and swelling stability, as well as promoting cell proliferation. The composite stabilized by thermal dehydration had the highest specific surface area.
Article
Materials Science, Textiles
Shengyu Zhu, Jiliu Pei, Yukang Song, Yu Liu, Feng Xue, Xiaohui Xiong, Chen Li
Summary: Cross-linking of chitosan film using riboflavin-induced UV light improves its physicochemical properties, enhancing water vapor resistance, tensile strength, optical property, and thermal stability. Scanning electron microscope images reveal a tighter and more uniform film structure after cross-linking.
FIBERS AND POLYMERS
(2022)
Article
Chemistry, Physical
Jonathan Miras, Chao Liu, Eva Blomberg, Esben Thormann, Susana Vilchez, Jordi Esquena
Summary: Crosslinked chitosan-based nanofilms prepared with the nontoxic reagent genipin showed pH-responsive behavior, swelling at pH 3 and shrinking at pH 6, with reversible changes between these two pH values. The wettability of the nanofilms decreased with increased crosslinking. Quartz crystal microbalance with dissipation (QCM-D) and atomic force microscopy (AFM) were used to study the swelling capacity and elastic properties of the nanofilms, showing irreversible changes at pH 9. AFM results also demonstrated an increase in elastic modulus from approximately 500 MPa at pH 3 to around 700 MPa at pH 6.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2021)
Article
Biochemical Research Methods
Xinyue Zhao, Jian Tang, Yanhua Liu, Bing Hu, Quan Chen, Yonggang Liu
Summary: Crosslinking of chitosan chains with genipin leads to the formation of biocompatible nanogels. The reaction is first-order and size-dependent. The crosslinking reaction results in an increase in the hydrodynamic radius and weight average molar mass of the chitosan chains. The reaction also leads to the formation of branched chains/nanogels with a wide range of molar masses but similar sizes, and the largest nanogels show a scaling relation with a hard sphere particle structure. The reaction is accompanied by a reduction of charge density and an increase in hydrophobicity, which plays a key role in the formation of uniform size nanogels.
JOURNAL OF CHROMATOGRAPHY A
(2023)
Article
Biochemistry & Molecular Biology
Tyler R. Priddy-Arrington, Reagan E. Edwards, Claire E. Colley, Marissa M. Nguyen, Tess Hamilton-Adaire, Mary E. Caldorera-Moore
Summary: Recently, there has been a growing interest in injectable, in situ crosslinking hydrogels that can conform to their environment with minimal invasion. Current in situ crosslinking chitosan hydrogels either lack biocompatibility and degrade slowly due to toxic crosslinking agents, or are mechanically weak and degrade rapidly due to insufficient crosslinking. In this study, the authors developed a thermally-driven, injectable chitosan-genipin hydrogel that can be crosslinked at 37 degrees C, which demonstrates mechanical strength, biodegradability, and high biocompatibility. The natural crosslinker used is genipin, which is non-toxic and activated by temperature. The characteristics of the chitosan-genipin hydrogel, such as crosslinking kinetics, injectability, viscoelasticity, swelling and pH response, and biocompatibility with keratinocyte cells, were analyzed. The results showed that the hydrogel can be successfully crosslinked at 37 degrees C, and it remains mechanically stable while being biodegradable. Long-term cell viability tests demonstrated excellent biocompatibility of the chitosan-genipin hydrogel, even during the crosslinking phase. Overall, these findings support the development of an injectable, in situ crosslinking chitosan-genipin hydrogel for minimally invasive biomedical applications.
MACROMOLECULAR BIOSCIENCE
(2023)
Article
Engineering, Environmental
Izabela Kondratowicz, Ibrahim Shalayel, Malgorzata Nadolska, Seiya Tsujimura, Yoshifumi Yamagata, Isao Shitanda, Abdelkader Zebda
Summary: Chitosan, a linear polysaccharide, is of great interest for biomedical applications. It is important to study the effect of additives on the properties of chitosan, and various material combinations can help enhance its performance.
JOURNAL OF POLYMERS AND THE ENVIRONMENT
(2023)
Article
Chemistry, Applied
Jiawei Lin, Zhiming Wang, Hecheng Meng, Xiaoming Guo
Summary: This study improved the emulsification properties of gum arabic by crosslinking it with genipin, resulting in enhanced emulsifying stability and decreased dosage of emulsifier. The genipin-crosslinked gum arabic showed larger molecular weight and more compact conformation, leading to more stable emulsions even after sterilization or prolonged storage at elevated temperatures.
CARBOHYDRATE POLYMERS
(2021)
Article
Biochemistry & Molecular Biology
Yike Jiang, Wen Wang, Qingrong Huang
Summary: Polysaccharide-polypeptide nanocomplexes are effective stabilizers for Pickering emulsions, but are prone to instability with changes in pH and ionic strength. To overcome this issue, the CS-CPPs nanocomplexes were crosslinked using genipin, resulting in GCNs that improved the stability of Pickering emulsions. The physical properties of GCNs and the resulting GPEs were influenced by the genipin concentration, crosslinking temperature, and duration. GPEs prepared with lower temperature and shorter duration of crosslinking exhibited stronger gel-like characteristics and higher stability in terms of pH and ionic strength.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2023)
Article
Biochemistry & Molecular Biology
Xinglu Zhou, Anlin Yin, Junlu Sheng, Jiayan Wang, Huifen Chen, Yun Fang, Kuihua Zhang
Summary: The study synthesized nano Cu2O/CS nanofibrous scaffolds through chelation and reduction steps, successfully depositing Cu2O NPs on CS nanofibrous scaffolds. The nanofibrous scaffolds exhibited excellent antibacterial activity and good biocompatibility, showing broad application prospects in the field of antibacterial biomaterials.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2021)
Article
Polymer Science
Jun Zeng, Youcheng Gao, Siming Zhu, Hongyuan He, Ming Yu
Summary: In this study, chitosan-soy protein isolate crosslinked films were prepared using genipin as a crosslinking agent. The crosslinking reaction with high contents of genipin changed the rheological properties of the film matrixes. It was found that the crosslinking reaction decreased the crystallinity degree and enhanced the surface roughness of the films, resulting in improved light barrier capacity but reduced tensile strength and thermal stability.
JOURNAL OF APPLIED POLYMER SCIENCE
(2023)
Article
Food Science & Technology
Felicity A. Whitehead, Stefan Kasapis
Summary: Crosslinked biopolymers were prepared to investigate the controlled release and diffusion of ascorbic acid in neutral and acidic pH conditions. Mathematical modelling was used to predict the network properties and determine the best-fit model for ascorbic acid release.
Article
Engineering, Biomedical
Kuan Yong Ching, Orestis Andriotis, Bram Sengers, Martin Stolz
Summary: The study focuses on scaffold-based tissue engineering approaches using electrospinning to produce chitosan-based scaffolds with excellent support for chondrocyte differentiation and extracellular matrix reconstruction. By optimizing the scaffold stiffness and crosslinking, scaffolds mimicking the characteristics of human articular cartilage can be obtained.
JOURNAL OF BIOMATERIALS APPLICATIONS
(2021)
Article
Chemistry, Applied
Maria C. Bezerra, Gustavo A. Duarte, Segun Talabi, Alessandra A. Lucas
Summary: This study investigates the use of thermomechanical processing to increase chitosan production, with a focus on the role of citric acid as a destructuring and crosslinking agent. The results demonstrate that thermomechanical processing of chitosan with citric acid yields robust fibers with superior mechanical strength, which is a unique microstructure in chitosan-based materials.
CARBOHYDRATE POLYMERS
(2022)
Article
Nanoscience & Nanotechnology
Lijun Yang, Jingchuan Wang, Wallace Woon-Fong Leung
ACS APPLIED MATERIALS & INTERFACES
(2015)
Article
Chemistry, Physical
Carina Chun Pei, Wallace Woon-Fong Leung
APPLIED CATALYSIS B-ENVIRONMENTAL
(2015)
Article
Chemistry, Physical
Annie Ng, Zhiwei Ren, Qian Shen, Sin Hang Cheung, Huseyin Cem Gokkaya, Gongxun Bai, Jingchuan Wang, Lijun Yang, Shu Kong So, Aleksandra B. Djurisic, Wallace Woon-fong Leung, Jianhua Hao, Wai Kin Chan, Charles Surya
JOURNAL OF MATERIALS CHEMISTRY A
(2015)
Article
Engineering, Chemical
Wallace Woon-Fong Leung, Curie Wing-Yi Hau
SEPARATION AND PURIFICATION TECHNOLOGY
(2016)
Article
Engineering, Chemical
Curie Wing-Yi Hau, Wallace Woon-Fong Leung
SEPARATION AND PURIFICATION TECHNOLOGY
(2016)
Article
Engineering, Chemical
Wallace Woon-Fong Leung
SEPARATION AND PURIFICATION TECHNOLOGY
(2016)
Article
Chemistry, Analytical
Yong Ren, Wallace Woon Fong Leung
Article
Engineering, Chemical
Carina Chun Pei, Kenneth Kin Shing Lo, Wallace Woon-Fong Leung
SEPARATION AND PURIFICATION TECHNOLOGY
(2017)
Article
Chemistry, Multidisciplinary
Yun Li, Wallace Woon-Fong Leung
Article
Thermodynamics
Wallace Woon-Fong Leung, Yong Ren
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2014)
Article
Biotechnology & Applied Microbiology
Carina Chun Pei, Wallace Woon-Fong Leung
JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY
(2014)
Editorial Material
Thermodynamics
Wallace Leung, Yong Ren
JOURNAL OF HEAT TRANSFER-TRANSACTIONS OF THE ASME
(2014)
Article
Energy & Fuels
Kin Shing Kenneth Lo, Wallace Woon Fong Leung