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Xu X, Sarhan RM, Mei S, Kochovski Z, Koopman W, Priestley RD, Lu Y. Photothermally Triggered Nanoreactors with a Tunable Catalyst Location and Catalytic Activity. ACS APPLIED MATERIALS & INTERFACES 2023; 15:48623-48631. [PMID: 37807243 DOI: 10.1021/acsami.3c09657] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/10/2023]
Abstract
Thermosensitive microgels based on poly(N-isopropylacrylamide) (PNIPAm) have been widely used to create nanoreactors with controlled catalytic activity through the immobilization of metal nanoparticles (NPs). However, traditional approaches with metal NPs located only in the polymer network rely on electric heating to initiate the reaction. In this study, we developed a photothermal-responsive yolk-shell nanoreactor with a tunable location of metal NPs. The catalytic performance of these nanoreactors can be controlled by both light irradiation and conventional heating, that is, electric heating. Interestingly, the location of the catalysts had a significant impact on the reduction kinetics of the nanoreactors; catalysts in the shell exhibited higher catalytic activity compared with those in the core, under conventional heating. When subjected to light irradiation, nanoreactors with catalysts loaded in the core demonstrated improved catalytic performance compared to direct heating, while nanoreactors with catalysts in the shell exhibited relatively similar activity. We attribute this enhancement in catalytic activity to the spatial distribution of the catalysts and the localized heating within the polydopamine cores of the nanoreactors. This research presents exciting prospects for the design of innovative smart nanoreactors and efficient photothermal-assisted catalysis.
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Affiliation(s)
- Xiaohui Xu
- Institutue of Soft Matter and Functional Materials, Helmholtz-Zentrum Berlin fur Materialien und Energie, Hahn-Meitner-Platz 1, Berlin 14109, Germany
- Department of Chemical and Biological Engineering, Princeton University, Princeton, New Jersey 08544, United States
| | - Radwan M Sarhan
- Institutue of Soft Matter and Functional Materials, Helmholtz-Zentrum Berlin fur Materialien und Energie, Hahn-Meitner-Platz 1, Berlin 14109, Germany
| | - Shilin Mei
- Institutue of Soft Matter and Functional Materials, Helmholtz-Zentrum Berlin fur Materialien und Energie, Hahn-Meitner-Platz 1, Berlin 14109, Germany
| | - Zdravko Kochovski
- Institutue of Soft Matter and Functional Materials, Helmholtz-Zentrum Berlin fur Materialien und Energie, Hahn-Meitner-Platz 1, Berlin 14109, Germany
| | - Wouter Koopman
- Institute of Physics and Astronomy, University of Potsdam, Potsdam 14467, Germany
| | - Rodney D Priestley
- Department of Chemical and Biological Engineering, Princeton University, Princeton, New Jersey 08544, United States
| | - Yan Lu
- Institutue of Soft Matter and Functional Materials, Helmholtz-Zentrum Berlin fur Materialien und Energie, Hahn-Meitner-Platz 1, Berlin 14109, Germany
- Institute of Chemistry, University of Potsdam, Potsdam 14467, Germany
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Tialiou A, Athab ZH, Woodward RT, Biegler V, Keppler BK, Halbus AF, Reithofer MR, Chin JM. Fabrication of graded porous structure of hydroxypropyl cellulose hydrogels via temperature-induced phase separation. Carbohydr Polym 2023; 315:120984. [PMID: 37230621 DOI: 10.1016/j.carbpol.2023.120984] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2022] [Revised: 04/14/2023] [Accepted: 05/02/2023] [Indexed: 05/27/2023]
Abstract
A novel hydroxypropyl cellulose (gHPC) hydrogel with graded porosity has been fabricated, in which pore size, shape, and mechanical properties vary across the material. The graded porosity was achieved by cross-linking different parts of the hydrogel at temperatures below and above 42 °C, which was found to be the temperature of turbidity onset (lower critical solution temperature, LCST) for the HPC and divinylsulfone cross-linker mixture. Scanning electron microscopy imaging revealed a decreasing pore size along the cross-section of the HPC hydrogel from the top to the bottom layer. HPC hydrogels demonstrate graded mechanical properties whereby the top layer, Zone 1, cross-linked below LCST, can be compressed by about 50% before fracture, whereas the middle and bottom layers (Zone 2 and 3, respectively) cross-linked at 42 °C, can withstand 80% compression before failure. This work demonstrates a straightforward, yet novel, concept of exploiting a graded stimulus to incorporate a graded functionality into porous materials that can withstand mechanical stress and minor elastic deformations.
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Affiliation(s)
- Alexia Tialiou
- University of Vienna, Faculty of Chemistry, Institute of Inorganic Chemistry, Währinger Str. 42, 1090 Vienna, Austria; University of Vienna, Vienna Doctoral School in Chemistry (DoSChem), Währinger Str. 42, 1090 Vienna, Austria
| | - Zahraa H Athab
- University of Babylon, College of Science, Department of Chemistry, Hilla, Iraq; University of Babylon, College of Science, Environmental Research and Studies Center, Hilla, Iraq
| | - Robert T Woodward
- University of Vienna, Faculty of Chemistry, Institute of Materials Chemistry and Research, Währinger Str. 42, 1090 Vienna, Austria
| | - Veronika Biegler
- University of Vienna, Faculty of Chemistry, Institute of Materials Chemistry and Research, Währinger Str. 42, 1090 Vienna, Austria
| | - Bernhard K Keppler
- University of Vienna, Faculty of Chemistry, Institute of Inorganic Chemistry, Währinger Str. 42, 1090 Vienna, Austria; University of Vienna and Medical University of Vienna, Research Cluster "Translational Cancer Therapy Research", Währinger Str. 42, 1090 Vienna, Austria
| | - Ahmed F Halbus
- University of Babylon, College of Science, Department of Chemistry, Hilla, Iraq
| | - Michael R Reithofer
- University of Vienna, Faculty of Chemistry, Institute of Inorganic Chemistry, Währinger Str. 42, 1090 Vienna, Austria.
| | - Jia Min Chin
- University of Vienna, Faculty of Chemistry, Institute of Inorganic Chemistry-Functional Materials, Währinger Str. 42, 1090 Vienna, Austria.
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Yang Y, Sha L, Zhao H, Guo Z, Wu M, Lu P. Recent advances in cellulose microgels: Preparations and functionalized applications. Adv Colloid Interface Sci 2023; 311:102815. [PMID: 36427465 DOI: 10.1016/j.cis.2022.102815] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2022] [Revised: 11/02/2022] [Accepted: 11/15/2022] [Indexed: 11/20/2022]
Abstract
Microgels are soft, deformable, permeable, and stimuli-responsive microscopic polymeric particles that are now emerging as prospective multifunctional soft materials for delivery systems, interface stabilization, cell cultures and tissue engineering. Cellulose microgels are emerging biopolymeric microgels with unique characteristics such as abound hydroxyl structure, admirable designability, multiscale pore network and excellent biocompatibility. This review summarizes the fabrication strategies for microgel, then highlights the fabrication routes for cellulose microgels, and finally elaborates cellulose microgels' bright application prospects with unique characteristics in the fields of controlled release, interface stabilization, coating, purification, nutrition/drug delivery, and bio-fabrication. The challenges to be addressed for further applications and considerable scope for development in future of cellulose microgels are also discussed.
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Affiliation(s)
- Yang Yang
- College of Light Industry and Food Engineering, Guangxi Key Laboratory of Clean Pulp and Papermaking and Pollution Control, Guangxi University, Nanning, Guangxi 530004, China
| | - Lishan Sha
- College of Light Industry and Food Engineering, Guangxi Key Laboratory of Clean Pulp and Papermaking and Pollution Control, Guangxi University, Nanning, Guangxi 530004, China
| | - Han Zhao
- College of Light Industry and Food Engineering, Guangxi Key Laboratory of Clean Pulp and Papermaking and Pollution Control, Guangxi University, Nanning, Guangxi 530004, China
| | - Zhaojun Guo
- College of Light Industry and Food Engineering, Guangxi Key Laboratory of Clean Pulp and Papermaking and Pollution Control, Guangxi University, Nanning, Guangxi 530004, China
| | - Min Wu
- College of Light Industry and Food Engineering, Guangxi Key Laboratory of Clean Pulp and Papermaking and Pollution Control, Guangxi University, Nanning, Guangxi 530004, China
| | - Peng Lu
- College of Light Industry and Food Engineering, Guangxi Key Laboratory of Clean Pulp and Papermaking and Pollution Control, Guangxi University, Nanning, Guangxi 530004, China.
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Nanogel fabricated from oxidized sodium alginate and hydrophilic-modified chitosan exhibits great potential as pH-responsive drug delivery system. JOURNAL OF THE IRANIAN CHEMICAL SOCIETY 2022. [DOI: 10.1007/s13738-022-02727-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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Thermodynamics of aggregation and modulation of Rheo-Thermal properties of hydroxypropyl cellulose by imidazolium ionic liquids. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2022.119314] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Sutehall S, Muniz-Pardos B, Bosch A, Pitsiladis Y. The Effect of Sodium Alginate and Pectin Added to a Carbohydrate Beverage on Endurance Performance, Substrate Oxidation and Blood Glucose Concentration: A Systematic Review and Meta-analysis. SPORTS MEDICINE - OPEN 2022; 8:82. [PMID: 35727377 PMCID: PMC9213602 DOI: 10.1186/s40798-022-00472-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/09/2021] [Accepted: 06/06/2022] [Indexed: 06/15/2023]
Abstract
INTRODUCTION Scientific and public interest in the potential ergogenic effects of sodium alginate added to a carbohydrate (CHO) beverage has increased in the last ~ 5 years. Despite an extensive use of this technology by elite athletes and recent research into the potential effects, there has been no meta-analysis to objectively elucidate the effects of adding sodium alginate to a CHO beverage on parameters relevant to exercise performance and to highlight gaps in the literature. METHODS Three literature databases were systematically searched for studies investigating the effects of sodium alginate added to CHO beverage during prolonged, endurance exercise in healthy athletes. For the systematic review, the PROSPERO guidelines were followed, and risk assessment was made using the Cochrane collaboration's tool for assessing the risk of bias. Additionally, a random-effects meta-analysis model was used to determine the standardised mean difference between a CHO beverage containing sodium alginate and an isocaloric control for performance, whole-body CHO oxidation and blood glucose concentration. RESULTS Ten studies were reviewed systematically, of which seven were included within the meta-analysis. For each variable, there was homogeneity between studies for performance (n = 5 studies; I2 = 0%), CHO oxidation (n = 7 studies; I2 = 0%) and blood glucose concentration (n = 7 studies; I2 = 0%). When compared with an isocaloric control, the meta-analysis demonstrated that there is no difference in performance (Z = 0.54, p = 0.59), CHO oxidation (Z = 0.34, p = 0.71) and blood glucose concentration (Z = 0.44, p = 0.66) when ingesting a CHO beverage containing sodium alginate. The systematic review revealed that several of the included studies did not use sufficient exercise intensity to elicit significant gastrointestinal disturbances or demonstrate any ergogenic benefit of CHO ingestion. Risk of bias was generally low across the included studies. CONCLUSIONS This systematic review and meta-analysis demonstrate that the current literature indicates no benefit of adding sodium alginate to a CHO beverage during exercise. Further research is required, however, before firm conclusions are drawn considering the range of exercise intensities, feeding rates and the apparent lack of benefit of CHO reported in the current literature investigating sodium alginate.
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Affiliation(s)
- Shaun Sutehall
- Division of Physiological Sciences, Department of Human Biology, University of Cape Town, Cape Town, South Africa
| | - Borja Muniz-Pardos
- GENUD (Growth, Exercise, Nutrition and Development) Research Group, University of Zaragoza, Zaragoza, Spain
| | - Andrew Bosch
- Division of Physiological Sciences, Department of Human Biology, University of Cape Town, Cape Town, South Africa
| | - Yannis Pitsiladis
- School of Sport and Health Sciences, University of Brighton, Welkin House, 30 Carlisle Road, Eastbourne, BN20 7SN, UK.
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Luo M, Zhang X, Wu J, Zhao J. Modifications of polysaccharide-based biomaterials under structure-property relationship for biomedical applications. Carbohydr Polym 2021; 266:118097. [PMID: 34044964 DOI: 10.1016/j.carbpol.2021.118097] [Citation(s) in RCA: 59] [Impact Index Per Article: 19.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2021] [Revised: 04/13/2021] [Accepted: 04/17/2021] [Indexed: 12/20/2022]
Abstract
Polysaccharides are well accepted biomaterials that have attracted considerable attention. Compared with other materials under research, polysaccharides show unique advantages: they are available in nature and are normally easily acquired, those acquired from nature show favorable immunogenicity, and are biodegradable and bioavailable. The bioactivity and possible applications are based on their chemical structure; however, naturally acquired polysaccharides sometimes have unwanted flaws that limit further applications. For this reason, carefully summarizing the possible modifications of polysaccharides to improve them is crucial. Structural modifications can not only provide polysaccharides with additional functional groups but also change their physicochemical properties. This review based on the structure-property relation summarizes the common chemical modifications of polysaccharides, the related bioactivity changes, possible functionalization methods, and major possible biomedical applications based on modified polysaccharides.
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Affiliation(s)
- Moucheng Luo
- School of Biomedical Engineering, Sun Yat-sen University, Shenzhen 518107, China
| | - Xinyu Zhang
- Department of Hematology, The Seventh Affiliated Hospital, Sun Yat-sen University, Shenzhen 518107, China
| | - Jun Wu
- School of Biomedical Engineering, Sun Yat-sen University, Shenzhen 518107, China.
| | - Jinmin Zhao
- Guangxi Engineering Center in Biomedical Materials for Tissue and Organ Regeneration, The First Affiliated Hospital of Guangxi Medical University, Nanning 530021, China.
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Hu J, Liu S, Deng W. Dual responsive linalool capsules with high loading ratio for excellent antioxidant and antibacterial efficiency. Colloids Surf B Biointerfaces 2020; 190:110978. [PMID: 32203910 DOI: 10.1016/j.colsurfb.2020.110978] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2020] [Revised: 03/13/2020] [Accepted: 03/14/2020] [Indexed: 02/06/2023]
Abstract
Linalool is a main component in different naturally derived essential oils, and widely used in household, personal care, food and therapeutic formulations. However, the application is limited due to its high volatility and low stability. In this study, an effective encapsulation with high loading ratio was built up together with thermal-redox dual responsiveness and controlled release properties. The emulsified linalool droplets were modified with carbon-carbon double bonds, followed by the precipitation polymerization with thermal sensitive monomer, N-vinyl caprolactam. The average size and the loading ratio of the prepared linalool capsules were 1.4 μm and 50.41 wt%. The linalool capsules exhibited thermal-redox dual responsive properties and the antioxidant-antibacterial performance. Especially, responding to the stimuli mimicking practical circumstance, the synthesized capsules presented excellent bacteria inhibiting effect. This work may open a new path for fragrance and essential oil encapsulation, enlarging them as the green biological antibacterial agents in different applications.
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Affiliation(s)
- Jing Hu
- School of Perfume and Aroma Technology, Shanghai Institute of Technology, 201418, Shanghai, PR China.
| | - Shanshan Liu
- School of Perfume and Aroma Technology, Shanghai Institute of Technology, 201418, Shanghai, PR China
| | - Weijun Deng
- School of Chemical and Environmental Engineering, Shanghai Institute of Technology, 201418, Shanghai, PR China.
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Krishnan S, Asua JM, Kothare MV. Preface to the Mohamed El-Aasser Festschrift. Ind Eng Chem Res 2019. [DOI: 10.1021/acs.iecr.9b05839] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Sitaraman Krishnan
- Department of Chemical and Biomolecular Engineering, Clarkson University, Potsdam, New York 13699, United States
| | - José M. Asua
- POLYMAT and Departamento de Química Aplicada, University of the Basque Country, Donostia-San Sebastian 20018, Spain
| | - Mayuresh V. Kothare
- Department of Chemical and Biomolecular Engineering, Lehigh University, Bethlehem, Pennsylvania 18015, United States
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