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Yu C, Han Z, Sun H, Tong J, Hu Z, Wang Y, Fang X, Yue W, Qian S, Nie G. Balancing mechanical property and swelling behavior of bacterial cellulose film by in-situ adding chitosan oligosaccharide and covalent crosslinking with γ-PGA. Int J Biol Macromol 2024; 267:131280. [PMID: 38640644 DOI: 10.1016/j.ijbiomac.2024.131280] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2023] [Revised: 03/23/2024] [Accepted: 03/29/2024] [Indexed: 04/21/2024]
Abstract
Bacterial cellulose (BC) is an ideal candidate material for drug delivery, but the disbalance between the swelling behavior and mechanical properties limits its application. In this work, covalent crosslinking of γ-polyglutamic acid (γ-PGA) with the chitosan oligosaccharide (COS) embedded in BC was designed to remove the limitation. As a result, the dosage, time, and batch of COS addition significantly affected the mechanical properties and the yield of bacterial cellulose complex film (BCCF). The addition of 2.25 % COS at the incubation time of 0.5, 1.5, and 2 d increased the Young's modulus and the yield by 5.65 and 1.42 times, respectively, but decreased the swelling behavior to 1774 %, 46 % of that of native BC. Covalent γ-PGA transformed the dendritic structure of BCCF into a spider network, decreasing the porosity and increasing the swelling behavior by 3.46 times. The strategy balanced the swelling behavior and mechanical properties through tunning hydrogen bond, electrostatic interaction, and amido bond. The modified BCCF exhibited a desired behavior of benzalkonium chlorides transport, competent for drug delivery. Thereby, the strategy will be a competent candidate to modify BC for such potential applications as wound dressing, artificial skin, scar-inhibiting patch, and so on.
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Affiliation(s)
- Chenrui Yu
- College of Biological and Food Engineering, Anhui Polytechnic University, 241000 Wuhu, China; College of Biological Science and Medical Engineering, Donghua University, 201620, Shanghai, China
| | - Zhenxing Han
- College of Biological and Food Engineering, Anhui Polytechnic University, 241000 Wuhu, China
| | - Hongxia Sun
- College of Chemistry and Materials Science, Anhui Normal University, 241002 Wuhu, China.
| | - Jie Tong
- College of Biological and Food Engineering, Anhui Polytechnic University, 241000 Wuhu, China
| | - Ziwei Hu
- College of Biological and Food Engineering, Anhui Polytechnic University, 241000 Wuhu, China
| | - Yu Wang
- College of Biological and Food Engineering, Anhui Polytechnic University, 241000 Wuhu, China
| | - Xu Fang
- State Key Laboratory of Microbial Technology, Shandong University, Qingdao, Shandong 266237, China.
| | - Wenjin Yue
- School of Chemical and Environmental Engineering, Anhui Polytechnic University, 241000 Wuhu, China.
| | - Senhe Qian
- College of Biological and Food Engineering, Anhui Polytechnic University, 241000 Wuhu, China.
| | - Guangjun Nie
- College of Biological and Food Engineering, Anhui Polytechnic University, 241000 Wuhu, China.
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Elishav O, Blumer O, Vanderlick TK, Hirshberg B. The effect of ligands on the size distribution of copper nanoclusters: Insights from molecular dynamics simulations. J Chem Phys 2024; 160:164301. [PMID: 38647299 DOI: 10.1063/5.0202432] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2024] [Accepted: 04/07/2024] [Indexed: 04/25/2024] Open
Abstract
Controlling the size distribution in the nucleation of copper particles is crucial for achieving nanocrystals with desired physical and chemical properties. However, their synthesis involves a complex system of solvents, ligands, and copper precursors with intertwining effects on the size of the nanoclusters. We combine molecular dynamics simulations and density functional theory calculations to provide insights into the nucleation mechanism in the presence of a triphenyl phosphite ligand. We identify the crucial role of the strength of the metal-phosphine interaction in inhibiting the cluster's growth. We demonstrate computationally several practical routes to fine-tune the interaction strength by modifying the side groups of the additive. Our work provides molecular insights into the complex nucleation process of protected copper nanocrystals, which can assist in controlling their size distribution and, eventually, their morphology.
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Affiliation(s)
- Oren Elishav
- Department of Chemical and Environmental Engineering, Yale University, New Haven, Connecticut 06520, USA
- School of Chemistry, Tel Aviv University, Tel Aviv 6997801, Israel
| | - Ofir Blumer
- School of Chemistry, Tel Aviv University, Tel Aviv 6997801, Israel
| | - T Kyle Vanderlick
- Department of Chemical and Environmental Engineering, Yale University, New Haven, Connecticut 06520, USA
| | - Barak Hirshberg
- School of Chemistry, Tel Aviv University, Tel Aviv 6997801, Israel
- The Center for Computational Molecular and Materials Science, Tel Aviv University, Tel Aviv 6997801, Israel
- The Ratner Center for Single Molecule Science, Tel Aviv University, Tel Aviv 6997801, Israel
- The Center for Physics and Chemistry of Living Systems, Tel Aviv University, Tel Aviv 6997801, Israel
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Zhang W, Zou L. Mismatch in Nematic Interactions Leads to Composition-Dependent Crystal Nucleation in Polymer Blends. Macromolecules 2023. [DOI: 10.1021/acs.macromol.2c02378] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/09/2023]
Affiliation(s)
- Wenlin Zhang
- Department of Chemistry, Dartmouth College, Hanover, New Hampshire 03755, United States
| | - Lingyi Zou
- Department of Chemistry, Dartmouth College, Hanover, New Hampshire 03755, United States
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Analysis of the Structure and the Thermal Conductivity of Semi-Crystalline Polyetheretherketone/Boron Nitride Sheet Composites Using All-Atom Molecular Dynamics Simulation. Polymers (Basel) 2023; 15:polym15020450. [PMID: 36679330 PMCID: PMC9862992 DOI: 10.3390/polym15020450] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2022] [Revised: 01/09/2023] [Accepted: 01/12/2023] [Indexed: 01/19/2023] Open
Abstract
Thermal transport simulations were performed to investigate the important factors affecting the thermal conductivity based on the structure of semi-crystalline polyetheretherketone (PEEK), and the addition of boron nitride (BN) sheets. The molecular-level structural analysis facilitated the prediction of the thermal conductivity of the optimal structure of PEEK reflecting the best parameter value of the length of amorphous chains, and the ratio of linkage conformations, such as loops, tails, and bridges. It was found that the long heat transfer paths of polymer chains were induced by the addition of BN sheets, which led to the improvement of the thermal conductivities of the PEEK/BN composites. In addition, the convergence of the thermal conductivities of the PEEK/BN composites in relation to BN sheet size was verified by the disconnection of the heat transfer path due to aggregation of the BN sheets.
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Multilayered nature in crystallization of polymer droplets studied by MD simulations: Orientation and entanglement. POLYMER 2023. [DOI: 10.1016/j.polymer.2023.125696] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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Liu W, Wu X, Li Y, Liu S, Lv Y, Zhang C. Fabrication of silver ions aramid fibers and polyethylene composites with excellent antibacterial and mechanical properties. E-POLYMERS 2022. [DOI: 10.1515/epoly-2022-0082] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Abstract
Nowadays, with the continuous understanding of the pathogenic mechanism of bacterium, the demand for antibacterial plastic products had significantly increased. Besides that, many counties issued mandatory standards for plastic products, which imposed strict requirements on ash content to prevent the addition of excessive inorganic matter to plastics in order to avoid weakening the properties of plastics and deteriorating the recyclable property. Based on this, the development of composites with organic fiber-loaded antibacterial agents is of practicable value and urgency. We used an open-ring addition reaction to modified aramid fiber (AF) by utilizing epoxypropyltrimethoxysilane to react with the reactive groups on the surface of AFs. Subsequently, the modified fibers were surface loaded with silver ionic glass beads. After that, a series of high-density polyethylene composites with excellent mechanical properties and antibacterial properties were prepared using melt mixing method. It was shown that the composite had a low ash value (1.88 wt%) even at a higher filling concentration (7 wt%) and the fibers could change the crystalline properties and morphology of the composite. Because of the fiber reinforcement and crystallization induction effects, the tensile strength and elasticity module of the composites could be improved by 141% and 136%, respectively. In addition, the composites had excellent long-lasting contact antibacterial effects against the inhibition of E. coli. The proposed organic fiber loading technique and antibacterial composites will provide a method for designing and preparing eco-friendly and high-performance plastic products.
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Affiliation(s)
- Wei Liu
- School of Materials and Energy Engineering, Guizhou Institute of Technology , Guiyang , 550003 , China
| | - Xian Wu
- School of Materials and Energy Engineering, Guizhou Institute of Technology , Guiyang , 550003 , China
| | - Yang Li
- School of Materials and Energy Engineering, Guizhou Institute of Technology , Guiyang , 550003 , China
| | - Shan Liu
- School of Materials and Energy Engineering, Guizhou Institute of Technology , Guiyang , 550003 , China
| | - Yunwei Lv
- R&D Department, Guizhou Yuandan New Materials Company , Zhenyuan , 522625 , China
| | - Chun Zhang
- School of Materials and Energy Engineering, Guizhou Institute of Technology , Guiyang , 550003 , China
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Dong Y, Wu J, Hu J, Yan S, Müller AJ, Sun X. Thermal-Field-Tuned Heterogeneous Amorphous States of Poly(vinylidene fluoride) Films with Precise Transition from Nonpolar to Polar Phase. Macromolecules 2022. [DOI: 10.1021/acs.macromol.2c01753] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Yufei Dong
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, North Third Ring Road 15, Beijing100029, China
| | - Jinghua Wu
- Key Laboratory of Rubber-Plastics of Ministry of Education, Shandong Provincial Key Laboratory of Rubber-Plastics, Qingdao University of Science & Technology, No. 53 Zhengzhou Road, Qingdao266042, China
| | - Jian Hu
- Key Laboratory of Rubber-Plastics of Ministry of Education, Shandong Provincial Key Laboratory of Rubber-Plastics, Qingdao University of Science & Technology, No. 53 Zhengzhou Road, Qingdao266042, China
| | - Shouke Yan
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, North Third Ring Road 15, Beijing100029, China
- Key Laboratory of Rubber-Plastics of Ministry of Education, Shandong Provincial Key Laboratory of Rubber-Plastics, Qingdao University of Science & Technology, No. 53 Zhengzhou Road, Qingdao266042, China
| | - Alejandro J. Müller
- POLYMAT and Department of Polymers and Advanced Materials: Physics, Chemistry and Technology, University of the Basque Country UPV/EHU, Paseo Manuel de Lardizábal 3, 20018Donostia-San Sebastián, Spain
- IKERBASQUE, Basque Foundation for Science, Plaza Euskadi 5, 48009Bilbao, Spain
| | - Xiaoli Sun
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, North Third Ring Road 15, Beijing100029, China
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