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Qu R, Song X, Wang Y, Zhao Y, Fu X. Hydroxyapatite cross-linked in situ polyvinyl alcohol hydrogel for bionic calcified cartilage layer. Colloids Surf B Biointerfaces 2023; 230:113510. [PMID: 37574614 DOI: 10.1016/j.colsurfb.2023.113510] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2023] [Revised: 07/25/2023] [Accepted: 08/05/2023] [Indexed: 08/15/2023]
Abstract
Many tissue engineering constructs have been investigated for repairing the calcified cartilage layer in the recent years, but engineering a consistent and stable interface to facilitate a graft-to-bone fixation remains a concern. In the work, hydroxyapatite (HA) is modified by diisocyanate (HDI) and integrated with polyvinyl alcohol (PVA) to prepare the hydrogel. The IR shows that HDI is grafted onto HA and helps HA to cross-link in situ in the PVA gel network. When the mass ratio of HA/PVA is 3.5 wt%, the swelling rate in the PBS of different pH reduced with time prolong, and the hydrogel takes on good swelling resistance. The tensile strength and toughness are 1890 KPa and 264 KJ/m-3, respectively, while the compression strength reaches 1125 KPa at compressive strain of 60%. The hydrogel not only is well durable via continuous 100 rounds of compression-recovery, but also has excellent bioactivity. The work will provide a platform for developing multifunctional soft tissue scaffold.
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Affiliation(s)
- Rui Qu
- School of Chemical Engineering, Changchun University of Technology, China
| | - Xiaofeng Song
- School of Chemical Engineering, Changchun University of Technology, China; Jiangxi Center of Modern Apparel Engineering and Technology, Jiangxi Institute of Fashion Technology, China.
| | - Yanhe Wang
- Jiangxi Center of Modern Apparel Engineering and Technology, Jiangxi Institute of Fashion Technology, China
| | - Yuze Zhao
- School of Chemical Engineering, Changchun University of Technology, China
| | - Xinyu Fu
- School of Chemical Engineering, Changchun University of Technology, China
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2
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Shuai H, Xiaoni Z, Yan L, Yanle L, Yan D, Lu M, Yingliang S, Wei M. Fabrication method for a magnetically induced highly oriented nanohydroxyapatite/collagen composite. J Appl Biomater Funct Mater 2022; 20:22808000221105727. [PMID: 35787019 DOI: 10.1177/22808000221105727] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Both collagen fibres and nanohydroxyapatite crystals have anisotropic magnetisation, which allows them to be oriented by a high magnetic field. Highly oriented nanohydroxyapatite/collagen composites were prepared using a high magnetic field combined with in situ synthesis. These highly oriented composites were investigated and compared with conventional composites. The results showed that the collagen fibres in the magnetically induced highly oriented nanohydroxyapatite/collagen composites had a preferred orientation and smaller molecular spacing, while the nanohydroxyapatite crystals were tightly adhered along the collagen fibre surface. The magnetically induced composites exhibited superior resistance to swelling and degradation along with high compressive strength. This artificial composite, with a structure and composition similar to natural bone, represents a new idea for improving materials for vertical or horizontal bone augmentation.
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Affiliation(s)
- Huang Shuai
- State Key Laboratory of Military Stomatology & National, Clinical Research Center for Oral Diseases & Shaanxi Engineering Research Center for Dental Materials and Advanced Manufacture, Department of Implant Dentistry & School of Stomatology, The Fourth Military Medical University, Xi' an, China
| | - Zhou Xiaoni
- State Key Laboratory of Military Stomatology & National, Clinical Research Center for Oral Diseases & Shaanxi Engineering Research Center for Dental Materials and Advanced Manufacture, Department of Implant Dentistry & School of Stomatology, The Fourth Military Medical University, Xi' an, China
| | - Liu Yan
- State Key Laboratory of Military Stomatology & National, Clinical Research Center for Oral Diseases & Shaanxi Engineering Research Center for Dental Materials and Advanced Manufacture, Department of Implant Dentistry & School of Stomatology, The Fourth Military Medical University, Xi' an, China
| | - Liu Yanle
- State Key Laboratory of Military Stomatology & National, Clinical Research Center for Oral Diseases & Shaanxi Engineering Research Center for Dental Materials and Advanced Manufacture, Department of Implant Dentistry & School of Stomatology, The Fourth Military Medical University, Xi' an, China
| | - Duan Yan
- State Key Laboratory of Military Stomatology & National, Clinical Research Center for Oral Diseases & Shaanxi Engineering Research Center for Dental Materials and Advanced Manufacture, Department of Implant Dentistry & School of Stomatology, The Fourth Military Medical University, Xi' an, China
| | - Meng Lu
- Sannie Bioengineering Technology Co., Ltd., Tianjin, China
| | - Song Yingliang
- State Key Laboratory of Military Stomatology & National, Clinical Research Center for Oral Diseases & Shaanxi Engineering Research Center for Dental Materials and Advanced Manufacture, Department of Implant Dentistry & School of Stomatology, The Fourth Military Medical University, Xi' an, China
| | - Ma Wei
- State Key Laboratory of Military Stomatology & National, Clinical Research Center for Oral Diseases & Shaanxi Engineering Research Center for Dental Materials and Advanced Manufacture, Department of Implant Dentistry & School of Stomatology, The Fourth Military Medical University, Xi' an, China
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Kumar BYS, Isloor AM, Kumar GCM, Inamuddin, Asiri AM. Nanohydroxyapatite Reinforced Chitosan Composite Hydrogel with Tunable Mechanical and Biological Properties for Cartilage Regeneration. Sci Rep 2019; 9:15957. [PMID: 31685836 PMCID: PMC6828803 DOI: 10.1038/s41598-019-52042-7] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2019] [Accepted: 10/11/2019] [Indexed: 01/09/2023] Open
Abstract
With the continuous quest of developing hydrogel for cartilage regeneration with superior mechanobiological properties are still becoming a challenge. Chitosan (CS) hydrogels are the promising implant materials due to an analogous character of the soft tissue; however, their low mechanical strength and durability together with its lack of integrity with surrounding tissues hinder the load-bearing application. This can be solved by developing a composite chitosan hydrogel reinforced with Hydroxyapatite Nanorods (HANr). The objective of this work is to develop and characterize (physically, chemically, mechanically and biologically) the composite hydrogels loaded with different concentration of hydroxyapatite nanorod. The concentration of hydroxyapatite in the composite hydrogel was optimized and it was found that, reinforcement modifies the hydrogel network by promoting the secondary crosslinking. The compression strength could reach 1.62 ± 0.02 MPa with a significant deformation of 32% and exhibits time-dependent, rapid self-recoverable and fatigue resistant behavior based on the cyclic loading-unloading compression test. The storage modulus value can reach nearly 10 kPa which is needed for the proposed application. Besides, composite hydrogels show an excellent antimicrobial activity against Escherichia coli, Staphylococcus aureus bacteria's and Candida albicans fungi and their cytocompatibility towards L929 mouse fibroblasts provide a potential pathway to developing a composite hydrogel for cartilage regeneration.
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Affiliation(s)
- B Y Santosh Kumar
- Polymer Composites Laboratory, Department of Mechanical Engineering, National Institute of Technology Karnataka, Surathkal, Mangalore, 575 025, India
| | - Arun M Isloor
- Membrane Technology Laboratory, Department of Chemistry, National Institute of Technology Karnataka, Surathkal, Mangalore, 575 025, India.
| | - G C Mohan Kumar
- Polymer Composites Laboratory, Department of Mechanical Engineering, National Institute of Technology Karnataka, Surathkal, Mangalore, 575 025, India.
| | - Inamuddin
- Chemistry Department, Faculty of Science, King Abdulaziz University, Jeddah, 21589, Saudi Arabia.
- Centre of Excellence for Advanced Materials Research, King Abdulaziz University, Jeddah, 21589, Saudi Arabia.
- Advanced Functional Materials Laboratory, Department of Applied Chemistry, Faculty of Engineering and Technology, Aligarh Muslim University, Aligarh, 202 002, India.
| | - Abdullah M Asiri
- Chemistry Department, Faculty of Science, King Abdulaziz University, Jeddah, 21589, Saudi Arabia
- Centre of Excellence for Advanced Materials Research, King Abdulaziz University, Jeddah, 21589, Saudi Arabia
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Banerjee A, Ganguly S. Mechanical behaviour of alginate film with embedded voids under compression-decompression cycles. Sci Rep 2019; 9:13193. [PMID: 31519951 PMCID: PMC6744475 DOI: 10.1038/s41598-019-49589-w] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2019] [Accepted: 08/23/2019] [Indexed: 01/13/2023] Open
Abstract
Voids of 300 µm diameter were embedded uniformly as monolayer in alginate gel film using a fluidic device. Voids of these dimensions in biopolymer gel film are desired for better transport of bioactive species and cell colonization in engineered tissues. In this article, the role of embedded voids in reducing compressive stress, hysteresis, and time scale of reheal vis-a-vis expulsion of pore fluid and its reabsorption upon reversal of load are reviewed. The cyclic loading was conducted with varying amplitude and frequency. The irreversible changes, if any in the gel structure under extreme compression were analyzed. The rate of expulsion of aqueous phase directly relates to the permeability of the gel film that is estimated here using simplified momentum and volumetric balance equations. The decrease in permeability with deformation is analyzed further, and the contribution of voids in this regard is discussed.
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Affiliation(s)
- Arindam Banerjee
- Department of Chemical Engineering, Indian Institute of Technology, Kharagpur, 721302, India
| | - Somenath Ganguly
- Department of Chemical Engineering, Indian Institute of Technology, Kharagpur, 721302, India.
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High-strength cellulose-polyacrylamide hydrogels: Mechanical behavior and structure depending on the type of cellulose. J Mech Behav Biomed Mater 2019; 100:103385. [PMID: 31400696 DOI: 10.1016/j.jmbbm.2019.103385] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2018] [Revised: 07/02/2019] [Accepted: 08/02/2019] [Indexed: 12/19/2022]
Abstract
Two types of stiff and high-strength composite hydrogels possessing the structure of interpenetrating polymer networks were synthesized via free-radical polymerization of acrylamide carried out straight within the previously formed physical network of regenerated plant cellulose or bacterial cellulose (PC and BC respectively) that was swollen in the reactive solution. The mechanical behavior of synthesized hydrogels subjected to the action of compressive deformations with different amplitude values was studied. The analysis of the stress-strain curves of compression tests of the hydrogels of both types obtained in different test conditions demonstrates the substantial difference in their mechanical behavior. Both the PC- and BC-based hydrogels withstand successfully the one-shot compression with the amplitude up to 80%, but in the conditions of the multiple compression tests (cyclic compressions) during the subsequent compression acts the dramatic increase in the stiffness of the BC-based hydrogels was observed at the deformation region beyond 60%. This effect can be explained by the deep reorganization of the intermolecular structure of the material with the stress-induced reorientation of BC micro-fibrils. Submicron- and micron-scale specific features of structures of composite hydrogels of both types were studied by cryo-scanning electron microscopy to explain the peculiarities of the mechanical effects observed.
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Gao LL, Lin XL, Liu DD, Chen L, Zhang CQ, Gao H. Depth-dependent ratcheting strains of young and adult articular cartilages by experiments and predictions. Biomed Eng Online 2019; 18:85. [PMID: 31362738 PMCID: PMC6668180 DOI: 10.1186/s12938-019-0705-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2019] [Accepted: 07/23/2019] [Indexed: 11/24/2022] Open
Abstract
Background Ratcheting strain is produced due to the repeated accumulation of compressive strain in cartilage and may be a precursor to osteoarthritis. The aim of this study was to investigate the ratcheting behaviors of young and adult articular cartilages under cyclic compression by experiments and theoretical predictions. Methods A series of uniaxial cyclic compression tests were conducted for young and adult cartilage, and the effects of different loading conditions on their ratcheting behaviors were probed. A theoretical ratcheting model was constructed and applied to predict the ratcheting strains of young and adult cartilages with different loading conditions. Results Ratcheting strains of young and adult cartilages rapidly increased at the initial stage, followed by a slower increase in subsequent stages. The strain accumulation value and its rate for young cartilage were greater than them for adult cartilage. The ratcheting strains of the two groups of cartilage samples decreased with increasing stress rate, while they increased with increasing stress amplitude. As the stress amplitude increased, the gap between the ratcheting strains of young and adult cartilages increased gradually. The ratcheting strains of young and adult cartilages decreased along the cartilage depth from the surface to the deep layer. The ratcheting strains of different layers increased with the compressive cycle, and the difference among the three layers was noticeable. Additionally, the theoretical predictions agreed with the experimental data. Conclusions Overall, the ratcheting behavior of articular cartilage is affected by the degree of articular cartilage maturation.
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Affiliation(s)
- Li-Lan Gao
- Tianjin Key Laboratory for Advanced Mechatronic System Design and Intelligent Control, School of Mechanical Engineering, Tianjin University of Technology, Tianjin, China. .,National Demonstration Center for Experimental Mechanical and Electrical Engineering Education (Tianjin University of Technology), Tianjin, China.
| | - Xiang-Long Lin
- Tianjin Key Laboratory for Advanced Mechatronic System Design and Intelligent Control, School of Mechanical Engineering, Tianjin University of Technology, Tianjin, China.,National Demonstration Center for Experimental Mechanical and Electrical Engineering Education (Tianjin University of Technology), Tianjin, China
| | - Dong-Dong Liu
- Tianjin Key Laboratory for Advanced Mechatronic System Design and Intelligent Control, School of Mechanical Engineering, Tianjin University of Technology, Tianjin, China.,National Demonstration Center for Experimental Mechanical and Electrical Engineering Education (Tianjin University of Technology), Tianjin, China
| | - Ling Chen
- Tianjin Key Laboratory for Advanced Mechatronic System Design and Intelligent Control, School of Mechanical Engineering, Tianjin University of Technology, Tianjin, China. .,National Demonstration Center for Experimental Mechanical and Electrical Engineering Education (Tianjin University of Technology), Tianjin, China.
| | - Chun-Qiu Zhang
- Tianjin Key Laboratory for Advanced Mechatronic System Design and Intelligent Control, School of Mechanical Engineering, Tianjin University of Technology, Tianjin, China.,National Demonstration Center for Experimental Mechanical and Electrical Engineering Education (Tianjin University of Technology), Tianjin, China
| | - Hong Gao
- School of Chemical Engineering and Technology, Tianjin University, Tianjin, China
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Zhang YR, Xu KJ, Bai YL, Tang LQ, Jiang ZY, Liu YP, Liu ZJ, Zhou LC, Zhou XF. Features of the volume change and a new constitutive equation of hydrogels under uniaxial compression. J Mech Behav Biomed Mater 2018; 85:181-187. [PMID: 29906673 DOI: 10.1016/j.jmbbm.2018.06.004] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2018] [Revised: 05/26/2018] [Accepted: 06/02/2018] [Indexed: 11/26/2022]
Abstract
For high-water content hydrogels in compression, the water inside of hydrogels contributes to the response of hydrogels to external loads directly, but part of the water is expelled from hydrogels in the meantime to change the volume of the hydrogel and reduce the contribution. In order to consider the contribution of the water in the constitution equation, PVA (polyvinyl alcohol) hydrogels with high-water content were used as examples, and compressive experiments were carried out to measure both the stress-strain relation and the change of the volume in the meantime. By considering the effect of the difference of the contribution of water in different directions of the hydrogel, we deduced a new constitutive equation, which can pretty well depict the stress-strain of hydrogels with different water contents. The results showed that the contribution of water to the total stress increases with the compression strain and even exceed that of the polymer, although the expelled water reduces the contribution at the early loading stage, which well explains the difference of elastic moduli of hydrogels in compression and tension.
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Affiliation(s)
- Y R Zhang
- School of Civil Engineering and Transportation, South China University of Technology, No.381, Wushan Road, Guangzhou, Guangdong, China; Guangdong Institute of Intelligent Manufacturing, Guangzhou, China
| | - K J Xu
- School of Civil Engineering and Transportation, South China University of Technology, No.381, Wushan Road, Guangzhou, Guangdong, China
| | - Y L Bai
- School of Civil Engineering and Transportation, South China University of Technology, No.381, Wushan Road, Guangzhou, Guangdong, China; LNM, Institute of Mechanics, Chinese Academy of Sciences, Beijing, China
| | - L Q Tang
- School of Civil Engineering and Transportation, South China University of Technology, No.381, Wushan Road, Guangzhou, Guangdong, China; State Key Laboratory of Subtropical Building Science, South China University of Technology, No.381, Wushan Road, Guangzhou, Guangdong, China.
| | - Z Y Jiang
- School of Civil Engineering and Transportation, South China University of Technology, No.381, Wushan Road, Guangzhou, Guangdong, China
| | - Y P Liu
- School of Civil Engineering and Transportation, South China University of Technology, No.381, Wushan Road, Guangzhou, Guangdong, China
| | - Z J Liu
- School of Civil Engineering and Transportation, South China University of Technology, No.381, Wushan Road, Guangzhou, Guangdong, China
| | - L C Zhou
- School of Civil Engineering and Transportation, South China University of Technology, No.381, Wushan Road, Guangzhou, Guangdong, China
| | - X F Zhou
- Guangdong Institute of Intelligent Manufacturing, Guangzhou, China
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R. Rebelo A, Archer AJ, Chen X, Liu C, Yang G, Liu Y. Dehydration of bacterial cellulose and the water content effects on its viscoelastic and electrochemical properties. SCIENCE AND TECHNOLOGY OF ADVANCED MATERIALS 2018; 19:203-211. [PMID: 29707063 PMCID: PMC5917443 DOI: 10.1080/14686996.2018.1430981] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/22/2017] [Revised: 01/16/2018] [Accepted: 01/18/2018] [Indexed: 05/28/2023]
Abstract
Bacterial cellulose (BC) has interesting properties including high crystallinity, tensile strength, degree of polymerisation, water holding capacity (98%) and an overall attractive 3D nanofibrillar structure. The mechanical and electrochemical properties can be tailored upon incomplete BC dehydration. Under different water contents (100, 80 and 50%), the rheology and electrochemistry of BC were evaluated, showing a progressive stiffening and increasing resistance with lower capacitance after partial dehydration. BC water loss was mathematically modelled for predicting its water content and for understanding the structural changes of post-dried BC. The dehydration of the samples was determined via water evaporation at 37 °C for different diameters and thicknesses. The gradual water evaporation observed was well-described by the model proposed (R2 up to 0.99). The mathematical model for BC water loss may allow the optimisation of these properties for an intended application and may be extendable for other conditions and purposes.
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Affiliation(s)
- Ana R. Rebelo
- Centre of Biological Engineering, Wolfson School, Loughborough University, Loughorough, UK
- Wolfson School of Mechanical, Electrical and Manufacturing Engineering, Loughborough University, Loughborough, UK
| | - Andrew J. Archer
- Department of Mathematical Sciences, Loughborough University, Loughborough, UK
| | - Xiuli Chen
- Department of Biomedical Engineering, College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan, P.R. China
| | - Changqing Liu
- Wolfson School of Mechanical, Electrical and Manufacturing Engineering, Loughborough University, Loughborough, UK
| | - Guang Yang
- Department of Biomedical Engineering, College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan, P.R. China
| | - Yang Liu
- Centre of Biological Engineering, Wolfson School, Loughborough University, Loughorough, UK
- Wolfson School of Mechanical, Electrical and Manufacturing Engineering, Loughborough University, Loughborough, UK
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