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Bernardes BG, Baptista-Silva S, Illanes-Bordomás C, Magalhães R, Dias JR, Alves NMF, Costa R, García-González CA, Oliveira AL. Expanding the Potential of Self-Assembled Silk Fibroin as Aerogel Particles for Tissue Regeneration. Pharmaceutics 2023; 15:2605. [PMID: 38004583 PMCID: PMC10675346 DOI: 10.3390/pharmaceutics15112605] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2023] [Revised: 10/31/2023] [Accepted: 11/04/2023] [Indexed: 11/26/2023] Open
Abstract
A newly produced silk fibroin (SF) aerogel particulate system using a supercritical carbon dioxide (scCO2)-assisted drying technology is herein proposed for biomedical applications. Different concentrations of silk fibroin (3%, 5%, and 7% (w/v)) were explored to investigate the potential of this technology to produce size- and porosity-controlled particles. Laser diffraction, helium pycnometry, nitrogen adsorption-desorption analysis and Fourier Transform Infrared with Attenuated Total Reflectance (FTIR-ATR) spectroscopy were performed to characterize the physicochemical properties of the material. The enzymatic degradation profile of the SF aerogel particles was evaluated by immersion in protease XIV solution, and the biological properties by cell viability and cell proliferation assays. The obtained aerogel particles were mesoporous with high and concentration dependent specific surface area (203-326 m2/g). They displayed significant antioxidant activity and sustained degradation in the presence of protease XIV enzyme. The in vitro assessment using human dermal fibroblasts (HDF) confirm the particles' biocompatibility, as well as the enhancement in cell viability and proliferation.
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Affiliation(s)
- Beatriz G. Bernardes
- Universidade Católica Portuguesa, CBQF—Centro de Biotecnologia e Química Fina—Laboratório Associado, Escola Superior de Biotecnologia, Rua Diogo Botelho 1327, 4169-005 Porto, Portugal; (B.G.B.); (S.B.-S.); (R.M.)
- AerogelsLab, I+D Farma Group (GI-1645), Department of Pharmacology, Pharmacy and Pharmaceutical Technology, iMATUS and Health Research Institute of Santiago de Compostela (IDIS), Universidade de Santiago de Compostela, E-15782 Santiago de Compostela, Spain;
| | - Sara Baptista-Silva
- Universidade Católica Portuguesa, CBQF—Centro de Biotecnologia e Química Fina—Laboratório Associado, Escola Superior de Biotecnologia, Rua Diogo Botelho 1327, 4169-005 Porto, Portugal; (B.G.B.); (S.B.-S.); (R.M.)
| | - Carlos Illanes-Bordomás
- AerogelsLab, I+D Farma Group (GI-1645), Department of Pharmacology, Pharmacy and Pharmaceutical Technology, iMATUS and Health Research Institute of Santiago de Compostela (IDIS), Universidade de Santiago de Compostela, E-15782 Santiago de Compostela, Spain;
| | - Rui Magalhães
- Universidade Católica Portuguesa, CBQF—Centro de Biotecnologia e Química Fina—Laboratório Associado, Escola Superior de Biotecnologia, Rua Diogo Botelho 1327, 4169-005 Porto, Portugal; (B.G.B.); (S.B.-S.); (R.M.)
| | - Juliana Rosa Dias
- Centre for Rapid and Sustainable Product Development, Instituto Politécnico de Leiria, 2430-028 Marinha Grande, Portugal; (J.R.D.); (N.M.F.A.)
| | - Nuno M. F. Alves
- Centre for Rapid and Sustainable Product Development, Instituto Politécnico de Leiria, 2430-028 Marinha Grande, Portugal; (J.R.D.); (N.M.F.A.)
| | - Raquel Costa
- Universidade Católica Portuguesa, CBQF—Centro de Biotecnologia e Química Fina—Laboratório Associado, Escola Superior de Biotecnologia, Rua Diogo Botelho 1327, 4169-005 Porto, Portugal; (B.G.B.); (S.B.-S.); (R.M.)
- Biochemistry Unit, Department of Biomedicine, Faculdade de Medicina, Universidade do Porto, 4200-319 Porto, Portugal
| | - Carlos A. García-González
- AerogelsLab, I+D Farma Group (GI-1645), Department of Pharmacology, Pharmacy and Pharmaceutical Technology, iMATUS and Health Research Institute of Santiago de Compostela (IDIS), Universidade de Santiago de Compostela, E-15782 Santiago de Compostela, Spain;
| | - Ana Leite Oliveira
- Universidade Católica Portuguesa, CBQF—Centro de Biotecnologia e Química Fina—Laboratório Associado, Escola Superior de Biotecnologia, Rua Diogo Botelho 1327, 4169-005 Porto, Portugal; (B.G.B.); (S.B.-S.); (R.M.)
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Machnicki CE, DuBois EM, Fay M, Shrestha S, Saleeba ZSSL, Hruska AM, Ahmed Z, Srivastava V, Chen PY, Wong IY. Graphene oxide nanosheets augment silk fibroin aerogels for enhanced water stability and oil adsorption. NANOSCALE ADVANCES 2023; 5:6078-6092. [PMID: 37941955 PMCID: PMC10628998 DOI: 10.1039/d3na00350g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/22/2023] [Accepted: 10/05/2023] [Indexed: 11/10/2023]
Abstract
Nanocomposite aerogels exhibit high porosity and large interfacial surface areas, enabling enhanced chemical transport and reactivity. Such mesoporous architectures can be prepared by freeze-casting naturally-derived biopolymers such as silk fibroin, but often form mechanically weak structures that degrade in water, which limits their performance under ambient conditions. Adding 2D material fillers such as graphene oxide (GO) or transition metal carbides (e.g. MXene) could potentially reinforce these aerogels via stronger intermolecular interactions with the polymeric binder. Here, we show that freeze-casting of GO nanosheets with silk fibroin results in a highly water-stable, mechanically robust aerogel, with considerably enhanced properties relative to silk-only or silk-MXene aerogels. These silk-GO aerogels exhibit high contact angles with water and are highly water stable. Moreover, aerogels can adsorb up 25-35 times their mass in oil, and can be used robustly for selective oil separation from water. This increased stability may occur due to strengthened intermolecular interactions such as hydrogen bonding, despite the random coil and α-helix conformation of silk fibroin, which is typically more soluble in water. Finally, we show these aerogels can be prepared at scale by freeze-casting on a copper mesh. Ultimately, we envision that these multicomponent aerogels could be widely utilized for molecular separations and environmental sensing, as well as for thermal insulation and electrical conductivity.
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Affiliation(s)
- Catherine E Machnicki
- School of Engineering, Brown University 184 Hope St, Box D. Providence RI 02912 USA
- Department of Chemistry, Brown University 324 Brook St, Box H. Providence RI 02912 USA
| | - Eric M DuBois
- School of Engineering, Brown University 184 Hope St, Box D. Providence RI 02912 USA
| | - Meg Fay
- School of Engineering, Brown University 184 Hope St, Box D. Providence RI 02912 USA
- Department of Chemistry, Brown University 324 Brook St, Box H. Providence RI 02912 USA
| | - Snehi Shrestha
- Department of Chemical and Biomolecular Engineering, University of Maryland 4418 Stadium Dr College Park MD 20742 USA
| | | | - Alex M Hruska
- School of Engineering, Brown University 184 Hope St, Box D. Providence RI 02912 USA
| | - Zahra Ahmed
- School of Engineering, Brown University 184 Hope St, Box D. Providence RI 02912 USA
| | - Vikas Srivastava
- School of Engineering, Brown University 184 Hope St, Box D. Providence RI 02912 USA
| | - Po-Yen Chen
- Department of Chemical and Biomolecular Engineering, University of Maryland 4418 Stadium Dr College Park MD 20742 USA
| | - Ian Y Wong
- School of Engineering, Brown University 184 Hope St, Box D. Providence RI 02912 USA
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Karamikamkar S, Yalcintas EP, Haghniaz R, de Barros NR, Mecwan M, Nasiri R, Davoodi E, Nasrollahi F, Erdem A, Kang H, Lee J, Zhu Y, Ahadian S, Jucaud V, Maleki H, Dokmeci MR, Kim H, Khademhosseini A. Aerogel-Based Biomaterials for Biomedical Applications: From Fabrication Methods to Disease-Targeting Applications. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2023; 10:e2204681. [PMID: 37217831 PMCID: PMC10427407 DOI: 10.1002/advs.202204681] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/03/2023] [Indexed: 05/24/2023]
Abstract
Aerogel-based biomaterials are increasingly being considered for biomedical applications due to their unique properties such as high porosity, hierarchical porous network, and large specific pore surface area. Depending on the pore size of the aerogel, biological effects such as cell adhesion, fluid absorption, oxygen permeability, and metabolite exchange can be altered. Based on the diverse potential of aerogels in biomedical applications, this paper provides a comprehensive review of fabrication processes including sol-gel, aging, drying, and self-assembly along with the materials that can be used to form aerogels. In addition to the technology utilizing aerogel itself, it also provides insight into the applicability of aerogel based on additive manufacturing technology. To this end, how microfluidic-based technologies and 3D printing can be combined with aerogel-based materials for biomedical applications is discussed. Furthermore, previously reported examples of aerogels for regenerative medicine and biomedical applications are thoroughly reviewed. A wide range of applications with aerogels including wound healing, drug delivery, tissue engineering, and diagnostics are demonstrated. Finally, the prospects for aerogel-based biomedical applications are presented. The understanding of the fabrication, modification, and applicability of aerogels through this study is expected to shed light on the biomedical utilization of aerogels.
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Affiliation(s)
| | | | - Reihaneh Haghniaz
- Terasaki Institute for Biomedical Innovation (TIBI)Los AngelesCA90024USA
| | | | - Marvin Mecwan
- Terasaki Institute for Biomedical Innovation (TIBI)Los AngelesCA90024USA
| | - Rohollah Nasiri
- Terasaki Institute for Biomedical Innovation (TIBI)Los AngelesCA90024USA
| | - Elham Davoodi
- Terasaki Institute for Biomedical Innovation (TIBI)Los AngelesCA90024USA
- Department of Mechanical and Mechatronics EngineeringUniversity of WaterlooWaterlooONN2L 3G1Canada
| | - Fatemeh Nasrollahi
- Terasaki Institute for Biomedical Innovation (TIBI)Los AngelesCA90024USA
- Department of BioengineeringUniversity of California‐Los Angeles (UCLA)Los AngelesCA90095USA
| | - Ahmet Erdem
- Department of Biomedical EngineeringKocaeli UniversityUmuttepe CampusKocaeli41001Turkey
| | - Heemin Kang
- Department of Materials Science and EngineeringKorea UniversitySeoul02841Republic of Korea
| | - Junmin Lee
- Department of Materials Science and EngineeringPohang University of Science and Technology (POSTECH)Pohang37673Republic of Korea
| | - Yangzhi Zhu
- Terasaki Institute for Biomedical Innovation (TIBI)Los AngelesCA90024USA
| | - Samad Ahadian
- Terasaki Institute for Biomedical Innovation (TIBI)Los AngelesCA90024USA
| | - Vadim Jucaud
- Terasaki Institute for Biomedical Innovation (TIBI)Los AngelesCA90024USA
| | - Hajar Maleki
- Institute of Inorganic ChemistryDepartment of ChemistryUniversity of CologneGreinstraße 650939CologneGermany
- Center for Molecular Medicine CologneCMMC Research CenterRobert‐Koch‐Str. 2150931CologneGermany
| | | | - Han‐Jun Kim
- Terasaki Institute for Biomedical Innovation (TIBI)Los AngelesCA90024USA
- College of PharmacyKorea UniversitySejong30019Republic of Korea
| | - Ali Khademhosseini
- Terasaki Institute for Biomedical Innovation (TIBI)Los AngelesCA90024USA
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Biomedical applications of silica-based aerogels: a comprehensive review. Macromol Res 2023. [DOI: 10.1007/s13233-023-00142-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/06/2023]
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5
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Yang H, Wang P, Yang Q, Wang D, Wang Y, Kuai L, Wang Z. Superelastic and multifunctional fibroin aerogels from multiscale silk micro-nanofibrils exfoliated via deep eutectic solvent. Int J Biol Macromol 2023; 224:1412-1422. [PMID: 36550790 DOI: 10.1016/j.ijbiomac.2022.10.228] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2022] [Revised: 10/19/2022] [Accepted: 10/24/2022] [Indexed: 11/05/2022]
Abstract
Superelastic silk fibroin (SF)-based aerogels can be used as multifunctional substrates, exhibiting a promising prospect in air filtration, thermal insulation, and biomedical materials. However, fabrication of the superelastic pure SF aerogels without adding synthetic polymers remains challenging. Here, the SF micro-nano fibrils (SMNFs) that preserved mesostructures are extracted from SF fibers as building blocks of aerogels by a controllable deep eutectic solvent liquid exfoliation technique. SMNFs can assemble into multiscale fibril networks during the freeze-inducing process, resulting in all-natural SMNF aerogels (SMNFAs) with hierarchical cellular architectures after lyophilization. Benefiting from these structural features, the SMNFAs demonstrate desirable properties including ultra-low density (as low as 4.71 mg/cm3) and superelasticity (over 85 % stress retention after 100 compression cycles at 60 % strain). Furthermore, the potential applications of superelastic SMNFAs in air purification and thermal insulation are investigated to exhibit their functionality, mechanical elasticity, and structural stability. This work provides a reliable approach for the fabrication of highly elastic SF aerogels and endows application prospects in air purification and thermal insulation opportunities.
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Affiliation(s)
- Haiwei Yang
- School of Textile and Garment, Anhui Polytechnic University, Wuhu, Anhui 241000, China
| | - Peng Wang
- School of Textile and Garment, Anhui Polytechnic University, Wuhu, Anhui 241000, China
| | - Qiliang Yang
- School of Textile and Garment, Anhui Polytechnic University, Wuhu, Anhui 241000, China
| | - Dengfeng Wang
- School of Materials Science & Engineering, Zhejiang Sci-Tech University, Hangzhou, Zhejiang 310018, China
| | - Yong Wang
- School of Textile and Garment, Anhui Polytechnic University, Wuhu, Anhui 241000, China
| | - Long Kuai
- School of Textile and Garment, Anhui Polytechnic University, Wuhu, Anhui 241000, China; School of Chemical and Environmental Engineering, Anhui Laboratory of Clean Catalytic Engineering, Anhui Laboratory of Functional Coordinated Complexes for Materials Chemistry and Application, Anhui Polytechnic University, Wuhu, Anhui 241000, China.
| | - Zongqian Wang
- School of Textile and Garment, Anhui Polytechnic University, Wuhu, Anhui 241000, China.
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6
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Designing Silk-Based Cryogels for Biomedical Applications. Biomimetics (Basel) 2022; 8:biomimetics8010005. [PMID: 36648791 PMCID: PMC9844337 DOI: 10.3390/biomimetics8010005] [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: 11/28/2022] [Revised: 12/17/2022] [Accepted: 12/19/2022] [Indexed: 12/24/2022] Open
Abstract
There is a need to develop the next generation of medical products that require biomaterials with improved properties. The versatility of various gels has pushed them to the forefront of biomaterials research. Cryogels, a type of gel scaffold made by controlled crosslinking under subzero or freezing temperatures, have great potential to address many current challenges. Unlike their hydrogel counterparts, which are also able to hold large amounts of biologically relevant fluids such as water, cryogels are often characterized by highly dense and crosslinked polymer walls, macroporous structures, and often improved properties. Recently, one biomaterial that has garnered a lot of interest for cryogel fabrication is silk and its derivatives. In this review, we provide a brief overview of silk-based biomaterials and how cryogelation can be used for novel scaffold design. We discuss how various parameters and fabrication strategies can be used to tune the properties of silk-based biomaterials. Finally, we discuss specific biomedical applications of silk-based biomaterials. Ultimately, we aim to demonstrate how the latest advances in silk-based cryogel scaffolds can be used to address challenges in numerous bioengineering disciplines.
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Hamidi S, Monajjemzadeh F, Siahi‐Shadbad M, Khatibi SA, Farjami A. Antibacterial activity of natural polymer gels and potential applications without synthetic antibiotics. POLYM ENG SCI 2022. [DOI: 10.1002/pen.26184] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Samin Hamidi
- Food and Drug Safety Research Center Tabriz University of Medical Sciences Tabriz Iran
- Pharmaceutical Analysis Research Center Tabriz University of Medical Sciences Tabriz Iran
| | - Farnaz Monajjemzadeh
- Food and Drug Safety Research Center Tabriz University of Medical Sciences Tabriz Iran
- Pharmaceutical and Food Control Department, Faculty of Pharmacy Tabriz University of Medical Sciences Tabriz Iran
| | - Mohammadreza Siahi‐Shadbad
- Pharmaceutical and Food Control Department, Faculty of Pharmacy Tabriz University of Medical Sciences Tabriz Iran
| | - Seyed Amin Khatibi
- Food and Drug Safety Research Center Tabriz University of Medical Sciences Tabriz Iran
| | - Afsaneh Farjami
- Food and Drug Safety Research Center Tabriz University of Medical Sciences Tabriz Iran
- Pharmaceutical Analysis Research Center Tabriz University of Medical Sciences Tabriz Iran
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Samie M, Khan AF, Hardy JG, Yameen MA. Electrospun Antibacterial Composites for Cartilage Tissue Engineering. Macromol Biosci 2022; 22:e2200219. [PMID: 35851562 DOI: 10.1002/mabi.202200219] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2022] [Revised: 06/30/2022] [Indexed: 11/11/2022]
Abstract
Implantation of biomaterials capable of the controlled release of antibacterials during articular cartilage repair may prevent postoperative infections. Herein, biomaterials are prepared with biomimetic architectures (nonwoven mats of fibers) via electrospinning that are composed of poly(ɛ-caprolactone), poly(lactic acid), and Bombyx mori silk fibroin (with varying ratios) and, optionally, an antibiotic drug (cefixime trihydrate). The composition, morphology, and mechanical properties of the nanofibrous mats are characterized using scanning electron microscope, Fourier transform infrared spectroscopy, and tensile testing. The nonwoven mats have nanoscale fibers (typical diameters of 324-725 nm) and are capable of controlling the release profiles of the drug, with antibacterial activity against Gram +ve and Gram -ve bacteria (two common strains of human pathogenic bacteria, Staphylococcus aureus and Escherichia coli) under in vitro static conditions. The drug loaded nanofiber mats display cytocompatibility comparable to pure poly(ɛ-caprolactone) nanofibers when cultured with National Institutes of Health (NIH) NIH-3T3 fibroblast cell line and have long-term potential for clinical applications in the field of pharmaceutical sciences.
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Affiliation(s)
- Muhammad Samie
- Interdisciplinary Research Centre in Biomedical Materials COMSATS University Islamabad Lahore campus Lahore 54000 Pakistan
- Department of Pharmacy COMSATS University Islamabad Abbottabad campus Abbottabad Khyber Pakhtunkhwa 22060 Pakistan
- Department of Chemistry Lancaster University Lancaster Lancashire LA1 4YB UK
- Materials Science Institute Lancaster University Lancaster Lancashire LA1 4YB UK
- Institute of Pharmaceutical Sciences Khyber Medical University Peshawar Khyber Pakhtunkhwa 25100 Pakistan
| | - Ather Farooq Khan
- Interdisciplinary Research Centre in Biomedical Materials COMSATS University Islamabad Lahore campus Lahore 54000 Pakistan
| | - John George Hardy
- Department of Chemistry Lancaster University Lancaster Lancashire LA1 4YB UK
- Materials Science Institute Lancaster University Lancaster Lancashire LA1 4YB UK
| | - Muhammad Arfat Yameen
- Department of Pharmacy COMSATS University Islamabad Abbottabad campus Abbottabad Khyber Pakhtunkhwa 22060 Pakistan
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Horvat G, Pantić M, Knez Ž, Novak Z. A Brief Evaluation of Pore Structure Determination for Bioaerogels. Gels 2022; 8:gels8070438. [PMID: 35877523 PMCID: PMC9316429 DOI: 10.3390/gels8070438] [Citation(s) in RCA: 17] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2022] [Revised: 07/01/2022] [Accepted: 07/11/2022] [Indexed: 01/03/2023] Open
Abstract
This review discusses the most commonly employed methods for determining pore size and pore size distribution in bioaerogels. Aerogels are materials with high porosity and large surface areas. Most of their pores are in the range of mesopores, between 2 and 50 nm. They often have smaller or larger pores, which presents a significant challenge in determining the exact mean pore size and pore size distribution in such materials. The precision and actual value of the pore size are of considerable importance since pore size and pore size distribution are among the main properties of aerogels and are often directly connected with the final application of those materials. However, many recently published papers discuss or present pore size as one of the essential achievements despite the misinterpretation or the wrong assignments of pore size determination. This review will help future research and publications evaluate the pore size of aerogels more precisely and discuss it correctly. The study covers methods such as gas adsorption, from which BJH and DFT models are often used, SEM, mercury porosimetry, and thermoporometry. The methods are described, and the results obtained are discussed. The following paper shows that there is still no precise method for determining pore size distribution or mean pore size in aerogels until now. Knowing that, it is expected that this field will evolve in the future.
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Affiliation(s)
- Gabrijela Horvat
- Faculty of Chemistry and Chemical Engineering, University of Maribor, Smetanova 17, 2000 Maribor, Slovenia; (G.H.); (M.P.); (Ž.K.)
| | - Milica Pantić
- Faculty of Chemistry and Chemical Engineering, University of Maribor, Smetanova 17, 2000 Maribor, Slovenia; (G.H.); (M.P.); (Ž.K.)
| | - Željko Knez
- Faculty of Chemistry and Chemical Engineering, University of Maribor, Smetanova 17, 2000 Maribor, Slovenia; (G.H.); (M.P.); (Ž.K.)
- Faculty of Medicine, University of Maribor, Taborska ulica 8, 2000 Maribor, Slovenia
| | - Zoran Novak
- Faculty of Chemistry and Chemical Engineering, University of Maribor, Smetanova 17, 2000 Maribor, Slovenia; (G.H.); (M.P.); (Ž.K.)
- Correspondence:
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Lujerdean C, Baci GM, Cucu AA, Dezmirean DS. The Contribution of Silk Fibroin in Biomedical Engineering. INSECTS 2022; 13:286. [PMID: 35323584 PMCID: PMC8950689 DOI: 10.3390/insects13030286] [Citation(s) in RCA: 44] [Impact Index Per Article: 22.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/04/2022] [Revised: 03/07/2022] [Accepted: 03/10/2022] [Indexed: 02/06/2023]
Abstract
Silk fibroin (SF) is a natural protein (biopolymer) extracted from the cocoons of Bombyx mori L. (silkworm). It has many properties of interest in the field of biotechnology, the most important being biodegradability, biocompatibility and robust mechanical strength with high tensile strength. SF is usually dissolved in water-based solvents and can be easily reconstructed into a variety of material formats, including films, mats, hydrogels, and sponges, by various fabrication techniques (spin coating, electrospinning, freeze-drying, and physical or chemical crosslinking). Furthermore, SF is a feasible material used in many biomedical applications, including tissue engineering (3D scaffolds, wounds dressing), cancer therapy (mimicking the tumor microenvironment), controlled drug delivery (SF-based complexes), and bone, eye and skin regeneration. In this review, we describe the structure, composition, general properties, and structure-properties relationship of SF. In addition, the main methods used for ecological extraction and processing of SF that make it a green material are discussed. Lastly, technological advances in the use of SF-based materials are addressed, especially in healthcare applications such as tissue engineering and cancer therapeutics.
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Affiliation(s)
- Cristian Lujerdean
- Faculty of Animal Science and Biotechnology, University of Animal Sciences and Veterinary Medicine Cluj-Napoca, 400372 Cluj-Napoca, Romania; (A.-A.C.); (D.S.D.)
| | - Gabriela-Maria Baci
- Faculty of Animal Science and Biotechnology, University of Animal Sciences and Veterinary Medicine Cluj-Napoca, 400372 Cluj-Napoca, Romania; (A.-A.C.); (D.S.D.)
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11
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Effects of Grafting Degree on the Physicochemical Properties of Egg White Protein-Sodium Carboxymethylcellulose Conjugates and Their Aerogels. APPLIED SCIENCES-BASEL 2022. [DOI: 10.3390/app12042017] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
To improve the mechanical strength and oil-loading performances of egg white protein (EWP) aerogel, the effects of different grafting degrees on the modification of EWP by sodium carboxymethylcellulose (CMC-Na) were investigated. After different dry-heat treatment durations (0, 12, 24, 36, and 48 h), the EWP/CMC-Na conjugates with different grafting degrees (noted as EC0, EC12, EC24, EC36, and EC48, respectively) were obtained. Subsequently, the physicochemical properties of the conjugates, as well as the microstructure, mechanical properties, pore parameters, emulsification properties and oil-carrying properties of the conjugated aerogels, were characterized. The results showed that EC12 (with a grafting degree of 8.35%) aerogel possessed a uniform structure, the largest specific surface area, and the best emulsification performance. This facilitated a more robust aerogel (2.05 MPa) with nearly three times the mechanical strength of EWP aerogel. Moreover, this had a positive influence on the efficient loading and stable retention of oil. EC12 aerogel thus achieved an oil absorption capacity of 5.46 g/g aerogel and an oil holding capacity of 31.95%, and both values were nearly 1.7 times higher than those of EWP aerogel. In general, the EWP-based aerogel with a grafting degree of 8.35% had the best mechanical and oil-loading properties.
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12
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Abdullah, Zou Y, Farooq S, Walayat N, Zhang H, Faieta M, Pittia P, Huang Q. Bio-aerogels: Fabrication, properties and food applications. Crit Rev Food Sci Nutr 2022; 63:6687-6709. [PMID: 35156465 DOI: 10.1080/10408398.2022.2037504] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Traditional inorganic aerogels sustainability, biodegradability, and environmental safety concerns have driven researchers to find their safe green alternatives. Recently, interest in the application of bio-aerogels has rapidly increased in the food industry due to their unique characteristics such as high specific surface area and porosity, ultralow density, tunable pore size and morphology, and superior properties (physicochemical, mechanical, and functional). Bio-aerogels, a special category of highly porous unique materials, fabricated by the sol-gel method followed by drying processes, comprising three-dimensional networks of interconnected biopolymers (e.g., polysaccharides and proteins) with numerous air-filled pores. The production of bio-aerogels begins with the formation of a homogeneously dispersed precursor solution, followed by gelation and wet gel drying procedures by employing special drying techniques including atmospheric-, freeze-, and supercritical drying. Due to their special properties, bio-aerogels have emerged as sustainable biomaterial for many industrial applications, i.e., encapsulation and controlled delivery, active packaging, heavy metals separation, water and air filtration, oleogels, and biosensors. Bio-aerogels are low-cost, biocompatible, and biodegradable sustainable material that can be used in improving the processing, storage, transportation, and bioavailability of food additives, functional ingredients, and bioactive substances for their health benefits with enhanced shelf-life.
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Affiliation(s)
- Abdullah
- Guangdong Provincial Key Laboratory of Functional Food Active Substances, College of Food Science, South China Agricultural University, Guangzhou, China
| | - YuCheng Zou
- College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou, China
| | - Shahzad Farooq
- College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou, China
| | - Noman Walayat
- Department of Food Science and Engineering, College of Ocean, Zhejiang University of Technology, Hangzhou, China
| | - Hui Zhang
- College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou, China
- Zhejiang Key Laboratory for Agro-Food Processing, Zhejiang University, Hangzhou, China
- Ningbo Research Institute, Zhejiang University, Ningbo, China
| | - Marco Faieta
- Faculty of Bioscience and Technology for Food, Agriculture and Environment, University of Teramo, Teramo, Italy
| | - Paola Pittia
- Faculty of Bioscience and Technology for Food, Agriculture and Environment, University of Teramo, Teramo, Italy
| | - Qingrong Huang
- Department of Food Science, Rutgers University, New Brunswick, New Jersey, USA
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13
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CO2 induced gelation of amidated pectin solutions: Impact of viscosity and gel formation. Chem Eng Res Des 2022. [DOI: 10.1016/j.cherd.2022.02.012] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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14
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Double-layered adhesive microneedle bandage based on biofunctionalized mussel protein for cardiac tissue regeneration. Biomaterials 2021; 278:121171. [PMID: 34624751 DOI: 10.1016/j.biomaterials.2021.121171] [Citation(s) in RCA: 31] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2021] [Revised: 09/13/2021] [Accepted: 09/28/2021] [Indexed: 12/11/2022]
Abstract
Heart failure following myocardial infarction (MI), the primary cause of mortality worldwide, is the consequence of cardiomyocyte death or dysfunction. Clinical efforts involving the delivery of growth factors (GFs) and stem cells with the aim of regenerating cardiomyocytes for the recovery of structural and functional integrity have largely failed to deliver, mainly due to short half-lives and rapid clearance in in vivo environments. In this work, we selected and genetically fused four biofunctional peptides possessing angiogenic potential, originating from extracellular matrix proteins and GFs, to bioengineered mussel adhesive protein (MAP). We found that MAPs fused with vascular endothelial growth factor (VEGF)-derived peptide and fibronectin-derived RGD peptide significantly promoted the proliferation and migration of endothelial cells in vitro. Based on these characteristics, we fabricated advanced double-layered adhesive microneedle bandages (DL-AMNBs) consisting of a biofunctional MAP-based root and a regenerated silk fibroin (SF)-based tip, allowing homogeneous distribution of the regenerative factor via swellable microneedles. Our developed DL-AMNB system clearly demonstrated better preservation of cardiac muscle and regenerative effects on heart remodeling in a rat MI model, which might be attributed to the prolonged retention of therapeutic peptides as well as secure adhesion between the patch and host myocardium by MAP-inherent strong underwater adhesiveness.
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15
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Bernardes BG, Del Gaudio P, Alves P, Costa R, García-Gonzaléz CA, Oliveira AL. Bioaerogels: Promising Nanostructured Materials in Fluid Management, Healing and Regeneration of Wounds. Molecules 2021; 26:3834. [PMID: 34201789 PMCID: PMC8270285 DOI: 10.3390/molecules26133834] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2021] [Revised: 06/09/2021] [Accepted: 06/21/2021] [Indexed: 12/16/2022] Open
Abstract
Wounds affect one's quality of life and should be managed on a patient-specific approach, based on the particular healing phase and wound condition. During wound healing, exudate is produced as a natural response towards healing. However, excessive production can be detrimental, representing a challenge for wound management. The design and development of new healing devices and therapeutics with improved performance is a constant demand from the healthcare services. Aerogels can combine high porosity and low density with the adequate fluid interaction and drug loading capacity, to establish hemostasis and promote the healing and regeneration of exudative and chronic wounds. Bio-based aerogels, i.e., those produced from natural polymers, are particularly attractive since they encompass their intrinsic chemical properties and the physical features of their nanostructure. In this work, the emerging research on aerogels for wound treatment is reviewed for the first time. The current scenario and the opportunities provided by aerogels in the form of films, membranes and particles are identified to face current unmet demands in fluid managing and wound healing and regeneration.
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Affiliation(s)
- Beatriz G. Bernardes
- Universidade Católica Portuguesa, CBQF-Centro de Biotecnologia e Química Fina–Laboratório Associado, Escola Superior de Biotecnologia, Rua Diogo Botelho 1327, 4169-005 Porto, Portugal;
- Department of Pharmacology, Pharmacy and Pharmaceutical Technology, I+D Farma Group (GI-1645), Faculty of Pharmacy and Health Research Institute of Santiago de Compostela (IDIS), Universidade de Santiago de Compostela, E-15782 Santiago de Compostela, Spain
| | - Pasquale Del Gaudio
- Department of Pharmacy, University of Salerno, Via Giovanni Paolo II 132, I-84084 Fisciano, Italy;
| | - Paulo Alves
- Center for Interdisciplinary Research in Health, Institute of Health Sciences, Universidade Católica Portuguesa, Rua Diogo Botelho 1327, 4169-005 Porto, Portugal;
| | - Raquel Costa
- Instituto de Investigação e Inovação em Saúde, Universidade do Porto (i3S), 4200-135 Porto, Portugal
- Biochemistry Unit, Department of Biomedicine, Faculdade de Medicina, Universidade do Porto, 4200-319 Porto, Portugal
- Escola Superior de Saúde, Instituto Politécnico do Porto, 4200-072 Porto, Portugal
| | - Carlos A. García-Gonzaléz
- Department of Pharmacology, Pharmacy and Pharmaceutical Technology, I+D Farma Group (GI-1645), Faculty of Pharmacy and Health Research Institute of Santiago de Compostela (IDIS), Universidade de Santiago de Compostela, E-15782 Santiago de Compostela, Spain
| | - Ana Leite Oliveira
- Universidade Católica Portuguesa, CBQF-Centro de Biotecnologia e Química Fina–Laboratório Associado, Escola Superior de Biotecnologia, Rua Diogo Botelho 1327, 4169-005 Porto, Portugal;
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16
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Wemmer J, Malafronte L, Foschini S, Schneider A, Schlepütz CM, Leser ME, Michel M, Burbigde A, Windhab EJ. Fabrication of a Novel Protein Sponge with Dual-Scale Porosity and Mixed Wettability Using a Clean and Versatile Microwave-Based Process. MATERIALS 2021; 14:ma14092298. [PMID: 33946697 PMCID: PMC8124266 DOI: 10.3390/ma14092298] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/24/2021] [Revised: 04/22/2021] [Accepted: 04/26/2021] [Indexed: 01/10/2023]
Abstract
An open-porous protein sponge with mixed wettability is presented made entirely from whey proteins and with promising applications in biomedicine, pharmaceutical, and food industry. The fabrication relies on an additive-free, clean and scalable process consisting of foaming followed by controlled microwave-convection drying. Volumetric heating throughout the matrix induced by microwaves causes fast expansion and elongation of the foam bubbles, retards crust formation and promotes early protein denaturation. These effects counteract collapse and shrinkage typically encountered in convection drying of foams. The interplay of high protein content, tailored gas incorporation and controlled drying result in a dried structure with dual-scale porosity composed of open macroscopic elongated foam bubbles and microscopic pores in the surrounding solid lamellae induced by water evaporation. Due to the insolubility and mixed wettability of the denatured protein network, polar and non-polar liquids are rapidly absorbed into the interconnected capillary system of the sponge without disintegrating. While non-watery liquids penetrate the pores by capillary suction, water diffuses also into the stiff protein matrix, inducing swelling and softening. Consequently, the water-filled soft sponge can be emptied by compression and re-absorbs any wetting liquid into the free capillary space.
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Affiliation(s)
- Judith Wemmer
- Laboratory of Food Process Engineering, Institute of Food, Nutrition and Health, ETH Zurich, Schmelzbergstrasse 9, 8092 Zurich, Switzerland; (J.W.); (S.F.); (A.S.)
| | - Loredana Malafronte
- Laboratory of Food Process Engineering, Institute of Food, Nutrition and Health, ETH Zurich, Schmelzbergstrasse 9, 8092 Zurich, Switzerland; (J.W.); (S.F.); (A.S.)
- Correspondence: (L.M.); (E.J.W.)
| | - Socrates Foschini
- Laboratory of Food Process Engineering, Institute of Food, Nutrition and Health, ETH Zurich, Schmelzbergstrasse 9, 8092 Zurich, Switzerland; (J.W.); (S.F.); (A.S.)
| | - Aline Schneider
- Laboratory of Food Process Engineering, Institute of Food, Nutrition and Health, ETH Zurich, Schmelzbergstrasse 9, 8092 Zurich, Switzerland; (J.W.); (S.F.); (A.S.)
| | | | - Martin E. Leser
- Société des Produits Nestlé S.A.,Nestlé Research, Route du Jorat 57, 1000 Lausanne, Switzerland; (M.E.L.); (M.M.); (A.B.)
| | - Martin Michel
- Société des Produits Nestlé S.A.,Nestlé Research, Route du Jorat 57, 1000 Lausanne, Switzerland; (M.E.L.); (M.M.); (A.B.)
| | - Adam Burbigde
- Société des Produits Nestlé S.A.,Nestlé Research, Route du Jorat 57, 1000 Lausanne, Switzerland; (M.E.L.); (M.M.); (A.B.)
| | - Erich J. Windhab
- Laboratory of Food Process Engineering, Institute of Food, Nutrition and Health, ETH Zurich, Schmelzbergstrasse 9, 8092 Zurich, Switzerland; (J.W.); (S.F.); (A.S.)
- Correspondence: (L.M.); (E.J.W.)
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17
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Xie X, Zheng Z, Wang X, Lee Kaplan D. Low-Density Silk Nanofibrous Aerogels: Fabrication and Applications in Air Filtration and Oil/Water Purification. ACS NANO 2021; 15:1048-1058. [PMID: 33439624 DOI: 10.1021/acsnano.0c07896] [Citation(s) in RCA: 34] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
A method was developed to fabricate light, water-insoluble silk fibroin nanofibrous aerogels (SNFAs) through solvent welding of lyophilized silk nanofibrous 3D networks at the junction points while converting silk structures from random-coils to β-sheets (water insoluble). Aromatic alcohols, especially phenethyl alcohol (PEA), supported robust solvent welding and the structural conversion of silk. PEA vapor treatment was a better approach than solvent infusion to retain volume, density, and mechanical strength of the SNFAs. The mechanical properties of highly orientated SNFAs were superior to randomly distributed fibers. The SNFAs had a low density (3.5 mg/cm3), high hydrophobicity (140.9°), and a porous surface morphology on the individual nanofibers, resulting in high efficiency and selectivity for absorbing particulate matter and oils. Compared with commonly used inorganic aerogels, the SNFAs developed in this study are biocompatible, easily functionalized, environmentally friendly, and low-cost and therefore have potential for air and water purification, biosensors, drug delivery, and tissue engineering.
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Affiliation(s)
- Xusheng Xie
- National Engineering Laboratory for Modern Silk, Soochow University, 199 Renai Road, Suzhou Industrial Park, Suzhou, Jiangsu Province 215123, P.R. China
| | - Zhaozhu Zheng
- National Engineering Laboratory for Modern Silk, Soochow University, 199 Renai Road, Suzhou Industrial Park, Suzhou, Jiangsu Province 215123, P.R. China
| | - Xiaoqin Wang
- National Engineering Laboratory for Modern Silk, Soochow University, 199 Renai Road, Suzhou Industrial Park, Suzhou, Jiangsu Province 215123, P.R. China
| | - David Lee Kaplan
- Department of Biomedical Engineering, Tufts University, Medford, Massachusetts 02155, United States
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18
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Guastaferro M, Reverchon E, Baldino L. Agarose, Alginate and Chitosan Nanostructured Aerogels for Pharmaceutical Applications: A Short Review. Front Bioeng Biotechnol 2021; 9:688477. [PMID: 34055766 PMCID: PMC8149959 DOI: 10.3389/fbioe.2021.688477] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2021] [Accepted: 04/20/2021] [Indexed: 01/16/2023] Open
Abstract
In this short review, drug delivery systems, formed by polysaccharide-based (i.e., agarose, alginate, and chitosan) aerogels, are analyzed. In particular, the main papers, published in the period 2011-2020 in this research field, have been investigated and critically discussed, in order to highlight strengths and weaknesses of the traditional production techniques (e.g., freeze-drying and air evaporation) of bio-aerogels with respect to supercritical CO2 assisted drying. Supercritical CO2 assisted drying demonstrated to be a promising technique to produce nanostructured bio-aerogels that maintain the starting gel volume and shape, when the solvent removal occurs at negligible surface tension. This characteristic, coupled with the possibility of removing also cross-linking agent residues from the aerogels, makes these advanced devices safe and suitable as carriers for controlled drug delivery applications.
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19
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Kumar SSD, Abrahamse H. Advancement of Nanobiomaterials to Deliver Natural Compounds for Tissue Engineering Applications. Int J Mol Sci 2020; 21:E6752. [PMID: 32942542 PMCID: PMC7555266 DOI: 10.3390/ijms21186752] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2020] [Revised: 09/01/2020] [Accepted: 09/04/2020] [Indexed: 12/21/2022] Open
Abstract
Recent advancement in nanotechnology has provided a wide range of benefits in the biological sciences, especially in the field of tissue engineering and wound healing. Nanotechnology provides an easy process for designing nanocarrier-based biomaterials for the purpose and specific needs of tissue engineering applications. Naturally available medicinal compounds have unique clinical benefits, which can be incorporated into nanobiomaterials and enhance their applications in tissue engineering. The choice of using natural compounds in tissue engineering improves treatment modalities and can deal with side effects associated with synthetic drugs. In this review article, we focus on advances in the use of nanobiomaterials to deliver naturally available medicinal compounds for tissue engineering application, including the types of biomaterials, the potential role of nanocarriers, and the various effects of naturally available medicinal compounds incorporated scaffolds in tissue engineering.
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Affiliation(s)
| | - Heidi Abrahamse
- Laser Research Centre, Faculty of Health Sciences, University of Johannesburg, Johannesburg 2028, South Africa;
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20
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In Situ Measurement Methods for the CO 2-Induced Gelation of Biopolymer Systems. Gels 2020; 6:gels6030028. [PMID: 32916912 PMCID: PMC7559909 DOI: 10.3390/gels6030028] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2020] [Revised: 09/03/2020] [Accepted: 09/04/2020] [Indexed: 11/17/2022] Open
Abstract
This work presents two novel methods to investigate in situ the carbon dioxide (CO2)-induced gelation of biopolymer-based solutions. The CO2-induced gelation is performed in a viewing cell at room temperature under CO2 pressure (20 to 60 bar), whereby calcium precursors are used as cross-linkers. The novel methods allow the in situ optical observation and evaluation of the gelation process via the change in turbidity due to dissolution of dispersed calcium carbonate (CaCO3) particles and in situ pH measurements. The combination of both methods enables the determination of the gelation direction, gelation rate, and the pH value in spatial and temporal resolution. The optical gelation front and pH front both propagate equally from top to bottom through the sample solutions, indicating a direct link between a decrease in the pH value and the dissolution of the CaCO3 particles. Close-to-vertical movement of both gelation front and pH front suggests almost one dimensional diffusion of CO2 from the contact surface (gel–CO2) to the bottom of the sample. The gelation rate increases with the increase in CO2 pressure. However, the increase in solution viscosity and the formation of a gel layer result in a strong decrease in the gelation rate due to a hindrance of CO2 diffusion. Released carbonate ions from CaCO3 dissolution directly influence the reaction equilibrium between CO2 and water and therefore the change in pH value of the solution. Increasing the CaCO3 concentrations up to the solubility results in lower gelation rates.
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21
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New Trends in Bio-Based Aerogels. Pharmaceutics 2020; 12:pharmaceutics12050449. [PMID: 32414217 PMCID: PMC7284463 DOI: 10.3390/pharmaceutics12050449] [Citation(s) in RCA: 67] [Impact Index Per Article: 16.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2020] [Revised: 04/27/2020] [Accepted: 05/11/2020] [Indexed: 01/16/2023] Open
Abstract
(1) Background: The fascinating properties of currently synthesized aerogels associated with the flexible approach of sol-gel chemistry play an important role in the emergence of special biomedical applications. Although it is increasingly known and mentioned, the potential of aerogels in the medical field is not sufficiently explored. Interest in aerogels has increased greatly in recent decades due to their special properties, such as high surface area, excellent thermal and acoustic properties, low density and thermal conductivity, high porosity, flame resistance and humidity, and low refractive index and dielectric constant. On the other hand, high manufacturing costs and poor mechanical strength limit the growth of the market. (2) Results: In this paper, we analyze more than 180 articles from recent literature studies focused on the dynamics of aerogels research to summarize the technologies used in manufacturing and the properties of materials based on natural polymers from renewable sources. Biomedical applications of these bio-based materials are also introduced. (3) Conclusions: Due to their complementary functionalities (bioactivity, biocompatibility, biodegradability, and unique chemistry), bio-based materials provide a vast capability for utilization in the field of interdisciplinary and multidisciplinary scientific research.
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22
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Yang H, Wang Z, Wang M, Li C. Structure and properties of silk fibroin aerogels prepared by non-alkali degumming process. POLYMER 2020. [DOI: 10.1016/j.polymer.2020.122298] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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23
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Phan NV, Wright T, Rahman MM, Xu J, Coburn JM. In Vitro Biocompatibility of Decellularized Cultured Plant Cell-Derived Matrices. ACS Biomater Sci Eng 2020; 6:822-832. [PMID: 33464854 DOI: 10.1021/acsbiomaterials.9b00870] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
There has been a recent increase in exploring the use of decellularized plant tissue as a novel "green" material for biomedical applications. As part of this effort, we have developed a technique to decellularize cultured plant cells (tobacco BY-2 cells and rice cells) and tissue (tobacco hairy roots) that uses deoxyribonuclease I (DNase I)). As a proof of concept, all cultured plant cells and tissue were transformed to express recombinant enhanced green fluorescent protein (EGFP) to show that the proteins of interest could be retained within the matrices. Decellularization of lyophilized tobacco BY-2 cells with DNase for 30 min depleted the DNA content from 1503 ± 459 to 31 ± 5 ng/sample. The decellularization procedure resulted in approximately 36% total protein retention (154 ± 60 vs 424 ± 70 μg/sample) and 33% EGFP retention. Similar results for DNA removal and protein retention were observed with the rice cells and tobacco hairy root matrices. When exposed to decellularized BY-2 cell-derived matrices, monolayer cultures of human foreskin fibroblasts (hFFs) maintained or increased metabolic activity, which is an indicator of cell viability. Furthermore, hFFs were able to attach, spread, and proliferate when cultured with the decellularized BY-2 cell-derived matrices in an aggregate model. Overall, these studies demonstrate that cultured plant cells and tissue can be effectively decellularized with DNase I with substantial protein retention. The resulting material has a positive impact on hFF metabolic activity and could be employed to create a three-dimensional environment for cell growth. These results thus show the promise of using naturally derived cellulose matrices from cultured plant cells and tissues for biomedical applications.
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Affiliation(s)
- Nhi V Phan
- Department of Biomedical Engineering, Worcester Polytechnic Institute, Worcester, Massachusetts 01609-2280, United States
| | - Tristen Wright
- Department of Biological Science, Arkansas State University, Jonesboro, Arkansas 72401, United States
| | - M Masrur Rahman
- Department of Biomedical Engineering, Worcester Polytechnic Institute, Worcester, Massachusetts 01609-2280, United States
| | - Jianfeng Xu
- Arkansas Biosciences Institute, Arkansas State University, Jonesboro, Arkansas 72401, United States.,College of Agriculture, Arkansas State University, Jonesboro, Arkansas 72401, United States
| | - Jeannine M Coburn
- Department of Biomedical Engineering, Worcester Polytechnic Institute, Worcester, Massachusetts 01609-2280, United States
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24
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Cardea S, De Marco I. Cellulose Acetate and Supercritical Carbon Dioxide: Membranes, Nanoparticles, Microparticles and Nanostructured Filaments. Polymers (Basel) 2020; 12:polym12010162. [PMID: 31936324 PMCID: PMC7023498 DOI: 10.3390/polym12010162] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2019] [Revised: 01/05/2020] [Accepted: 01/06/2020] [Indexed: 01/18/2023] Open
Abstract
Cellulose acetate (CA) is a very versatile biocompatible polymer used in various industrial sectors. Therefore, depending on the application, different morphologies are required. Different processes at industrial scale are commonly employed to obtain CA micro or nanoparticles (discontinuous structures) or CA membranes (continuous structures with discontinuities). In this work, two supercritical carbon dioxide (scCO2) based techniques, such as the semi-continuous supercritical antisolvent process (SAS) and the supercritical fluid phase inversion process, in which scCO2 plays the role of antisolvent, were employed. Varying the kind of organic solvent used to prepare the polymeric solution, the polymer concentration, and operating pressure and temperature, it was possible to tune the characteristics of the obtained material. In particular, using acetone as the organic solvent, filaments constituted by nanoparticles, expanded microparticles, nanoparticles with a mean diameter lower than 80 nm, and microporous membranes were obtained, varying the operating conditions. The attainment of spherical micron-sized particles was instead achieved using a mixture of acetone and DMSO as the organic solvent. Therefore, the versatility of the supercritical carbon dioxide-based techniques has been confirmed, and it was possible to obtain, using a single experimental plant, various morphologies of cellulose acetate (with controllable particles' or pores' diameters) by varying the operating conditions.
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25
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Liu S, Zhou C, Mou S, Li J, Zhou M, Zeng Y, Luo C, Sun J, Wang Z, Xu W. Biocompatible graphene oxide–collagen composite aerogel for enhanced stiffness and in situ bone regeneration. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2019; 105:110137. [DOI: 10.1016/j.msec.2019.110137] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/12/2019] [Revised: 08/06/2019] [Accepted: 08/25/2019] [Indexed: 12/21/2022]
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26
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Yang H, Wang Z, Liu Z, Cheng H, Li C. Continuous, Strong, Porous Silk Firoin-Based Aerogel Fibers toward Textile Thermal Insulation. Polymers (Basel) 2019; 11:polym11111899. [PMID: 31752126 PMCID: PMC6918396 DOI: 10.3390/polym11111899] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2019] [Revised: 10/16/2019] [Accepted: 11/14/2019] [Indexed: 11/30/2022] Open
Abstract
Aerogel fiber, with the characteristics of ultra-low density, ultra-high porosity, and high specific surface area, is the most potential candidate for manufacturing wearable thermal insulation material. However, aerogel fibers generally show weak mechanical properties and complex preparation processes. Herein, through firstly preparing a cellulose acetate/polyacrylic acid (CA/PAA) hollow fiber using coaxial wet-spinning followed by injecting the silk fibroin (SF) solution into the hollow fiber, the CA/PAA-wrapped SF aerogel fibers toward textile thermal insulation were successfully constructed after freeze-drying. The sheath (CA/PAA hollow fiber) possesses a multiscale porous structure, including micropores (11.37 ± 4.01 μm), sub-micron pores (217.47 ± 46.16 nm), as well as nanopores on the inner (44.00 ± 21.65 nm) and outer (36.43 ± 17.55 nm) surfaces, which is crucial to the formation of a SF aerogel core. Furthermore, the porous CA/PAA-wrapped SF aerogel fibers have many advantages, such as low density (0.21 g/cm3), high porosity (86%), high strength at break (2.6 ± 0.4 MPa), as well as potential continuous and large-scale production. The delicate structure of multiscale porous sheath and ultra-low-density SF aerogel core synergistically inhibit air circulation and limit convective heat transfer. Meanwhile, the high porosity of aerogel fibers weakens heat transfer and the SF aerogel cellular walls prevent infrared radiation. The results show that the mat composed of these aerogel fibers exhibits excellent thermal insulating properties with a wide working temperature from −20 to 100 °C. Therefore, this SF-based aerogel fiber can be considered as a practical option for high performance thermal insulation.
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Affiliation(s)
- Haiwei Yang
- School of Textile and Garment, Anhui Polytechnic University, Wuhu 241000, China; (H.Y.); (H.C.); (C.L.)
| | - Zongqian Wang
- School of Textile and Garment, Anhui Polytechnic University, Wuhu 241000, China; (H.Y.); (H.C.); (C.L.)
- Correspondence: (Z.W.); (Z.L.)
| | - Zhi Liu
- School of Textile and Garment, Anhui Polytechnic University, Wuhu 241000, China; (H.Y.); (H.C.); (C.L.)
- CECT Wuhu Diamond Aircraft Manufacture Co., LTD., Wuhu 241000, China
- Correspondence: (Z.W.); (Z.L.)
| | - Huan Cheng
- School of Textile and Garment, Anhui Polytechnic University, Wuhu 241000, China; (H.Y.); (H.C.); (C.L.)
| | - Changlong Li
- School of Textile and Garment, Anhui Polytechnic University, Wuhu 241000, China; (H.Y.); (H.C.); (C.L.)
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27
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Affiliation(s)
- Aleksei Solomonov
- Department of Materials and Interfaces Weizmann Institute of Science 7610001 Rehovot Israel
| | - Ulyana Shimanovich
- Department of Materials and Interfaces Weizmann Institute of Science 7610001 Rehovot Israel
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28
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Jeon EY, Lee J, Kim BJ, Joo KI, Kim KH, Lim G, Cha HJ. Bio-inspired swellable hydrogel-forming double-layered adhesive microneedle protein patch for regenerative internal/external surgical closure. Biomaterials 2019; 222:119439. [PMID: 31465886 DOI: 10.1016/j.biomaterials.2019.119439] [Citation(s) in RCA: 69] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2019] [Revised: 08/17/2019] [Accepted: 08/17/2019] [Indexed: 12/21/2022]
Abstract
Significant tissue damage, scarring, and an intense inflammatory response remain the greatest concerns for conventional wound closure options, including sutures and staples. In particular, wound closure in internal organs poses major clinical challenges due to air/fluid leakage, local ischemia, and subsequent impairment of healing. Herein, to overcome these limitations, inspired by endoparasites that swell their proboscis to anchor to host's intestines, we developed a hydrogel-forming double-layered adhesive microneedle (MN) patch consisting of a swellable mussel adhesive protein (MAP)-based shell and a non-swellable silk fibroin (SF)-based core. By possessing tissue insertion capability (7-times greater than the force for porcine skin penetration), MAP-derived surface adhesion, and selective swelling-mediated physical entanglement, our hydrogel-forming adhesive MN patch achieved ex vivo superior wound sealing capacity against luminal leaks (139.7 ± 14.1 mmHg), which was comparable to suture (151.0 ± 23.3 mmHg), as well as in vivo excellent performance for wet and/or dynamic external and internal tissues. Collectively, our bioinspired adhesive MN patch can be successfully used in diverse practical applications ranging from vascular and gastrointestinal wound healing to transdermal delivery for pro-regenerative or anti-inflammatory agents to target tissues.
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Affiliation(s)
- Eun Young Jeon
- Department of Chemical Engineering, Pohang University of Science and Technology, Pohang, 37673, South Korea
| | - Jungho Lee
- Department of Mechanical Engineering, Pohang University of Science and Technology, Pohang, 37673, South Korea
| | - Bum Ju Kim
- Department of Mechanical Engineering, Pohang University of Science and Technology, Pohang, 37673, South Korea
| | - Kye Il Joo
- Department of Chemical Engineering, Pohang University of Science and Technology, Pohang, 37673, South Korea
| | - Ki Hean Kim
- Department of Mechanical Engineering, Pohang University of Science and Technology, Pohang, 37673, South Korea
| | - Geunbae Lim
- Department of Mechanical Engineering, Pohang University of Science and Technology, Pohang, 37673, South Korea.
| | - Hyung Joon Cha
- Department of Chemical Engineering, Pohang University of Science and Technology, Pohang, 37673, South Korea.
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Maleki H, Shahbazi MA, Montes S, Hosseini SH, Eskandari MR, Zaunschirm S, Verwanger T, Mathur S, Milow B, Krammer B, Hüsing N. Mechanically Strong Silica-Silk Fibroin Bioaerogel: A Hybrid Scaffold with Ordered Honeycomb Micromorphology and Multiscale Porosity for Bone Regeneration. ACS APPLIED MATERIALS & INTERFACES 2019; 11:17256-17269. [PMID: 31013056 DOI: 10.1021/acsami.9b04283] [Citation(s) in RCA: 66] [Impact Index Per Article: 13.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
Due to the synergic feature of individual components in hybrid (nano)biomaterials, their application in regenerative medicine has drawn significant attention. Aiming to address all the current challenges of aerogel as a potent scaffold in bone tissue engineering application, we adopted a novel synthesis approach to synergistically improve the pore size regime and mechanical strength in the aerogel. The three-dimensional aerogel scaffold in this study has been synthesized through a versatile one-pot aqueous-based sol-gel hybridization/assembly of organosilane (tetraethyl orthosilicate) and silk fibroin (SF) biopolymer, followed by unidirectional freeze-casting of the as-prepared hybrid gel and supercritical drying. The developed ultralight silica-SF aerogel hybrids demonstrated a hierarchically organized porous structure with interesting honeycomb-shaped micromorphology and microstructural alignment (anisotropy) in varied length scales. The average macropore size of the hybrid aerogel lied in ∼0.5-18 μm and was systematically controlled with freeze-casting conditions. Together with high porosity (91-94%), high Young's modulus (∼4-7 MPa, >3 order of magnitude improvement compared to their pristine aerogel counterparts), and bone-type anisotropy in the mechanical compressive behavior, the silica-SF hybrid aerogel of this study acted as a very competent scaffold for bone tissue formation. The results of in vitro assessments revealed that the silica-SF aerogel is not only cytocompatible and nonhemolytic but also acted as an open porous microenvironment to trigger osteoblast cell attachment, growth, and proliferation on its surface within 14 days of incubation. Moreover, to support the in vitro results, in vivo bone formation within the aerogel implant in the bone defect site was studied. The X-ray radiology and microcomputed tomography analyses confirmed that a significant new bone tissue density formed in the defect site within 25 days of implantation. Also, in vivo toxicology studies showed a zero-toxic impact of the aerogel implant on the blood biochemical and hematological parameters. Finally, the study clearly shows the potential of aerogel as a bioactive and osteoconductive open porous cellular matrix for a successful osseointegration process.
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Affiliation(s)
- Hajar Maleki
- Institute of Inorganic Chemistry, Department of Chemistry , University of Cologne , Greinstraße 6 , 50939 Cologne , Germany
| | - Mohammad-Ali Shahbazi
- Department of Micro- and Nanotechnology , Technical University of Denmark , DK-2800 Kgs Lyngby , Denmark
| | - Susan Montes
- Department of Chemistry and Physics of Materials , Paris-Lodron University of Salzburg , Jakob-Haringerstr. 2A , 5020 Salzburg , Austria
| | - Seyed Hojjat Hosseini
- Department of Pharmacology, School of Medicine , Zanjan University of Medical Sciences , 45139-56111 Zanjan , Iran
| | | | - Stefan Zaunschirm
- University of Applied Sciences Upper Austria , Franz-Fritsch-Straße 11 , 4600 Wels , Austria
| | - Thomas Verwanger
- Department of Biosciences , Paris-Lodron University of Salzburg , Hellbrunnerstr. 34 , 5020 Salzburg , Austria
| | - Sanjay Mathur
- Institute of Inorganic Chemistry, Department of Chemistry , University of Cologne , Greinstraße 6 , 50939 Cologne , Germany
| | - Barbara Milow
- Institute of Inorganic Chemistry, Department of Chemistry , University of Cologne , Greinstraße 6 , 50939 Cologne , Germany
- Department of Aerogels and Aerogel Composites , Institute of Materials Research, German Aerospace Center (DLR) , Linder Höhe , 51147 Cologne , Germany
| | - Barbara Krammer
- University of Applied Sciences Upper Austria , Franz-Fritsch-Straße 11 , 4600 Wels , Austria
| | - Nicola Hüsing
- Department of Chemistry and Physics of Materials , Paris-Lodron University of Salzburg , Jakob-Haringerstr. 2A , 5020 Salzburg , Austria
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Goimil L, Santos-Rosales V, Delgado A, Évora C, Reyes R, Lozano-Pérez AA, Aznar-Cervantes SD, Cenis JL, Gómez-Amoza JL, Concheiro A, Alvarez-Lorenzo C, García-González CA. scCO2-foamed silk fibroin aerogel/poly(ε-caprolactone) scaffolds containing dexamethasone for bone regeneration. J CO2 UTIL 2019. [DOI: 10.1016/j.jcou.2019.02.016] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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Barrios E, Fox D, Li Sip YY, Catarata R, Calderon JE, Azim N, Afrin S, Zhang Z, Zhai L. Nanomaterials in Advanced, High-Performance Aerogel Composites: A Review. Polymers (Basel) 2019; 11:E726. [PMID: 31010008 PMCID: PMC6523290 DOI: 10.3390/polym11040726] [Citation(s) in RCA: 55] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2019] [Revised: 04/16/2019] [Accepted: 04/16/2019] [Indexed: 12/25/2022] Open
Abstract
Aerogels are one of the most interesting materials of the 21st century owing to their high porosity, low density, and large available surface area. Historically, aerogels have been used for highly efficient insulation and niche applications, such as interstellar particle capture. Recently, aerogels have made their way into the composite universe. By coupling nanomaterial with a variety of matrix materials, lightweight, high-performance composite aerogels have been developed for applications ranging from lithium-ion batteries to tissue engineering materials. In this paper, the current status of aerogel composites based on nanomaterials is reviewed and their application in environmental remediation, energy storage, controlled drug delivery, tissue engineering, and biosensing are discussed.
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Affiliation(s)
- Elizabeth Barrios
- NanoScience Technology Center, University of Central Florida, Orlando, FL 32826, USA.
- Department of Materials Science and Engineering, University of Central Florida, Orlando, FL 32816, USA.
| | - David Fox
- NanoScience Technology Center, University of Central Florida, Orlando, FL 32826, USA.
- Department of Chemistry, University of Central Florida, Orlando, FL 32816, USA.
| | - Yuen Yee Li Sip
- NanoScience Technology Center, University of Central Florida, Orlando, FL 32826, USA.
| | - Ruginn Catarata
- NanoScience Technology Center, University of Central Florida, Orlando, FL 32826, USA.
| | - Jean E Calderon
- NanoScience Technology Center, University of Central Florida, Orlando, FL 32826, USA.
| | - Nilab Azim
- NanoScience Technology Center, University of Central Florida, Orlando, FL 32826, USA.
- Department of Chemistry, University of Central Florida, Orlando, FL 32816, USA.
| | - Sajia Afrin
- NanoScience Technology Center, University of Central Florida, Orlando, FL 32826, USA.
- Department of Chemistry, University of Central Florida, Orlando, FL 32816, USA.
| | - Zeyang Zhang
- Department of Chemistry, University of Central Florida, Orlando, FL 32816, USA.
| | - Lei Zhai
- NanoScience Technology Center, University of Central Florida, Orlando, FL 32826, USA.
- Department of Materials Science and Engineering, University of Central Florida, Orlando, FL 32816, USA.
- Department of Chemistry, University of Central Florida, Orlando, FL 32816, USA.
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Zubair NA, Abouzari-Lotf E, Mahmoud Nasef M, Abdullah EC. Aerogel-based materials for adsorbent applications in material domains. E3S WEB OF CONFERENCES 2019; 90:01003. [DOI: 10.1051/e3sconf/20199001003] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/02/2023]
Abstract
Aerogels are considered to be promising materials in various applications due to their exclusive properties. Over the last decades, the potential of organic, inorganic, or hybrid aerogels has been practically exploited in different fields of use. Some aerogel compositions have been patented recently but their application in the area of adsorption remains limited. This review intends to discuss the potential of aerogels as adsorbents, which is summarised from the more recent progressive research and their capabilities. Furthermore, the potential of aerogels as viable absorbents for environmental remediation is also discussed. After a short introduction covering the aerogel properties, preparation procedures, and their possible classification options, the review is structured based on their possible use as adsorbents.
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Maleki H, Whitmore L, Hüsing N. Novel multifunctional polymethylsilsesquioxane-silk fibroin aerogel hybrids for environmental and thermal insulation applications. JOURNAL OF MATERIALS CHEMISTRY. A 2018; 6:12598-12612. [PMID: 30713688 PMCID: PMC6333272 DOI: 10.1039/c8ta02821d] [Citation(s) in RCA: 56] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/27/2018] [Accepted: 06/08/2018] [Indexed: 05/16/2023]
Abstract
The development of aerogels with improved mechanical properties, to expand their utility in high-performance applications, is still a big challenge. Besides fossil-fuel based polymers that have been extensively utilized as platforms to enhance the mechanical strength of silsesquioxane and silica-based aerogels, using green biopolymers from various sustainable renewable resources are currently drawing significant attention. In this work, we process silk fibroin (SF) proteins, extracted from silkworm cocoons, with organically substituted alkoxysilanes in an entirely aqueous based solution via a successive sol-gel approach, and show for the first time that it is possible to produce homogeneous interpenetrated (IPN) polymethylsilsesquioxane (PMSQ)-SF hybrid aerogel monoliths with significantly improved mechanical properties. Emphasis is given to an improvement of the molecular interaction of the two components (SF biopolymer and PMSQ) using a silane coupling agent and to the design of pore structure. We succeeded in developing a novel class of compressible, light-weight, and hierarchically organized meso-macroporous PMSQ-SF IPN hybrid aerogels by carefully controlling the sol-gel parameters at a molecular level. Typically, these aerogels have a compressive strength (δ max) of up to 14 MPa, together with high flexibility in both compression and bending, compressibility up to 80% strain with very low bulk density (ρ b) of 0.08-0.23 g cm-3. By considering these promising properties, the superhydrophobic/oleophilic PMSQ-SF aerogel hybrids exhibited a high competency for selective absorption of a variety of organic pollutants (absorption capacities ∼500-2600 g g-1 %) from water and acted as a high-performance filter for continuous water/oil separation. Moreover, they have demonstrated impressive thermal insulation performance (λ = 0.032-0.044 W m-1 K-1) with excellent fire retardancy and self-extinguishing capabilities. Therefore, the PMSQ-SF aerogel hybrids would be a new class of open porous material and are expected to further extend the practical applications of this class of porous compounds.
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Affiliation(s)
- Hajar Maleki
- Chemistry and Physics of Materials , Paris-Lodron University Salzburg , Jakob-Haringer-Strasse 2a , 5020 , Salzburg , Austria .
| | - Lawrence Whitmore
- Chemistry and Physics of Materials , Paris-Lodron University Salzburg , Jakob-Haringer-Strasse 2a , 5020 , Salzburg , Austria .
| | - Nicola Hüsing
- Chemistry and Physics of Materials , Paris-Lodron University Salzburg , Jakob-Haringer-Strasse 2a , 5020 , Salzburg , Austria .
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Fabrication of 3D Self-Assembled Nonmulberry Antheraea Mylitta (tasar) Fibroin Nonwoven Mats for Wound Dressing Applications. Macromol Res 2018. [DOI: 10.1007/s13233-018-6121-1] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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Maleki H, Montes S, Hayati-Roodbari N, Putz F, Huesing N. Compressible, Thermally Insulating, and Fire Retardant Aerogels through Self-Assembling Silk Fibroin Biopolymers Inside a Silica Structure-An Approach towards 3D Printing of Aerogels. ACS APPLIED MATERIALS & INTERFACES 2018; 10:22718-22730. [PMID: 29864277 PMCID: PMC6513757 DOI: 10.1021/acsami.8b05856] [Citation(s) in RCA: 58] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
Thanks to the exceptional materials properties of silica aerogels, this fascinating highly porous material has found high-performance and real-life applications in various modern industries. However, a requirement for a broadening of these applications is based on the further improvement of the aerogel properties, especially with regard to mechanical strength and postsynthesis processability with minimum compromise to the other physical properties. Here, we report an entirely novel, simple, and aqueous-based synthesis approach to prepare mechanically robust aerogel hybrids by cogelation of silk fibroin (SF) biopolymer extracted from silkworm cocoons. The synthesis is based on sequential processes of acid catalyzed (physical) cross-linking of the SF biopolymer and simultaneous polycondensation of tetramethylorthosilicate (TMOS) in the presence of 5-(trimethoxysilyl)pentanoic acid (TMSPA) as a coupling agent and subsequent solvent exchange and supercritical drying. Extensive characterization by solid-state 1H NMR, 29Si NMR, and 2D 1H-29Si heteronuclear correlation (HETCOR) MAS NMR spectroscopy as well as various microscopic techniques (SEM, TEM) and mechanical assessment confirmed the molecular-level homogeneity of the hybrid nanostructure. The developed silica-SF aerogel hybrids contained an improved set of material properties, such as low density (ρb,average = 0.11-0.2 g cm-3), high porosity (∼90%), high specific surface area (∼400-800 m2 g-1), and excellent flexibility in compression (up to 80% of strain) with three orders of magnitude improvement in the Young's modulus over that of pristine silica aerogels. In addition, the silica-SF hybrid aerogels are fire retardant and demonstrated excellent thermal insulation performance with thermal conductivities (λ) of 0.033-0.039 W m-1 K-1. As a further advantage, the formulated hybrid silica-SF aerogel showed an excellent printability in the wet state using a microextrusion-based 3D printing approach. The printed structures had comparable properties to their monolith counterparts, improving postsynthesis processing or shaping of the silica aerogels significantly. Finally, the hybrid silica-SF aerogels reported here represent significant progress for a mechanically customized and robust aerogel for multipurpose applications, namely, as a customized thermal insulation material or as a dual porous open-cell biomaterial used in regenerative medicine.
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36
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Zhao S, Malfait WJ, Guerrero-Alburquerque N, Koebel MM, Nyström G. Biopolymer-Aerogele und -Schäume: Chemie, Eigenschaften und Anwendungen. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201709014] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Shanyu Zhao
- Building Energy Materials & Components; Eidgenössische Materialprüfungs- und Forschungsanstalt (Empa); Überlandstrasse 129 CH-8600 Dübendorf Schweiz
| | - Wim J. Malfait
- Building Energy Materials & Components; Eidgenössische Materialprüfungs- und Forschungsanstalt (Empa); Überlandstrasse 129 CH-8600 Dübendorf Schweiz
| | - Natalia Guerrero-Alburquerque
- Building Energy Materials & Components; Eidgenössische Materialprüfungs- und Forschungsanstalt (Empa); Überlandstrasse 129 CH-8600 Dübendorf Schweiz
| | - Matthias M. Koebel
- Building Energy Materials & Components; Eidgenössische Materialprüfungs- und Forschungsanstalt (Empa); Überlandstrasse 129 CH-8600 Dübendorf Schweiz
| | - Gustav Nyström
- Angewandte Holzforschung; Eidgenössische Materialprüfungs- und Forschungsanstalt (Empa); Überlandstrasse 129 CH-8600 Dübendorf Schweiz
- Departement Gesundheitswissenschaften und Technologie; ETH Zürich; Schmelzbergstrasse 9 CH-8092 Zürich Schweiz
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37
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Zhao S, Malfait WJ, Guerrero-Alburquerque N, Koebel MM, Nyström G. Biopolymer Aerogels and Foams: Chemistry, Properties, and Applications. Angew Chem Int Ed Engl 2018; 57:7580-7608. [DOI: 10.1002/anie.201709014] [Citation(s) in RCA: 336] [Impact Index Per Article: 56.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2017] [Indexed: 12/21/2022]
Affiliation(s)
- Shanyu Zhao
- Building Energy Materials & Components Laboratory; Swiss Federal Laboratories for Materials Science and Technology (Empa); Überlandstrasse 129 CH-8600 Dübendorf Switzerland
| | - Wim J. Malfait
- Building Energy Materials & Components Laboratory; Swiss Federal Laboratories for Materials Science and Technology (Empa); Überlandstrasse 129 CH-8600 Dübendorf Switzerland
| | - Natalia Guerrero-Alburquerque
- Building Energy Materials & Components Laboratory; Swiss Federal Laboratories for Materials Science and Technology (Empa); Überlandstrasse 129 CH-8600 Dübendorf Switzerland
| | - Matthias M. Koebel
- Building Energy Materials & Components Laboratory; Swiss Federal Laboratories for Materials Science and Technology (Empa); Überlandstrasse 129 CH-8600 Dübendorf Switzerland
| | - Gustav Nyström
- Applied Wood Materials Laboratory; Swiss Federal Laboratories for Materials Science and Technology (Empa); Überlandstrasse 129 CH-8600 Dübendorf Switzerland
- Department of Health Science and Technology; ETH Zurich; Schmelzbergstrasse 9 CH-8092 Zürich Switzerland
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Orellana SL, Giacaman A, Vidal A, Morales C, Oyarzun-Ampuero F, Lisoni JG, Henríquez-Báez C, Morán-Trujillo L, Concha M, Moreno-Villoslada I. Chitosan/chondroitin sulfate aerogels with high polymeric electroneutralization degree: formation and mechanical properties. PURE APPL CHEM 2017. [DOI: 10.1515/pac-2016-1111] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Abstract
The formation of ultralight, highly porous solid materials (porosity higher than 99%) containing equivalent molar amounts of chitosan (CS) and chondroitin sulfate (ChS) is presented. First, we show protocols to produce colloidal suspensions of assembled polymer nanocomplexes by simultaneously mixing equimolar amounts of the oppositely charged polysaccharides, preventing macroprecipitation. The colloidal suspensions were then freeze-dried to form the active aerogels. Apparent density in the order of 100–101 mg/cm3 was achieved. The materials show low stiffness (Young’s modulus of about 2 kPa), which make them easy to handle for clinical applications, and easy to compress, pack, store and transport. These characteristics promote them as cheap, safe and biodegradable materials able to be used for several therapeutic purposes, such as wound healing.
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Affiliation(s)
- Sandra L. Orellana
- Instituto de Ciencias Químicas, Facultad de Ciencias , Universidad Austral de Chile , Valdivia , Chile
| | - Annesi Giacaman
- Instituto de Anatomía, Histología y Patología, Facultad de Medicina , Universidad Austral de Chile , Valdivia , Chile
| | - Alejandra Vidal
- Instituto de Anatomía, Histología y Patología, Facultad de Medicina , Universidad Austral de Chile , Valdivia , Chile
| | - Carlos Morales
- Instituto de Ciencias Químicas, Facultad de Ciencias , Universidad Austral de Chile , Valdivia , Chile
| | - Felipe Oyarzun-Ampuero
- Department of Sciences and Pharmaceutical Technologies , Universidad de Chile , Santiago , Chile
| | - Judit G. Lisoni
- Instituto de Ciencias Físicas y Matemáticas, Facultad de Ciencias , Universidad Austral de Chile , Valdivia , Chile
| | - Carla Henríquez-Báez
- Instituto de Ciencias Físicas y Matemáticas, Facultad de Ciencias , Universidad Austral de Chile , Valdivia , Chile
| | - Luis Morán-Trujillo
- Instituto de Ciencias Químicas, Facultad de Ciencias , Universidad Austral de Chile , Valdivia , Chile
| | - Miguel Concha
- Instituto de Anatomía, Histología y Patología, Facultad de Medicina , Universidad Austral de Chile , Valdivia , Chile
| | - Ignacio Moreno-Villoslada
- Instituto de Ciencias Químicas, Facultad de Ciencias , Universidad Austral de Chile , Isla Teja, Casilla 567 , Valdivia , Chile , Tel.: +56 63 2293520
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Srivastava CM, Purwar R, Gupta A, Sharma D. Dextrose modified flexible tasar and muga fibroin films for wound healing applications. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2017; 75:104-114. [DOI: 10.1016/j.msec.2017.02.021] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/15/2016] [Revised: 11/29/2016] [Accepted: 02/06/2017] [Indexed: 12/19/2022]
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Tseng P, Napier B, Zhao S, Mitropoulos AN, Applegate MB, Marelli B, Kaplan DL, Omenetto FG. Directed assembly of bio-inspired hierarchical materials with controlled nanofibrillar architectures. NATURE NANOTECHNOLOGY 2017; 12:474-480. [PMID: 28250472 DOI: 10.1038/nnano.2017.4] [Citation(s) in RCA: 88] [Impact Index Per Article: 12.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/07/2016] [Accepted: 01/09/2017] [Indexed: 06/06/2023]
Abstract
In natural systems, directed self-assembly of structural proteins produces complex, hierarchical materials that exhibit a unique combination of mechanical, chemical and transport properties. This controlled process covers dimensions ranging from the nano- to the macroscale. Such materials are desirable to synthesize integrated and adaptive materials and systems. We describe a bio-inspired process to generate hierarchically defined structures with multiscale morphology by using regenerated silk fibroin. The combination of protein self-assembly and microscale mechanical constraints is used to form oriented, porous nanofibrillar networks within predesigned macroscopic structures. This approach allows us to predefine the mechanical and physical properties of these materials, achieved by the definition of gradients in nano- to macroscale order. We fabricate centimetre-scale material geometries including anchors, cables, lattices and webs, as well as functional materials with structure-dependent strength and anisotropic thermal transport. Finally, multiple three-dimensional geometries and doped nanofibrillar constructs are presented to illustrate the facile integration of synthetic and natural additives to form functional, interactive, hierarchical networks.
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Affiliation(s)
- Peter Tseng
- Silklab, Tufts University, 200 Boston Avenue, Suite 4875 Medford, Massachusetts 02155, USA
| | - Bradley Napier
- Silklab, Tufts University, 200 Boston Avenue, Suite 4875 Medford, Massachusetts 02155, USA
| | - Siwei Zhao
- Department of Biomedical Engineering, Tufts University, Medford, Massachusetts 02155, USA
| | | | - Matthew B Applegate
- Silklab, Tufts University, 200 Boston Avenue, Suite 4875 Medford, Massachusetts 02155, USA
| | - Benedetto Marelli
- Silklab, Tufts University, 200 Boston Avenue, Suite 4875 Medford, Massachusetts 02155, USA
| | - David L Kaplan
- Silklab, Tufts University, 200 Boston Avenue, Suite 4875 Medford, Massachusetts 02155, USA
- Department of Biomedical Engineering, Tufts University, Medford, Massachusetts 02155, USA
- Department of Chemical Engineering, Tufts University, Medford, Massachusetts 02155, USA
| | - Fiorenzo G Omenetto
- Silklab, Tufts University, 200 Boston Avenue, Suite 4875 Medford, Massachusetts 02155, USA
- Department of Biomedical Engineering, Tufts University, Medford, Massachusetts 02155, USA
- Department of Electrical and Computer Engineering, Tufts University, Medford, Massachusetts 02155, USA
- Department of Physics, Tufts University, Medford, Massachusetts 02155, USA
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41
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Electrical stimulation of somatic human stem cells mediated by composite containing conductive nanofibers for ligament regeneration. Biologicals 2017; 46:99-107. [DOI: 10.1016/j.biologicals.2017.01.007] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2017] [Revised: 01/27/2017] [Accepted: 01/29/2017] [Indexed: 01/04/2023] Open
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42
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Synthesis and biomedical applications of aerogels: Possibilities and challenges. Adv Colloid Interface Sci 2016; 236:1-27. [PMID: 27321857 DOI: 10.1016/j.cis.2016.05.011] [Citation(s) in RCA: 165] [Impact Index Per Article: 20.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2016] [Revised: 05/24/2016] [Accepted: 05/25/2016] [Indexed: 02/03/2023]
Abstract
Aerogels are an exceptional group of nanoporous materials with outstanding physicochemical properties. Due to their unique physical, chemical, and mechanical properties, aerogels are recognized as promising candidates for diverse applications including, thermal insulation, catalysis, environmental cleaning up, chemical sensors, acoustic transducers, energy storage devices, metal casting molds and water repellant coatings. Here, we have provided a comprehensive overview on the synthesis, processing and drying methods of the mostly investigated types of aerogels used in the biological and biomedical contexts, including silica aerogels, silica-polymer composites, polymeric and biopolymer aerogels. In addition, the very recent challenges on these aerogels with regard to their applicability in biomedical field as well as for personalized medicine applications are considered and explained in detail.
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