1
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Zhang X, Wang X, Yuan P, Ma C, Wang Y, Zhang Z, Wang P, Zhao Y, Wu W. A 3D-Printed Cuttlefish Bone Elastomeric Sponge Rapidly Controlling Noncompressible Hemorrhage. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024; 20:e2307041. [PMID: 38072798 DOI: 10.1002/smll.202307041] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/16/2023] [Revised: 10/28/2023] [Indexed: 05/12/2024]
Abstract
Developing a self-expanding hemostatic sponge with high blood absorption and rapid shape recovery for noncompressible hemorrhage remains a challenge. In this study, a 3D-printed cuttlefish bone elastomeric sponge (CBES) is fabricated, which combined ordered channels and porous structures, presented tunable mechanical strength, and shape memory potentials. The incorporation of cuttlefish bone powder (CBp) plays key roles in concentrating blood components, promoting aggregation of red blood cells and platelets, and activating platelets, which makes CBES show enhanced hemostatic performance compared with commercial gelatin sponges in vivo. Moreover, CBES promotes more histiocytic infiltration and neovascularization in the early stage of degradation than gelatin sponges, which is conducive to the regeneration and repair of injured tissue. To conclude, CBp loaded 3D-printed elastomeric sponges can promote coagulation, present the potential to guide tissue healing, and broaden the hemostatic application of traditional Chinese medicine.
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Affiliation(s)
- Xinchi Zhang
- State Key Laboratory of Oral & Maxillofacial Reconstruction and Regeneration, National Clinical Research Centre for Oral Diseases, Shaanxi Key Laboratory of Stomatology, Department of Prosthodontics, School of Stomatology, The Fourth Military Medical University, Xi'an, 710032, China
| | - Xuqiao Wang
- State Key Laboratory of Oral & Maxillofacial Reconstruction and Regeneration, National Clinical Research Center for Oral Diseases, Shaanxi Key Laboratory of Stomatology, Department of Oral & Maxillofacial Surgery, School of Stomatology, The Fourth Military Medical University, Xi'an, 710032, China
| | - Pingping Yuan
- State Key Laboratory of Oral & Maxillofacial Reconstruction and Regeneration, National Clinical Research Center for Oral Diseases, Shaanxi Key Laboratory of Stomatology, Department of Oral & Maxillofacial Surgery, School of Stomatology, The Fourth Military Medical University, Xi'an, 710032, China
| | - Chaoqun Ma
- State Key Laboratory of Oral & Maxillofacial Reconstruction and Regeneration, National Clinical Research Center for Oral Diseases, Shaanxi Key Laboratory of Stomatology, Department of Oral & Maxillofacial Surgery, School of Stomatology, The Fourth Military Medical University, Xi'an, 710032, China
| | - Yujiao Wang
- State Key Laboratory of Oral & Maxillofacial Reconstruction and Regeneration, National Clinical Research Center for Oral Diseases, Shaanxi Key Laboratory of Stomatology, Department of Oral & Maxillofacial Surgery, School of Stomatology, The Fourth Military Medical University, Xi'an, 710032, China
| | - Zheqian Zhang
- State Key Laboratory of Oral & Maxillofacial Reconstruction and Regeneration, National Clinical Research Center for Oral Diseases, Shaanxi Key Laboratory of Stomatology, Department of Oral & Maxillofacial Surgery, School of Stomatology, The Fourth Military Medical University, Xi'an, 710032, China
| | - Pengyu Wang
- State Key Laboratory of Oral & Maxillofacial Reconstruction and Regeneration, National Clinical Research Center for Oral Diseases, Shaanxi Key Laboratory of Stomatology, Department of Oral & Maxillofacial Surgery, School of Stomatology, The Fourth Military Medical University, Xi'an, 710032, China
| | - Yimin Zhao
- State Key Laboratory of Oral & Maxillofacial Reconstruction and Regeneration, National Clinical Research Centre for Oral Diseases, Shaanxi Key Laboratory of Stomatology, Department of Prosthodontics, School of Stomatology, The Fourth Military Medical University, Xi'an, 710032, China
| | - Wei Wu
- State Key Laboratory of Oral & Maxillofacial Reconstruction and Regeneration, National Clinical Research Center for Oral Diseases, Shaanxi Key Laboratory of Stomatology, Department of Oral & Maxillofacial Surgery, School of Stomatology, The Fourth Military Medical University, Xi'an, 710032, China
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2
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Zhou Y, Liu W, Zhang S, Liu H, Wu Z, Wang X. Eco-Friendly Flame-Retardant Phase-Change Composite Films Based on Polyphosphazene/Phosphorene Hybrid Foam and Paraffin Wax for Light/Heat-Dual-Actuated Shape Memory. ACS APPLIED MATERIALS & INTERFACES 2024; 16:7754-7767. [PMID: 38306229 DOI: 10.1021/acsami.3c16953] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/04/2024]
Abstract
Multiactuated shape memory materials are a class of promising intelligent materials that have received great interest in the fields of self-healing, anticounterfeiting, biomedical, soft robotic, and smart thermal management applications. To obtain a light/heat-dual-actuated shape memory material for thermal management applications in fire safety, we have designed a type of halogen-free flame-retardant phase-change composite film based on polyaryloxyphosphazene (PDAP)/phosphorene (PR) hybrid foam as a support material and paraffin wax (PW) as a phase-change material (PCM). PDAP was synthesized as a flexible foam matrix through the ring-opening polymerization of hexachlorocyclotriphosphazene, followed by a substitution reaction of aryloxy groups. The porosity of the PDAP foam is improved by introducing PR nanosheets, facilitating a high latent heat capacity of the PDAP-PR/PW composite films for thermal management applications. The PDAP-PR/PW composite films can implement rapid shape recovery within 65 s in the heating process, which is much shorter than that of the corresponding film without PR nanosheets (185 s). Furthermore, the PDAP-PR/PW composite films also exhibit light-actuated shape memory behavior thanks to their good solar-to-thermal energy absorption and conversion contributed by PR nanosheets as a highly effective photothermal material. More importantly, the presence of PR nanosheets imparts an excellent flame-retardant property to the PDAP-PR/PW composite films. The PDAP-PR/PW composite film can be self-extinguished within 2 s after the flame. Through an innovative integration of flexible polyphosphazene foam, PR nanosheets, and solid-liquid PCM to obtain a sensitive actuating response to light and heat, this study offers a new approach for developing multiactuated and eco-friendly flame-retardant shape memory materials to meet the requirement of applications with a requirement of fire safety in soft actuators, thermal therapy, control devices, and so on.
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Affiliation(s)
- Yang Zhou
- State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing 100029, China
| | - Wei Liu
- Key Laboratory of Carbon Fiber and Functional Polymers (Beijing University of Chemical Technology), Ministry of Education, Beijing 100029, China
| | - Shuangkun Zhang
- Key Laboratory of Carbon Fiber and Functional Polymers (Beijing University of Chemical Technology), Ministry of Education, Beijing 100029, China
| | - Huan Liu
- State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing 100029, China
| | - Zhanpeng Wu
- State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing 100029, China
- Key Laboratory of Carbon Fiber and Functional Polymers (Beijing University of Chemical Technology), Ministry of Education, Beijing 100029, China
| | - Xiaodong Wang
- State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing 100029, China
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3
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Beshkoofe S, Baniassadi M, Mahdavi Nejad A, Sheidaei A, Baghani M. Enhancing the Thermal Performance of Shape Memory Polymers: Designing a Minichannel Structure. Polymers (Basel) 2024; 16:500. [PMID: 38399878 PMCID: PMC10892316 DOI: 10.3390/polym16040500] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2023] [Revised: 01/30/2024] [Accepted: 02/02/2024] [Indexed: 02/25/2024] Open
Abstract
This research proposes a numerical approach to improve the thermal performance of shape memory polymers (SMPs) while their mechanical properties remain intact. Sixteen different 3D minichannel structures were numerically designed to investigate the impact of embedded water flow in microchannel networks on the thermal response and shape recovery of SMPs. This work employs two approaches, each with different physics: approach A focuses on solid mechanics analysis and, accordingly, thermal analysis in solids without considering the fluid. approach B tackles solid and fluid mechanics analysis and thermal analysis in both solid and fluid subdomains, which inherently calls for fluid-structure coupling in a uniform procedure. Finally, the results of these two approaches are compared to predict the SMP's thermal and mechanical behavior. The structural designs are then analyzed in terms of their shape recovery speed, recovery ratio, and recovery parameters. The results indicate that isotropic structures thermally outperform their anisotropic counterparts, exhibiting improved thermal characteristics and faster shape recovery. Additionally, it was observed that polymeric structures with a low volume fraction of embedded branches thermally perform efficiently. The findings of this study predict that the geometrical angle between the main branch and sub-branches of SMP favorably impacts the enhancement of thermal characteristics of the structure, accelerating its shape recovery. Approach B accelerates the shape recovery rate in SMPs due to fluid flow and uniform heat transfer within the structures.
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Affiliation(s)
- Saed Beshkoofe
- School of Mechanical Engineering, College of Engineering, University of Tehran, Tehran 1439814151, Iran
| | - Majid Baniassadi
- School of Mechanical Engineering, College of Engineering, University of Tehran, Tehran 1439814151, Iran
| | | | - Azadeh Sheidaei
- Aerospace Engineering Department, Iowa State University, Ames, IA 50011, USA
| | - Mostafa Baghani
- School of Mechanical Engineering, College of Engineering, University of Tehran, Tehran 1439814151, Iran
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4
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Sun H, Pei X, Ruan H, Song F, Wang T, Wang Q, Wang C. “Partition Method”-Inspired Fabrication of Hierarchically Porous Polyetherimide via Supercritical CO 2 Foaming: Achieving Efficient Adsorption of Carbon Dioxide. Ind Eng Chem Res 2023. [DOI: 10.1021/acs.iecr.2c03803] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/22/2023]
Affiliation(s)
- Huiting Sun
- Key Laboratory of Science and Technology on Wear and Protection of Materials, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 73000, China
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Xianqiang Pei
- Key Laboratory of Science and Technology on Wear and Protection of Materials, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 73000, China
| | - Hongwei Ruan
- Key Laboratory of Science and Technology on Wear and Protection of Materials, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 73000, China
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Fuzhi Song
- Key Laboratory of Science and Technology on Wear and Protection of Materials, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 73000, China
| | - Tingmei Wang
- Key Laboratory of Science and Technology on Wear and Protection of Materials, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 73000, China
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Qihua Wang
- Key Laboratory of Science and Technology on Wear and Protection of Materials, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 73000, China
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Chao Wang
- Key Laboratory of Science and Technology on Wear and Protection of Materials, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 73000, China
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5
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Vakil A, Ramezani M, Monroe MBB. Antimicrobial Shape Memory Polymer Hydrogels for Chronic Wound Dressings. ACS APPLIED BIO MATERIALS 2022; 5:5199-5209. [PMID: 36257053 PMCID: PMC9682482 DOI: 10.1021/acsabm.2c00617] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Chronic wounds can remain open for several months and have high risks of amputation due to infection. Dressing materials to treat chronic wounds should be conformable for irregular wound geometries, maintain a moist wound bed, and reduce infection risks. To that end, we developed cytocompatible shape memory polyurethane-based poly(ethylene glycol) (PEG) hydrogels that allow facile delivery to the wound site. Plant-based phenolic acids were physically incorporated onto the hydrogel scaffolds to provide antimicrobial properties. These materials were tested to confirm their shape memory properties, cytocompatibility, and antibacterial properties. The incorporation of phenolic acids provides a new mechanism for tuning intermolecular bonding in the hydrogels and corollary mechanical and shape memory properties. Phenolic acid-containing hydrogels demonstrated an increased shape recovery ratio (1.35× higher than the control formulation), and materials with cytocompatibility >90% were identified. Antimicrobial properties were retained over 20 days in hydrogels with higher phenolic acid content. Phenolic acid retention and antimicrobial efficacy were dependent upon phenolic acid structures and interactions with the polymer backbone. This novel hydrogel system provides a platform for future development as a chronic wound dressing material that is easy to implant and reduces infection risks.
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Affiliation(s)
- Anand
Utpal Vakil
- Department
of Biomedical and Chemical Engineering, BioInspired Syracuse: Institute
for Material and Living Systems, Syracuse
University, Syracuse, New York13244, United States
| | - Maryam Ramezani
- Department
of Biomedical and Chemical Engineering, BioInspired Syracuse: Institute
for Material and Living Systems, Syracuse
University, Syracuse, New York13244, United States
| | - Mary Beth B. Monroe
- Department
of Biomedical and Chemical Engineering, BioInspired Syracuse: Institute
for Material and Living Systems, Syracuse
University, Syracuse, New York13244, United States,Tel: (315) 443-3323 E-mail:
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6
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Wendl T, Bandl C, Kern W, Wendl B, Proff P. A new method for successful indirect bonding in relation to bond strength. BIOMED ENG-BIOMED TE 2022; 67:403-410. [PMID: 35998665 DOI: 10.1515/bmt-2022-0147] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2022] [Accepted: 07/19/2022] [Indexed: 11/15/2022]
Abstract
The aim of the work was to develop a new transfer method for indirect bonding of brackets to improve the bond strength by applying a uniform contact pressure over the entire dental arch. This has a great potential to reduce the bracket loss rate during clinical treatment. A suitable shape memory polymer (SMP) was selected and prepared in the chemistry laboratory. This SMP applies a force to the brackets during bonding and thus increases the bond strength by applying uniform contact pressure. Various transfer trays were equipped with SMP platelets and the transfer of brackets from the plaster model to the real human tooth model was performed in vitro. The transfer accuracy and bond strength of the bonded brackets were investigated by 3D-overlay and shear tests, respectively. The transfer accuracy was technique sensitive and showed higher accuracy for the trays with SMPs and self-curing silicones than for the vacuum formed trays with SMPs. The bond strength of the indirectly bonded brackets with SMPs was on average 1-2 MPa higher than the bond strength of the brackets indirectly bonded with a conventional two-layer vacuum formed tray without SMPs. Thus, transfer trays with SMPs can provide a significant improvement in bond strength during indirect bonding after appropriate adjustment.
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Affiliation(s)
- Thomas Wendl
- Department of Orthodontics, University of Regensburg, Regensburg, Germany
| | - Christine Bandl
- Chair in Chemistry of Polymeric Materials, Montanuniversität Leoben, Leoben, Austria
| | - Wolfgang Kern
- Chair in Chemistry of Polymeric Materials, Montanuniversität Leoben, Leoben, Austria
| | - Brigitte Wendl
- Department of Orthodontics, Medical University Graz, Graz, Austria
| | - Peter Proff
- Department of Orthodontics, University of Regensburg, Regensburg, Germany
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7
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Hasan SM, Touchet T, Jayadeep A, Maitland DJ. Controlling Morphology and Physio-Chemical Properties of Stimulus-Responsive Polyurethane Foams by Altering Chemical Blowing Agent Content. Polymers (Basel) 2022; 14:polym14112288. [PMID: 35683960 PMCID: PMC9183079 DOI: 10.3390/polym14112288] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2022] [Revised: 05/25/2022] [Accepted: 06/01/2022] [Indexed: 12/16/2022] Open
Abstract
Amorphous shape memory polymer foams are currently used as components in vascular occlusion medical devices such as the IMPEDE and IMPEDE-FX Embolization Plugs. Body temperature and moisture-driven actuation of the polymeric foam is necessary for vessel occlusion and the rate of expansion is a function of physio-chemical material properties. In this study, concentrations of the chemical blowing agent for the foam were altered and the resulting effects on morphology, thermal and chemical properties, and actuation rates were studied. Lower concentration of chemical blowing agent yielded foams with thick foam struts due to less bubble formation during the foaming process. Foams with thicker struts also had high tensile modulus and lower strain at break values compared to the foams made with higher blowing agent concentration. Additionally, less blowing agent resulted in foams with a lower glass transition temperature due to less urea formation during the foaming reaction. This exploratory study provides an approach to control thermo-mechanical foam properties and morphology by tuning concentrations of a foaming additive. This work aims to broaden the applications of shape memory polymer foams for medical use.
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Affiliation(s)
- Sayyeda Marziya Hasan
- Shape Memory Medical Inc., Santa Clara, CA 95054, USA
- Correspondence: ; Tel.: +281-745-8366
| | - Tyler Touchet
- Department of Biomedical Engineering, Texas A&M University, College Station, TX 77843, USA; (T.T.); (D.J.M.)
| | - Aishwarya Jayadeep
- Materials Science and Engineering, University of California, Berkeley, CA 94720, USA;
| | - Duncan J. Maitland
- Department of Biomedical Engineering, Texas A&M University, College Station, TX 77843, USA; (T.T.); (D.J.M.)
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8
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Petryk NM, Haas G, Vakil AU, Monroe MBB. Shape memory polymer foams with tunable interconnectivity using off-the-shelf foaming components. J Biomed Mater Res A 2022; 110:1422-1434. [PMID: 35319810 DOI: 10.1002/jbm.a.37383] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2021] [Revised: 03/03/2022] [Accepted: 03/13/2022] [Indexed: 12/28/2022]
Abstract
The ability to easily and safety tune pore structures of gas-blown polyurethane shape memory polymer (SMP) foams could improve their outcomes as hemostatic dressings or tissue engineering scaffolds and enable overall commercialization efforts. Incorporating physical blowing agents into the polymer mix can be used to tune pore size and interconnectivity without altering foam chemistry. Enovate (HFC-254fa) is a commonly used physical blowing agent in gas-blown foams, but the Environmental Protection Agency (EPA) considers its use unacceptable because it is a hydrofluorocarbon that contributes to global warming. Here, off-the-shelf solvents accepted for use by the EPA, acetone, dimethyoxymethane (methylal), and methyl formate, were used as physical blowing agents by adding small volumes during foam fabrication. Increasing the physical blowing agent volume resulted in greater pore interconnectivity while maintaining SMP foam chemical and thermal properties. Pore size and interconnectivity also impacted cell and blood interactions with the foams. This work provides a safe and easy method for tuning SMP foam interconnectivity to aid in future commercialization efforts in a range of potential biomedical applications.
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Affiliation(s)
- Natalie Marie Petryk
- Department of Biomedical and Chemical Engineering, BioInspired Syracuse, Syracuse University, Syracuse, New York, 13244, USA
| | - Grace Haas
- Department of Biomedical and Chemical Engineering, BioInspired Syracuse, Syracuse University, Syracuse, New York, 13244, USA
| | - Anand Utpal Vakil
- Department of Biomedical and Chemical Engineering, BioInspired Syracuse, Syracuse University, Syracuse, New York, 13244, USA
| | - Mary Beth Browning Monroe
- Department of Biomedical and Chemical Engineering, BioInspired Syracuse, Syracuse University, Syracuse, New York, 13244, USA
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9
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Lee SH, An JH, Kim YJ, Lee SJ. Electrically conductive foams via high internal phase emulsions with polypyrrole-modified carbon nanotubes: Morphology, properties, and rheology. POLYMER 2022. [DOI: 10.1016/j.polymer.2022.124600] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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10
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Lee YAL, Mousavikhamene Z, Amrithanath AK, Neidhart SM, Krishnaswamy S, Schatz GC, Odom TW. Programmable Self-Regulation with Wrinkled Hydrogels and Plasmonic Nanoparticle Lattices. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2022; 18:e2103865. [PMID: 34755454 DOI: 10.1002/smll.202103865] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/18/2021] [Revised: 08/25/2021] [Indexed: 06/13/2023]
Abstract
This paper describes a self-regulating system that combines wrinkle-patterned hydrogels with plasmonic nanoparticle (NP) lattices. In the feedback loop, the wrinkle patterns flatten in response to moisture, which then allows light to reach the NP lattice on the bottom layer. Upon light absorption, the NP lattice produces a photothermal effect that dries the hydrogel, and the system then returns to the initial wrinkled configuration. The timescale of this regulatory cycle can be programmed by tuning the degree of photothermal heating by NP size and substrate material. Time-dependent finite element analysis reveals the thermal and mechanical mechanisms of wrinkle formation. This self-regulating system couples morphological, optical, and thermo-mechanical properties of different materials components and offers promising design principles for future smart systems.
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Affiliation(s)
- Young-Ah Lucy Lee
- Department of Materials Science and Engineering, Northwestern University, Evanston, IL, 60208, USA
| | - Zeynab Mousavikhamene
- Department of Chemical and Biological Engineering, Northwestern University, Evanston, IL, 60208, USA
| | | | - Suzanne M Neidhart
- Department of Chemistry, Northwestern University, Evanston, IL, 60208, USA
| | - Sridhar Krishnaswamy
- Department of Mechanical Engineering, Northwestern University, Evanston, IL, 60208, USA
| | - George C Schatz
- Department of Chemical and Biological Engineering, Northwestern University, Evanston, IL, 60208, USA
- Department of Chemistry, Northwestern University, Evanston, IL, 60208, USA
| | - Teri W Odom
- Department of Materials Science and Engineering, Northwestern University, Evanston, IL, 60208, USA
- Department of Chemistry, Northwestern University, Evanston, IL, 60208, USA
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11
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Quadrini F, Bellisario D, Iorio L, Santo L, Pappas P, Koutroumanis N, Anagnostopoulos G, Galiotis C. Shape Memory Composite Sandwich Structures with Self-Healing Properties. Polymers (Basel) 2021; 13:polym13183056. [PMID: 34577957 PMCID: PMC8470463 DOI: 10.3390/polym13183056] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2021] [Revised: 09/05/2021] [Accepted: 09/07/2021] [Indexed: 11/24/2022] Open
Abstract
In this study, Polyurea/Formaldehyde (PUF) microcapsules containing Dicyclopentadiene (DCPD) as a healing substance were fabricated in situ and mixed at relatively low concentrations (<2 wt%) with a thermosetting polyurethane (PU) foam used in turn as the core of a sandwich structure. The shape memory (SM) effect depended on the combination of the behavior of the PU foam core and the shape memory polymer composite (SMPC) laminate skins. SMPC laminates were manufactured by moulding commercial carbon fiber-reinforced (CFR) prepregs with a SM polymer interlayer. At first, PU foam samples, with and without microcapsules, were mechanically tested. After, PU foam was inserted into the SMPC sandwich structure. Damage tests were carried out by compression and bending to deform and break the PU foam cells, and then assess the structure self-healing (SH) and recovery capabilities. Both SM and SH responses were rapid and thermally activated (120 °C). The CFR-SMPC skins and the PU foam core enable the sandwich to exhibit excellent SM properties with a shape recovery ratio up to 99% (initial configuration recovery). Moreover, the integration of microcapsules (0.5 wt%) enables SH functionality with a structural restoration up to 98%. This simple process makes this sandwich structure ideal for different industrial applications.
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Affiliation(s)
- Fabrizio Quadrini
- Department of Industrial Engineering, University of Rome ‘Tor Vergata’, Via del Politecnico 1, 00133 Rome, Italy; (L.I.); (L.S.)
- Correspondence: (F.Q.); (D.B.); Tel.: +39-0672597167 (F.Q.)
| | - Denise Bellisario
- Department of Industrial Engineering, University of Rome ‘Tor Vergata’, Via del Politecnico 1, 00133 Rome, Italy; (L.I.); (L.S.)
- Correspondence: (F.Q.); (D.B.); Tel.: +39-0672597167 (F.Q.)
| | - Leandro Iorio
- Department of Industrial Engineering, University of Rome ‘Tor Vergata’, Via del Politecnico 1, 00133 Rome, Italy; (L.I.); (L.S.)
| | - Loredana Santo
- Department of Industrial Engineering, University of Rome ‘Tor Vergata’, Via del Politecnico 1, 00133 Rome, Italy; (L.I.); (L.S.)
| | - Panagiotis Pappas
- Foundation for Research and Technology Hellas, Institute of Chemical Engineering and High Temperature Chemical Processes, University of Patras, Stadiou Str., Rio, GR 26504 Patras, Greece; (P.P.); (N.K.); (G.A.); (C.G.)
| | - Nikolaos Koutroumanis
- Foundation for Research and Technology Hellas, Institute of Chemical Engineering and High Temperature Chemical Processes, University of Patras, Stadiou Str., Rio, GR 26504 Patras, Greece; (P.P.); (N.K.); (G.A.); (C.G.)
- Department of Chemical Engineering, University of Patras, University Campus, GR 26504 Patras, Greece
| | - George Anagnostopoulos
- Foundation for Research and Technology Hellas, Institute of Chemical Engineering and High Temperature Chemical Processes, University of Patras, Stadiou Str., Rio, GR 26504 Patras, Greece; (P.P.); (N.K.); (G.A.); (C.G.)
| | - Costas Galiotis
- Foundation for Research and Technology Hellas, Institute of Chemical Engineering and High Temperature Chemical Processes, University of Patras, Stadiou Str., Rio, GR 26504 Patras, Greece; (P.P.); (N.K.); (G.A.); (C.G.)
- Department of Chemical Engineering, University of Patras, University Campus, GR 26504 Patras, Greece
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12
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Liu LY, Karaaslan MA, Hua Q, Cho M, Chen S, Renneckar S. Thermo-Responsive Shape-Memory Polyurethane Foams from Renewable Lignin Resources with Tunable Structures–Properties and Enhanced Temperature Resistance. Ind Eng Chem Res 2021. [DOI: 10.1021/acs.iecr.1c01717] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Li-Yang Liu
- Advanced Renewable Materials Lab, Faculty of Forestry, The University of British Columbia, Vancouver, British Columbia V6T 1Z4, Canada
| | - Muzaffer A. Karaaslan
- Advanced Renewable Materials Lab, Faculty of Forestry, The University of British Columbia, Vancouver, British Columbia V6T 1Z4, Canada
| | - Qi Hua
- Advanced Renewable Materials Lab, Faculty of Forestry, The University of British Columbia, Vancouver, British Columbia V6T 1Z4, Canada
| | - MiJung Cho
- Advanced Renewable Materials Lab, Faculty of Forestry, The University of British Columbia, Vancouver, British Columbia V6T 1Z4, Canada
| | - Siwei Chen
- Advanced Renewable Materials Lab, Faculty of Forestry, The University of British Columbia, Vancouver, British Columbia V6T 1Z4, Canada
| | - Scott Renneckar
- Advanced Renewable Materials Lab, Faculty of Forestry, The University of British Columbia, Vancouver, British Columbia V6T 1Z4, Canada
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13
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Zhou Y, Zhou D, Cao P, Zhang X, Wang Q, Wang T, Li Z, He W, Ju J, Zhang Y. 4D Printing of Shape Memory Vascular Stent Based on βCD-g-Polycaprolactone. Macromol Rapid Commun 2021; 42:e2100176. [PMID: 34121258 DOI: 10.1002/marc.202100176] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2021] [Revised: 05/03/2021] [Indexed: 11/07/2022]
Abstract
The 4D-printing technology is applied to fabricate a shape memory peripheral stent with good biocompatibility, which sustains long-term drug release. The star polymer s-PCL is prepared by ring opening polymerization of ε-caprolactone with the -OH of β-cyclodextrin (βCD) as initiator, and then the s-PCL is modified with acrylate endgroup which allows the polymerization under UV light to form the crosslinking network c-PCL. Attributed to the feature of the high crosslinked structure and chemical nature of polycaprolactone (PCL) and βCD, the composite exhibits appropriate tensile strength and sufficient elasticity and bursting pressure, and it is comparable with great saphenous vein in human body. The radial support of the 4D-printed stent is 0.56 ± 0.11 N and is equivalent to that of commercial stent. The cell adhesion and proliferation results show a good biocompatibility of the stent with human umbilical vein endothelial cells. Due to the presence of βCD, the wettability and biocompatibility of the materials are improved, and the sustained paclitaxel release based on the host-guest complexion shows the potential of the drug-loaded stent for long-term release. This study provides a new strategy to solve the urgent need of small-diameter scaffolds to treat critical limb ischemia.
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Affiliation(s)
- Yanyi Zhou
- Vascular Surgery Department, Lanzhou University Second Hospital, Lanzhou, 730000, P. R. China.,Key Laboratory of Science and Technology on Wear and Protection of Materials, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, 730000, P. R. China
| | - Dong Zhou
- Vascular Surgery Department, Lanzhou University Second Hospital, Lanzhou, 730000, P. R. China
| | - Pengrui Cao
- Key Laboratory of Science and Technology on Wear and Protection of Materials, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, 730000, P. R. China.,Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Xinrui Zhang
- Key Laboratory of Science and Technology on Wear and Protection of Materials, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, 730000, P. R. China.,Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Qihua Wang
- Key Laboratory of Science and Technology on Wear and Protection of Materials, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, 730000, P. R. China.,Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Tingmei Wang
- Key Laboratory of Science and Technology on Wear and Protection of Materials, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, 730000, P. R. China.,Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Zhaolong Li
- Vascular Surgery Department, Lanzhou University Second Hospital, Lanzhou, 730000, P. R. China
| | - Wenyang He
- Vascular Surgery Department, Lanzhou University Second Hospital, Lanzhou, 730000, P. R. China
| | - Junping Ju
- State Key Laboratory of Bio-Fibers and Eco-Textiles, Qingdao University, Qingdao, 266071, P. R. China
| | - Yaoming Zhang
- Key Laboratory of Science and Technology on Wear and Protection of Materials, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, 730000, P. R. China.,Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
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14
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Abstract
Smart scaffolds based on shape memory polymer (SMPs) have been increasingly studied in tissue engineering. The unique shape actuating ability of SMP scaffolds has been utilized to improve delivery and/or tissue defect filling. In this regard, these scaffolds may be self-deploying, self-expanding, or self-fitting. Smart scaffolds are generally thermoresponsive or hydroresponsive wherein shape recovery is driven by an increase in temperature or by hydration, respectively. Most smart scaffolds have been directed towards regenerating bone, cartilage, and cardiovascular tissues. A vast variety of smart scaffolds can be prepared with properties targeted for a specific tissue application. This breadth of smart scaffolds stems from the variety of compositions employed as well as the numerous methods used to fabricated scaffolds with the desired morphology. Smart scaffold compositions span across several distinct classes of SMPs, affording further tunability of properties using numerous approaches. Specifically, these SMPs include those based on physically cross-linked and chemically cross-linked networks and include widely studied shape memory polyurethanes (SMPUs). Various additives, ranging from nanoparticles to biologicals, have also been included to impart unique functionality to smart scaffolds. Thus, given their unique functionality and breadth of tunable properties, smart scaffolds have tremendous potential in tissue engineering.
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Affiliation(s)
- Michaela R Pfau
- Department of Biomedical Engineering, Texas A&M University, College Station, TX 77843, USA.
| | - Melissa A Grunlan
- Department of Biomedical Engineering, Texas A&M University, College Station, TX 77843, USA. and Department of Materials Science and Engineering, Texas A&M University, College Station, TX 77843, USA and Department of Chemistry, Texas A&M University, College Station, TX 77843, USA
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15
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Kirillova A, Yeazel TR, Asheghali D, Petersen SR, Dort S, Gall K, Becker ML. Fabrication of Biomedical Scaffolds Using Biodegradable Polymers. Chem Rev 2021; 121:11238-11304. [PMID: 33856196 DOI: 10.1021/acs.chemrev.0c01200] [Citation(s) in RCA: 88] [Impact Index Per Article: 29.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Degradable polymers are used widely in tissue engineering and regenerative medicine. Maturing capabilities in additive manufacturing coupled with advances in orthogonal chemical functionalization methodologies have enabled a rapid evolution of defect-specific form factors and strategies for designing and creating bioactive scaffolds. However, these defect-specific scaffolds, especially when utilizing degradable polymers as the base material, present processing challenges that are distinct and unique from other classes of materials. The goal of this review is to provide a guide for the fabrication of biodegradable polymer-based scaffolds that includes the complete pathway starting from selecting materials, choosing the correct fabrication method, and considering the requirements for tissue specific applications of the scaffold.
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Affiliation(s)
- Alina Kirillova
- Thomas Lord Department of Mechanical Engineering and Materials Science, Duke University, Durham, North Carolina 27708, United States
| | - Taylor R Yeazel
- Thomas Lord Department of Mechanical Engineering and Materials Science, Duke University, Durham, North Carolina 27708, United States
| | - Darya Asheghali
- Department of Chemistry, Duke University, Durham, North Carolina 27708, United States
| | - Shannon R Petersen
- Department of Chemistry, Duke University, Durham, North Carolina 27708, United States
| | - Sophia Dort
- Department of Chemistry, Duke University, Durham, North Carolina 27708, United States
| | - Ken Gall
- Thomas Lord Department of Mechanical Engineering and Materials Science, Duke University, Durham, North Carolina 27708, United States
| | - Matthew L Becker
- Thomas Lord Department of Mechanical Engineering and Materials Science, Duke University, Durham, North Carolina 27708, United States.,Department of Chemistry, Duke University, Durham, North Carolina 27708, United States.,Departments of Biomedical Engineering and Orthopaedic Surgery, Duke University, Durham, North Carolina 27708, United States
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16
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Kapilov-Buchman K, Bialystocki T, Niezni D, Perry L, Levenberg S, Silverstein MS. Porous polycaprolactone and polycarbonate poly(urethane urea)s via emulsion templating: structures, properties, cell growth. Polym Chem 2021. [DOI: 10.1039/d1py01106e] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Macroporous, emulsion-templated, linear poly(urethane urea) elastomers were synthesized from polyols (poly(ε-caprolactone)s or polycarbonates) and a diisocyanate. Growing cells adhered to the walls, spread, and penetrated into the porous structures.
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Affiliation(s)
- Katya Kapilov-Buchman
- Department of Materials Science and Engineering, Technion – Israel Institute of Technology, Haifa 32000, Israel
| | - Tslil Bialystocki
- Department of Materials Science and Engineering, Technion – Israel Institute of Technology, Haifa 32000, Israel
| | - Danna Niezni
- Department of Materials Science and Engineering, Technion – Israel Institute of Technology, Haifa 32000, Israel
| | - Luba Perry
- Department of Biomedical Engineering, Technion – Israel Institute of Technology, Haifa 32000, Israel
| | - Shulamit Levenberg
- Department of Biomedical Engineering, Technion – Israel Institute of Technology, Haifa 32000, Israel
| | - Michael S. Silverstein
- Department of Materials Science and Engineering, Technion – Israel Institute of Technology, Haifa 32000, Israel
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17
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Namdari N, Sojoudi H, Rizvi R. Stimuli responsive optical polymers through omnidirectional and reconfigurable porosity. POLYMER 2020. [DOI: 10.1016/j.polymer.2020.123041] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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18
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Fletcher GK, Nash LD, Graul LM, Jang LK, Herting SM, Wilcox MD, Touchet TJ, Sweatt AK, McDougall MP, Wright SM, Maitland DJ. Chemical Modifications of Porous Shape Memory Polymers for Enhanced X-ray and MRI Visibility. Molecules 2020; 25:E4660. [PMID: 33066091 PMCID: PMC7587375 DOI: 10.3390/molecules25204660] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2020] [Revised: 10/07/2020] [Accepted: 10/12/2020] [Indexed: 12/02/2022] Open
Abstract
The goal of this work was to develop a shape memory polymer (SMP) foam with visibility under both X-ray and magnetic resonance imaging (MRI) modalities. A porous polymeric material with these properties is desirable in medical device development for applications requiring thermoresponsive tissue scaffolds with clinical imaging capabilities. Dual modality visibility was achieved by chemically incorporating monomers with X-ray visible iodine-motifs and MRI visible monomers with gadolinium content. Physical and thermomechanical characterization showed the effect of increased gadopentetic acid (GPA) on shape memory behavior. Multiple compositions showed brightening effects in pilot, T1-weighted MR imaging. There was a correlation between the polymeric density and X-ray visibility on expanded and compressed SMP foams. Additionally, extractions and indirect cytocompatibility studies were performed to address toxicity concerns of gadolinium-based contrast agents (GBCAs). This material platform has the potential to be used in a variety of medical devices.
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Affiliation(s)
- Grace K. Fletcher
- Texas A&M University Biomedical Engineering, Bizzell St, College Station, TX 77843, USA; (G.K.F.); (L.M.G.); (L.K.J.); (S.M.H.); (M.D.W.); (T.J.T.); (A.K.S.); (M.P.M.); (S.M.W.)
| | | | - Lance M. Graul
- Texas A&M University Biomedical Engineering, Bizzell St, College Station, TX 77843, USA; (G.K.F.); (L.M.G.); (L.K.J.); (S.M.H.); (M.D.W.); (T.J.T.); (A.K.S.); (M.P.M.); (S.M.W.)
| | - Lindy K. Jang
- Texas A&M University Biomedical Engineering, Bizzell St, College Station, TX 77843, USA; (G.K.F.); (L.M.G.); (L.K.J.); (S.M.H.); (M.D.W.); (T.J.T.); (A.K.S.); (M.P.M.); (S.M.W.)
| | - Scott M. Herting
- Texas A&M University Biomedical Engineering, Bizzell St, College Station, TX 77843, USA; (G.K.F.); (L.M.G.); (L.K.J.); (S.M.H.); (M.D.W.); (T.J.T.); (A.K.S.); (M.P.M.); (S.M.W.)
| | - Matthew D. Wilcox
- Texas A&M University Biomedical Engineering, Bizzell St, College Station, TX 77843, USA; (G.K.F.); (L.M.G.); (L.K.J.); (S.M.H.); (M.D.W.); (T.J.T.); (A.K.S.); (M.P.M.); (S.M.W.)
| | - Tyler J. Touchet
- Texas A&M University Biomedical Engineering, Bizzell St, College Station, TX 77843, USA; (G.K.F.); (L.M.G.); (L.K.J.); (S.M.H.); (M.D.W.); (T.J.T.); (A.K.S.); (M.P.M.); (S.M.W.)
| | - Ana Katarina Sweatt
- Texas A&M University Biomedical Engineering, Bizzell St, College Station, TX 77843, USA; (G.K.F.); (L.M.G.); (L.K.J.); (S.M.H.); (M.D.W.); (T.J.T.); (A.K.S.); (M.P.M.); (S.M.W.)
| | - Mary P. McDougall
- Texas A&M University Biomedical Engineering, Bizzell St, College Station, TX 77843, USA; (G.K.F.); (L.M.G.); (L.K.J.); (S.M.H.); (M.D.W.); (T.J.T.); (A.K.S.); (M.P.M.); (S.M.W.)
- Texas A&M University Electrical and Computer Engineering, Bizzell St, College Station, TX 77843, USA
| | - Steven M. Wright
- Texas A&M University Biomedical Engineering, Bizzell St, College Station, TX 77843, USA; (G.K.F.); (L.M.G.); (L.K.J.); (S.M.H.); (M.D.W.); (T.J.T.); (A.K.S.); (M.P.M.); (S.M.W.)
- Texas A&M University Electrical and Computer Engineering, Bizzell St, College Station, TX 77843, USA
| | - Duncan J. Maitland
- Texas A&M University Biomedical Engineering, Bizzell St, College Station, TX 77843, USA; (G.K.F.); (L.M.G.); (L.K.J.); (S.M.H.); (M.D.W.); (T.J.T.); (A.K.S.); (M.P.M.); (S.M.W.)
- Shape Memory Medical Inc., Santa Clara, CA 95054, USA;
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19
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Shape Memory Polymer Foams Synthesized Using Glycerol and Hexanetriol for Enhanced Degradation Resistance. Polymers (Basel) 2020; 12:polym12102290. [PMID: 33036235 PMCID: PMC7600845 DOI: 10.3390/polym12102290] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2020] [Revised: 10/01/2020] [Accepted: 10/05/2020] [Indexed: 01/21/2023] Open
Abstract
Shape memory polymer foams have been used in a wide range of medical applications, including, but not limited to, vessel occlusion and aneurysm treatment. This unique polymer system has been proven to shape-fill a void, which makes it useful for occlusion applications. While the shape memory polymer foam has superior performance and healing outcomes compared to its leading competitors, some device applications may benefit from longer material degradation times, or degradation-resistant formulations with increased fibrous encapsulation. In this study, biostable shape memory polymer foams were synthesized, and their physical and chemical properties were characterized as an initial evaluation of feasibility for vascular occlusion applications. After characterizing their shape memory behavior in an aqueous environment, degradation of this polymer system was studied in vitro using accelerated oxidative and hydrolytic solutions. Results indicated that the foams did not lose mass under oxidative or hydrolytic conditions, and they maintained high shape recovery in aqueous in vitro models. These degradation-resistant systems have potential for use in vascular occlusion and other wound healing applications that benefit from permanent, space-filling shape memory behavior.
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20
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Amato DN, Amato DV, Sandoz M, Weigand J, Patton DL, Visser CW. Programmable Porous Polymers via Direct Bubble Writing with Surfactant-Free Inks. ACS APPLIED MATERIALS & INTERFACES 2020; 12:42048-42055. [PMID: 32805865 PMCID: PMC7503514 DOI: 10.1021/acsami.0c07945] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/30/2020] [Accepted: 08/10/2020] [Indexed: 05/07/2023]
Abstract
Fabrication of macroporous polymers with functionally graded architecture or chemistry bears transformative potential in acoustic damping, energy storage materials, flexible electronics, and filtration but is hardly reachable with current processes. Here, we introduce thiol-ene chemistries in direct bubble writing, a recent technique for additive manufacturing of foams with locally controlled cell size, density, and macroscopic shape. Surfactant-free and solvent-free graded three-dimensional (3D) foams without drying-induced shrinkage were fabricated by direct bubble writing at an unparalleled ink viscosity of 410 cP (40 times higher than previous formulations). Functionalities including shape memory, high glass transition temperatures (>25 °C), and chemical gradients were demonstrated. These results extend direct bubble writing from aqueous inks to nonaqueous formulations at high liquid flow rates (3 mL min-1). Altogether, direct bubble writing with thiol-ene inks promises rapid one-step fabrication of functional materials with locally controlled gradients in the chemical, mechanical, and architectural domains.
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Affiliation(s)
- Dahlia N. Amato
- School of Polymer
Science and Engineering, University of Southern
Mississippi, Hattiesburg, Mississippi 39406, United States
| | - Douglas V. Amato
- School of Polymer
Science and Engineering, University of Southern
Mississippi, Hattiesburg, Mississippi 39406, United States
| | - Michael Sandoz
- School of Polymer
Science and Engineering, University of Southern
Mississippi, Hattiesburg, Mississippi 39406, United States
| | - Jeremy Weigand
- School of Polymer
Science and Engineering, University of Southern
Mississippi, Hattiesburg, Mississippi 39406, United States
| | - Derek L. Patton
- School of Polymer
Science and Engineering, University of Southern
Mississippi, Hattiesburg, Mississippi 39406, United States
| | - Claas Willem Visser
- Engineering Fluid Dynamics Group, Thermal
and Fluid Engineering Department, Faculty of Engineering Technology, University of Twente, Drienerlolaan 5, 7500AE Enschede, The Netherlands
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21
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Lozinsky VI. Cryostructuring of Polymeric Systems. 55. Retrospective View on the More than 40 Years of Studies Performed in the A.N.Nesmeyanov Institute of Organoelement Compounds with Respect of the Cryostructuring Processes in Polymeric Systems. Gels 2020; 6:E29. [PMID: 32927850 PMCID: PMC7559272 DOI: 10.3390/gels6030029] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2020] [Revised: 09/01/2020] [Accepted: 09/02/2020] [Indexed: 02/06/2023] Open
Abstract
The processes of cryostructuring in polymeric systems, the techniques of the preparation of diverse cryogels and cryostructurates, the physico-chemical mechanisms of their formation, and the applied potential of these advanced polymer materials are all of high scientific and practical interest in many countries. This review article describes and discusses the results of more than 40 years of studies in this field performed by the researchers from the A.N.Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences-one of the key centers, where such investigations are carried out. The review includes brief historical information, the description of the main effects and trends characteristic of the cryostructuring processes, the data on the morphological specifics inherent in the polymeric cryogels and cryostructurates, and examples of their implementation for solving certain applied tasks.
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Affiliation(s)
- Vladimir I Lozinsky
- A.N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Vavilov Street, 28, 119991 Moscow, Russia
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22
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Walter M, Friess F, Krus M, Zolanvari SMH, Grün G, Kröber H, Pretsch T. Shape Memory Polymer Foam with Programmable Apertures. Polymers (Basel) 2020; 12:E1914. [PMID: 32854329 PMCID: PMC7565147 DOI: 10.3390/polym12091914] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2020] [Revised: 08/14/2020] [Accepted: 08/19/2020] [Indexed: 11/30/2022] Open
Abstract
In this work, a novel type of polyester urethane urea (PEUU) foam is introduced. The foam was produced by reactive foaming using a mixture of poly(1,10-decamethylene adipate) diol and poly(1,4-butylene adipate) diol, 4,4'-diphenylmethane diisocyanate, 1,4-butanediol, diethanolamine and water as blowing agent. As determined by differential scanning calorimetry, the melting of the ester-based phases occurred at temperatures in between 25 °C and 61 °C, while the crystallization transition spread from 48 °C to 20 °C. The mechanical properties of the foam were simulated with the hyperplastic models Neo-Hookean and Ogden, whereby the latter showed a better agreement with the experimental data as evidenced by a Pearson correlation coefficient R² above 0.99. Once thermomechanically treated, the foam exhibited a maximum actuation of 13.7% in heating-cooling cycles under a constant external load. In turn, thermal cycling under load-free conditions resulted in an actuation of more than 10%. Good thermal insulation properties were demonstrated by thermal conductivities of 0.039 W·(m·K)-1 in the pristine state and 0.052 W·(m·K)-1 in a state after compression by 50%, respectively. Finally, three demonstrators were developed, which closed an aperture or opened it again simply by changing the temperature. The self-sufficient material behavior is particularly promising in the construction industry, where programmable air slots offer the prospect of a dynamic insulation system for an adaptive building envelope.
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Affiliation(s)
- Mario Walter
- Fraunhofer Institute for Applied Polymer Research IAP, Geiselbergstr. 69, 14476 Potsdam, Germany; (M.W.); (F.F.)
| | - Fabian Friess
- Fraunhofer Institute for Applied Polymer Research IAP, Geiselbergstr. 69, 14476 Potsdam, Germany; (M.W.); (F.F.)
| | - Martin Krus
- Fraunhofer Institute for Building Physics IBP, Fraunhoferstraße 10, 83626 Valley, Germany; (M.K.); (S.M.H.Z.); (G.G.)
| | | | - Gunnar Grün
- Fraunhofer Institute for Building Physics IBP, Fraunhoferstraße 10, 83626 Valley, Germany; (M.K.); (S.M.H.Z.); (G.G.)
| | - Hartmut Kröber
- Fraunhofer Institute for Chemical Technology ICT, Joseph-von-Fraunhofer-Straße 7, 76327 Pfinztal, Germany;
| | - Thorsten Pretsch
- Fraunhofer Institute for Applied Polymer Research IAP, Geiselbergstr. 69, 14476 Potsdam, Germany; (M.W.); (F.F.)
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23
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Huang K, Yang MS, Tang YJ, Ling SY, Pan F, Liu XD, Chen J. Porous shape memory scaffold of dextran and hydroxyapatite for minimum invasive implantation for bone tissue engineering applications. J Biomater Appl 2020; 35:823-837. [PMID: 32842853 DOI: 10.1177/0885328220950062] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Minimally invasive implantation of a porous scaffold of large volume into bone defect site remains a challenge. Scaffolds based on shape memory polymer (SMP) show potential to be delivered in the compact form via minimally invasive surgery. The present study chooses poly (ε-caprolactone)-diols (PCL-diols) as the SMP to cross-link carboxyl dextran via ester bonds together with particle leaching method to yield a porous SMP scaffold. The inner surfaces of porous SMP scaffold are then mineralized via in situ precipitation to yield mineralized porous SMP-hydroxyapatite (SMP-HA) scaffold. The porous SMP-HA scaffold possesses pore size of 400-500 μm, with HA particles uniformly distributed and orientationally aligned on the inner surfaces of scaffold. X-ray diffraction (XRD) and differential scanning calorimetry (DSC) are carried out to identify the HA deposition. The phase transition temperature of the scaffold is adjusted to 38°C via changing the dosage of PCL (molecule weight: 2800) to endow the scaffold with shape deformation and fixed properties, as well as well-performed shape recovery property under body temperature. Bone marrow mesenchymal stem cells (BMSCs) adhere on the inner surfaces of SMP-HA scaffold, exhibiting larger spreading area when compared to cells adhered on SMP scaffold without HA, promoting its osteogenesis. In vivo degradation showed that the scaffold degrades completely after 6 months post-implantation. At the same time, significant tissue and capillary invasion indicated that the present porous SMP-HA scaffold hold great promise towards bone tissue engineering applications.
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Affiliation(s)
- Kai Huang
- Shanghai Zhabei District Library, Shanghai, China
| | - Mo-Song Yang
- Shanghai Zhabei District Library, Shanghai, China
| | - Yu-Jun Tang
- Shanghai Zhabei District Library, Shanghai, China
| | | | - Feng Pan
- Shanghai Zhabei District Library, Shanghai, China
| | | | - Jun Chen
- Department of Orthopedic, Zhabei Central Hospital of Jin'an District, Shanghai, China
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24
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Xiao R, Huang WM. Heating/Solvent Responsive Shape-Memory Polymers for Implant Biomedical Devices in Minimally Invasive Surgery: Current Status and Challenge. Macromol Biosci 2020; 20:e2000108. [PMID: 32567193 DOI: 10.1002/mabi.202000108] [Citation(s) in RCA: 38] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2020] [Revised: 05/03/2020] [Indexed: 12/16/2022]
Abstract
This review is about the fundamentals and practical issues in applying both heating and solvent responsive shape memory polymers (SMPs) for implant biomedical devices via minimally invasive surgery. After revealing the general requirements in the design of biomedical devices based on SMPs and the fundamentals for the shape-memory effect in SMPs, the underlying mechanisms, characterization methods, and several representative biomedical applications, including vascular stents, tissue scaffolds, occlusion devices, drug delivery systems, and the current R&D status of them, are discussed. The new opportunities arising from emerging technologies, such as 3D printing, and new materials, such as vitrimer, are also highlighted. Finally, the major challenge that limits the practical clinical applications of SMPs at present is addressed.
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Affiliation(s)
- Rui Xiao
- Key Laboratory of Soft Machines and Smart Devices of Zhejiang Province, Department of Engineering Mechanics, Zhejiang University, Hangzhou, 310027, China
| | - Wei Min Huang
- School of Mechanical and Aerospace Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore
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25
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Mendibil X, Ortiz R, Sáenz de Viteri V, Ugartemendia JM, Sarasua JR, Quintana I. High Throughput Manufacturing of Bio-Resorbable Micro-Porous Scaffolds Made of Poly(L-lactide-co-ε-caprolactone) by Micro-Extrusion for Soft Tissue Engineering Applications. Polymers (Basel) 2019; 12:E34. [PMID: 31878300 PMCID: PMC7023538 DOI: 10.3390/polym12010034] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2019] [Revised: 12/18/2019] [Accepted: 12/22/2019] [Indexed: 11/17/2022] Open
Abstract
Porous scaffolds made of elastomeric materials are of great interest for soft tissue engineering. Poly(L-lactide-co-ε-caprolactone) (PLCL) is a bio-resorbable elastomeric copolymer with tailorable properties, which make this material an appropriate candidate to be used as scaffold for vascular, tendon, and nerve healing applications. Here, extrusion was applied to produce porous scaffolds of PLCL, using NaCl particles as a leachable agent. The effects of the particle proportion and size on leaching performance, dimensional stability, mechanical properties, and ageing of the scaffolds were analyzed. The efficiency of the particle leaching and scaffold swelling when wet were observed to be dependent on the porogenerator proportion, while the secant moduli and ultimate tensile strengths were dependent on the pore size. Porosity, swelling, and mechanical properties of the extruded scaffolds were tailorable, varying with the proportion and size of porogenerator particles and showed similar values to human soft tissues like nerves and veins (E = 7-15 MPa, σu = 7 MPa). Up to 300-mm length micro-porous PLCL tube with 400-µm thickness wall was extruded, proving extrusion as a high-throughput manufacturing process to produce tubular elastomeric bio-resorbable porous scaffolds of unrestricted length with tunable mechanical properties.
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Affiliation(s)
| | - Rocío Ortiz
- IK4-TEKNIKER, C/IñakiGoenaga 5, 20600 Eibar, Spain; (X.M.)
| | | | - Jone M. Ugartemendia
- Department of Mining-Metallurgy Engineering and Materials Science, School of Engineering, University of the Basque Country (EHU-UPV), 48013 Bilbao, Spain (J.-R.S.)
| | - Jose-Ramon Sarasua
- Department of Mining-Metallurgy Engineering and Materials Science, School of Engineering, University of the Basque Country (EHU-UPV), 48013 Bilbao, Spain (J.-R.S.)
| | - Iban Quintana
- IK4-TEKNIKER, C/IñakiGoenaga 5, 20600 Eibar, Spain; (X.M.)
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26
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Wang C, Dai Y, Kou B, Huang WM. Influence of Long-Term Storage on Shape Memory Performance and Mechanical Behavior of Pre-stretched Commercial Poly(methyl methacrylate) (PMMA). Polymers (Basel) 2019; 11:polym11121978. [PMID: 31805701 PMCID: PMC6960707 DOI: 10.3390/polym11121978] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2019] [Revised: 11/16/2019] [Accepted: 11/16/2019] [Indexed: 12/20/2022] Open
Abstract
In this paper, we experimentally investigate the influence of storage at 40 °C on the shape memory performance and mechanical behavior of a pre-stretched commercial poly(methyl methacrylate) (PMMA). This is to simulate the scenario in many applications. Although this is a very important topic in engineering practice, it has rarely been touched upon so far. The shape memory performance is characterized in terms of the shape fixity ratio (after up to one year of storage) and shape recovery ratio (upon heating to previous programming temperature). Programming in the mode of uniaxial tension is carried out at a temperature within the glass transition range to one of four prescribed programming strains (namely 10%, 20%, 40% and 80%). Also investigated is the residual strain after heating for shape recovery. The characterization of the mechanical behavior of programmed samples after storage for up to three months is via cyclic uniaxial tensile test. It is concluded that from an engineering application point view, for this particular PMMA, programming should be done at higher temperatures (i.e., above its Tg of 110 °C) in order to not only achieve reliable and better shape memory performance, but also minimize the influence of storage on the shape memory performance and mechanical behavior of the programmed material. This finding provides a useful guide for engineering applications of shape memory polymers, in particular based on the multiple-shape memory effect, temperature memory effect, and/or low temperature programming.
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Affiliation(s)
- Changchun Wang
- Jiangsu key laboratory of advanced structural materials & application technology, School of Material Science and Engineering, Nanjing Institute of Technology, Nanjing 211167, China; (C.W.); (Y.D.); (B.K.)
| | - Yuming Dai
- Jiangsu key laboratory of advanced structural materials & application technology, School of Material Science and Engineering, Nanjing Institute of Technology, Nanjing 211167, China; (C.W.); (Y.D.); (B.K.)
| | - Bo Kou
- Jiangsu key laboratory of advanced structural materials & application technology, School of Material Science and Engineering, Nanjing Institute of Technology, Nanjing 211167, China; (C.W.); (Y.D.); (B.K.)
| | - Wei Min Huang
- School of Mechanical and Aerospace Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, Singapore
- Correspondence:
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27
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Utroša P, Onder OC, Žagar E, Kovačič S, Pahovnik D. Shape Memory Behavior of Emulsion-Templated Poly(ε-Caprolactone) Synthesized by Organocatalyzed Ring-Opening Polymerization. Macromolecules 2019. [DOI: 10.1021/acs.macromol.9b01780] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Petra Utroša
- Department of Polymer Chemistry and Technology, National Institute of Chemistry, Hajdrihova 19, 1000 Ljubljana, Slovenia
| | - Ozgun Can Onder
- Department of Polymer Chemistry and Technology, National Institute of Chemistry, Hajdrihova 19, 1000 Ljubljana, Slovenia
| | - Ema Žagar
- Department of Polymer Chemistry and Technology, National Institute of Chemistry, Hajdrihova 19, 1000 Ljubljana, Slovenia
| | - Sebastijan Kovačič
- Department of Polymer Chemistry and Technology, National Institute of Chemistry, Hajdrihova 19, 1000 Ljubljana, Slovenia
| | - David Pahovnik
- Department of Polymer Chemistry and Technology, National Institute of Chemistry, Hajdrihova 19, 1000 Ljubljana, Slovenia
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28
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Lendlein A, Balk M, Tarazona NA, Gould OEC. Bioperspectives for Shape-Memory Polymers as Shape Programmable, Active Materials. Biomacromolecules 2019; 20:3627-3640. [PMID: 31529957 DOI: 10.1021/acs.biomac.9b01074] [Citation(s) in RCA: 42] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Within the natural world, organisms use information stored in their material structure to generate a physical response to a wide variety of environmental changes. The ability to program synthetic materials to intrinsically respond to environmental changes in a similar manner has the potential to revolutionize material science. By designing polymeric devices capable of responsively changing shape or behavior based on information encoded into their structure, we can create functional physical behavior, including a shape-memory and an actuation capability. Here we highlight the stimuli-responsiveness and shape-changing ability of biological materials and biopolymer-based materials, plus their potential biomedical application, providing a bioperspective on shape-memory materials. We address strategies to incorporate a shape-memory (actuation) function in polymeric materials, conceptualized in terms of its relationship with inputs (environmental stimuli) and outputs (shape change). Challenges and opportunities associated with the integration of several functions in a single material body to achieve multifunctionality are discussed. Finally, we describe how elements that sense, convert, and transmit stimuli have been used to create multisensitive materials.
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Affiliation(s)
- Andreas Lendlein
- Institute of Biomaterial Science , Helmholtz-Zentrum Geesthacht , Kantstrasse 55 , Teltow , Germany.,Institute of Chemistry , University of Potsdam , Karl-Liebknecht-Straße 24-25 , Potsdam , Germany
| | - Maria Balk
- Institute of Biomaterial Science , Helmholtz-Zentrum Geesthacht , Kantstrasse 55 , Teltow , Germany
| | - Natalia A Tarazona
- Institute of Biomaterial Science , Helmholtz-Zentrum Geesthacht , Kantstrasse 55 , Teltow , Germany
| | - Oliver E C Gould
- Institute of Biomaterial Science , Helmholtz-Zentrum Geesthacht , Kantstrasse 55 , Teltow , Germany
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29
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Kumar B, Noor N, Thakur S, Pan N, Narayana H, Yan SC, Wang F, Shah P. Shape Memory Polyurethane-Based Smart Polymer Substrates for Physiologically Responsive, Dynamic Pressure (Re)Distribution. ACS OMEGA 2019; 4:15348-15358. [PMID: 31572833 PMCID: PMC6761750 DOI: 10.1021/acsomega.9b01167] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/23/2019] [Accepted: 09/02/2019] [Indexed: 06/10/2023]
Abstract
Shape memory polymers (SMPs) are an exciting class of stimuli-responsive smart materials that demonstrate reactive and reversible changes in mechanical property, usually by switching between different states due to external stimuli. We report on the development of a polyurethane-based SMP foam for effective pressure redistribution that demonstrates controllable changes in dynamic pressure redistribution capability at a low transition temperature (∼24 °C)-ideally suited to matching modulations in body contact pressure for dynamic pressure relief (e.g., for alleviation or pressure ulcer effects). The resultant SMP material has been extensively characterized by a series of tests including stress-strain testing, compression testing, dynamic mechanical analysis, optical microscopy, UV-visible absorbance spectroscopy, variable-temperature areal pressure distribution, Fourier transform infrared spectroscopy, Raman spectroscopy, X-ray diffraction, differential scanning calorimetry, dynamic thermogravimetric analysis, and 1H nuclear magnetic resonance spectroscopy. The foam system exhibits high responsivity when tested for plantar pressure modulation with significant potential in pressure ulcers treatment. Efficient pressure redistribution (∼80% reduction in interface pressure), high stress response (∼30% applied stress is stored in fixity and released on recovery), and excellent deformation recovery (∼100%) are demonstrated in addition to significant cycling ability without performance loss. By providing highly effective pressure redistribution and modulation when in contact with the body's surface, this SMP foam offers novel mechanisms for alleviating the risk of pressure ulcers.
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Affiliation(s)
- Bipin Kumar
- Department of Textile Technology, Indian
Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India
| | - Nuruzzaman Noor
- Institute of Textiles and Clothing, University Research
Facility in Chemical and Environmental Analysis, and School of Design, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong SAR, China
| | - Suman Thakur
- Institute of Textiles and Clothing, University Research
Facility in Chemical and Environmental Analysis, and School of Design, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong SAR, China
| | - Ning Pan
- Biological & Agricultural Engineering, UC Davis, Davis, California 95616, United States
| | - Harishkumar Narayana
- Institute of Textiles and Clothing, University Research
Facility in Chemical and Environmental Analysis, and School of Design, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong SAR, China
| | - Siu-cheong Yan
- Institute of Textiles and Clothing, University Research
Facility in Chemical and Environmental Analysis, and School of Design, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong SAR, China
| | - Faming Wang
- Institute of Textiles and Clothing, University Research
Facility in Chemical and Environmental Analysis, and School of Design, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong SAR, China
| | - Parth Shah
- Institute of Textiles and Clothing, University Research
Facility in Chemical and Environmental Analysis, and School of Design, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong SAR, China
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30
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Hou Y, Fang G, Jiang Y, Song H, Zhang Y, Zhao Q. Emulsion Lyophilization as a Facile Pathway to Fabricate Stretchable Polymer Foams Enabling Multishape Memory Effect and Clip Application. ACS APPLIED MATERIALS & INTERFACES 2019; 11:32423-32430. [PMID: 31409064 DOI: 10.1021/acsami.9b11424] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Solvent freezing is an important method to produce polymer foams with highly tunable pore structure. However, foams prepared from aqueous solution precursors commonly suffer from poor water resistance, whereas those organo-phase systems are not environmental friendly. Here, we present that using an emulsion lyophilization method can overcome such a contradiction and synthesize multifunctional polymer foams. Commercially available polyacrylate-based emulsions with various targeted glass transition temperatures (Tgs) were applied. Adipodihydrazide molecules contained in the water phase of the emulsions reacted with the acetyl groups on the polymers during the freeze-drying, forming elastic networks to maintain the pore structure. The foams can tolerate a 650% elongation without failure and are notch insensitive. The porosity of the foams can be tuned from approximately 45 to 90% via lyophilization of diluted emulsions. The facile blending of emulsions with different targeted Tgs enabled foams with multishape memory capability. Moreover, the foams showed an excellent mechanical damping property, and the slow recovery nature enabled a clip application of clamping extremely weak objects.
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Affiliation(s)
- Yukun Hou
- State Key Laboratory of Chemical Engineering, College of Chemical and Biological Engineering , Zhejiang University , Hangzhou 310027 , China
| | - Guangqiang Fang
- Institute of Aerospace System Engineering Shanghai , Shanghai 201109 , China
- Space Structure and Mechanism Technology Laboratory of China Aerospace Science and Technology Group Co.Ltd , Shanghai 201109 , China
| | - Yongbo Jiang
- State Key Laboratory of Chemical Engineering, College of Chemical and Biological Engineering , Zhejiang University , Hangzhou 310027 , China
| | - Huijie Song
- State Key Laboratory of Chemical Engineering, College of Chemical and Biological Engineering , Zhejiang University , Hangzhou 310027 , China
| | - Yuhua Zhang
- Zhejiang Provincial People's Hospital , Hangzhou 310014 , China
- People's Hospital of Hangzhou Medical College , Hangzhou 310014 , China
| | - Qian Zhao
- State Key Laboratory of Chemical Engineering, College of Chemical and Biological Engineering , Zhejiang University , Hangzhou 310027 , China
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31
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32
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Weems AC, Wacker KT, Maitland DJ. Improved Oxidative Biostability of Porous Shape Memory Polymers by Substituting Triethanolamine for Glycerol. J Appl Polym Sci 2019; 136. [PMID: 32601505 DOI: 10.1002/app.47857] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
While many aromatic polyurethane systems suffer from poor hydrolytic stability, more recently proposed aliphatic systems are oxidatively-labile. The use of the renewable monomer glycerol as a more oxidatively-resistant moiety for inclusion in shape memory polymers (SMPs) is demonstrated here. Glycerol-containing SMPs and the amino alcohol control compositions are compared, with accelerated degradation testing displaying increased stability (time to complete mass loss) as a result of the inclusion of glycerol without sacrificing the shape memory, thermal transitions, or the ultralow density achieved with the control compositions. Gravimetric analysis in accelerated oxidative solution indicates that the control will undergo complete mass loss by approximately 18 days, while lower concentrations of glycerol will degrade fully by 30 days and higher concentrations will possess approximately 40% mass at the same time. In real time degradation analysis, high concentrations of glycerol SMPs have 96% mass remaining at 8 months with 88% gel fraction remaining that that time, compared to less than 50% mass for the control samples with 5% gelation. Mechanically, low glycerol-containing SMPs were not robust enough for testing at three months, while high glycerol concentrations displayed increased elastic moduli (133% of virgin materials) and 18% decreased strain to failure. The role of the secondary alcohol, as well as isocyanates, is presented as being a crucial component in controlling degradation; a free secondary alcohol can more rapidly undergo oxidation or dehydration to ultimately yield carboxylic acids, aldehydes, carbon dioxide, and alkenes. Understanding these pathways will improve the utility of medical devices through more precise control of property loss and patient risk management through reduced degradation.
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Affiliation(s)
- Andrew C Weems
- Department of Biomedical Engineering, Texas A&M University, College Station, TX, 77843-3120, USA.,Department of Chemistry, Texas A&M University, College Station, Texas, 77843-3120, USA
| | - Kevin T Wacker
- Department of Biomedical Engineering, Texas A&M University, College Station, TX, 77843-3120, USA.,Department of Chemistry, Texas A&M University, College Station, Texas, 77843-3120, USA
| | - Duncan J Maitland
- Department of Biomedical Engineering, Texas A&M University, College Station, TX, 77843-3120, USA.,Department of Chemistry, Texas A&M University, College Station, Texas, 77843-3120, USA
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33
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Abstract
Smart polymers that are capable of controlled shape transformations under external stimuli have attracted significant attention in the recent years due to the resemblance of this behavior to the biological intelligence observed in nature. In this review, we focus on the recent progress in the field of shape-morphing polymers, highlighting their most promising applications in the biomedical field.
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Affiliation(s)
- Alina Kirillova
- Department of Mechanical Engineering and Materials Science
- Edmund T. Pratt Jr. School of Engineering
- Duke University
- Durham
- USA
| | - Leonid Ionov
- Faculty of Engineering Science
- University of Bayreuth
- 95440 Bayreuth
- Germany
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34
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35
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Pan Z, Liu Z. A novel fractional viscoelastic constitutive model for shape memory polymers. ACTA ACUST UNITED AC 2018. [DOI: 10.1002/polb.24631] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Zhouzhou Pan
- International Center for Applied Mechanics; State Key Laboratory for Strength and Vibration of Mechanical Structures, School of Aerospace, Xi'an Jiaotong University; Xi'an 710049 China
| | - Zishun Liu
- International Center for Applied Mechanics; State Key Laboratory for Strength and Vibration of Mechanical Structures, School of Aerospace, Xi'an Jiaotong University; Xi'an 710049 China
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36
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Sen T, Ozcelik B, Ozmen MM. Tough and hierarchical porous cryogel scaffolds preparation using n-butanol as a non-solvent. INT J POLYM MATER PO 2018. [DOI: 10.1080/00914037.2018.1452225] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Affiliation(s)
- Tugce Sen
- Department of Bioengineering, Yildiz Technical University, Esenler, Istanbul, Turkey
| | - Berkay Ozcelik
- Polymer Science Group, Department of Chemical and Biomolecular Engineering, University of Melbourne, Melbourne, VIC, Australia
- Commonwealth Scientific and Industrial Research Organisation, Manufacturing Business Unit, Clayton, VIC, Australia
| | - Mehmet Murat Ozmen
- Department of Bioengineering, Yildiz Technical University, Esenler, Istanbul, Turkey
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37
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Zhang W, Zhang K, Li G, Yan S, Cui L, Yin J. Effects of large dimensional deformation of a porous structure on stem cell fate activated by poly(l-glutamic acid)-based shape memory scaffolds. Biomater Sci 2018; 6:2738-2749. [DOI: 10.1039/c8bm00705e] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The effects of mechanostructural stimuli on stem cell fate in 3D structures have been investigated in a poly(l-glutamic acid)-based shape memory porous scaffold; the results indicate the scaffold a potential cell carrier.
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Affiliation(s)
- Weijun Zhang
- Department of Polymer Materials
- Shanghai University
- Shanghai 200444
- P. R. China
| | - Kunxi Zhang
- Department of Polymer Materials
- Shanghai University
- Shanghai 200444
- P. R. China
| | - Guifei Li
- Department of Polymer Materials
- Shanghai University
- Shanghai 200444
- P. R. China
| | - Shifeng Yan
- Department of Polymer Materials
- Shanghai University
- Shanghai 200444
- P. R. China
| | - Lei Cui
- Department of Orthopaedics Surgery
- Shanghai Tongji Hospital
- Tongji University School of Medicine
- Shanghai 200065
- P. R. China
| | - Jingbo Yin
- Department of Polymer Materials
- Shanghai University
- Shanghai 200444
- P. R. China
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38
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Gu SY, Chang K, Jin SP. A dual-induced self-expandable stent based on biodegradable shape memory polyurethane nanocomposites (PCLAU/Fe3
O4
) triggered around body temperature. J Appl Polym Sci 2017. [DOI: 10.1002/app.45686] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Shu-Ying Gu
- Department of Polymer Materials; School of Materials Science and Engineering, Tongji University; Shanghai 201804 People's Republic of China
- Key Laboratory of Advanced Civil Engineering Materials; Ministry of Education, Tongji University; Shanghai 201804 People's Republic of China
| | - Kun Chang
- Department of Polymer Materials; School of Materials Science and Engineering, Tongji University; Shanghai 201804 People's Republic of China
| | - Sheng-Peng Jin
- Department of Polymer Materials; School of Materials Science and Engineering, Tongji University; Shanghai 201804 People's Republic of China
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39
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Kong D, Xiao X. Rigid High Temperature Heat-Shrinkable Polyimide Tubes with Functionality as Reducer Couplings. Sci Rep 2017; 7:44936. [PMID: 28317905 PMCID: PMC5357908 DOI: 10.1038/srep44936] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2016] [Accepted: 02/15/2017] [Indexed: 11/15/2022] Open
Abstract
Flexible and semi-rigid heat-shrinkable tubes (HSTs) have been used in thousands of applications, and here rigid high temperature HSTs are reported for the first time. These rigid HSTs are prepared with shape memory polyimides possessing glass transition temperatures (Tgs) from 182 to 295 °C, and the relationships between Tg and their molecular structures are studied. The polyimide HSTs (PIHSTs) can fix expanded diameters and shrink back to original diameters very well, and the mechanisms of their heat-shrinkage performance are discussed. Their differences from commercially available HSTs in heat-shrinkage are also analyzed. They can withstand low temperature of -196 °C, much lower than those of other HSTs. The PIHSTs can also connect subjects of different sizes by heat-shrinkage and then fix them upon cooling like reducer couplings, and the possible mechanisms of their reducer coupling effect are analyzed. With their unique characteristics, PIHSTs will expand the application areas of HSTs enormously.
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Affiliation(s)
- Deyan Kong
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, No. 92 West Dazhi Street, Harbin 150001, PRC
| | - Xinli Xiao
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, No. 92 West Dazhi Street, Harbin 150001, PRC
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40
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Programming of One- and Two-Step Stress Recovery in a Poly(ester urethane). Polymers (Basel) 2017; 9:polym9030098. [PMID: 30970778 PMCID: PMC6431949 DOI: 10.3390/polym9030098] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2017] [Revised: 03/06/2017] [Accepted: 03/06/2017] [Indexed: 11/16/2022] Open
Abstract
This work demonstrates that phase-segregated poly(ester urethane) (PEU) with switching segments of crystallizable poly(1,4-butylene adipate) (PBA) can be programmed to generate two separate stress recovery events upon heating under constant strain conditions. For programming, two elongations are applied at different temperatures, followed by unloading and cooling. During the adjacent heating, two-step stress recovery is triggered. The results indicate that the magnitude of the stress recovery signals corresponds to the recovery of the two deformation stresses in reverse order. As demonstrated by further experiments, twofold stress recovery can be detected as long as the elongation at higher temperature exceeds the strain level of the deformation at lower temperature. Another finding includes that varying the lower deformation temperature enables a control over the stress recovery temperature and thus the implementation of so-called "temperature-memory effects". Moreover, exerting only one elongation during programming enables a heating-initiated one-step stress recovery close to the deformation temperature. Based on these findings, such polymers may offer new technological opportunities in the fields of active assembly when used as fastening elements and in functional clothing when utilized for compression stockings.
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41
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Xie R, Hu J, Guo X, Ng F, Qin T. Topographical Control of Preosteoblast Culture by Shape Memory Foams. ADVANCED ENGINEERING MATERIALS 2016. [DOI: 10.1002/adem.201600343] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Affiliation(s)
- Ruiqi Xie
- Institute of Textiles and Clothing; The Hong Kong Polytechnic University; Hung Hom Hong Kong 999077 China
| | - Jinlian Hu
- Smart Polymeric Materials Research Center for Biomedical Applications; Shenzhen Base; The Hong Kong Polytechnic University; Shen Zhen 518000 China
- Institute of Textiles and Clothing; The Hong Kong Polytechnic University; Hung Hom Hong Kong 999077 China
| | - Xia Guo
- Department of Rehabilitation Sciences; The Hong Kong Polytechnic University; Hung Hom Hong Kong 999077 China
| | - Frankie Ng
- Institute of Textiles and Clothing; The Hong Kong Polytechnic University; Hung Hom Hong Kong 999077 China
| | - Tingwu Qin
- Division of Stem Cell and Tissue Engineering; State Key Laboratory of Biotherapy/Collaborative Innovation Center for Biotherapy; West China Hospital, Sichuan University; Chengdu Sichuan 610000 China
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42
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Yan W, Fang L, Noechel U, Kratz K, Lendlein A. Influence of programming strain rates on the shape-memory performance of semicrystalline multiblock copolymers. ACTA ACUST UNITED AC 2016. [DOI: 10.1002/polb.24097] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Wan Yan
- Institute of Biomaterial Science and Berlin-Brandenburg Center for Regenerative Therapies; Helmholtz-Zentrum Geesthacht, Kantstr. 55 Teltow 14513 Germany
- Institute of Chemistry, University of Potsdam; 14476 Germany
| | - Liang Fang
- Institute of Biomaterial Science and Berlin-Brandenburg Center for Regenerative Therapies; Helmholtz-Zentrum Geesthacht, Kantstr. 55 Teltow 14513 Germany
| | - Ulrich Noechel
- Institute of Biomaterial Science and Berlin-Brandenburg Center for Regenerative Therapies; Helmholtz-Zentrum Geesthacht, Kantstr. 55 Teltow 14513 Germany
| | - Karl Kratz
- Institute of Biomaterial Science and Berlin-Brandenburg Center for Regenerative Therapies; Helmholtz-Zentrum Geesthacht, Kantstr. 55 Teltow 14513 Germany
| | - Andreas Lendlein
- Institute of Biomaterial Science and Berlin-Brandenburg Center for Regenerative Therapies; Helmholtz-Zentrum Geesthacht, Kantstr. 55 Teltow 14513 Germany
- Institute of Chemistry, University of Potsdam; 14476 Germany
- Joint Laboratory for Biomaterials and Regenerative Medicine; Tianjin University-Helmholtz-Zentrum Geesthacht; Kantstr. 55 Teltow 14513 Germany
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