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Rutkowski P, Kwiecień K, Berezicka A, Sułowska J, Kwiecień A, Śliwa-Wieczorek K, Azinovic B, Schwarzkopf M, Pondelak A, Pečnik JG, Szumera M. Thermal Stability and Heat Transfer of Polyurethanes for Joints Applications of Wooden Structures. Molecules 2024; 29:3337. [PMID: 39064914 PMCID: PMC11279557 DOI: 10.3390/molecules29143337] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2024] [Revised: 07/02/2024] [Accepted: 07/12/2024] [Indexed: 07/28/2024] Open
Abstract
Wood characterized by desired mechanical properties and wood joining material is essential for creating wooden structures. The polymer adhesives are suitable for such applications due to the possibility of energy dissipation from stresses generated by wooden structures and the elimination of thermal bridging, which are common problems in metal joining materials. This research focuses on the thermophysical properties of the laboratory-prepared flexible and rigid polyurethanes to select an appropriate polymer adhesive. Our results showed that the highest thermal stability was in the case of the new PSTF-S adhesive, which reached 230 °C, but the lowest mass loss in the air environment was around 54% for the PS material. The mean thermal expansion coefficient for F&R PU adhesives was 124-164∙10-6 K-1. The thermal diffusivity of examined adhesives varied between 0.100 and 0.180 mm2s-1. The thermal conductivity, depending on the type of polyurethane, was in the 0.13-0.29 W∙m-1∙K-1 range. The relative decrease in thermal diffusivity after heating the adhesives to 150 °C was from 2% for materials with the lowest diffusivity to 23% for the PU with the highest value of heat transfer. It was found that such data can be used to simulate wooden construction joints in future research.
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Affiliation(s)
- Paweł Rutkowski
- Department of Ceramics and Refractories, Faculty of Materials Science and Ceramics, AGH University of Krakow, al. A. Mickiewicza 30, 30-059 Krakow, Poland; (A.B.); (J.S.)
| | - Konrad Kwiecień
- Department of Biomaterials, Faculty of Materials Science and Ceramics, AGH University of Krakow, al. A. Mickiewicza 30, 30-059 Krakow, Poland;
| | - Anna Berezicka
- Department of Ceramics and Refractories, Faculty of Materials Science and Ceramics, AGH University of Krakow, al. A. Mickiewicza 30, 30-059 Krakow, Poland; (A.B.); (J.S.)
| | - Justyna Sułowska
- Department of Ceramics and Refractories, Faculty of Materials Science and Ceramics, AGH University of Krakow, al. A. Mickiewicza 30, 30-059 Krakow, Poland; (A.B.); (J.S.)
| | - Arkadiusz Kwiecień
- Chair of Structural Mechanics and Material Mechanics, Faculty of Civil Engineering, Cracow University of Technology, Warszawska 24 Street, 31-155 Krakow, Poland;
| | - Klaudia Śliwa-Wieczorek
- Chair of Bridge, Metal and Wooden Structures, Faculty of Civil Engineering, Cracow University of Technology, Warszawska 24 Street, 31-155 Krakow, Poland;
| | - Boris Azinovic
- Slovenian National Building and Civil Engineering Institute, Dimičeva 12, 1000 Ljubljana, Slovenia; (B.A.); (A.P.)
| | | | - Andreja Pondelak
- Slovenian National Building and Civil Engineering Institute, Dimičeva 12, 1000 Ljubljana, Slovenia; (B.A.); (A.P.)
| | | | - Magdalena Szumera
- Department of Ceramics and Refractories, Faculty of Materials Science and Ceramics, AGH University of Krakow, al. A. Mickiewicza 30, 30-059 Krakow, Poland; (A.B.); (J.S.)
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Ozimek J, Pielichowski K. Recent Advances in Polyurethane/POSS Hybrids for Biomedical Applications. Molecules 2021; 27:molecules27010040. [PMID: 35011280 PMCID: PMC8746980 DOI: 10.3390/molecules27010040] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2021] [Revised: 12/17/2021] [Accepted: 12/19/2021] [Indexed: 11/16/2022] Open
Abstract
Advanced organic-inorganic materials-composites, nanocomposites, and hybrids with various compositions offer unique properties required for biomedical applications. One of the most promising inorganic (nano)additives are polyhedral oligomeric silsesquioxanes (POSS); their biocompatibility, non-toxicity, and phase separation ability that modifies the material porosity are fundamental properties required in modern biomedical applications. When incorporated, chemically or physically, into polyurethane matrices, they substantially change polymer properties, including mechanical properties, surface characteristics, and bioactivity. Hence, this review is dedicated to POSS-PU composites that have recently been developed for applications in the biomedical field. First, different modes of POSS incorporation into PU structure have been presented, then recent developments of PU/POSS hybrids as bio-active composites for scaffolds, cardiovascular stents, valves, and membranes, as well as in bio-imaging and cancer treatment, have been described. Finally, characterization and methods of modification routes of polyurethane-based materials with silsesquioxanes were presented.
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Vinay CV, Varma DSM, Chandan MR, Sivabalan P, Jaiswal AK, Swetha S, Sionkowska A, Kaczmarek B. Study of castor oil‐based auxetic polyurethane foams for cushioning applications. POLYM INT 2021. [DOI: 10.1002/pi.6259] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Chaithanya V Vinay
- School of Mechanical Engineering (SMEC), VIT Vellore India
- Centre for Biomaterials Cellular & Molecular Theranostics (CBCMT), VIT Vellore India
| | - DS Mohan Varma
- School of Mechanical Engineering (SMEC), VIT Vellore India
- Centre for Biomaterials Cellular & Molecular Theranostics (CBCMT), VIT Vellore India
| | - Mohammed R Chandan
- Colloids and Polymer Research Group School of Chemical Engineering (SCHEME), VIT Vellore India
| | - Ponsubha Sivabalan
- Centre for Biomaterials Cellular & Molecular Theranostics (CBCMT), VIT Vellore India
| | - Amit K Jaiswal
- Centre for Biomaterials Cellular & Molecular Theranostics (CBCMT), VIT Vellore India
| | - Sai Swetha
- Colloids and Polymer Research Group School of Chemical Engineering (SCHEME), VIT Vellore India
| | - Alina Sionkowska
- Department of Biomaterials and Cosmetic Chemistry Faculty of Chemistry, Nicolaus Copernicus University in Torun Torun Poland
| | - Beata Kaczmarek
- Department of Biomaterials and Cosmetic Chemistry Faculty of Chemistry, Nicolaus Copernicus University in Torun Torun Poland
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Yang L, Du DY, Zhang JW, Tang C. A comparative simulation: Difference between chemical grafting and physical doping of cellulose by using polysilsesquioxane. CHINESE J CHEM PHYS 2021. [DOI: 10.1063/1674-0068/cjcp2004058] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
Affiliation(s)
- Lu Yang
- College of Engineering and Technology, Southwest University, Chongqing 400715, China
| | - Dong-yuan Du
- College of Engineering and Technology, Southwest University, Chongqing 400715, China
| | - Jing-wen Zhang
- College of Engineering and Technology, Southwest University, Chongqing 400715, China
| | - Chao Tang
- College of Engineering and Technology, Southwest University, Chongqing 400715, China
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Członka S, Strąkowska A, Pospiech P, Strzelec K. Effects of Chemically Treated Eucalyptus Fibers on Mechanical, Thermal and Insulating Properties of Polyurethane Composite Foams. MATERIALS 2020; 13:ma13071781. [PMID: 32290106 PMCID: PMC7179037 DOI: 10.3390/ma13071781] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/20/2020] [Revised: 04/06/2020] [Accepted: 04/07/2020] [Indexed: 02/05/2023]
Abstract
In this work, rigid polyurethane (PUR) foams were prepared by incorporating 2 wt% of eucalyptus fibers. The eucalyptus fibers were surface-modified by maleic anhydride, alkali, and silane (triphenylsilanol) treatment. The impact of the modified eucalyptus fibers on the mechanical, thermal, and fire performances of polyurethane foams was analyzed. It was observed that the addition of eucalyptus fibers showed improved mechanical and thermal properties and the best properties were shown by silane-treated fibers with a compressive strength of 312 kPa and a flexural strength of 432 kPa. Moreover, the thermal stability values showed the lowest decline for polyurethane foams modified with the silane-treated fibers, due to the better thermal stability of such modified fibers. Furthermore, the flame resistance of polyurethane foams modified with the silane-treated fibers was also the best among the studied composites. A cone calorimetry test showed a decrease in the peak of heat release from 245 to 110 kW∙m−2 by the incorporation of silane-treated fibers. Furthermore, total heat release and total smoke release were also found to decrease remarkably upon the incorporation of silane-treated fibers. The value of limiting oxygen index was increased from 20.2% to 22.1%. Char residue was also found to be increased from 24.4% to 28.3%. It can be concluded that the application of chemically modified eucalyptus fibers has great potential as an additive to incorporate good mechanical, thermal, and fire properties in rigid polyurethane foams.
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Affiliation(s)
- Sylwia Członka
- Institute of Polymer and Dye Technology, Faculty of Chemistry, Lodz University of Technology, Stefanowskiego 12/16, 90-924 Lodz, Poland; (A.S.); (K.S.)
- Correspondence:
| | - Anna Strąkowska
- Institute of Polymer and Dye Technology, Faculty of Chemistry, Lodz University of Technology, Stefanowskiego 12/16, 90-924 Lodz, Poland; (A.S.); (K.S.)
| | - Piotr Pospiech
- Centre of Papermaking and Printing, Lodz University of Technology, Wolczanska 223, 90-924 Lodz, Poland;
| | - Krzysztof Strzelec
- Institute of Polymer and Dye Technology, Faculty of Chemistry, Lodz University of Technology, Stefanowskiego 12/16, 90-924 Lodz, Poland; (A.S.); (K.S.)
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