Synthesis and Characterization of Wood Rigid Polyurethane Composites
Incorporating biodegradable reinforcement, such as wood particles, into rigid polyurethane foams (RPUFs) is among the alternatives to reduce their environmental impact. This study aims to assess the effect of different wood particles as reinforcement in RPUFs. Reinforced rigid polyurethane foams are...
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| Veröffentlicht in: | Materials 2022-06, Vol.15 (12), p.4316 |
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| creator | Bradai, Hamza Koubaa, Ahmed Bouafif, Hassine Langlois, Armand Samet, Basma |
| description | Incorporating biodegradable reinforcement, such as wood particles, into rigid polyurethane foams (RPUFs) is among the alternatives to reduce their environmental impact. This study aims to assess the effect of different wood particles as reinforcement in RPUFs. Reinforced rigid polyurethane foams are synthesized with milled wood particles of various forms and sizes and commercial polyol and isocyanate. The effect of fiber treatments and mechanical stirring on foams’ properties is also studied. Additional tests on polyisocyanurate foams (PIR) were undertaken to assess the effect of reinforcement on their properties. Mechanical properties are measured to investigate the impact of wood particle reinforcement on the foam. Confocal microscopy and Fourier-transform infrared spectroscopy (FTIR) showed the interaction between the wood fibers and the matrix. Despite the adhesion observed for some fibers, most of the cell walls of RPUFs were punctured by the rigid wood fibers, which explained the decrease in the compressive strength of the composites for manually mixed foams. Mechanical stirring proved to be an efficient method to enhance the reinforcement power of untreated fibers. RPUF foams’ properties showed similar changes when untreated wood flour was introduced to the formula, increasing compressive strength significantly. |
| doi_str_mv | 10.3390/ma15124316 |
| format | Article |
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This study aims to assess the effect of different wood particles as reinforcement in RPUFs. Reinforced rigid polyurethane foams are synthesized with milled wood particles of various forms and sizes and commercial polyol and isocyanate. The effect of fiber treatments and mechanical stirring on foams’ properties is also studied. Additional tests on polyisocyanurate foams (PIR) were undertaken to assess the effect of reinforcement on their properties. Mechanical properties are measured to investigate the impact of wood particle reinforcement on the foam. Confocal microscopy and Fourier-transform infrared spectroscopy (FTIR) showed the interaction between the wood fibers and the matrix. Despite the adhesion observed for some fibers, most of the cell walls of RPUFs were punctured by the rigid wood fibers, which explained the decrease in the compressive strength of the composites for manually mixed foams. Mechanical stirring proved to be an efficient method to enhance the reinforcement power of untreated fibers. RPUF foams’ properties showed similar changes when untreated wood flour was introduced to the formula, increasing compressive strength significantly.</description><identifier>ISSN: 1996-1944</identifier><identifier>EISSN: 1996-1944</identifier><identifier>DOI: 10.3390/ma15124316</identifier><identifier>PMID: 35744375</identifier><language>eng</language><publisher>Basel: MDPI AG</publisher><subject>Biodegradability ; Cellulose ; Composite materials ; Compressive strength ; Environmental impact ; Fourier transforms ; Insulation ; Isocyanates ; Lignin ; Mechanical properties ; Plastic foam ; Polyurethane foam ; Reinforcement ; Statistical analysis ; Stirring ; Wood fibers</subject><ispartof>Materials, 2022-06, Vol.15 (12), p.4316</ispartof><rights>2022 by the authors. Licensee MDPI, Basel, Switzerland. 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RPUF foams’ properties showed similar changes when untreated wood flour was introduced to the formula, increasing compressive strength significantly.</description><subject>Biodegradability</subject><subject>Cellulose</subject><subject>Composite materials</subject><subject>Compressive strength</subject><subject>Environmental impact</subject><subject>Fourier transforms</subject><subject>Insulation</subject><subject>Isocyanates</subject><subject>Lignin</subject><subject>Mechanical properties</subject><subject>Plastic foam</subject><subject>Polyurethane foam</subject><subject>Reinforcement</subject><subject>Statistical analysis</subject><subject>Stirring</subject><subject>Wood fibers</subject><issn>1996-1944</issn><issn>1996-1944</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2022</creationdate><recordtype>article</recordtype><sourceid>ABUWG</sourceid><sourceid>AFKRA</sourceid><sourceid>AZQEC</sourceid><sourceid>BENPR</sourceid><sourceid>CCPQU</sourceid><sourceid>DWQXO</sourceid><recordid>eNpdUdtKxDAQDaK4y7ovfkHBFxGqzaVt8iJIvYKgeMHHkE2TbZa2WZNUWL_eLLt4m4GZgTkczpkB4BBmpxiz7KwTMIeIYFjsgDFkrEghI2T31zwCU-8XWQyMIUVsH4xwXhKCy3wMLp9XfWiUNz4RfZ1UjXBCBuXMpwjG9onVyZu1dfJk5qZOHm27GpwKjehVUtluab0Jyh-APS1ar6bbPgGv11cv1W16_3BzV13cpxJDHFJNGcwJrYmSVM8QZQhijXEppWJSo1lZSEXqrC4woSjK1QyrEtYoVo0o0XgCzje8y2HWqVqqPjjR8qUznXArboXhfze9afjcfnCGECtyGgmOtwTOvg_KB94ZL1XbRj928BwVFGYElhmJ0KN_0IUdXB_tRVTJYq4POgEnG5R01nun9LcYmPH1f_jPf_AXeL-A6Q</recordid><startdate>20220618</startdate><enddate>20220618</enddate><creator>Bradai, Hamza</creator><creator>Koubaa, Ahmed</creator><creator>Bouafif, Hassine</creator><creator>Langlois, Armand</creator><creator>Samet, Basma</creator><general>MDPI AG</general><general>MDPI</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7SR</scope><scope>8FD</scope><scope>8FE</scope><scope>8FG</scope><scope>ABJCF</scope><scope>ABUWG</scope><scope>AFKRA</scope><scope>AZQEC</scope><scope>BENPR</scope><scope>BGLVJ</scope><scope>CCPQU</scope><scope>D1I</scope><scope>DWQXO</scope><scope>HCIFZ</scope><scope>JG9</scope><scope>KB.</scope><scope>PDBOC</scope><scope>PIMPY</scope><scope>PQEST</scope><scope>PQQKQ</scope><scope>PQUKI</scope><scope>PRINS</scope><scope>7X8</scope><scope>5PM</scope><orcidid>https://orcid.org/0000-0002-7895-1901</orcidid></search><sort><creationdate>20220618</creationdate><title>Synthesis and Characterization of Wood Rigid Polyurethane Composites</title><author>Bradai, Hamza ; 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This study aims to assess the effect of different wood particles as reinforcement in RPUFs. Reinforced rigid polyurethane foams are synthesized with milled wood particles of various forms and sizes and commercial polyol and isocyanate. The effect of fiber treatments and mechanical stirring on foams’ properties is also studied. Additional tests on polyisocyanurate foams (PIR) were undertaken to assess the effect of reinforcement on their properties. Mechanical properties are measured to investigate the impact of wood particle reinforcement on the foam. Confocal microscopy and Fourier-transform infrared spectroscopy (FTIR) showed the interaction between the wood fibers and the matrix. Despite the adhesion observed for some fibers, most of the cell walls of RPUFs were punctured by the rigid wood fibers, which explained the decrease in the compressive strength of the composites for manually mixed foams. 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| source | MDPI - Multidisciplinary Digital Publishing Institute; PubMed Central(OpenAccess); Free Full-Text Journals in Chemistry; EZB Electronic Journals Library; PubMed Central Open Access |
| subjects | Biodegradability Cellulose Composite materials Compressive strength Environmental impact Fourier transforms Insulation Isocyanates Lignin Mechanical properties Plastic foam Polyurethane foam Reinforcement Statistical analysis Stirring Wood fibers |
| title | Synthesis and Characterization of Wood Rigid Polyurethane Composites |
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