The Effect of Silica-Filler on Polyurethane Adhesives Based on Renewable Resource for Wood Bonding

Mamiński, M.; Więcław-Midor, Anna; Parzuchowski, Paweł G.

doi:10.3390/polym12102177

Cited by 13 publications

(4 citation statements)

References 49 publications

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“…[1][2][3][4] Given their very good ultraviolet resistance and good adhesion to various substrates, use of PU coatings in various industrial applications including the marine, automotive, and aeronautical sectors, as architectural coatings, and wind turbines. 2,[5][6][7][8][9] PU coatings are applied on surfaces exposed to harsh weather conditions, such as high humidity conditions, freezing rain and snow, and subfreezing temperatures.…”

Section: Introductionmentioning

confidence: 99%

New insights into tailoring physicochemical properties for optimizing the anti‐icing behavior of polyurethane coatings

Bakhshandeh,

Sobhani,

Jafari

et al. 2023

J of Applied Polymer Sci

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The most popular topcoat in the coatings industry, polyurethane (PU), still lacks an understanding of ice‐related phenomena and hence achieving an icephobic PU‐based coating has remained an important unresolved issue. This work presents fresh perspectives on how factors including chemical characteristics, cross‐link density, and mechanical characterization impact the anti‐icing capabilities and ice‐adhesion of PU coatings. In this regard, the effects of the of aforementioned coatings having various crosslink densities on wettability, ice formation, and ice adhesion were assessed via multiple approaches. Two acrylic polyols with different hydroxyl content and two commonly used aliphatic polyisocyanates with different %NCOs were utilized to fabricate the PU coatings. In addition, coatings were designed with different stoichiometric ratios providing a route to various crosslink densities and mechanical properties. Wettability characteristics were investigated using water contact angle, contact angle hysteresis, and sliding angle. The roles of urethane linkages and hydrogen‐bond formation between water molecules and urethane composition of PU coatings on ice nucleation and ice adhesion were studied through DSC, push‐off, and centrifugal tests. Mechanical characteristics and surface roughness of the coatings were investigated by tensile test and optical profilometer, respectively.

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Section: Introductionmentioning

confidence: 99%

New insights into tailoring physicochemical properties for optimizing the anti‐icing behavior of polyurethane coatings

Bakhshandeh,

Sobhani,

Jafari

et al. 2023

J of Applied Polymer Sci

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“…Their importance grows each year; thus, unsurprisingly, the number of PUR-manufactured products steadily increases. PUR-based materials find many applications in critical industry sectors such as furniture, , automotive, , electronics, , construction, − footwear, − coatings, − varnishes, − packages, − adhesives, − and others. , …”

Section: Introductionmentioning

confidence: 99%

Poly(Urea-Urethane) Elastomers with Fire-Retardant and Tensile Properties Enhanced by a Built-In Phosphorus Derivative

Kowalczyk

Grochowska

Debowski

et al. 2023

ACS Appl. Polym. Mater.

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One of the most popular materials used in the plastics industry is polyurethane (PUR). In recent years, these plastics have gained attention due to their ease of processing, their simple, relatively inexpensive manufacturing process, and, above all, their properties, which allow PURs to be used as rigid and flexible foams, flexible solid products, adhesives, and biomedical materials. The primary purpose of this work was to study the chemical and/ or physical modifications of urethane prepolymers, resulting in enhanced mechanical properties and reduced flammability. A crosslinking agent based on triesters of phosphoric acid (PPEG) was synthesized and used as a component to produce PUR and poly(urea-urethane)s (PUUR). Commercially available polyether diols, with average molar masses of 450 and 2000 g•mol −1 , and aromatic diisocyanates were used. In the further course of work, thermal properties, flammability, and selected mechanical parameters of the obtained materials were characterized. The addition of PPEG allowed one to achieve products exhibiting better tensile strength, up to 19-fold improvement in properties from 0.51 to 9.71 MPa, and increased thermal stability of materials. Moreover, the PPEG derivative has the ability to reduce the flammability of materials, which has been proven during tests on the calorimeter, where there is a decrease in the heat release capacity (HRC) and the peak heat release rate (peak HRR) compared to the unmodified PUR reference sample by 44.34 and 46.70%, respectively, for the material with the highest derivative content.

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“…Glycerol is a low-cost and non-toxic chemical that can function as a plasticizer, providing an alternative for the generation of bio-based adhesives (Milotoskyi et al 2019;Azerêdo et al 2022). Unfortunately, pure glycerol gives a low shear strength bonding of wood (Mamiński et al 2011). It must be combined with other chemicals, such as citric acid mentioned above.…”

Section: Introductionmentioning

confidence: 99%

“…Tannins bond with the glycerol structure to form ether linkages (Segovia et al 2020;Oktay et al 2021). Similar to glycerol, other polyhydric alcohol-based liquefaction products need to be combined, for good performance, with isocyanate-based chemicals such as hexamethylene diisocyanate (HDI) or polymeric methylene diphenyl diisocyanate (pMDI), for the effective production of wood adhesives (Mamiński et al 2011;Jiang et al 2021). The composition of liquefied biomass products depends on the chemical composition of the biomass itself and the specific type of liquefying reagent used (Jiang et al 2022), and the liquefaction process is a great way to introduce natural phenolic compounds into glycerol.…”

Section: Introductionmentioning

confidence: 99%

Glycerol-based liquefied palm kernel shell product and its blend with citric acid as bio-based wood adhesive

Choowang,

Rodpan,

Raknarong

et al. 2023

BioRes

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Concerns for the environment and for human health have become critical factors that motivate creating bio-based wood adhesives. Therefore, this study proposes replacing toxic chemicals with alternative adhesives. In the first step, glycerol was added to the natural phenolic compounds from liquefaction of palm kernel shell (PKS), having a high content of lignin. The obtained glycerol-based liquefied PKS, and its blend with citric acid, were tested for bonding in a study on the effects of hot-pressing conditions (temperature and time). The results revealed that the liquefaction system in this study achieved an 83% conversion of the PKS components into glycerol-based liquefaction. According to the Fourier transform infrared and carbon-13 nuclear magnetic resonance analyses, the glycerol-based PKS contained lignin derivatives and furan products. This accounted for its great performance in bonding rubberwood veneers. The tensile shear strength was improved by blending with 15% citric acid, especially when applying the high 190 °C pressing temperature for 15 min.

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The Effect of Silica-Filler on Polyurethane Adhesives Based on Renewable Resource for Wood Bonding

Cited by 13 publications

References 49 publications

New insights into tailoring physicochemical properties for optimizing the anti‐icing behavior of polyurethane coatings

New insights into tailoring physicochemical properties for optimizing the anti‐icing behavior of polyurethane coatings

Poly(Urea-Urethane) Elastomers with Fire-Retardant and Tensile Properties Enhanced by a Built-In Phosphorus Derivative

Glycerol-based liquefied palm kernel shell product and its blend with citric acid as bio-based wood adhesive

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