Tailoring the properties of waterborne polyurethanes by incorporating different content of poly(dimethylsiloxane)

Stefanović, Ivan S.; Džunuzović, Jasna V.; Džunuzović, Enis S.; Brzić, Saša; Jasiukaitytė-Grojzdek, Edita; Basagni, Andrea; Marega, Carla

doi:10.1016/j.porgcoat.2021.106474

Cited by 17 publications

(13 citation statements)

References 43 publications

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“…The second degradation step at around 400 • C is due to the scission of the soft segment. The third degradation step above 500 • C may correspond to the depolymerization of residual components [47]. These results indicate that increasing the PDMS content improves the thermal stability of the PS-WPU samples.…”

Section: Tga and Dtg Analysesmentioning

confidence: 80%

Preparation of Polydimethylsiloxane-Modified Waterborne Polyurethane Coatings for Marine Applications

Kim

et al. 2021

Polymers

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A series of waterborne polyurethane dispersions (WPUs) modified with hydroxyl-terminated polydimethylsiloxane (PDMS) were prepared by incorporating PDMS into the soft segments of polyurethane chains. The structural characteristics of the prepared samples were analyzed by Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and particle size analysis (PSA). The effect of PDMS content on the thermal and mechanical properties of PDMS-modified waterborne polyurethanes (PS-WPU) was investigated. In addition, the water resistance and dimensional stability of the PS-WPU were investigated by measuring its water absorption ratio and water contact angle along with universal testing machine measurements.

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Section: Tga and Dtg Analysesmentioning

confidence: 80%

Preparation of Polydimethylsiloxane-Modified Waterborne Polyurethane Coatings for Marine Applications

Kim

et al. 2021

Polymers

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“…As shown in Figure , the chemical shift of the hydrogen proton in Si–CH 3 of HPSi-NH 2 appeared at ∼0.00 ppm and the hydrogen proton in Si–OH appeared at 3.85 ppm, respectively. Combined with the results of FTIR analysis, it was proved that HPSi-NH 2 was successfully synthesized.…”

Section: Resultsmentioning

confidence: 87%

Triethoxysilane End-Functional Branched Waterborne Polyurethane Adhesives for Leather Substrates

Long-fang

Niu

et al. 2023

ACS Appl. Polym. Mater.

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In order to improve the adhesion and water resistance of waterborne polyurethane (WPU) adhesive, a kind of amino-terminated hyperbranched organosilicon (HPSi-NH2) was first synthesized by using trimethylchlorosilane, diethoxydimethylsilane, and γ-aminopropyltriethoxysilane (KH550) as raw materials. Then, HPSi-NH2, as the cross-linking agent, was used to modify the polyurethane prepolymer to obtain HPSi-NH2-modified WPU (HSiPU). The single-factor experiment results showed that when the amount of HPSi-NH2 was 2.0 wt %, the adhesion properties of HSiPU-2 were the best. Compared with the HSiPU-0 film, the water absorption rate of the HSiPU-2 film decreased by 10.9%, the water contact angle increased by 26.3°, the tensile strength increased by 10.1 MPa, and the elongation at break increased from 630.7 to 813.0%. HSiPU adhesive was used in the bonding of the goat leather substrate, and the results showed that the peel strength of leather bonded by HSiPU-2 was increased from 1.38 to 3.15 N/mm, and the maximum peel force was increased from 1.67 to 5.51 N/mm, which indicated that the bond strength of HSiPU adhesive with different contents of HPSi-NH2 can be used for bonding substrates with different cohesion strengths.

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“…However, when the silicon content exceeds 10% of the acrylic monomer mass, the water contact angle decreases, because as the silicon content continues to increase, on the one hand, the effective enrichment of silicon on the surface reaches the maximum value, a critical micelle concentration appears and the reduction of surface energy gradually tends to level off, so the water contact angle no longer increases. On the other hand, when the degree of cross-linking of the polymer increases to a certain extent, the potential resistance effect is obvious, which will further reduce the polymeric grafting of polyurethane and acrylate resin; thus, the water contact angle decreases [ 40 , 41 ]. Therefore, the addition of a certain amount of A172 can enhance the surface hydrophobicity of coatings to a certain extent.…”

Section: Resultsmentioning

confidence: 99%

Preparation and Properties of Hydrophobic Polyurethane Based on Silane Modification

Zhang

et al. 2023

Polymers

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Waterborne coatings have obtained more and more attention from researchers with increasing concerns in environmental protection, and have the advantages of being green, environmentally friendly and safe. However, the introduction of hydrophilic groups leads to lower hydrophobicity and it is difficult to meet the requirements of complex application environments. Herein, we proposed an optimization approach of waterborne polyurethane (WPU) with vinyl tris(β-methoxyethoxy) silane (A172), and it was found that the surface roughness, mechanical properties, thermal stability and water resistance of WPU will be increased to a certain extent with the addition of A172. Moreover, the hydrophobicity of the coating film is best when the silicon content is 10% of the acrylic monomer mass and the water contact angle reaches 100°, which could exceed two-thirds of the research results in the last decade. Therefore, our study can provide some theoretical basis for the research of hydrophobic polyurethane coatings.

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Tailoring the properties of waterborne polyurethanes by incorporating different content of poly(dimethylsiloxane)

Cited by 17 publications

References 43 publications

Preparation of Polydimethylsiloxane-Modified Waterborne Polyurethane Coatings for Marine Applications

Preparation of Polydimethylsiloxane-Modified Waterborne Polyurethane Coatings for Marine Applications

Triethoxysilane End-Functional Branched Waterborne Polyurethane Adhesives for Leather Substrates

Preparation and Properties of Hydrophobic Polyurethane Based on Silane Modification

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