Preparation of Polydimethylsiloxane-Modified Waterborne Polyurethane Coatings for Marine Applications

Kim, Min-Gu; Jo, Kyoung-Il; Kim, Eunji; Park, Jae-Hyung; Ko, Jae-Wang; Lee, Jin Hong

doi:10.3390/polym13244283

Cited by 30 publications

(18 citation statements)

References 54 publications

(62 reference statements)

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“…Therefore, polysiloxane-based polyurethane materials have great development and application prospects. These modified materials can overcome the poor mechanical properties of polysiloxanes, rendering them applicable to textiles [ 38 ], medical materials [ 39 , 40 , 41 ], adhesives [ 42 ], and coatings [ 43 , 44 , 45 ], among others. Compared with aromatic isocyanates [ 46 ], aliphatic 4,4-dicyclohexylmethane diisocyanate (HMDI) and isophorone diisocyanate (IPDI) are ideal materials for synthesizing aliphatic polyurethanes for biomedical applications, owing to their nontoxicity and yellowing resistance [ 47 , 48 , 49 ].…”

Section: Introductionmentioning

confidence: 99%

Polysiloxane-Based Polyurethanes with High Strength and Recyclability

Wang

Bai

Sun

et al. 2022

IJMS

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Polysiloxanes have attracted considerable attention in biomedical engineering, owing to their inherent properties, including good flexibility and biocompatibility. However, their low mechanical strength limits their application scope. In this study, we synthesized a polysiloxane-based polyurethane by chemical copolymerization. A series of thermoplastic polysiloxane-polyurethanes (Si-TPUs) was synthesized using hydroxyl-terminated polydimethylsiloxane containing two carbamate groups at the tail of the polymer chains 4,4′-dicyclohexylmethane diisocyanate (HMDI) and 1,4-butanediol as raw materials. The effects of the hard-segment content and soft-segment number average molecular weight on the properties of the resulting TPUs were investigated. The prepared HMDI-based Si-TPUs exhibited good microphase separation, excellent mechanical properties, and acceptable repeatable processability. The tensile strength of SiTPU-2K-39 reached 21.5 MPa, which is significantly higher than that of other flexible polysiloxane materials. Moreover, the tensile strength and breaking elongation of SiTPU-2K-39 were maintained at 80.9% and 94.6%, respectively, after three cycles of regeneration. The Si-TPUs prepared in this work may potentially be used in gas separation, medical materials, antifouling coatings, and other applications.

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Section: Introductionmentioning

confidence: 99%

Polysiloxane-Based Polyurethanes with High Strength and Recyclability

Wang

Bai

Sun

et al. 2022

IJMS

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“…Moreover, the signals around 532.6 and 533.4 eV are due to C-O and Si-O-C, respectively [ 21 ]. The intensity of the Si-O-C bond increases more in Si-Cot_Dip/O 2 sample than that in the Si-Cot_Plasma/O 2 sample [ 40 , 41 ].…”

Section: Resultsmentioning

confidence: 99%

Effect of Oxygen Plasma Pre-Treatment on the Surface Properties of Si-Modified Cotton Membranes for Oil/Water Separations

2022

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Hydrophobic and oleophilic Si-based cotton fabrics have recently gained a lot of attention in oil/water separation due to their high efficiency. In this study, we present the effect of O2 plasma pre-treatment on the final properties of two Si-based cotton membranes obtained from dip coating and plasma polymerization, using polydimethylsiloxane (PDMS) as starting polymeric precursor. The structural characterizations indicate the presence of Si bond on both the modified cotton surfaces, with an increase of the carbon bond, assuring the success in surface modification. On the other hand, employing O2 plasma strongly changes the cotton morphology, inducing specific roughness and affecting the hydrophobicity durability and separation efficiency. In particular, the wettability has been retained after 20 laundry tests at 40 °C and 80 °C, and, for separation efficiency, even after 30 cycles, an improvement in the range of 10–15%, both at room temperature and at 90 °C can be observed. These results clearly demonstrate that O2 plasma pre-treatment, an eco-friendly, non-toxic, solvent-free, and one-step method for inducing specific functionalities on surfaces, is very effective in enhancing the oil/water separation properties for Si-based cotton membranes, especially in combination with plasma polymerization procedure for Si-based deposition.

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“…Generally, the hydrophobic PDMS chains grafted on the PU polymers typically were curled inside the latex particles after WPU-g-PDMS x dispersed in water, while the hydrophilic groups (neutralized carboxyl groups from the chain extender of DMPA) wrapped around the latex particles. 44 The degree of microphase separation of the latex particles grew as the amount of PDMS increased, which caused an increase in free volume 45 and, ultimately, a bigger particle size. Furthermore, the latex color and particle size are connected.…”

Section: Preparation and Characterization Of Wpu-g-pdms Dispersionmentioning

confidence: 99%

Bio-Based Waterborne Polyurethane Coatings with High Transparency, Antismudge and Anticorrosive Properties

Lei

Zhou

et al. 2023

ACS Appl. Mater. Interfaces

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Green and environment-friendly preparation are of the utmost relevance to the development of transparent antismudge coatings. To prepare a waterborne polyurethane (WPU) coating with antismudge property, it is challenging to balance the stability of dispersion and the antismudge property of coating. Herein, we prepare a transparent bio-based WPU coating grafted with a minor proportion of poly(dimethylsiloxane) (WPU-g-PDMS) using renewable castor oil, monocarbinol-terminated PDMS, hexamethylene diisocyanate trimer, and 2,2-bis(hydroxymethyl)propionic acid as raw materials. Effects of the dosage of monocarbinol-terminated PDMS, the curing temperature, and the curing time on the antismudge performance were studied. Results showed that rigorous stirring (3000 rpm) is necessary to obtain a stable WPU-g-PDMS dispersion with a storage time longer than 6 months. A high curing temperature (>160 °C) and a period of curing time (>1 h) are indispensable to obtain the excellent antismudge property because they would facilitate the grafted low-surface-tension PDMS chains to migrate from the interior to the coating surface. The facts that simulated contaminated liquids such as water, HCl solution, NaOH solution, artificial blood, and tissue fluid could slide off easily and cleanly, and marker ink lined on the coating surface could shrink, indicated that the WPU-g-PDMS coating has good antismudge properties, which could be self-compensated shortly after deterioration. Due to the high cross-linking degree caused by multifunctional polyol and isocyanate, the WPU-g-PDMS coating has high hardness and good anticorrosive performance. The antismudge functionalization and waterborne technology of bio-based polyurethane coatings proposed in this work could be a promising contribution to the green and sustainable development of functional coatings. This kind of WPU-g-PDMS coating is expected to protect and decorate electronic screens, vehicles, and buildings, especially endoscopes.

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Preparation of Polydimethylsiloxane-Modified Waterborne Polyurethane Coatings for Marine Applications

Cited by 30 publications

References 54 publications

Polysiloxane-Based Polyurethanes with High Strength and Recyclability

Polysiloxane-Based Polyurethanes with High Strength and Recyclability

Effect of Oxygen Plasma Pre-Treatment on the Surface Properties of Si-Modified Cotton Membranes for Oil/Water Separations

Bio-Based Waterborne Polyurethane Coatings with High Transparency, Antismudge and Anticorrosive Properties

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