A novel dual-layer approach towards omniphobic polyurethane coatings

Khan, Fahad; Khan, Ajmir; Tuhin, Mohammad O.; Rabnawaz, Muhammad; Li, Zhao; Naveed, Muhammad

doi:10.1039/c9ra04923a

Cited by 27 publications

(13 citation statements)

References 39 publications

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“…In these cases, the self-healing could be readily controlled by adjusting the temperature. Various kinds of novel self-healing polyurea-based polymeric materials can be synthesized by this approach [ 69 , 70 , 71 ]. As a result, CAN polyurea-based materials are envisioned to have substantial applications in smart surfaces, smart electronics, and 3D printing [ 72 ].…”

Section: Introductionmentioning

confidence: 99%

Covalent Adaptable Network and Self-Healing Materials: Current Trends and Future Prospects in Sustainability

2020

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This work estimates that if the growth of polymer production continues at its current rate of 5% each year, the current annual production of 395 million tons of plastic will exceed 1000 million tons by 2039. Only 9% of the plastics that are currently produced are recycled while most of these materials end up in landfills or leak into oceans, thus creating severe environmental challenges. Covalent adaptable networks (CANs) materials can play a significant role in reducing the burden posed by plastics materials on the environment because CANs are reusable and recyclable. This review is focused on recent research related to CANs of polycarbonates, polyesters, polyamides, polyurethanes, and polyurea. In particular, trends in self-healing CANs systems, the market value of these materials, as well as mechanistic insights regarding polycarbonates, polyesters, polyamides, polyurethanes, and polyurea are highlighted in this review. Finally, the challenges and outlook for CANs are described herein.

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Section: Introductionmentioning

confidence: 99%

Covalent Adaptable Network and Self-Healing Materials: Current Trends and Future Prospects in Sustainability

2020

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“…[10][11][12][13][14][15] One of the key focus is the use of benign polydimethylsiloxane (PDMS) as an alternative to PFAS because PDMS is known for imparting water and oil repellent properties while still acceptable for food contact applications. [16][17][18][19][20][21][22] In a recent breakthrough study, we reported the fabrication of water-and grease-resistant coating using Chitosan-grafted-PDMS (Chitosan-g-PDMS), and the coated paper was 100% recyclable by washing the coating off. 12 From a practical perspective, chitosan-g-PDMS system is relatively expensive while at the same time, chitosan has a low availability due to complicated purification processes.…”

Section: Introductionmentioning

confidence: 99%

Oil‐ and water‐resistant paper substrate using blends of chitosan‐graft‐polydimethylsiloxane and poly(vinyl alcohol)

Nair

Kansal

Khan

et al. 2021

J of Applied Polymer Sci

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Reported herein is an economical, plastic-and fluorine-free coating approach for oil and water repellent paper substrates using blends of poly(vinyl alcohol) and chitosan-graft-polydimethylsiloxane copolymer. The obtained coated paper showed good water-resistance, as evidenced by its low Cobb60 values of 20 ± 2.1 g/m 2 and high water contact angles of 119 ± 6.3. The kit rating of the coated paper was 7.6/12, indicating decent grease-resistant properties as compared to the kit value of 0/12 for the uncoated paper. The coated paper is also repulpable as demonstrated by the complete washing off the coating from the coated paper. Giving the cost-effective nature of the coating materials and good water and oil-resistant properties of the coated paper, the approach developed here is commercially viable, and will offer a multitude of environmental benefits such as the elimination of microplastic-and PFAS problems associated with existing paper coatings.

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“…Recently, our group has developed chitosan‐ graft ‐silicone oil coatings for paper with good water and oil repellent properties 22–26 . Silicone oil was chosen because of its relatively food safe nature and exceptional water and oil repellent properties that have been demonstrated in various coatings 27–34 . However, silicone oils are nonbiodegradable and are relatively expensive.…”

Section: Introductionmentioning

confidence: 99%

Fabrication of oil‐ and water‐resistant paper without creating microplastics on disposal

Kansal

Rabnawaz

2020

J of Applied Polymer Sci

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The proliferation of microplastics in the ocean and other water bodies is becoming an alarming issue. The development of plastic-free water-and oilresistant paper can contribute toward mitigating this problem. Herein we report a plastic-free paper coating derived from chitosan and sunflower oil. Chitosan grafted sunflower oil paper coatings were prepared via the ring opening of the partially epoxidized sunflower oil with chitosan. The product of these reactions was characterized by nuclear magnetic resonance and infrared spectroscopy techniques. The sunflower oil grafted chitosan solution was coated onto a Kraft paper. The Cobb 60 and kit rating values were determined to be 8.00 g/m 2 and 7.66, respectively, for the optimal formulations. Meanwhile, the water contact angle was found to be 94.0 ± 1.6 after 30 s. Scanning electron microscopy analysis was employed to gain insight regarding the changes that occurred on the paper surface at the microscopic level.

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A novel dual-layer approach towards omniphobic polyurethane coatings

Abstract: Omniphobic surfaces have a plethora of applications ranging from household paints to sensors.

Cited by 27 publications

References 39 publications

Covalent Adaptable Network and Self-Healing Materials: Current Trends and Future Prospects in Sustainability

Covalent Adaptable Network and Self-Healing Materials: Current Trends and Future Prospects in Sustainability

Oil‐ and water‐resistant paper substrate using blends of chitosan‐graft‐polydimethylsiloxane and poly(vinyl alcohol)

Fabrication of oil‐ and water‐resistant paper without creating microplastics on disposal

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