Introduction of bio-based hard segment as an alternative strategy to environmentally friendly polyurethane coated urea

Dong, Shuqi; Pang, Minhui; Li, Hongyan; Zou, Guoyuan; Liang, Lina; Li, Lixia

doi:10.1016/j.indcrop.2023.117164

Cited by 3 publications

(2 citation statements)

References 43 publications

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“…Vegetable oils and their derivatives are increasingly recognized as crucial renewable resources for biobased chemicals and polyurethane materials. − Notably, castor oil (CO) is garnering attention due to its unique composition, featuring both carbon–carbon double bonds and hydroxyl groups amenable to chemical modification. − With an average functionality of 2.7 hydroxyl groups, CO exhibits high reactivity. , Additionally, its inherent long carbon chain structure contributes to a degree of cross-linking in polymer synthesis, thereby imparting a measure of water resistance to the resulting polymers. , For example, Shi et al. used different CO contents to synthesize a series of biobased WPUs.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Application of Silane-Modified Castor Oil-Based Waterborne Polyurethane as a Fluorine-Free and Durable Water Repellent

Guo,

Sun,

Chen

et al. 2024

ACS Appl. Polym. Mater.

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As petroleum resources diminish and public environmental consciousness increases, biobased, fluorine-free waterproof agents have become a research hotspot. However, most reported waterproof agents still suffer from poor water resistance and have the drawback of hardening the fabric's hand feel. To address these issues, silanated castor oil (SiCO) was synthesized by castor oil and trimethoxysilane and used to prepare a series of biobased waterborne polyurethanes (SiCO-WPU). Then, SiCO-WPU was finished on the polyamide fabric using a pad−dry−cure procedure. The finishing process was optimized by using the Minitab software. The water repellency tests showed that when the SiCO content was 19.92%, the water contact angle of the SiCO-WPU film increased from 74.8°to 95.8°, and the treated polyamide fabric achieved a contact angle of 138.5°along with a water repellency rating of level 4. In addition, the treated fabric exhibited an 11% decrease in the sliding friction coefficient and a 20% enhancement in the crease recovery angle. Even after 20 washes, the treated fabric still maintained good water repellency and improved the smooth and elastic hand feel. This work holds significant importance for the design and application of sustainable, fluorine-free waterproofing agents in the textile industry.

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Section: Introductionmentioning

confidence: 99%

Synthesis and Application of Silane-Modified Castor Oil-Based Waterborne Polyurethane as a Fluorine-Free and Durable Water Repellent

Guo,

Sun,

Chen

et al. 2024

ACS Appl. Polym. Mater.

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“…Moreover, the ionization of the carboxyl group of dihydroxymethylbutyric acid also formed a physical barrier between the isocyanate and water molecules, which led to the successful encapsulation of the isocyanate in the polyurethane core. In addition, research on encapsulating small molecules such as drugs using polyurethane as a carrier is gradually attracting interest from scientists 36–39 . The newly fabricated isophorone diisocyanate (IPDI) small molecule coated with amphiphilic polyurethane offers a new method and strategy for the development of polyurethane‐coated small molecules such as drugs.…”

Section: Introductionmentioning

confidence: 99%

Preparation of organosilicon and organofluorine synergistically modified amphiphilic branched polyurethanes and their application in diisocyanate emulsifiers

Li,

Yin,

Zhao

et al. 2024

J of Applied Polymer Sci

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Isocyanate‐based monomers and polymers have found widespread industrial application; however, the realization of green water‐based products via the preparation of stable isocyanate aqueous emulsions remains challenging. Herein, a series of organosilicon and organofluorine synergistically modified amphiphilic branched polyurethanes (HBWPU), synthesized by grafting perfluorohexyl ethanol semi‐terminated isophorone diisocyanate (IPDI) onto a hydrophilic polyurethane prepolymer, is presented. Subsequently, using a physical mixing method, stable diisocyanate emulsions are fabricated by preparing diisocyanate latex particles with IPDI as the core and hyperbranched water‐based polyurethanes (HBWPU) as the shell. Structural investigations showed that the branching degree and fluorine content of the HBWPU significantly affects the stability of the diisocyanate emulsions. Increasing the degree of branching from 0.34 to 0.86 causes the amount of residual isocyanate (NCO) groups to decrease from 20.1% to 16.7%. In contrast, an increase in the fluorine content from 0% to 17.8% increases the amount of residual NCO groups from 11.5% to 24.6%. Thus, HBWPU can be used as an emulsifier to prepare waterborne diisocyanate cross‐linking agents. Such polyurethane‐coated isocyanate aqueous emulsions can increase the hardness and significantly improve the acetone resistance of hydroxyl polyacrylate resins.

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Micro structure analysis of the coating of polyurethane coated urea during nitrogen release process

Wu,

Zhao,

Zeng

et al. 2024

Ferroelectrics

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Introduction of bio-based hard segment as an alternative strategy to environmentally friendly polyurethane coated urea

Cited by 3 publications

References 43 publications

Synthesis and Application of Silane-Modified Castor Oil-Based Waterborne Polyurethane as a Fluorine-Free and Durable Water Repellent

Synthesis and Application of Silane-Modified Castor Oil-Based Waterborne Polyurethane as a Fluorine-Free and Durable Water Repellent

Preparation of organosilicon and organofluorine synergistically modified amphiphilic branched polyurethanes and their application in diisocyanate emulsifiers

Micro structure analysis of the coating of polyurethane coated urea during nitrogen release process

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