Preparation castor oil-modified high bio-based waterborne polyurethane and its application

Shi, Mengqing; Yang, Jin; Wang, Xiwen

doi:10.1007/s10965-021-02719-3

Cited by 18 publications

(10 citation statements)

References 32 publications

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“…The loss modulus ( E ″) versus test temperature curves of pure WPU and each component β‐CD/PEG/WPU composites are plotted in Figure 4f. It can be seen that the highest loss modulus of each component β‐CD/PEG/WPU sample is higher than that of pure WPU, which is due to the cross‐linked network structure and hydrogen bonding between the added β‐CD/PEG and the WPU matrix, which improves the compatibility and structural stability of the two materials 37 …”

Section: Resultsmentioning

confidence: 99%

“…It can be seen that the highest loss modulus of each component β-CD/PEG/ WPU sample is higher than that of pure WPU, which is due to the cross-linked network structure and hydrogen bonding between the added β-CD/PEG and the WPU matrix, which improves the compatibility and structural stability of the two materials. 37 Figure 4g reflected the variation of loss factor with temperature. The position of the tanδ peak of pure waterborne polyurethane is À60 C, respectively, while the position of β-CD/PEG/WPU tanδ peaks were at À47.1 C, À38.4 C, and À36.8 C, respectively, and the glass transition temperature increased sequentially, indicating that the β-CD/PEG composites would be present in the soft segment of WPU and would impede the movement of molecular chains in the soft segment phase.…”

Section: Dynamic Mechanical Property Analysismentioning

confidence: 99%

“…Figure4e-g shows the DMA curves of pure WPU, each component β-CD/PEG/WPU, including the storage modulus, loss modulus and loss factor with temperature.From Figure4e, it could be seen that the E 0 of all the WPU films with β-CD/PEG addition is higher than that of pure WPU, and the energy storage modulus is β-CD/ PEG1000/WPU > β-CD/PEG2000/WPU > β-CD/ PEG4000/WPU > β-CD/WPU > WPU, indicating that the addition of β-CD/PEG composites improves the elasticity of the material, which also explains the improvement of the mechanical properties of the WPU blended film with lower molecular weight of β-CD/PEG composites.The loss modulus (E 00 ) versus test temperature curves of pure WPU and each component β-CD/PEG/WPU composites are plotted in Figure4f. It can be seen that the highest loss modulus of each component β-CD/PEG/ WPU sample is higher than that of pure WPU, which is due to the cross-linked network structure and hydrogen bonding between the added β-CD/PEG and the WPU matrix, which improves the compatibility and structural stability of the two materials 37. Figure4greflected the variation of loss factor with temperature.…”

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confidence: 91%

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Dual network interpenetrating degradable waterborne polyurethanes with hydrogen bonded cross‐linked modified β‐cyclodextrin hydrophobic cavities

Fan

Song

Liu

et al. 2023

J of Applied Polymer Sci

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The study gives an investigation on the properties of β‐cyclodextrin (β‐CD) waterborne polyurethane (WPU) composites with cross‐linked network structure and hydrogen bonding system. The polyurethane films modified with β‐CD/PEG exhibit superior thermal stability and biodegradability, it is capable to be applied to bio‐degradable plastic coatings. To improve the distribution of β‐CD in WPU, the β‐CD was modified by three different molecular weights of polyethylene glycol hydrophile (PEG). Since the chain segments and hydrophilic hydroxyl groups of PEG interact with the hydrophobic cavities and edges of β‐CD to form new complexes, thus enhancing the flexibility and structural integrity of WPU chains and conferring better biological properties. The analysis focuses on the changes of thermal stability and biodegradability after modification. The results indicated that the temperature of maximum thermal weight loss rate (Tmax) of β‐CD/PEG/WPU composites reached 394.1°C and the soft segment glass transition temperature (Tg) was −42.4°C after the introduction of β‐CD/PEG. Both are significantly improved compared to WPU, with degradation rates of 31.2% in lipase PBS solution and 14.8% in soil, and can therefore be better applied to current medical devices and biodegradable coatings, as well as other bio‐environmental areas.

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Section: Resultsmentioning

confidence: 99%

Section: Dynamic Mechanical Property Analysismentioning

confidence: 99%

mentioning

confidence: 91%

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Dual network interpenetrating degradable waterborne polyurethanes with hydrogen bonded cross‐linked modified β‐cyclodextrin hydrophobic cavities

Fan

Song

Liu

et al. 2023

J of Applied Polymer Sci

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“…This type of corn, a nonfood feed and industrial crop, is abundant and does not directly compete with food production. This biotechnology offers a relatively environmentally friendly and sustainable production method for PDI, the toxic chemicals that may be involved in the P-PU production process are eliminated, reducing reliance on petrochemical resources. , PDI produced from biomass is characterized by a high green carbon content and low CO 2 emissions . Its structure and chemical properties are similar to those of hexamethylene diisocyanate, which enriches the polyurethane products.…”

Section: Introductionmentioning

confidence: 99%

Isobaric Vapor–Liquid Equilibrium for Binary Mixtures Composed of Pentamethylene Diisocyanate, 5-Chloropentyl Isocyanate, and Chlorobenzene at 10 kPa

Liu,

Kong,

et al. 2024

J. Chem. Eng. Data

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Isobaric vapor−liquid equilibrium (VLE) data were collected for three binary mixtures: pentamethylene diisocyanate and 5-chloropentyl isocyanate, pentamethylene diisocyanate and chlorobenzene, and 5-chloropentyl isocyanate and chlorobenzene. These measurements were conducted using a modified Rose-type recirculating still, within a temperature range of 336.15−435.15 K and at 10 kPa. The uncertainty of temperature and pressure was divided into 0.6 K and 0.1 kPa. No azeotropic behavior was observed during the experiments. The experimental results were regressed using the maximum likelihood function and were correlated with three activity coefficient models: NRTL, Wilson, and UNIQUAC, from which the corresponding binary interaction parameters were estimated. Data of all binary systems passed thermodynamic consistency tests, including the Herington area test and the Van Ness point method. The root-mean-square deviations of the vapor phase mole fraction and equilibrium temperature were less than 0.0107 and 0.82 K, which demonstrated that the experimental data were well correlated with all three models.

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“…As the CO content increased from 0 to 8.97%, the hydrophobicity of the film was significantly improved with a maximum contact angle of 89.5°and a water absorption rate of 7.60%. 41 He et al employed CO as a biobased polyol to prepare a series of WPU dispersions and carried out the thiol− ene photo click reaction for silane modification on WPU films. 42 The modified WPU films exhibited high water resistance, with a water absorption rate of 1.94% and a contact angle of up to 99.3°.…”

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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Preparation castor oil-modified high bio-based waterborne polyurethane and its application

Cited by 18 publications

References 32 publications

Dual network interpenetrating degradable waterborne polyurethanes with hydrogen bonded cross‐linked modified β‐cyclodextrin hydrophobic cavities

Dual network interpenetrating degradable waterborne polyurethanes with hydrogen bonded cross‐linked modified β‐cyclodextrin hydrophobic cavities

Isobaric Vapor–Liquid Equilibrium for Binary Mixtures Composed of Pentamethylene Diisocyanate, 5-Chloropentyl Isocyanate, and Chlorobenzene at 10 kPa

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

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