Enhanced Mechanical and Thermal Properties of Chain-Extended Waterborne Polyurethane Coatings with Cellulose Acetate Butyrate

Kwon, Yong-Rok; Kim, Hae-Chan; Kim, Jung-Soo; So, Ju‐Hee; Chang, Young‐Wook; Kim, Dong Hyun

doi:10.3390/polym14194062

Cited by 5 publications

(3 citation statements)

References 24 publications

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“…[31] The antisymmetric and symmetric stretching vibrations of methylene group peaks of NÀ mCABs and CABS were observed at around 2900 cm À 1 and 2800 cm À 1 , respectively. [32,33] After the surface modification of mCABs with APTES, the new peak observed at around 1550 cm À 1 was assigned to NÀ H bending vibrations. [34] The SEM images of NÀ mCABs and CABs were illustrated in Figure 2 and as depicted in Figure 2 (A and C) the surfaces of both beads were smooth; however, their inner parts were rough and the central of NÀ mCABs (D) were quite different as compared to CABs (B), probably, the addition of magnetic nanopowders could result in changing the central of NÀ mCABs.…”

Section: Resultsmentioning

confidence: 99%

DNA Adsorption Capabilities of Amine Functionalized Magnetic Cellulose Acetate Butyrate Beads from Aqueous Solution

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2024

ChemistrySelect

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In this work, the magnetic cellulose acetate butyrate beads (mCABs) were prepared and then, their surfaces were modified with [(3‐Aminopropyl) triethoxysilane)] (APTES) solution to generate amine groups (−NH2) as a ligand for DNA adsorption in the aqueous solution. After the surface modification, the −NH2 functionalized mCABs (N−mCABs) were characterized with Fourier Transform Infrared Spectroscopy (FTIR), scanning electron microscope (SEM), and energy dispersive X‐ray (EDX) analysis. The optimum pH value of DNA adsorption was observed at pH 4 and at this point, the N−mCABs adsorbed 4.27 mg/g DNA at room temperature (RT). The maximum adsorbed amount of DNA was calculated as 5.24 mg/g and the DNA adsorption was exothermic; furthermore, DNA adsorption was monolayer and the Langmuir adsorption model was more fitted than the Freunclich isotherm model due to the regression coefficient (R2), and the qmax values of the Langmuir model. According to reusability studies, the prepared adsorbent protected its stability and the adsorption capacity after the 5 consecutive adsorption, desorption, and regeneration cycles.

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Section: Resultsmentioning

confidence: 99%

DNA Adsorption Capabilities of Amine Functionalized Magnetic Cellulose Acetate Butyrate Beads from Aqueous Solution

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2024

ChemistrySelect

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“…It was because the POSS cross-linking agent was the vital parameter to increase the link density in the waterborne polyurethane system. Thus, the interaction for molecules strengthen could lead to significant improvement of the mechanical properties for the composite materials [28,38]. When the content of POSS increased, the rigidity of the molecular chain could enhance, and the mobility of the molecular chain would reduce, resulting in the decrease in mechanical properties.…”

Section: Water Contact Angle (Wca) and Mechanical Properties Of The D...mentioning

confidence: 99%

Study of a Novel Fluorine-Containing Polyether Waterborne Polyurethane with POSS as a Cross-Linking Agent

Deng

Zhang

et al. 2023

Polymers

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Waterborne polyurethane are more eco-friendly materials due to lower volatile organic compounds (VOCs, mainly isocyanates) content than the alternative materials. However, these rich hydrophilic groups polymers have not yet reached good mechanical properties, durability and hydrophobicity behaviors. Therefore, hydrophobic waterborne polyurethane has become a research hotspot, attracting significant attention. In this work, firstly, a novel fluorine-containing polyether P(FPO/THF) was synthesized by cationic ring-opening polymerization of 2-(2,2,3,3-tetrafluoro-propoxymethyl)-oxirane (FPO) and tetrahydrofuran (THF). Secondly, fluorinated polymer P(FPO/THF), isophorone diisocyanate (IPDI) and hydroxy-terminated polyhedral oligomeric silsesquioxane (POSS-(OH)8) were used to prepare a new fluorinated waterborne polyurethane (FWPU). Hydroxy-terminated POSS-(OH)8 was used as a cross-linking agent, while dimethylolpropionic acid (DMPA) and triethylamine (TEA) were used as a catalyst. Four kinds of waterborne polyurethanes (FWPU0, FWPU1, FWPU3, FWPU5) were obtained by adding different contents of POSS-(OH)8 (0%, 1%, 3%, 5%). The structures of the monomers and polymers were verified by 1H NMR and FT-IR, and the thermal stabilities of various waterborne polyurethanes were analyzed by thermogravimetric analyzer (TGA) and differential scanning calorimetry (DSC). As the results, the thermal analysis showed that the FWPU performed the good thermal stability and the glass transition temperature could reach at about −50 °C. The FWPU1 film exhibited that the elongation at break was 594.4 ± 3.6% and the tensile strength at break was 13.4 ± 0.7 MPa, elucidating that the FWPU1 film developed the excellent mechanical properties relative to the alternative FWPUs. Further, the FWPU5 film performed the promising properties, including the higher surface roughness of FWPU5 film (8.41 nm) obtained by the atomic force microscope (AFM) analysis, and the higher value of water contact angle (WCA) at 104.3 ± 2.7°. Those results illustrated that the novel POSS-based waterborne polyurethane FWPU containing a fluorine element could develop the excellent hydrophobicity and mechanical properties.

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“…Synthesis of eco-friendly waterborne polyurethanes (WPU) is one of most intensively developed fields of polymer chemistry [ 1 , 2 , 3 , 4 , 5 ]. WPU are amphiphilic polymers, the hydrophilic parts of which are considered to be urethane fragments bound with ionic centers, and hydrophobic parts are urethane fragments of oligo ethers and low-molecular-weight diols/diamines.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Study of Properties of Waterborne Polyurethanes Based on β-Cyclodextrin Partial Nitrate as Potential Systems for Delivery of Bioactive Compounds

et al. 2022

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Eco-friendly waterborne polyurethanes (WPU) find wide application in agriculture as pesticide carriers, which enhances their efficiency. To provide better control of the retention time and capacity of pesticides, WPU can be modified by cyclodextrin derivatives able to form supramolecular assemblies with bioactive substances. Synthesis of WPU containing up to 15 wt.% of covalently bound β-cyclodextrin partial nitrate (CDPN) is reported in this work. Covalent bonding of CDPN to a polyurethane matrix has been proved by IR spectroscopy and size exclusion chromatography. The particle size and viscosity of the WPU dispersion have been determined. The introduction of CDPN affects molecular weight and thermal properties of WPU films. The presence of CDPN in WPU is shown to provide higher average molecular weight, wider molecular weight distribution, and larger average size of dispersed particles, compared with WPU reference samples containing 1,4-butanediol. The analysis of the rheological behavior of the obtained WPU dispersions shows that they can be classified as pseudoplastic liquids. The analysis of the thermal parameters of WPU films indicates that the introduction of 15.0 wt.% CDPN shifts the value of the glass transition temperature from −63 °C to −48 °C compared with reference samples. We believe that the results of the present study are sufficiently encouraging in terms of using CDPN-modified eco-friendly WPU as potential systems for developing the delivering agents of bioactive compounds. The application of such systems will allow the long-term contact of pesticides with the plant surface and minimize the possibility of their release into the environment.

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Enhanced Mechanical and Thermal Properties of Chain-Extended Waterborne Polyurethane Coatings with Cellulose Acetate Butyrate

Cited by 5 publications

References 24 publications

DNA Adsorption Capabilities of Amine Functionalized Magnetic Cellulose Acetate Butyrate Beads from Aqueous Solution

DNA Adsorption Capabilities of Amine Functionalized Magnetic Cellulose Acetate Butyrate Beads from Aqueous Solution

Study of a Novel Fluorine-Containing Polyether Waterborne Polyurethane with POSS as a Cross-Linking Agent

Synthesis and Study of Properties of Waterborne Polyurethanes Based on β-Cyclodextrin Partial Nitrate as Potential Systems for Delivery of Bioactive Compounds

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