Synthesis and properties of octadecylamine-graphene oxide modified highly hydrophobic waterborne polyurethane emulsion

J of Applied Polymer Sci

Mao

et al. 2021

Self Cite

Herein, tannic acid‐terephthalyl chloride (TA‐TPC) was prepared and was applied for the preparation of TA‐TPC‐Rubber to composite styrene butadiene styrene (SBS)‐modified asphalt (SBSMA). Fourier transform infrared spectroscopy and scanning electron microscopy indicated that TA‐TPC successfully attached to the surface of rubber powder (RP), which improved the bonding between RP and SBSMA. Fluorescence microscopy analysis showed that TA‐TPC‐Rubber formed a complete crosslinking network structure in SBSMA, while thermogravimetry analysis proved the higher thermal stability of TA‐TPC‐Rubber/SBSMA. Dynamic shear rheometer and multi‐stress creep recovery tests confirmed that compared with SBSMA, the storage modulus (G') and loss modulus (G") of 12% TA‐TPC‐Rubber/SBSMA at 46°C were increased by 37.14% and 34.36%, respectively, the recovery rate was increased by 35.49% (0.1 kPa) and 31.91% (3.2 kPa) while the average creep compliance was decreased by 68.67% (0.1 kPa) and 59.87% (3.2 kPa). The phase segregation test proved that the compatibility between RP and SBSMA was improved by the modification of TA‐TPC, and the difference between the upper and lower softening points were reduced by 53.85%. The findings of this study can be of great significance for designing modified asphalt from cost‐effective raw materials through a convenient process for highways and construction applications.

Section: Resultsmentioning

confidence: 97%

“…The fluorescent part in Figure 12 represents SBS and RP 42,47 . The agglomeration of SBS can be clearly seen in Figure 12a due to its larger particle size 48 .…”

Section: Resultsmentioning

confidence: 99%

Synthesis of tannic acid‐terephthalyl chloride modified rubber powder for the fabrication of tannic acid‐terephthalyl chloride‐rubber/styrene‐butadiene‐styrene modified asphalt

Wang

J of Applied Polymer Sci

Mao

et al. 2021

Self Cite

“…Functional group and chemical compositional characterizations of the KPG composite were achieved via FTIR in the scanning range 4000–400 cm −1 using the KBr disc method . XRD was employed to investigate the crystal structure of samples at room temperature in the 2 θ range 5°–60°, 40 kV, 200 mA, with a scanning step of 0.02° min −1 .…”

Section: Methodsmentioning

confidence: 99%

Preparation and properties of modified graphene oxide incorporated waterborne polyurethane acrylate

Yin

et al. 2019

Polymer International

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In this study, a new modifier (KPG) was prepared by modifying graphene oxide with -glycidoxypropyl trimethoxysilane (KH560) and polydimethylsiloxane (PDMS). KPG was in turn added to aqueous urethane acrylate for the fabrication of waterborne polyurethane polyacrylate emulsion modified with KH560-PDMS composite (KPG/WPUA). Textural characterizations of the KPG/WPUA coating were achieved via Fourier transform infrared, SEM, TGA and AFM techniques, which revealed that the KPG/WPUA film possessed a smooth surface. The synthesized KPG/WPUA films were tested for mechanical properties, hydrophobicity and acid/water corrosion performance which suggested their highly hydrophobic surface. KPG/WPUA with 0.1% KPG showed a contact angle of 118.35 ∘ , 30.35 ∘ higher than that of pristine WPUA. The KPG/WPUA film exhibited higher thermal stability, i.e. a 5% weight loss temperature of 305 ∘ C, which was 30 ∘ C higher than that of pristine WPUA film. The Young's modulus and elongation at break of the KPG/WPUA film were 34.1 MPa and 74.88% respectively, which were higher than that of WPUA film. Furthermore, KPG/WPUA films exhibited greater resistance (without obvious blistering and the white spotting phenomenon) to H 2 O 2 , HCl and water corrosion than pristine WPUA. The superior performance of KPG/WPUA films was attributed to the network chain structure formed upon the introduction of KPG into WPUA. The outstanding performance of KPG/WPUA films in terms of mechanical properties, thermal stability and high resistance to acidic and water corrosion makes them interesting alternative contenders for target applications.

“…Graphene is a thin nanomaterial with a high strength, large specific surface area, excellent mechanical properties, and heat resistance . Because of these intriguing properties and unique two‐dimensional structure, graphene has become a hot spot for researchers in many fields, including in PU industry . Sravendra Rana et al .…”

Section: Introductionmentioning

confidence: 99%

Synthesis and properties of polydimethylsiloxane/graphene oxide modified, water‐based polyurethane/polyacrylate

Yang

J of Applied Polymer Sci

et al. 2019

Self Cite

In this study, we prepared polydimethylsiloxane-graphene oxide (PG) modified waterborne polyurethane acrylate (WPUA) films and enhanced their hydrophobicity, thermal stability, and mechanical properties. The prepared films were characterized by Fourier transform infrared and energy spectroscopy analysis; this confirmed the successful incorporation of PG into WPUA. As shown by scanning electron microscopy and atomic force microscopy analysis, the surfaces of the WPUA films were confirmed to have turned smoother and more compact after PG addition. With an optimized amount of PG (0.1%) incorporated into the WPUA film, it exhibited a contact angle improvement of 21.9 , an enhanced decomposition temperature at 5% weight losses of 25 C, and an elongation at break improvement of 482.92% over those of pure WPUA. The newly synthesized PG-WPUA showed considerable enhancements in its hydrophobicity and thermal and mechanical properties and could be deemed to have potential value as an alternative contender for practical applications in coatings painted on tunnels and highways.