Preparation and properties of modified graphene oxide incorporated waterborne polyurethane acrylate

Abstract

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.

Preparation of hyperbranch‐structured polyester fiber via thiol‐ene click reaction under UV light irradiation for asphalt binder modification

“…FTIR, XPS, SEM, and EDS analyses were carried out to study the chemical structure, elemental composition, and physical appearance of the fibers, respectively. 23,24 The shear resistance of the modified asphalts was evaluated by penetration test. 25 All the mechanical properties tests were performed in accordance with JTG E20-2011.…”

Study on preparation and anticorrosive performance of a new high hydrophobic anticorrosive coating

“…During the combination of PDMS and EP, PDMS underwent a hydrolysis reaction to form silanol reactive groups (SiOH), which can easily open the ring with the reactive functional groups in the EP. The reaction created a stable high‐density cross‐linked mesh structure on the substrate surface, forming a stable anticorrosive precursor 39–41 . The PTFE/PDMS/EP coatings offered the most efficient protection of bare steel.…”

“…The reaction created a stable high-density cross-linked mesh structure on the substrate surface, forming a stable anticorrosive precursor. [39][40][41] The PTFE/PDMS/EP coatings offered the most efficient protection of bare steel.…”

Mechanical and tribological properties of nanocomposites incorporated with two-dimensional materials

“…There are two main strategies for further enhancing the mechanical properties of polymer composites. First, the functionalization, using octa (aminophenyl) silsesquioxane, octadecylamine, fluoride, etc., is an efficient way [129][130][131][132][133][134][135], because both dispersion and stress transfer can significantly improve the strength. The functionalization of 2D nanomaterials is conducive to better dispersion [136].…”

“…Interface bonding can be controlled by modification [2,130] and ball milling [93]. As the interface bonding is improved, the final Y of the composite becomes almost three times higher than that of the pure matrix [2].…”