We synthesized graphene oxide (GO) using a modified Hummer’s method, and then blended it into polyvinyl chloride (PVC) and amino-functional PVC (PVC-4ABA) matrices. GO was added to 0.5 g PVC at 0.01, 0.05, 0.1 and 0.5 g. The PVC/GO matrix was modified using 4-aminobenzoic acid (4ABA) at 0.01, 0.05, 0.1 and 0.5 g per 0.5 g PVC. This gave four amino-functional PVC/GO series and one PVC/GO series nanocomposite membranes that were prepared by a solution blending route. The filler and the modifier (4ABA) content effect on the PVC membrane properties were investigated. Fourier transform infrared spectroscopy confirmed the GO functional groups and PVC modification with 4ABA. According to scanning electron microscopy, a unique two-way layered structure was observed for modified PVC and GO composites. XRD explained the conformation of PVC/GO and modified PVC/GO nanocomposites. GO crystallite size and its interlayer distance between sheets were also studied. The XRD peak at 2θ = 10.8° with interlayer spacing of 0.8...

An investigation on 4-aminobenzoic acid modified polyvinyl chloride/graphene oxide and PVC/graphene oxide based nanocomposite membranes:

In this effort, series of polyvinyl chloride (PVC) and 4-aminobenzoic acid (4ABA)-modified PVC and functional graphite (FG)-based membranes were prepared. Fourier transform infrared spectroscopy and X-ray diffraction analysis were used to confirm PVC and graphite modification and nanocomposite formation. Scanning electron microscopy depicted homogenously layered morphology of modified PVC nanocomposite. Glass-transition temperature (Tg) of non-modified PVC nanocomposite was 243°C, whereas modified nanocomposite with similar FG loading had Tg of 258°C. Higher filler content furnished better hydrophilic membranes. Efficiency of PVC–4ABA-0.5/FG 0.5 membrane was 100% for removal of Hg2+ and Pb2+. PVC–4ABA-0.5/FG 0.5 membrane with smaller contact angle (30°) is a fine option for water purification.

Structure and properties of 4-aminobenzoic acid-modified polyvinyl chloride and functionalized graphite-based membranes

Preparation of {200} crystal faced SnO2 nanorods with extremely high gas sensitivity at lower temperature

A series of silica supported Pd (Pd/SiO2) catalysts were prepared in various HCl concentrations (CHCl) of the impregnation solution with different electrostatic interactions between Pd precursor and support, and their catalytic properties were evaluated by the selective hydrogenation of nitrile butadiene rubber (NBR). The results show that with the CHCl increasing from 0.1 to 5 M, the particle size of Pd nanoparticles dramatically decreases from 24.2 to 5.1 nm and stabilizes at ∼5 nm when CHCl is higher than 2 M. Using the catalysts prepared with a high CHCl (>2 M), an excellent hydrogenation degree (HD) of ∼94% with 100% selectivity to C═C can be acquired under mild conditions. Interestingly, the HD could be remarkably increased from 65 to 92% by increasing only CCl– from 0.1 to 2 M with the addition of NaCl while keeping CH+ at 0.1 M. This is because PdCl42– is the predominant existing form of precursor at high CCl–, which has a strong electrostatic attraction with the positively charged support favorab...

Synthesis of Pd/SiO2 Catalysts in Various HCl Concentrations for Selective NBR Hydrogenation: Effects of H+ and Cl– Concentrations and Electrostatic Interactions

Mechanistic revelation into the degradation of organic pollutants by calcium peroxide nanoparticles@polydopamine in Fe(III)-based catalytic systems

A new type of self-cross-linking hydrogenated carboxylated nitrile-butadiene rubber (HXNBR)/polyvinyl chloride (PVC) composite film was prepared from their mixed emulsions. HXNBR latex was obtained by diimide hydrogenation. The HXNBR/PVC composite film can be self-cross-linked without any additional cross-linking agent. The properties of composite films, including film-forming property, morphology, physical properties, swelling behavior, and ageing properties were investigated. When PVC content was lower than 30%, the composite film showed no crack in the surface, especially at 20% of PVC content, the composite film showed excellent mechanical properties. The addition of 20% PVC improved thermal stability of HXNBR film.

Self-Cross-Linking Hydrogenated Nitrile-Butadiene Rubber Latex/Polyvinyl Chloride Emulsion Composite Film and Its Properties

Polyvinyl pyrrolidone grafted silica reinforced hydrogenated carboxylated nitrile latex film with improved mechanical properties

The invention belongs to the technical field of high molecular material synthesis and modification and relates to a preparation method of amphiphilic nitrile rubber with fluorescence thermosensitivity. The invention is characterized in that an amphiphilic nitrile rubber functional polymer with fluorescence thermosensitivity is prepared by introducing poly N-isopropyl acrylamide with fluorescence thermosensitivity to a nitrile rubber main-chain. The preparation method comprises the following specific operations: firstly, carboxyl-terminated poly N-isopropyl acrylamide is synthesized by a free radical method; then, the synthesized carboxyl-terminated poly N-isopropyl acrylamide and hydroxyl-terminated nitrile rubber are dissolved in dichloromethane, and a reaction is performed for 20-28 hours with N-dicyclohexylcarbodiimide as an activator; and finally, a specific separation method is utilized for processing so as to obtain the amphiphilic nitrile rubber functional polymer with fluorescence thermosensitivity. The effect and advantage of the invention is that an amphiphilic nitrile rubber functional polymer with fluorescence thermosensitivity is prepared and the field of functional rubber with fluorescence thermosensitivity is broadened.

Preparation method of amphiphilic nitrile rubber with fluorescence thermosensitivity

A recyclable heterogeneous rhodium catalyst (MTS-T-Rh) was prepared by loading Rh species onto an amino-silica support grafted by tannin, an intermediate linker and stabilizer, and fully c...

Highly active and reusable rhodium catalyst for selective hydrogenation of nitrile–butadiene rubber

Non-vulcanized glue film of hydrogenated butyronitrile-polyvinyl chloride blended emulsion and preparation and application thereof

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