Results 171 to 180 of about 26,901 (226)

Model-free cure kinetics of tetra-functional epoxy reinforced with GO and p-Phenylenediamine modified GO

, 2021
Tetra-functional epoxy was reinforced with graphene oxide (GO) and p-Phenylenediamine functionalized graphene oxide (fGO). FTIR and XPS analysis of fGO confirmed the attachment of amine groups on its surface. Data obtained from nonisothermal DSC scans of
Radhika Wazalwar, A. Raichur
semanticscholar   +1 more source

Enhancement of the catalytic activity of Pd nanoparticles in Suzuki coupling by partial functionalization of the reduced graphene oxide support with p-phenylenediamine and benzidine

Journal of Catalysis, 2020
This paper reports the development of novel supports for highly active Pd nanoparticles for room temperature Suzuki cross coupling reactions. The partial functionalization of the reduced graphene oxide support by the N-containing p-phenylenediamine and ...
Amr Awad Ibrahim, A. Lin, Mina Shawky Adly, M. El-Shall   +3 more
semanticscholar   +1 more source

Sensitive and visual detection of p-phenylenediamine by using dialdehyde cellulose membrane as a solid matrix.

Analytica Chimica Acta, 2020
A novel method was developed for the sensitive and visual detection of p-phenylenediamine (PPD) via immobilizing the target specie PPD on dialdehyde cellulose membrane (DCM) followed by the reaction with salicylaldehyde.
Shengli Zhang, Bofang Liu, Daiyan Hu, Silue Zhang, Yanbo Pei, Zhengjun Gong   +5 more
semanticscholar   +1 more source

Poly(p-phenylenediamine)/maghemite composite as highly effective adsorbent for anionic dye removal

, 2020
Poly(p-phenylenediamine)/maghemite (PPDA/γ-Fe2O3) composites were prepared by the oxidative polymerization of p-phenylenediamine with ammonium peroxodisulfate as an oxidizing agent in the presence of γ-Fe2O3 nanoparticles.
Islam M. Minisy, B. Zasońska, E. Petrovský, P. Veverka, I. Šeděnková, J. Hromádková, P. Bober   +6 more
semanticscholar   +1 more source

Ultrastable tetraphenyl-p-phenylenediamine-based covalent organic frameworks as platforms for high-performance electrochemical supercapacitors.

Chemical Communications, 2019
In this study we synthesized two tetraphenyl-p-phenylenediamine-based covalent organic frameworks (TPPDA-TPPyr and TPPDA-TPTPE COFs) for potential use in high-performance electrochemical supercapacitors.
A. EL-Mahdy, M. Mohamed, T. H. Mansoure, Hsiao-hua Yu, Tao Chen, S. Kuo   +5 more
semanticscholar   +1 more source

Accurate and stable detection of p-phenylenediamine antioxidants and their transformation products in aquatic products using antioxidant protection - Analysis of actual aquatic products.

Journal of Hazardous Materials
Given the high toxicity of N-(1,3-dimethylbutyl)-N'-phenyl-p-phenylenediamine (6PPD) derivatives, such as 6PPD quinone (6PPDQ) to salmon, as well as their ubiquitous presence in the environment, the contaminant of aquatic food products has drawn ...
Qicai Zhang, Xianli Wang, Chengbin Liu, Huaxi Li, Zhongsheng Deng, Chunxia Yao, Yameng Li, Q. Rao, Weiguo Song   +8 more
semanticscholar   +1 more source

Comparative DFT study of the effectiveness of p-phenylenediamine antioxidants through their coordination ability towards the late 1st row transition metals

, 2020
Interaction energies, metal atom charges and electron density Laplacians at bond critical points of metal – nitrogen bonds in [Aox…M]2+ complexes of a series of p-phenylenediamine antioxidants (Aox) with the late 1st row transition metals M(II) in ...
Ingrid Jelemenska, M. Breza
semanticscholar   +1 more source

Conducting polymers X: Dielectric constant, conduction mechanism and correlation between theoretical parameters and electrical conductivity of poly (N,N′-bis-sulphinyl p-phenylenediamine-2,6-diaminipyridine) and poly (N,N′-bis-sulphinyl p-phenylenediamine-3,5-diamine-1,2,4-trizole)

European Polymer Journal, 2019
Poly (N,N′-bis-sulphinyl p-phenylenediamine-2,6-diaminipyridine) (PBSPDP) and poly (N,N′-bis-sulphinyl p-phenylenediamine-3,5-diamine-1,2,4-trizole) (PBSPDT) were synthesized by Micheal addition polymerization method using thionyl chloride and ...
M. Diab, A. El-Sonbati, N. El-Ghamaz, Sh.M. Morgan, O. El-shahat   +4 more
semanticscholar   +1 more source

Evaluation of in vitro testing strategies for hazard assessment of the skin sensitization potential of “real‐life” mixtures: The case of henna‐based hair‐colouring products containing p‐phenylenediamine

Contact Dermatitis, 2019
Allergic contact dermatitis caused by henna‐based hair‐colouring products has been associated with adulteration of henna with p‐phenylenediamine (PPD).
R. I. de Ávila, Danillo F M C Veloso, G. C. Teixeira, T. Rodrigues, T. Lindberg, M. Lindstedt, S. G. Fonseca, E. Lima, M. Valadares   +8 more
semanticscholar   +1 more source

Solvothermal synthesis of EDTA-functionalized magnetite-carboxylated graphene oxide nanocomposite as a potential magnetic solid phase extractor of p-phenylenediamine from environmental samples

Journal of Dispersion Science and Technology, 2019
The use of carboxylated graphene oxide (CGO) in the removal of organic pollutants from aquatic life is a recent and significant issue. In this study, EDTA-functionalized magnetite-carboxylated graphene oxide nanocomposite (EDTA-MCGO) was first used for ...
Amr A. Yakout, H. M. Albishri
semanticscholar   +1 more source