Facile Fabrication of Dual Functional Graphene Oxide Microcapsules Carrying Corrosion Inhibitor and Encapsulating Self-Healing Agent

Dual functional graphene oxide (GO) microcapsules were fabricated through self-assembly in Pickering emulsions, carrying corrosion inhibitor benzotriazole (BTA) on the microcapsule shells and encapsulating a self-healing agent epoxy monomer. The formation of the GO microcapsules was assisted by the interaction between BTA and GO, which provided robust encapsulation for the epoxy monomer. The loading capacity of BTA and epoxy monomer reached 90.5%. The addition of the GO microcapsules simultaneously promoted the corrosion protection and self-healing properties of the waterborne epoxy composite coatings. The healing efficiency of the composite coatings reached over 99.7% when the content of the microcapsules was 10 wt%. Meanwhile, the corrosion current density of the intact coatings was decreased for around 50 times

2,2′,4,4′-Tetrabromodiphenyl Ether (BDE-47) at Environmental Levels Influenced Photosynthesis in the Mangrove Species <i>Kandelia obovata</i>

2,2′,4,4′-tetra-bromodiphenytol ether (BDE-47) is one of the ubiquitous organic pollutants in mangrove sediments. To reveal the toxic effects of BDE-47 on mangrove plants, the mangrove species Kandelia obovate was used to investigate the photosynthetic capacity effects and the molecular mechanisms involved after BDE-47 exposure at environment-related levels (50, 500, and 5000 ng g−1 dw). After a 60-day exposure, the photosynthetic capacity was inhibited in K. obovata seedlings, and a decrease in the stomatal density and damage in the chloroplast ultrastructure in the leaves were found. Transcriptome sequencing showed that, following exposure to BDE-47, gene expression in photosynthesis-related pathways was predominantly suppressed in the leaves. The bioinformatics analysis indicated that BDE-47 exerts toxicity by inhibiting photosystem I activity and chlorophyll a/b-binding protein-related genes in the leaves of K. obovata. Thus, this study provides preliminary theoretical evidence for the toxic mechanism effect of BDE-47 on photosynthesis in mangrove species

Self-assembled graphene oxide microcapsules in Pickering emulsions for self-healing waterborne polyurethane coatings

A self-assembly process was employed to prepare the graphene oxide microcapsules (GOMCs), containing linseed oil as the healing agent. The nanometer-thick shells of GOMCs were built by the liquid crystalline assembling of graphene oxide (GO) sheets, forming at liquid liquid interface in Pickering emulsions. The GOMCs were embedded into waterborne polyurethane matrix, enabling the facile fabrication of self-healing composite coatings on hot-dip galvanized steel surfaces. The inclusion of GOMCs in the composite coatings not only imparted self-healing properties to the coatings, but also improved their anticorrosion properties because of the physical barrier of the GO shell, leading to much better survival to the weather/marine environment and surface wear. (C) 2017 Elsevier Ltd. All rights reserved

Gelcasting of alumina ceramics using an egg white protein binder system

Egg white protein (EW) is a food ingredient commonly used for its gelling properties and has been applied in ceramic fabrication. In this work, EW was used as an environmentally-friendly binder for gelcasting alumina ceramics at elevated temperature (80°C). The gelling behavior was compared with the ambient temperature drying-induced gelation processing. The processing conditions and mechanical properties of the ceramics processed from two different processing variants were compared. The results indicate that the ceramics from heat-induced gelation showed improved mechanical properties and more uniform microstructure after sintering in comparison to the drying-induced ones. Dense and complex-shaped ceramic parts via computer numerical controlled (CNC) green machining have been produced from the EW gelcast ceramics

Amino acid modified xanthone derivatives: Novel, highly promising membrane-active antimicrobials for multidrug-resistant gram-positive bacterial infections

10.1021/jm501285xJournal of Medicinal Chemistry582739-75

Rapid bactericidal action of alpha-mangostin against MRSA as an outcome of membrane targeting

10.1016/j.bbamem.2012.09.004Biochimica et Biophysica Acta - Biomembranes18282834-844BBBM