Batch preparation and characterization of ZnO/PLGA/PCL nanofiber membranes for antibacterial materials

As biomaterials with excellent biocompatibility, biodegradation and low toxicity, poly(ε-caprolactone) (PCL) and poly(lactic-co-glycolic acid) (PLGA) are widely applied as wound dressing and surgical suture in biomedical field. In this paper, an oblique section free surface eletrospinning (OSFSE) apparatus was utilized to prepare high-quality and high-output ZnO/PLGA/PCL nanofiber membranes (NFMs) for antibacterial materials. The effects of the weight ratio of PLGA and PCL on the viscosity and conductivity of electrospinning solutions as well as the yield, morphology and wettability of PLGA/PCL NFMs were researched, and the optimal weight ratio of 6:4 was determined. Then the effects of ZnO contents on the electrospinning solution properties as well as the yield, morphology, structure, wettability, mechanical property and antibacterial performance of ZnO/PLGA/PCL NFMs with the optimal ratio of PLGA and PCL were studied. The results indicated that the addition of ZnO could improve significantly the antibacterial effect of NFMs, and the NFMs with 3 wt% ZnO had excellent antibacterial activity against E. coli (95.3%) and S. aureus (95.7%).

Progress in batch preparation of single-atom catalysts and application in sustainable synthesis of fine chemicals

In 2011, Zhang's research team, in cooperation with Li and Liu, reported the Pt1/FeOx atomically dispersed catalysts for the first time in the world, and based on this, proposed the...

A laser metallurgy route for the batch preparation of mm-scale 3D silver/graphite heteronanoclusters in air

We report a batch preparation of mm-scale 3D Ag hetero-nanoclusters which exhibit an excellent surface plasmon resonance ability via facile laser metallurgy.

Production of Foam Glass Materials from Silicate Raw Materials by Hydrate Mechanism

The ways of external protection of oil pipelines, their advantages and disadvantages were described. A method for protecting pipes using foam glass products, based on local raw materials, was proposed. The powder technology of the batch preparation and the hydration mechanism of foaming through the interaction of alkali and silica were chosen for this study, based on the existing methods of foaming of silicate raw materials. Compositions of the batch were developed, their foaming was carried out in the temperature range, corresponding to the pyro-plastic state, the effectiveness of the additional introduction of foaming substances was analyzed. The macro-and microstructure of the specimen, as well as their phase composition, were studied. The optimal composition and optimum foaming temperature for the production of foam glass materials were selected.