Air permeability is crucial to nanofibrous membrane applications, such as in wound dressing and membrane distillation. Herein, hierarchical structure membrane is prepared layer by layer with different fiber diameters, using electrospinning method. The results showed that with different layer arrangement results in different air permeability, and optimal condition is found.

In-situ atomic-scale phase transformation of Mg under hydrogen conditions. 2018

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Highlight  Ultrahigh pressure solid solution with aging is a way to enhance corrosion  Obvious age-hardening response is detected in Mg-Al binary system  An intrinsic Al-rich layer accounts for high anti-corrosion of Mg-Al alloys  Nanosized beta phase containing high-index planes offers high activity.

Corrosion issue is one of the most crucial bottlenecks for extensive employment of Mg alloys, in particular under harsh engineering conditions. Differing from traditional approaches, a self-healing protective coating composed of lactoglobulin is proposed herein to offer sustainable protection to the underlying Mg parts. Corrosion resistance, evaluated by electrochemical measurements and hydrogen evolution tests, indicates that the lactoglobulin composite film exhibits nobler corrosion potential (−1.28 V SCE ), smaller corrosion current density (8.4 × 10 −6 A/cm 2 ), and lower average corrosion rate (∼0.03 mm/ y) than those of its bare counterparts. Moreover, the pre-made cracks in the film were evidently self-healed within 24 h of exposure to corrosive media. The proposed self-healing lactoglobulin composite film provides opportunities to tackle the corrosion challenges of Mg alloys.

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