Research Article
Biomaterials & Biodevices
Suresh Babu A; Rajiv G; Ananda Kumar S
Abstract
Although synthetic polymers offer excellent versatility in coating applications, due tointrinsic permeability to gases and vapours, including, but not limited to, oxygen, carbondioxide, and organic vapours, their application is highly limiting. On the other hand, somenatural polymers render great alternative ...
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Although synthetic polymers offer excellent versatility in coating applications, due tointrinsic permeability to gases and vapours, including, but not limited to, oxygen, carbondioxide, and organic vapours, their application is highly limiting. On the other hand, somenatural polymers render great alternative to synthetic polymers in such areas of research. Inthis work, flexible polyurethane is used to make the PLA as flexible coating. Hence, ourpresent study is focussed on the development of PLA-PU hybrid organic polymer with theincorporation of garnet waste powder (in-organic) as coatings deposited by brush-coatingmethod on mild steel. To overcome the brittle nature of the PLA, a small amount ofpolyurethane having a rubbery nature is added along with garnet. The mechanical and barrierproperties significantly improved with the addition of a garnet (5%, 10%, and 15%) inPLA-PU blends. The various characterization techniques like Fourier Transform InfraredSpectroscopy (FTIR), Crosshatch test, contact angle, and morphological analysis by ScanningElectron Microscopy (SEM) and Electrochemical Impedance and Salt-spray and Cross-hatchadhesion tests are checked.
Research Article
Biosensors, Bioelectronics and Biodevices
Jiegang Peng
Abstract
Inspired by the research on the active electrolocation organs of weakly electric fish in bionic engineering field, we proposed a new defect detection method based on the active electric field detection principle. In this study, we established an underwater defect detection experimental platform, and ...
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Inspired by the research on the active electrolocation organs of weakly electric fish in bionic engineering field, we proposed a new defect detection method based on the active electric field detection principle. In this study, we established an underwater defect detection experimental platform, and conducted joint time-frequency analysis and recognition algorithm on electric field signals collected during the experiment to obtain the joint time-frequency spectrogram (JTFS) and frequency inflection points (FIPs) of the detected objects. Through the JTFS and FIPs of the tested object (copper material) , we can get the defect size and position information and carry out further data processing in deeper exploration. This new defect detection method not only increases the types of defect detection methods, but also broadens the application range of active electric field. The study starts from the perspective of engineering experiments and demonstrates the feasibility and effectiveness of the novel defect detection method.
