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Vanillin cross-linked hydrogel membranes interfacial reinforced by carbon nitride nanosheets for enhanced antibacterial activity and mechanical properties

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Chinese Chemical Letters 2023年第4期34卷 164-171页

作者： Umer Shahzad Malik Qixiang Duan Muhammad Bilal K.Niazi zaib jahan Usman Liaqat Farooq Sher Yanchang Gan Honghao Hou School of Chemical and Materials Engineering National University of Sciences and TechnologyIslamabad 44000Pakistan Guangdong Provincial Key Laboratory of Construction and Detection in Tissue Engineering School of Basic Medical ScienceSouthern Medical UniversityGuangzhou 510515China Department of Engineering School of Science and TechnologyNottingham Trent UniversityNottingham NG118NSUnited Kingdom

Biopolymer based hydrogels are highly adaptable, compatible and have shown great potential in biological tissues in biomedical applications. However, the development of bio-based hydrogels with high strength and effective antibacterial activity remains challenging. Herein, a series of vanillin-cross-linked chitosan nanocomposite hydrogel interfacially reinforced by g-C_(3)N_(4)nanosheet carrying starch-caped Ag NPs were prepared for wound healing applications. The study aimed to enhance the strength, sustainability and control release ability of the fabricated membranes. Starch-caped silver nanoparticles were incorporated to enhance the anti-bacterial activities The fabricated membranes were assessed using various characterization techniques such as FT-IR, XRD, SEM, mechanical testing, Gel fraction and porosity alongside traditional biomedical tests i.e., swelling percentage, moisture retention ability, water vapor transmission rate, oxygen permeability, anti-bacterial activity and drug-release of the fabricated membranes. The mechanical strength reached as high as 25.9 ± 0.24 MPa for the best optimized sample. The moisture retention lied between 87%–89%, gel fraction 80%–85%, and water vapor transmission up to 104 ± 1.9g m^(-2)h^(-1)showing great properties of the fabricated membrane. Swelling percentage surged to 225% for blood while porosity fluctuated between 44% ± 2.1% and 52.5% ± 2.3%. Oxygen permeability reached up to 8.02 mg/L showing the breathable nature of fabricated membranes. The nanocomposite membrane shown excellent antibacterial activity for both gram-positive and gram-negative bacteria with a maximum zone of inhibition 30 ± 0.25 mm and 36.23 ± 0.23 mm respectively. Furthermore, nanoparticles maintained sustainable release following non-fickian diffusion. The fabricated membrane demonstrated the application of inorganic filler to enhance the strength of biopolymer hydrogel with superior *** results envisage the potential of synthesized m

关键词： Green synthesis Sustainable membranes Starch capped silver nanoparticles g-C_(3)N_(4)nanosheets Wound dressing Antibacterial

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Design and Implementation of an Android-based Control Laboratory

Design and Implementation of an Android-based Control Labora...

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第三十九届中国控制会议

作者： Lei Cao Guo-Ping Liu Wenshan Hu jahan zaib Bhatti Harbin Institute of Technology Wuhan University

This paper introduces the NCSLab（Networked Control System Laboratory） based on Android mobile phone, which provides a complete android-based solution for users to carry out experiments on experiment devices. An extensible architecture is proposed, which consists of Android mobile phone, MATLAB server, control units, experiment equipment and IP camera. Based on this architecture, a remote laboratory based-on Android is implemented, which has many novel functionalities including block diagram programming, simulation, compilation and especially automatic downloading of executable program and executing it on device. At the same time, the Android mobile phone is not only playing the role of design platform, but also a controller of the experiment devices. In this way, it can free the users from having to stay with the PC. At last, an example is given to demonstrate that users can easily design programs and compile, download, execute and monitor for an experiment with a compact, low-cost and handy android mobile phone from anywhere.

关键词： NCSLab Android mobile phone remote laboratory MATLAB

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