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Topic Review
Influencing Factors of Heat Generation
Rubber composites are extensively used in industrial applications for their exceptional elasticity. The fatigue temperature rise occurs during operation, resulting in a serious decline in performance. Reducing heat generation of the composites during cyclic loading will help to avoid substantial overheating that most likely results in the degradation of materials. Influencing factors of heat generation are highlighted, including the Payne effect, Mullins effect, interface interaction, crosslink density, bond rubber content, and fillers. 
  • 397
  • 20 Feb 2023
Topic Review
Nanoparticles in Drug Delivery
Nanoparticles exhibit unique physical, chemical, and biological properties, which have led to their widespread applications in various fields. The properties of nanoparticles, including size, surface area, surface chemistry, optical properties, magnetic properties, and mechanical properties, can be tuned by changing the size, shape, and composition of nanoparticles. With ongoing research and development, nanoparticles are expected to play an increasingly important role in various fields, including medicine, electronics, energy, and environmental science.
  • 455
  • 20 Feb 2023
Topic Review
Fabrication of SiC Membranes
The scale of research for developing and applying silicon carbide (SiC) membranes for gas separation has rapidly expanded over the last few decades. The precursor-derived ceramic approaches for preparing SiC membranes include chemical vapor deposition (CVD)/chemical vapor infiltration (CVI) deposition and pyrolysis of polymeric precursor. Generally, SiC membranes formed using the CVD/CVI deposition route have dense structures, making such membranes suitable for small-molecule gas separation. On the contrary, pyrolysis of a polymeric precursor is the most common and promising route for preparing SiC membranes, which includes the steps of precursor selection, coating/shaping, curing for cross-linking, and pyrolysis. Among these steps, the precursor, curing method, and pyrolysis temperature significantly impact the final microstructures and separation performance of membranes.
  • 631
  • 19 Feb 2023
Topic Review
Perylene Diimide Bioconjugates
Perylene diimide (PDI) has attracted attention owing to its chemical robustness, thermal and photo-stability, and outstanding optical and electronic properties.
  • 1.0K
  • 18 Feb 2023
Topic Review
Pt-Based Catalysts in Proton Exchange Membrane Fuel Cells
Proton exchange membrane fuel cells (PEMFCs) have attracted extensive attention because of their high efficiency, environmental friendliness, and lack of noise pollution. However, PEMFCs still face many difficulties in practical application, such as insufficient power density, high cost, and poor durability. The main reason for these difficulties is the slow oxygen reduction reaction (ORR) on the cathode due to the insufficient stability and catalytic activity of the catalyst. It is very important to develop advanced platinum (Pt)-based catalysts to realize low Pt loads and long-term operation of membrane electrode assembly (MEA) modules to improve the performance of PEMFC. By designing the structure of a Pt-based catalyst, it can be generated on a special surface structure, so as to boost the stability and activity of Pt-based catalysts, such as low-dimensional nanostructures (e.g., two-dimensional nanoplates and one-dimensional nanowires). These structures not only have high conductivity, but can also make sure the nanocrystals are fully in contact with the support and effectively inhibit Ostwald ripening, with excellent stability.
  • 928
  • 17 Feb 2023
Topic Review
Near-Infrared Emission Materials with “Heavy Metal-Free” Organic Compounds
Organic/polymer light-emitting diodes (OLEDs/PLEDs) have attracted a rising number of investigations due to their promising applications for high-resolution fullcolor displays and energy-saving solid-state lightings. Near-infrared (NIR) emitting dyes have gained increasing attention for their potential applications in electroluminescence and optical imaging in optical tele-communication platforms, sensing and medical diagnosis in recent decades. And a growing number of people focus on the “heavy metal-free” NIR electroluminescent materials to gain more design freedom with cost advantage. 
  • 382
  • 17 Feb 2023
Topic Review
Magnetic Bacterial Cellulose Biopolymers
Bacterial cellulose (BC) is a biopolymer that has been widely investigated due to its useful characteristics, such as nanometric structure, simple production and biocompatibility, enabling the creation of novel materials made from additive BC in situ and/or ex situ. 
  • 366
  • 17 Feb 2023
Topic Review
Green Extraction Techniques for Active Ingredients in Tea
The so-called “Green Extraction”—which is based on the design of different extraction processes for the reduction in energy consumption, as well as the usage of alternative solvents and renewable natural materials —was developed.
  • 1.9K
  • 17 Feb 2023
Topic Review
Donor–Acceptor Covalent Organic Frameworks for Photocatalytic Hydrogen Production
The depletion of traditional fossil energy and the resulting environmental pollution forces people to explore new energy sources. Direct use of solar energy is now a viable solution for solving these problems. Covalent organic frameworks (COFs) are a porous crystalline material; their well-defined two-dimensional or three-dimensional frameworks can ensure the orderly arrangement of photoelectric active units, giving them potential photoelectric conversion applications. The tunable structural features endow COFs many advantages in photocatalytic hydrogen production under visible light.
  • 362
  • 16 Feb 2023
Topic Review
Bio-Based Monomers
Bioplastics are polymers made from sustainable bio-based feedstocks. The potential of producing bio-based monomers in microbes has been investigated for decades, their economic feasibility is still unsatisfactory compared with petroleum-derived methods.
  • 1.0K
  • 16 Feb 2023
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