It is essential to diagnose Parkinsonism at an early stage to prevent functional impairments in patients and improve their level of healthcare. However, low electrical signal transmission and poor stretchability limit the application of flexible hydrogel sensors in the early diagnosis of Parkinsonism. CGTX-IX composite hydrogels were prepared using carboxymethyl chitosan (CMCS), glyoxal, tannic acid (TA), and ionic liquid ([BMIM][Cl]). The CGTX-I3 composite hydrogel has reversible dynamic chemical bonds, such as imine and hydrogen bonds, and physical interactions. It exhibits good mechanical properties (elongation at break of 112.5% and tensile strength of 284.4 kPa) and excellent electrical conductivity (1.16 × 10⁻³ S cm⁻¹). Moreover, CGTX-I3 composite hydrogels have excellent adhesion to commonly used substrate materials, especially human skin (130.9 kPa). The CGTX-I3 hydrogel can also detect the deformation caused by an external force and human movements, such as finger bending, elbow movement, wrist movement, ankle movement, and other subtle human actions (such as swallowing and smiling). After 1000 cycles, the sensor can still maintain a stable sensitivity factor (GF = 2.14).

Due to green development in recent years, water-borne epoxy resins (WBE) have become increasingly popular since they generate the lowest level of volatile organic compounds (VOC) during curing. However, because of the large surface tension of water, it is easy to produce voids and cracks during the curing process of the coating. An electrochemical strategy was used in this study to assess the impact of different SiO₂ content on the corrosion performance of a WBE coating, in which micron spherical SiO₂ particles were synthesized in a liquid phase reduction. The results showed that the synthesized micron spherical SiO₂ particles were about 800 ± 50 nm in diameter and in an amorphous state. By hydrophilizing the surfaces of these SiO₂ particles, uniform dispersion in an aqueous solvent and a WBE can be achieved. It is important to note that adding a small or excessive amount of SiO₂ to a coating will not improve corrosion resistance and may even reduce corrosion resistance. With the appropriate modification of SiO₂, corrosion resistance of composite coatings is greatly enhanced, as is the adhesion between the coatings and the metallic substrates. Because the appropriately modified SiO₂ can effectively fill the pores that are formed during the curing process, a corrosive medium is less likely to react with the matrix when the medium comes into contact with the matrix. Based on their incorporation content of 3 wt.%, their corrosion resistance is the best after 16 cycles of AC-DC-AC accelerated corrosion tests.

Water treatment technology based on ultrafiltration (UF) faces the problem of severe membrane fouling due to its inherent hydrophobicity. The use of amphiphilic polymers that possess both hydrophobic and hydrophilic chain segments can be advantageous for the hydrophilic modification of UF membranes due to their excellent combination in the membrane matrix. In the present study, we examined a novel amphiphilic CA–g–AN material, constructed by grafting citric acid (CA) to aniline (AN), as a modified material to improve the hydrophilicity of a PES membrane. This material was more compatible with the polymer membrane matrix than a pure hydrophilic modified material. The polyethersulfone (PES) membranes modified by amphiphilic CA–g–AN demonstrated a higher water flux (290.13 L·m⁻²·h⁻¹), which was more than eight times higher than that of the pure PES membrane. Furthermore, the flux recovery ratio (FRR) of the modified membrane could reach 83.24% and the value of the water contact angle (WCA) was 76.43°, demonstrating the enhanced hydrophilicity and antifouling ability of the modified membranes. With this study, we aimed to develop a new amphiphilic polymer to improve the antifouling property and permeability of polymer-based UF membranes to remove organic pollutants from water.