Relationship Between Triboelectric Charging and Surface Modification of Human Hair: Polymeric Versus Monomeric Long Alkyl Chain Quaternary Ammonium Salts

Abstract

Triboelectric charging of hair modified by surface deposition of a series of monomeric and polymeric long alkyl chain quaternary ammonium salts was examined. The length of the hydrophobic alkyl chain in both monomeric and polymeric surfactants, the composition of copolymer-containing surfactant and nonsurfactant units, and the concentration of the treatment solution are the factors determining the sign and mag nitude of generated tribo-charges. The results were interpreted in terms of effective work function of modified fibers dependent upon surface concentration and com position of adsorbed species.

Surface roughness and wettability of wool fabrics loaded with silver nanoparticles: Influence of synthesis and application methods

“…The highest concentration of lecithin in the colloidal solution can cause a higher affinity to wool fibre due to higher surface charges. 30 Loading at the highest lecithin concentration by exhaustion and pad–dry–cure methods causes the higher fibre roughness, which confirms the higher uptake of silver nanoparticles by the methods mentioned at the nanometer scale. However, in case of the in situ method, the wool fibre roughness decreased with lecithin presence.…”

“…Creating roughness on the hydrophobic substrate of micrometre dimensions can enhance hydrophobicity. 30 An increase in fibre roughness by the in situ method leads to an increase of the water contact angle, because the fatty layer was not altered and only its roughness was increased; at the same time, an increase of yarns amplitude S t (Table 3) seems to control the hydrophobic character of the fabric. On the other hand, in the use of the pad–dry–cure method, an increase of fibre roughness slightly reduces their hydrophobicity.…”

Advanced Triboelectric Applications of Biomass-Derived Materials: A Comprehensive Review

“…Chemically treated keratin, a fibrous protein abundantly found in hair, feathers, nails, and horns, marks a groundbreaking advancement in the development of triboelectric materials [125][126][127] (Figure 11b,c). This innovative approach harnesses keratin's natural properties through chemical treatments to significantly enhance its energy harvesting capabilities, positioning it as a sustainable and bio-inspired solution for TENGs.…”

“…triboelectric materials [125][126][127] (Figure 11b,c). This innovative approach harnesses keratin's natural properties through chemical treatments to significantly enhance its energy harvesting capabilities, positioning it as a sustainable and bio-inspired solution for TENGs.…”

Reaction-diffusion effects and spatiotemporal oscillations under SEM, STM and AFM-assisted charging in fiber-like and wire-like systems: From molecular and quantum wires to cooperative ferroelectric nanofibers and microfibers

“…At the same time, it is obvious that AFMs cannot be used for the synchronous analysis of charging or charge transfer in such complex structures, while electron microscopy methods can be used for these purposes (since 1950s when specimen charging for latex particles was registered by TEM electron microscopes [104] ). SEM techniques can be used for the analysis of charging of macroscopic complex and cooperative fibers up to the micron-and decamicron-scale radius fibers (e.g., hair [105][106][107] ) (while AFMs can analyze the hair charging only at nanoscales, and not in a complex and mutual dependence of the charging of different hair fibers on each other [108,109] ). Consequently, SEM technique is more optimal for the analysis of cooperatively driven ferroelectric fibers then AFM.…”