Influence of particle parameters on deposition onto healthy and damaged human hair

• DOI: 10.1111/ics.12994
• Publication Date: 2024-08-13T03:03:47Z
• Authors: Huijun Phoebe Tham; Kah Yuen Yip; Srinivasulu Aitip...; Srinivasa Reddy M...; Wenguang Zhao; Ping Sen Choong; Ayca Altay Benetti; Wanjuan Evonne Gan; Fong Yew Leong; Praveen Thoniyot; Thomas L. Dawson
• Keywords: Particle deposition; Deposition; Particle (ecology)

This research investigates how particle parameters, such as zeta potential, size, functional group, material composition, and hydrophobicity affect their affinity deposition of particles onto hair. Streaming potential was used the technique for analysis. The streaming data obtained then converted to surface coverage data. Scanning electron microscopy (SEM) also done visualize localization on hair surface. study found stronger healthy than damaged (oxidatively bleached) hair, due diminished interaction sites from removal shaft's external lipid layer. SEM imaging supported these findings offered insights into localization. Hydrophilic silica accumulated along exposed hydrophilic cuticle edges hydrogen bonding with endocuticle. is hypothesized be limited binding hydrophobic In an abundance across results in more dispersed binding. Hydrogen electrostatic attraction were shown predominant forces influencing deposition, interactions playing a less influential role. studies proved that attractions work over longer range are effective at lower conditions compared which only start play bigger role higher concentrations. Steric hindrance bulky side groups acted significant repulsive force. Results revealed larger deposit poorly both smaller ones. Compared neutrally charged nanoparticles (SN-2), positively PMMA (PN+16) have highly (PN+49) depositing most rapidly. provides fundamental understanding particle-surface parameters influence damaging affects deposition.