Paper Number
PO98                         My Program 

Session
Poster Session

Title
Direct investigation of hair care deposition and removal

Presentation Date and Time
October 16, 2024 (Wednesday) 6:30

Track / Room
Poster Session / Waterloo 3 & 4

Authors (Click on name to view author profile)

1. Hasanova, Nazrin (Lehigh University, Chemical and Biomolecular Engineering)
2. Weeks, Alyssa (Lehigh University, Department of Chemical and Biomolecular Engineering)
3. Gao, Sarah (Lehigh University, Department of Chemical and Biomolecular Engineering)
4. Riley, John K. (The Dow Chemical Company)
5. Gilchrist, James F. (Lehigh University, Department of Chemical and Biomolecular Engineering)

Author and Affiliation Lines (in printed abstract book)
Nazrin Hasanova¹, Alyssa Weeks¹, Sarah Gao¹, John K. Riley² and James F. Gilchrist^1
1Department of Chemical and Biomolecular Engineering, Lehigh University, Bethlehem, PA; ²The Dow Chemical Company, Collegeville, PA

Speaker / Presenter 
Hasanova, Nazrin

Keywords
experimental methods; emulsions; methods; surfactants

Text of Abstract
Our research explores the deposition of dirt and cleansing agents on hair strands to evaluate hair care products. We fabricated PDMS microfluidic devices encapsulating a hair strand and flow an oil/silica particle emulsion onto the hair surface, followed by various shampoo and conditioner solutions, to lift the impurities off the hair strand. We use high-speed confocal laser scanning microscopy to image the behavior of these oil droplets and particles as they are deposited on and removed from the hair surface. Using Matlab and ImageJ, we quantified the flow kinematics, local shear profiles, and observed the impact of the degree of deposition, surface coverage, and droplet sizes. This approach serves as a benchmark for testing various additives and could prove to be a robust way to analyze the interplay between interfacial chemistry and solution rheology.