Toutam, Vijaykumar and Jain, Puneet and Sharma, Rina and Bathula, Sivaiah and Dhar, Ajay (2015) Radius ratio rule for surface hydrophilization of polydimethyl siloxane and silica nanoparticle composite. Applied Surface Science, 349. pp. 196-199. ISSN 0169-4332

PDF - Published Version Restricted to Registered users only Download (945Kb) | Request a copy

Abstract

Polydimethyl siloxane (PDMS) and Silica (SiO2) nanoparticle composite blocks of three different batches (CB1-CB3) made by varying the size of SiO2 nanoparticles (NP), are studied for the degree of hydrophilization and retainability after oxidation by contact angle measurements (CA) and force distance spectroscopy (FDS) using Atomic Force Microscope (AFM). While CA measurements have shown high hydrophilization and retainability for CB3, F-D spectroscopy has reiterated the observation and has shown long range interactive forces and high Debye length of the electrostatic double layer formed. These results are in agreement with the radius ratio rule of binary sphere system for high density packing in the composite and thereby for strong hydrophilization and retainability due to reinforcement and restricted diffusion of uncured polymer.

Item Type:	Article
Uncontrolled Keywords:	Microfluidic PDMSContact angle F-D spectroscopy Electrostatic double layera
Subjects:	Chemistry > Physical Chemistry Materials Science Applied Physics/Condensed Matter
Divisions:	UNSPECIFIED
Depositing User:	Dr. Rajpal Walke
Date Deposited:	06 Oct 2016 07:02
Last Modified:	06 Oct 2016 07:02
URI:	http://npl.csircentral.net/id/eprint/1968

Actions (login required)

View Item