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Effect of surfactant on dispersion of alumina in photopolymerizable monomers and their UV curing behavior for microstereolithography

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Title Effect of surfactant on dispersion of alumina in photopolymerizable monomers and their UV curing behavior for microstereolithography
 
Creator ADAKE, CV
BHARGAVA, P
GANDHI, P
 
Subject CERAMIC SUSPENSIONS
MICRO-STEREOLITHOGRAPHY
RHEOLOGY
POWDER
FABRICATION
MONOLAYERS
SOLVENTS
SYSTEMS
FORCES
Ceramic microstereolithography
Carboxylic acids
Double bond conversion
Colloidal gelation
Spatial resolution
 
Description Ceramic microstereolithography has recently emerged as a solid free form fabrication techniques for the fabrication of three-dimensional (3D) ceramic components of complex shapes. The spatial resolution of ceramic parts depends upon cure depth and cure width of UV curable ceramic suspensions. Ceramic particle size, its distribution and difference in the refractive indices between ceramic particles and UV curable monomer influence suspension microstructure which will be reflected in viscosity change and extent of colloidal gelation. Suspensions of alumina are formulated in a monomer having hydrophobic backbone structure (monomer chains terminating both ends with -CH2-) by dispersing alumina modified with suitable carboxylic acids (stearic acid and oleic acid). Another suspension was prepared just by dispersing as received alumina in a monomer having hydrophilic backbone structure (monomer chains terminating one end with -OH-). Suspensions exhibit different microstructures owing to solvency of adsorbed layer in monomer having hydrophobic backbone structure, interaction of hydroxyl groups present on alumina particles with monomer having hydrophilic backbone structure as revealed by dynamic rheology. We report effect of microstructure of these suspensions on UV curing behavior by monitoring C=C conversion. The spatial resolution of ceramic part is predicted by measuring cure depth and cure width for the suspensions cured in microstereolithography apparatus. (C) 2014 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
 
Publisher ELSEVIER SCI LTD
 
Date 2016-01-14T13:17:03Z
2016-01-14T13:17:03Z
2015
 
Type Article
 
Identifier CERAMICS INTERNATIONAL, 41(4)5301-5308
0272-8842
1873-3956
http://dx.doi.org/10.1016/j.ceramint.2014.12.066
http://dspace.library.iitb.ac.in/jspui/handle/100/17593
 
Language en