Investigation of oleic acid as a dispersant for hydroxyapatite powders for use in ceramic filled photo-curable resins for stereolithography

被引：5

作者：

Kennedy, Brendan M. ^{[1
,2
]}

De Barra, Eamonn ^{[3
]}

Hampshire, Stuart ^{[3
]}

Kelleher, Maura C. ^{[1
,2
]}

机构：

[1] Technol Univ Dublin, Sch Mech Engn, Bolton St, Dublin 1, Ireland

[2] Technol Univ Dublin, Environm Sustainabil & Hlth Inst, Dublin, Ireland

[3] Univ Limerick, Bernal Inst, Limerick, Ireland

来源：

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY | 2023年 / 43卷 / 15期

关键词：

Hydroxyapatite; Oleic acid; Stereolithography; Ceramic bone scaffold; Additive manufacturing; MECHANICAL-PROPERTIES; SUSPENSIONS; BEHAVIOR; SCAFFOLDS; STRENGTH; SIZE; DENSIFICATION; BIOCERAMICS; FABRICATION; PARTICLES;

D O I：

10.1016/j.jeurceramsoc.2023.07.028

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Stereolithography allows production of porous hydroxyapatite scaffolds for bone regeneration but is limited by the challenging rheology of ceramic filled resins. Oleic acid, a natural fatty acid, was applied in concentrations of 0.0-0.3 wt% to improve the rheological properties of HAp resins for the fabrication of solid cylinders and scaffolds by digital light processing (DLP) printing in a wiperless system. Bonding by chemisorption was confirmed by FTIR analysis. The powders were then incorporated into a photo-curable resin of 1-6 hexanediol diacrylate at 18-30 vol%. The shear viscosity and sedimentation rates of photocurable resins containing HAp powder decreased with increasing concentration of oleic acid. The curing depth and width of resins containing the HAp were unchanged as a result of the presence of oleic acid. Oleic acid improved the printing behaviour of the resins allowing the fabrication of scaffolds with continuous macro-porosity on a wiperless DLP system.

引用

页码：7146 / 7166

页数：21