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Surface modification of hydroxyapatite. Part I. Dodecyl alcohol

Paper ID Volume ID Publish Year Pages File Format Full-Text
12762 816 2003 9 PDF Available
Title
Surface modification of hydroxyapatite. Part I. Dodecyl alcohol
Abstract

The influence of esterification reactions on the surface chemistry and colloid stability of hydroxyapatite (HAP) was studied by aging nanophase HAP in dodecyl alcohol at elevated temperatures (115°C and 190°C). The esterified HAP particles were characterized by X-ray diffraction, transmission electron microscopy, diffuse reflectance infra-red Fourier transform spectroscopy (DRIFTS), thermal gravimetric analysis, sedimentation time studies, and electrophoretic mobility (μ) measurements in water and ethyl alcohol. DRIFTS analysis revealed that the HAP surface was modified by dodecyl groups based on the appearance of C–H stretch vibrational modes at 2962, 2930, and 2860 cm−1. Dodecyl alcohol modified HAP exhibited a larger TGA mass loss upon heating (up to 4.8%) compared to untreated HAP (2.5–3.2 wt%). Sedimentation studies revealed the following stability trends: HAP dispersed in water was approximately the same as esterified HAP in water (a few hours)

Keywords
Hydroxyapatite; Surface modification; Dodecyl alcohol; Surface esterification; Colloid stability
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Publisher
Database: Elsevier - ScienceDirect
Journal: Biomaterials - Volume 24, Issue 21, September 2003, Pages 3671–3679
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
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