Staff View
Sol-gel synthesis of calcium phosphate powders

Descriptive

TitleInfo
Title
Sol-gel synthesis of calcium phosphate powders
Name (type = personal)
NamePart (type = family)
SARHAN
NamePart (type = given)
AHMED
NamePart (type = date)
1979-
DisplayForm
AHMED SARHAN
Role
RoleTerm (authority = RULIB)
author
Name (type = personal)
NamePart (type = family)
Klein
NamePart (type = given)
Lisa Carol
DisplayForm
Lisa Carol Klein
Affiliation
Advisory Committee
Role
RoleTerm (authority = RULIB)
chair
Name (type = personal)
NamePart (type = family)
Safari
NamePart (type = given)
Ahmad
DisplayForm
Ahmad Safari
Affiliation
Advisory Committee
Role
RoleTerm (authority = RULIB)
internal member
Name (type = personal)
NamePart (type = family)
Mann
NamePart (type = given)
Adrian
DisplayForm
Adrian Mann
Affiliation
Advisory Committee
Role
RoleTerm (authority = RULIB)
internal member
Name (type = personal)
NamePart (type = family)
Goel
NamePart (type = given)
Ashutosh
DisplayForm
Ashutosh Goel
Affiliation
Advisory Committee
Role
RoleTerm (authority = RULIB)
internal member
Name (type = personal)
NamePart (type = family)
Jitianu
NamePart (type = given)
Andrei
DisplayForm
Andrei Jitianu
Affiliation
Advisory Committee
Role
RoleTerm (authority = RULIB)
outside member
Name (type = corporate)
NamePart
Rutgers University
Role
RoleTerm (authority = RULIB)
degree grantor
Name (type = corporate)
NamePart
School of Graduate Studies
Role
RoleTerm (authority = RULIB)
school
TypeOfResource
Text
Genre (authority = marcgt)
theses
OriginInfo
DateCreated (qualifier = exact)
2019
DateOther (qualifier = exact); (type = degree)
2019-01
CopyrightDate (encoding = w3cdtf)
2019
Place
PlaceTerm (type = code)
xx
Language
LanguageTerm (authority = ISO639-2b); (type = code)
eng
Abstract (type = abstract)
Materials that are used for biomedical or clinical applications are known as biomaterials. These materials are made in different forms according to their functionality and the body part they will repair. Biocompatibility, biofunctionality, and bioavailability are three significant factors in selecting these materials, as they might be bioinert, resorbable, or bioactive like hydroxyapatite.
Hydroxyapatite (HAp), chemical formula Ca10(PO4)6(OH)2, having a calcium to phosphorus ratio of 1.667, has received special interest in the field of biomaterials as it is well known to be an inorganic bioactive material capable of forming chemical bonds with bones and teeth, besides promoting tissue engineering and bone growth for the treatment of infected or damaged organs. It is chemically and crystallographically similar to the main minerals in bones, dentin, and enamel where no toxicity or inflammation of a foreign body response has occurred. Affinities of biopolymers, and the high osteogenic potential of promoting bone in-growth and osteoconduction, are common reasons for synthetic HAp to dominate the field of biomaterials.
HAp ceramics are mostly limited to applications of low mechanical loads. In use, this may mean that the HAp is used in conjunction with a polymer in a composite. Consideration is given to using HAp powders in 3D printing. By using 3D printing, it is possible to control the pore size and pore distribution of composite scaffolds. Since the characteristics of the HAp powders influence the ability to print bone scaffolds, it is interesting to compare their properties.
There are numerous synthesis methods and approaches to produce HAp. In this study, hydroxyapatite is prepared by the sol-gel method, where precursors are subjected to high temperatures treatment after a gel-like network is formed. These powders are compared to HAp prepared by the hydrothermal method, where the precursors react in an aqueous solution under high temperature and pressure to synthesize HAp crystals. Both materials have been studied in comparison to a commercial HAp powder obtained from a manufacturer (FLUIDINOVA, S.A). This study focuses on the differences of preparation methodology, the resulting microstructures, phase composition, particle size and crystallinity.
The sol-gel method provided a homogeneous molecular mixing at a low processing temperature (<95°C). The resulting apatite structure mainly depended on the choice of the precursors and the sintering temperature. For comparison, the hydrothermal technique produced crystalline HAp in one step without requiring post heat treatment to crystallize. HAp formed directly from the aqueous solution in a sealed vessel at high pressure and temperature of 150°C.
Phase identification by X-ray diffraction analysis, microstructure analysis (FESEM), nitrogen surface area (BET), particle size, differential thermal analysis was performed on the samples of the HAp powders. Higher crystallinity, higher surface area, high pore volume, a narrow range of particle sizes, and a needle-like morphology point to the fact that hydrothermal HAp powder is a preferred choice for 3D printing applications.
Subject (authority = RUETD)
Topic
Materials Science and Engineering
Subject (authority = ETD-LCSH)
Topic
Biomedical materials--Synthesis
RelatedItem (type = host)
TitleInfo
Title
Rutgers University Electronic Theses and Dissertations
Identifier (type = RULIB)
ETD
Identifier
ETD_9434
PhysicalDescription
Form (authority = gmd)
electronic resource
InternetMediaType
application/pdf
InternetMediaType
text/xml
Extent
1 online resource (88 pages) : illustrations
Note (type = degree)
Ph.D.
Note (type = bibliography)
Includes bibliographical references
Note (type = statement of responsibility)
by Ahmed Ahmed Sarhan
RelatedItem (type = host)
TitleInfo
Title
School of Graduate Studies Electronic Theses and Dissertations
Identifier (type = local)
rucore10001600001
Location
PhysicalLocation (authority = marcorg); (displayLabel = Rutgers, The State University of New Jersey)
NjNbRU
Identifier (type = doi)
doi:10.7282/t3-ar15-jp86
Genre (authority = ExL-Esploro)
ETD doctoral
Back to the top

Rights

RightsDeclaration (ID = rulibRdec0006)
The author owns the copyright to this work.
RightsHolder (type = personal)
Name
FamilyName
SARHAN
GivenName
AHMED
Role
Copyright Holder
RightsEvent
Type
Permission or license
DateTime (encoding = w3cdtf); (qualifier = exact); (point = start)
2018-12-16 02:46:45
AssociatedEntity
Name
AHMED SARHAN
Role
Copyright holder
Affiliation
Rutgers University. School of Graduate Studies
AssociatedObject
Type
License
Name
Author Agreement License
Detail
I hereby grant to the Rutgers University Libraries and to my school the non-exclusive right to archive, reproduce and distribute my thesis or dissertation, in whole or in part, and/or my abstract, in whole or in part, in and from an electronic format, subject to the release date subsequently stipulated in this submittal form and approved by my school. I represent and stipulate that the thesis or dissertation and its abstract are my original work, that they do not infringe or violate any rights of others, and that I make these grants as the sole owner of the rights to my thesis or dissertation and its abstract. I represent that I have obtained written permissions, when necessary, from the owner(s) of each third party copyrighted matter to be included in my thesis or dissertation and will supply copies of such upon request by my school. I acknowledge that RU ETD and my school will not distribute my thesis or dissertation or its abstract if, in their reasonable judgment, they believe all such rights have not been secured. I acknowledge that I retain ownership rights to the copyright of my work. I also retain the right to use all or part of this thesis or dissertation in future works, such as articles or books.
RightsEvent
Type
Embargo
DateTime (encoding = w3cdtf); (qualifier = exact); (point = start)
2019-01-31
DateTime (encoding = w3cdtf); (qualifier = exact); (point = end)
2020-01-31
Detail
Access to this PDF has been restricted at the author's request. It will be publicly available after January 31st, 2020.
Copyright
Status
Copyright protected
Availability
Status
Open
Reason
Permission or license
Back to the top

Technical

RULTechMD (ID = TECHNICAL1)
ContentModel
ETD
OperatingSystem (VERSION = 5.1)
windows xp
CreatingApplication
Version
1.4
ApplicationName
Neevia Document Converter Pro v6.9 (http://neevia.com)
DateCreated (point = start); (encoding = w3cdtf); (qualifier = exact)
2018-12-16T02:23:23
DateCreated (point = start); (encoding = w3cdtf); (qualifier = exact)
2018-12-16T02:23:23
Back to the top
Version 8.3.13
Rutgers University Libraries - Copyright ©2021