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Polylactic acid
Descriptive
TitleInfo
Title
Polylactic acid
SubTitle
a potential sustainable bio-based controlled release packaging polymer
Name
(type = personal)
NamePart
(type = family)
Arabi
NamePart
(type = given)
Saifanassour Ali
NamePart
(type = date)
1973-
DisplayForm
Saifanassour Arabi
Role
RoleTerm
(authority = RULIB)
author
Name
(type = personal)
NamePart
(type = family)
Yam
NamePart
(type = given)
Kit L
DisplayForm
Kit L Yam
Affiliation
Advisory Committee
Role
RoleTerm
(authority = RULIB)
chair
Name
(type = personal)
NamePart
(type = family)
LIU
NamePart
(type = given)
LINSHU
DisplayForm
LINSHU LIU
Affiliation
Advisory Committee
Role
RoleTerm
(authority = RULIB)
internal member
Name
(type = personal)
NamePart
(type = family)
Mir
NamePart
(type = given)
Nazir
DisplayForm
Nazir Mir
Affiliation
Advisory Committee
Role
RoleTerm
(authority = RULIB)
internal member
Name
(type = personal)
NamePart
(type = family)
Lee
NamePart
(type = given)
Dong Sun
DisplayForm
Dong Sun Lee
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
Graduate School - New Brunswick
Role
RoleTerm
(authority = RULIB)
school
TypeOfResource
Text
Genre
(authority = marcgt)
theses
OriginInfo
DateCreated
(qualifier = exact)
2012
DateOther
(qualifier = exact);
(type = degree)
2012-10
Place
PlaceTerm
(type = code)
xx
Language
LanguageTerm
(authority = ISO639-2b);
(type = code)
eng
Abstract
(type = abstract)
Polylactic acid (PLA), a bio-based polymer produced from fermentation of starch into lactic acid followed by polymerization process, is considered to be a sustainable packaging material. Stereochemical isomers, P-LLA and P-DLA, affect polymer final properties and can be used in controlled release packaging (CRP) to provide a wide range of release profile. CRP is a new generation of functional packaging materials in which the package acts as a delivery system for antimicrobials or antioxidants. The delivery occurs in a timely manner to increase shelf life and maintain safety and quality of the food. This study is divided into two parts. The first part aimed at investigating the effects of stereochemical isomers and processing conditions (drying and annealing) on release profile of tocopherol and film properties. The second part investigated the effect of two processing methods, solvent and extrusion casting, on tocopherol release kinetics and film properties. PLA containing different ratios of stereochemical isomers was impregnated with 3000ppm tocopherol using solvent casting and commercial scale extrusion casting methods to produce the films. The solution casting films were first dried at room temperature for 24 hours and further dried at 40°C. The films from both methods were annealed at 120°C for 4 hours. Then release study was conducted to monitor the release of tocopherol over time on the annealed and unannealed films. Results of the first part showed varied tocopherol release profiles and diffusivities (2.42X10-19 to 8.68X10-16m2/s) with three orders of magnitude. Annealing process increased film crystallinity, which led to lower diffusivity and slower tocopherol release. It also decreased water vapor and oxygen transmission rates of the films. Results of the second part showed that solvent casting and extruded films had different tocopherol release profiles but shared similar trend. Scanning electron microscopy performed on films from two methods revealed different topographies. The films from both methods were only comparable in terms of mechanical properties such as tensile strength. Overall, results suggest that while a wide range of tocopherol release profile using solvent casting method is achievable; data from solvent casting cannot extrapolate directly to extrusion casting in terms of tocopherol release profile.
Subject
(authority = RUETD)
Topic
Food Science
RelatedItem
(type = host)
TitleInfo
Title
Rutgers University Electronic Theses and Dissertations
Identifier
(type = RULIB)
ETD
Identifier
ETD_4297
PhysicalDescription
Form
(authority = gmd)
electronic resource
InternetMediaType
application/pdf
InternetMediaType
text/xml
Extent
xiii, 111 p. : ill.
Note
(type = degree)
Ph.D.
Note
(type = bibliography)
Includes bibliographical references
Note
(type = statement of responsibility)
by Saifanassour Ali Arabi
Subject
(authority = ETD-LCSH)
Topic
Polymerization
Subject
(authority = ETD-LCSH)
Topic
Polymers--Permeability
Subject
(authority = ETD-LCSH)
Topic
Controlled release technology
Identifier
(type = hdl)
http://hdl.rutgers.edu/1782.1/rucore10001600001.ETD.000066605
RelatedItem
(type = host)
TitleInfo
Title
Graduate School - New Brunswick Electronic Theses and Dissertations
Identifier
(type = local)
rucore19991600001
Location
PhysicalLocation
(authority = marcorg);
(displayLabel = Rutgers, The State University of New Jersey)
NjNbRU
Identifier
(type = doi)
doi:10.7282/T3RX99VK
Genre
(authority = ExL-Esploro)
ETD doctoral
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Rights
RightsDeclaration
(ID = rulibRdec0006)
The author owns the copyright to this work.
RightsHolder
(type = personal)
Name
FamilyName
Arabi
GivenName
Saifanassour
Role
Copyright Holder
RightsEvent
Type
Permission or license
DateTime
(encoding = w3cdtf);
(qualifier = exact);
(point = start)
2012-09-26 18:16:55
AssociatedEntity
Name
Saifanassour Arabi
Role
Copyright holder
Affiliation
Rutgers University. Graduate School - New Brunswick
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.
Copyright
Status
Copyright protected
Availability
Status
Open
Reason
Permission or license
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Technical
FileSize
(UNIT = bytes)
17451520
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windows xp
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ETD
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application/pdf
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application/x-tar
FileSize
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17459200
Checksum
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