Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 52 for “"Poly(lactic acid)"”.
-
Biopolymer foams from Novatein thermoplastic protein and poly(lactic acid)
… has been blended with another biodegradable polymer with good mechanical properties, polylactic acid (PLA). Blending two components can lead to poor mechanical properties of the blend due to weak interfacial adhesion and thermodynamic incompatibility. These problems can be overcome with the …
-
Improved Properties of Poly (Lactic Acid) with Incorporation of Carbon Hybrid Nanostructure
Poly(lactic acid) is biodegradable polymer derived from renewable resources and non-toxic, which has become most interested polymer to substitute petroleum-based polymer. However, it has low glass transition temperature and poor gas barrier properties to restrict the application on hot contents …
-
3D printed-poly(lactic acid) scaffolds with improved bioactivity for bone tissue engineering
… engineering. A simple mussel inspired method, polydopamine (PDA) surface functionalization, has being proposed as an efficient way to enhance the bioactivity of biomaterials, such as PLA, and to promote covalent immobilization of a variety of proteins such as collagen (COL) type I. This study …
-
Synthesis and characterization of a novel biodegradable polymer--poly (lactic acid-co-lysine)
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Chemistry, 1993.
-
Production of biodegradable poly lactic acid from pineapple industry wastewater by lactobacillus casei fermentation
… of this study is to produce biodegradable poly lactic acid (PLA) from pineapple industry waste water by Lactobacillus casei. The L. caseiwas cultivated with a medium containing extracted glucose for 24 h. The optimisation of cultural conditions (temperature, pH, inoculum size, nitrogen …
-
The evaluation of RGD-peptide modified poly(lactic acid-co-lysine) as a resorbable, interactive biomaterial
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Chemical Engineering, 1996.
-
Study of poly (l-lactic acid)/poly (d-lactic acid) stereocomplex as nucleating agent for poly (l- lactic acid) crystallization
Poly (lactic acid) (PLA) is a biodegradable polymer with good renewability and processability. However, it has some drawbacks. The Poly (lactic acid) (PLA) stereocomplex formed via the interaction between optical isomers Poly (L-lactic acid) (PLLA) and Poly (D-lactic acid) (PDLA), provides …
-
Polymer structure and property studies in elongational rheology, spherulite deformation, and biaxial strain induced crystallization
… rheological investigation of well characterized polyethylene samples. Elongational stress growth measurements as well as dynamic shear experiments demonstrated that the rheological response of molten polyethylene was sensitive to both molecular weight distribution and shear modification. The …
-
Biodegradable, Liquid-Filled, Spherical Capsules With Pre-Determined Burst Times
A biodegradable poly(lactic acid-co-glycolic acid) (PLGA) capsule is presented in a spherical geometry, which exploits the principle of osmosis as an internal program to achieve a delayed-burst release of its load. The capsule burst lag-time is accurately predicted by modeling the rate of water …
-
3D BIO-PRINTED SCAFFOLDS FOR TISSUE ENGINEERING AND REGENERATION: AN INVIVO EVALUATION WITH FURTHER OPTIMIZATION
… in some subjects. Combining the scaffold with a Poly(ethylene) Glycol – Fibrinogen (PF) Hydrogel preliminarily improved bioactivity and catalysed cell differentiation. Likewise, co-blending the polycaprolactone scaffold with Poly(lactic acid-co-ɛ-caprolactone) which would theoretically improve …
-
The design, synthesis and properties of pressure-processable biodegradable block copolymers
In this thesis, biodegradable block copolyesters were specifically designed and synthesized for their susceptibility to pressure-induced mixing. These baroplastic materials are capable of being processed and molded through the application of pressure at temperatures far below those needed in …
-
Structure-Property Evaluation of the Dielectric Properties of Radar Absorbing Materials in Free Space
… EM radiation. For this work, several commercial polymer matrices were used with 4 additives, i.e., graphite flake (GF), graphite powder (GP), iron powder (CIP), and carbon black (CB), at varying loading levels to understand the structure-property relationships that affect dielectric properties in …
-
Uniform double wall microspheres/microcapsules for protein delivery
Biodegradable polymer devices have been utilized as a means to deliver drugs in a controlled and less invasive manner. Poly (lactide-co-glycolide) (PLG) and poly (lactic acid) (PLA) microparticles such as double-wall/single-wall microspheres and microcapsules were heavily investigated for …
-
Induction of Immunogenic Cell Death via Nanoparticle-Mediated Dual Chemotherapy and Photothermal Therapy
… (DAMPs). NPs were made from biocompatible polymers, poly(lactic acid)-b-poly(ethylene glycol) and bovine serum albumin. Both NPs were loaded with doxorubicin, a chemotherapeutic agent, and indocyanine green, a PTT agent that can absorb the light in near infrared (NIR) region and convert it …
-
The polymerization of lactic acid anhydrosulphite by anionic initiators
… is primarily concerned with the synthesis and polymerization of 5-methyl-1;3, 2-dioxathiolan-4-one-2-oxide (lactic acid anhydrosulphite (LAAS)) using anionic initiators under various conditions. Poly(lactic acid) is a biodegradable polymer which finds many uses in biomedical applications such …
-
Fighting cancer with nanomedicine−drug-polyester nanoconjugates for targeted cancer therapy
The aim of my Ph. D. research is to develop drug-polyester nanoconjugates (NCs) as a novel translational polymeric drug delivery system that can successfully evade non-specific uptake by reticuloendothelial system (RES) and facilitate targeted cancer diagnosis and therapy. By uniquely integrating …
-
Synthetic vascular materials via a vaporization of sacrificial component (VaSC) approach
… (VaSC). The chosen sacrificial material, poly(lactic acid) (PLA), can be easily incorporated into composites and undergoes a solid-to-gas transition at ca. 280 oC, which allows for the extraction of the gaseous product from the composite leaving hollow spaces in the matrix. The fabrication …
-
Synthesis and evaluation of novel polymer modifiers for biodegradable polymers
The effects of ester plasticizers and copolymers on the mechanical properties of the natural biodegradable polymers, poly(3-hydroxybutyrate) [PHB] and poly(lactic acid) [PLA] have been studied after subjecting to melt processing conditions. Ester plasticizers were synthesized from citric, tartaric …
Page 1 of 3