Aim: Characterization of poly (D, L-lactic acid)/monomethylether terminated/polyethylene glycol (Me. PEG-PLA) block copolymers nanoparticles.
Methods: Me. PEG-PLA block copolymers were prepared by bulk polymerization. A series of nanoparticles were made from Me. PEG-PLA block copolymer by modified spontaneous emulsion-solvent evaporation technique.
Results And Conclusion: The structure of copolymer was performed by means of 1HNMR and FT-IR. The morphological examination of nanoparticles was performed by means of atomic force microscope (AFM). Results indicated that nanoparticles exhibited a smooth spherulite and core-shell structure. The hydrophilic shell is consisted of PEG segments and hydrophobic core is consisted of PLA segments. Zeta potential of nanoparticles was zero and further indicated core-shell structure. The particle size and size distribution of nanoparticles were measured by laser light scattering technique. The effective particle size range was from 70 to 160 nm and showed a normal distribution.
Download full-text PDF |
Source |
|---|
Publication Analysis
Top Keywords
Similar Publications
Controlling the Morphology of Poly(ethylene glycol)-b-poly(lactide) Self-Assemblies in Solution: Interplay of Homopolymer Additives and Kinetic Traps.
Nanomaterials (Basel)
December 2024
School of Materials Science & Engineering, Nanyang Technological University, Singapore 639798, Singapore.
This study investigates the effects of homopolymer additives and kinetic traps on the self-assembly of poly(ethylene glycol)-b-poly(lactide) (PEG-PLA) block copolymer (BCP) nanostructures in aqueous environments. By using non-adsorbing PEG homopolymers to kinetically trap PEG-PLA nanostructures, we demonstrate that varying the concentration and molecular weight of the added PEG induces a reversible micelle-to-vesicle transition. This transition is primarily driven by changes in the molecular geometry of the PEG-PLA BCPs due to excluded volume screening effects.
View Article and Find Full Text PDFPrevention of Protein Adsorption and Macrophage Phagocytosis of Perfluorocarbon-Based Microsized Core-Shell Artificial Oxygen Carriers by Facile PEG Coatings.
ACS Appl Mater Interfaces
December 2024
Department of Chemical System Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo 113-8656, Japan.
Polyethylene glycol (PEG)-coated microsized artificial oxygen carriers (AOCs) with a perfluorooctyl bromide (PFOB) core and poly(lactide--caprolactone) (PLC) shell were successfully fabricated using Shirasu porous glass (SPG) membrane emulsification. The PEG coating was achieved by adding the polylactide--polyethylene glycol--polylactide (PLA-PEG-PLA) block copolymer to the disperse phase during the SPG membrane emulsification process. During the DCM evaporation process, the three-layer structure of the PEG layer, PLC shell, and PFOB core of the AOCs spontaneously formed by phase separation.
View Article and Find Full Text PDFPreparation of transferrin-targeted temozolomide nano-micelles and their anti-glioma effect.
PeerJ
September 2024
Department of Neurosurgery, Putuo Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, China.
Objectives: This study aims to develop brain-targeted temozolomide (TMZ) nanograins using the biodegradable polymer material PEG-PLA as a carrier. The model drug TMZ was encapsulated within the polymer using targeted nanotechnology. Key characteristics such as appearance, particle size, size distribution, drug loading capacity, release rate, stability, and anti-tumor effects were systematically evaluated through experiments.
View Article and Find Full Text PDFNucleolin-targeted doxorubicin and ICG co-loaded theranostic lipopolymersome for photothermal-chemotherapy of melanoma in vitro and in vivo.
Eur J Pharm Biopharm
September 2024
Pharmaceutical Research Center, Pharmaceutical Technology Institute, Mashhad University of Medical Sciences, Mashhad, Iran; Department of Pharmaceutical Biotechnology, School of Pharmacy, Mashhad University of Medical Sciences, Mashhad, Iran. Electronic address:
Combination therapy using chemo-photothermal therapy (chemo-PTT) shows great efficacy toward tumor ablation in preclinical studies. Besides, lipopolymersomes as a hybrid nanocarriers, integrate advantages of liposomes and polymersomes in a single platform in order to provide tremendous biocompatibility, biodegradability, noteworthy loading efficacy for both hydrophobic and hydrophilic drugs with adjustable drug release and high stability. In this study, a multipurpose lipopolymersome was fabricated for guided chemotherapy-PTT and NIR-imaging of melanoma.
View Article and Find Full Text PDFLabel-Free Composition Analysis of Supramolecular Polymer-Nanoparticle Hydrogels by Reversed-Phase Liquid Chromatography Coupled with a Charged Aerosol Detector.
Anal Chem
April 2024
Department of Materials Science and Engineering, Stanford University, Stanford, California 94305, United States.
Supramolecular hydrogels formed through polymer-nanoparticle interactions are promising biocompatible materials for translational medicines. This class of hydrogels exhibits shear-thinning behavior and rapid recovery of mechanical properties, providing desirable attributes for formulating sprayable and injectable therapeutics. Characterization of hydrogel composition and loading of encapsulated drugs is critical to achieving the desired rheological behavior as well as tunable and payload release kinetics.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!