Nonionic Amphiphilic Linear Dendritic Block Copolymers.
Solvent-Induced Self-Assembly and Morphology Tuning
Posted on 2019-07-17 - 18:36
In
this article, we report the solution self-assembly of a series
of amphiphilic linear–dendritic block copolymers (LDBCs), which
are composed of hydrophilic dendritic poly(ether-ester), PEE, blocks
based on 2,2-bis(hydroxymethyl)propionic acid and hydrophobic linear
poly(styrene), PSt, blocks. The investigated LDBCs have narrow dispersity
with three PEE generations (1–3) and a broad range of PSt molecular
masses and are produced by dendron-initiated atom transfer radical
polymerization of styrene followed by deprotection of the peripheral
dendron hydroxyl groups. The solution self-assembly of the copolymers
is performed by slowly adding water to the polymer solution in tetrahydrofuran
(THF) as the common solvent for both blocks of the copolymers. The
morphologies of the supramolecular assemblies are preserved either
by diluting their dispersion by excess of water or by THF evaporation.
It is found that the micellar morphology (sphere, wormlike, and/or
vesicle) depends on the hydrophilic block fraction (FPEE) and dendron generation. The self-assembly morphology
transition from vesicle to wormlike micelle or sphere is achieved
by switching the common solvent from THF to dimethylformamide. Interestingly,
LG2-PSt 18k forms a bicontinuous phase, while LG3-PSt 68k forms onion-like
aggregates with acetone as the common solvent. Palladium complexation
within the dendron block leads to formation of cubosomes and other
structures with morphology of higher order.
CITE THIS COLLECTION
DataCiteDataCite
3 Biotech3 Biotech
3D Printing in Medicine3D Printing in Medicine
3D Research3D Research
3D-Printed Materials and Systems3D-Printed Materials and Systems
4OR4OR
AAPG BulletinAAPG Bulletin
AAPS OpenAAPS Open
AAPS PharmSciTechAAPS PharmSciTech
Abhandlungen aus dem Mathematischen Seminar der Universität HamburgAbhandlungen aus dem Mathematischen Seminar der Universität Hamburg
ABI Technik (German)ABI Technik (German)
Academic MedicineAcademic Medicine
Academic PediatricsAcademic Pediatrics
Academic PsychiatryAcademic Psychiatry
Academic QuestionsAcademic Questions
Academy of Management DiscoveriesAcademy of Management Discoveries
Academy of Management JournalAcademy of Management Journal
Academy of Management Learning and EducationAcademy of Management Learning and Education
Academy of Management PerspectivesAcademy of Management Perspectives
Academy of Management ProceedingsAcademy of Management Proceedings
Academy of Management ReviewAcademy of Management Review
Liu, Xin; Gitsov, Ivan (2019). Nonionic Amphiphilic Linear Dendritic Block Copolymers.
Solvent-Induced Self-Assembly and Morphology Tuning. ACS Publications. Collection. https://doi.org/10.1021/acs.macromol.9b01023