Application of PEO-PPO-PEO Triblock Copolymers in Synthesis of Silica and Organosilica Nanomaterials

<p>In this dissertation, the research work focused on the application of Pluronic triblock copolymers, poly(ethylene oxide)-poly(propylene oxide)-poly(ethylene oxide) (PEO-PPO-PEO), in the synthesis of mesoporous material, such as double-helical silica nanotube structures as well as bridged organosilica nanotubes by using swollen micelles of Pluronic surfactants and their mixtures. Chapter 1 introduced the background and several important mesoporous structures, and the relevant topics in this dissertation, such as, silica nanotubes, helical silica nanotubes, silica vesicles and organosilica nanotubes. Chapter 2, continued research works from earlier published paper (ACS Nano 2021, 15, 1016-1029), discussed static treatment and stirring effect on the formation of double-helical silica nanotube structures. Chapter 3 discussed the double helical structures surface-modified by amino group by using 3-aminopropyltriethoxysilane (APTES) as co-precursor. Organosilica nanotubes were discussed from Chapter 4 to Chapter 6. Chapter 4 described synthesis of ethylene-bridged organosilica nanotubes using single Pluronic surfactant P104, while Chapter 5 discussed the synthesis of large and tunable ethylene-bridged organosilica nanotubes using mixed Pluronic surfactants (F108 and P104). In Chapter 6, the synthesis of other bridged organosilica nanotubes using mixed surfactants templating systems (F108 / P104). Chapter 7 provides a summary of the work.</p>

Name thesis:degree_name

Doctor of Philosophy

Level thesis:degree_level

Doctoral

Discipline thesis:degree_discipline

Chemistry

Grantor

The Graduate School and University Center of The City University of New York

Year dc:date.available

2022

Author dc:creator

• Zhang, Shu

Advisor dc:contributor.advisor

• Michal Kruk

Committee members dc:contributor.committeemember

• Shuiqin Zhou
• Robert Messinger

• Materials Chemistry
• Polymer Chemistry
• triblock copolymer
• nanomaterial
• mesoporous material
• Pluronic surfactant
• silica
• organosilica

Repository record dc:identifier

https://academicworks.cuny.edu/gc_etds/5036

OAI identifier oai:identifier

oai:academicworks.cuny.edu:gc_etds-6113