A Facile Synthesis of Dynamic, Shape-Changing Polymer Particles

reportActive / Technical Report | Accession Number: ADA616610 | Open PDF

Abstract:

We herein report a new facile strategy to ellipsoidal block copolymer nanoparticles that exhibit a pH-triggered anistropic swelling profile. In a first step, elongated particles with an axially stacked lamellae structure are selectively prepared by utilizing functional surfactants to control the phase separation of symmetric polystyrene-b-poly2-vinylpyridine PS-b-P2VP in dispersed droplets. In a second step, the dynamic shape change is realized by cross-linking the P2VP domains, thereby connecting glassy PS discs with pH-sensitive hydrogel actuators.

Author(s):
Klinger, Daniel ; Wang, Cynthia X. ; Connal, Luke A. ; Audus, Debra J. ; Jang, Se G. ; Kraemer, Stephan ; Killops, Kato L. ; Fredrickson, Glenn H. ; Kramer, Edward J. ; Hawker, Craig J.
Author Organization(s):
CALIFORNIA UNIV SANTA BARBARA
Descriptive Note:
Journal article
Supplementary Note:
Published in Angewandte Chemie International Edition, v53 n27 p7018-7022, 2 April 2014.
Pagination:
0008

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release
Distribution Statement:
Approved For Public Release; Distribution Is Unlimited.

RECORD

Collection: TR
Identifying Numbers
Report Number(s):
ARO-55012-LS-ICB.681
Contract/Grant Number(s):
W911NF-09-D-0001
Monitor Series:
55012-LS-ICB.681, ARO
 Subject Terms
Joint Capability Areas:
JCA_6.1.3_Switching and Routing; JCA_6_Net Centric; JCA_5_Command and Control; JCA_6.1_Information Transport; JCA_1_Force Support; JCA_5.3_Planning; JCA_3.2_Engagement; JCA_3_Force Application; JCA_1.2_Force Preparation; JCA_6.4.1_Secure Information Exchange; JCA_8_Building Partnerships
Modernization Areas:
Biotechnology
Communities of Interest:
Biomedical
Descriptor(s):
*BLOCK COPOLYMERS, *NANOPARTICLES, *SURFACE CHEMISTRY, ANISOTROPY, CHEMICAL ENGINEERING, CROSSLINKING(CHEMISTRY), GELS, LITHOGRAPHY, MOLECULAR WEIGHT, MORPHOLOGY, PH FACTOR, SELF ASSEMBLED MONOLAYERS, SEPARATION, SOLUTIONS(MIXTURES), STIMULI, SURFACE ACTIVE SUBSTANCES, SYNTHESIS(CHEMISTRY)
Field(s)/Group(s):
Polymer Chemistry
Keyword(s):
MICROGELS, SHAPE ANISOTROPY, STIMULI RESPONSIVE MATERIALS, PHASE SEPARATION, PE611104A
Report Date:
2014 Apr 02
Creation Date:
2015 Jun 10