Title: Continuous Flow Fabrication of Block Copolymer-Grafted Silica Micro-Particles in Environmentally Friendly Water/Ethanol Media

Journal Article · · Macromolecular Materials and Engineering
 [1]; ORCiD logo [2];  [1]; ORCiD logo [1]
  1. Case Western Reserve Univ., Cleveland, OH (United States). Dept. of Macromolecular Science and Engineering
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Chemical Sciences Division

Polymer-grafted inorganic particles (PGIPs) are attractive building blocks for numerous chemical and material applications. Surface-initiated controlled radical polymerization (SI-CRP) is the most feasible method to fabricate PGIPs. However, a conventional in-batch reaction still suffers from several disadvantages, including time-consuming purification processes, low grafting efficiency, and possible gelation problems. Herein, a facile method is demonstrated to synthesize block copolymer–grafted inorganic particles, that is, poly(poly(ethylene glycol) methyl ether methacrylate) (PPEGMEMA)-b-poly(N-isopropylacrylamide) (PNIPAM)–grafted silica micro-particles using continuous flow chemistry in an environmentally friendly aqueous media. Immobilizing the chain transfer agent and subsequent SI-CRP can be accomplished sequentially in a continuous flow system, avoiding multi-step purification processes in between. The chain length (MW) of the grafted polymers is tunable by adjusting the flow time or monomer concentration, and the narrower molar mass dispersity (Ð < 1.4) of the grafted polymers reveals the uniform polymer chains on the particles. Moreover, compared with the in-batch reaction at the same condition, the continuous system also suppresses possible gelation problems.

Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
National Science Foundation (NSF); USDOE; USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Grant/Contract Number:
AC05-00OR22725
OSTI ID:
1484979
Journal Information:
Macromolecular Materials and Engineering, Journal Name: Macromolecular Materials and Engineering Journal Issue: 2 Vol. 304; ISSN 1438-7492
Publisher:
WileyCopyright Statement
Country of Publication:
United States
Language:
English

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