Direct Visualization of Nano and Microscale Polymer Morphologies in As-Prepared and Dialyzed Polyampholyte Hydrogels by Electron Microscopy Techniques

Li, Xinda; Charaya, Hemant; Tran, Thuy Nguyen Thanh; Lee, Byeongdu; cho, Jae-young; Chung, Hyun-Joong

doi:10.1557/mrc.2018.149

Direct Visualization of Nano and Microscale Polymer Morphologies in As-Prepared and Dialyzed Polyampholyte Hydrogels by Electron Microscopy Techniques

Journal Article · 01 September 2018 · MRS Communications

DOI:https://doi.org/10.1557/mrc.2018.149· OSTI ID:1593120

Li, Xinda; Charaya, Hemant; Tran, Thuy Nguyen Thanh; Lee, Byeongdu; cho, Jae-young; Chung, Hyun-Joong

The structure of polymer networks in hydrogels determines the properties. In this study, we investigated the structure of a charge-balanced polyampholyte, poly(4-vinylbenzenesulfonate-co-[3-(methacryloylamino) propyl] trimethylammonium chloride). From as-prepared samples, nanoscale globules were visualized in polyampholyte hydrogels for the first time. The impact of dialyses processes on polymer structures were also studied. In deionized water, salt ions are leached out, thus polymer chains undergo zipping process to form cellular structure with micrometer-thick polymer walls that allow mechanical toughness to the hydrogel. Samples dialyzed in 6 M potassium hydroxide solution did not show such cellular structure, as in the case of as-prepared samples.

Research Organization:: Argonne National Lab. (ANL), Argonne, IL (United States)

Sponsoring Organization:: Natural Sciences and Engineering Research Council of Canada (NSERC); USDOE Office of Science - Office of Basic Energy Sciences - Scientific User Facilities Division

DOE Contract Number:: AC02-06CH11357

OSTI ID:: 1593120

Journal Information:: MRS Communications, Vol. 8, Issue 3

Country of Publication:: United States

Language:: English

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