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Evaporative crystallization of Poly(ethylene oxide)-b-Poly(L-lactic acid) on water surface
Journal article   Open access   Peer reviewed

Evaporative crystallization of Poly(ethylene oxide)-b-Poly(L-lactic acid) on water surface

Christopher Li, Qian Qian, Shan Mei, Shichen Yu and Carl T Furner
Polymer : the International journal for the Science and Technology of polymers, v 336, 128910
13 Oct 2025
DOI: https://doi.org/10.1016/j.polymer.2025.128910
Featured in Collection :   Research Supported by Drexel Libraries' OA Programs
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https://doi.org/10.1016/j.polymer.2025.128910View
Published, Version of Record (VoR)Open Access via Drexel Libraries Read and Publish Program 2025CC BY-NC V4.0,  Open

Abstract

Polymer crystallization Polymer single crystals Evaporative crystallization Polymer Chemistry
Evaporative crystallization on water surface (ECWS) provides a unique approach to tuning polymer crystallization pathways. Recent studies have shown that poly(l-lactic acid) (PLLA) forms biphasic one-dimensional (1D) and two-dimensional (2D) crystals upon ECWS. In this work, we report on the ECWS behavior of poly(ethylene oxide)-b-(poly(l-lactic acid) (PEO-b-PLLA). Atomic Force Microscopy (AFM) and Transmission Electron Microscopy (TEM) were used to track the structural and morphological evolution of the block copolymer assembly. 1D filaments were exclusively observed, and the formation process was systematically studied. ECWS conditions, such as polymer concentration, evaporation rate, and temperature, were varied to understand the formation mechanism and tune the structure. Rotational flow was introduced to control the 1D filament packing. Quasi-2D liquid crystalline films were obtained.

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