TY  - JOUR
A1  - Friess, Fabian
A1  - Lendlein, Andreas
A1  - Wischke, Christian
T1  - Size control of shape switchable micronetworks by fast two-step microfluidic templating
T2  - Journal of materials research
N2  - Shape-memory polymer micronetworks (MN) are micrometer-sized objects that can switch their outer shape upon external command.This study aims to scale MN sizes to the low micrometer range at very narrow size distributions. In a two-step microfluidic strategy, the specific design of coaxial class capillary devices allowed stabilizing the thread of the dispersed phase to efficiently produce precursor particles in the tip-streaming regime at rates up to similar to 170 kHz and final sizes down to 4 mu m. In a subsequent melt-based microfluidic photocrosslinking of the methacrylate-functionalized oligo(epsilon-caprolactone) precursor material, MN could be produced without particle aggregation. A comprehensive analysis of MN properties illustrated successful crosslinking, semi-crystalline morphology, and a shape-switching functionality for all investigated MN sizes (4, 6, 9, 12, 22 mu m). Such functional micronetworks tailored to and below the dimension of cells can enable future applications in technology and medicine like controlling cell interaction.
Y1  - 2021
UR  - https://publishup.uni-potsdam.de/frontdoor/index/index/docId/61509
SN  - 0884-2914
SN  - 2044-5326
VL  - 36
IS  - 16
SP  - 3248
EP  - 3257
PB  - Springer
CY  - Berlin
ER  -