Reconfigurable surface patterns on covalent adaptive network polymers using nanoimprint lithography
Reconfigurable surface patterns on covalent adaptive network polymers using nanoimprint lithography
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DOI：
10.1016/j.polymer.2014.09.024
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发表时间：
2014-11-05
期刊：
影响因子：
4.6
通讯作者：
Ding, Yifu
中科院分区：
文献类型：
--
作者：
Cox, Lewis M.;Li, Zhengwei;Ding, Yifu
共价自适应网络是一种能够通过重新配置其网络拓扑结构来缓解内部应力的交联型聚合物。具体地说，可逆加成-断裂链转移(RAFT)是一种通过交换共价键来缓解内应力的机制。虽然这种体系中的应力松弛已经在块体材料中进行了研究，但在这里，我们表征了基于RAFT的罐头通过纳米压印光刻直接进行亚微米表面拓扑的机械图案化的能力。研究了不同的印迹参数和材料性质对可实现的表面图案几何形状的影响，并首次展示了交联型聚合物的永久亚微米表面重构，其特征比以前发表的任何一种聚合物都要小几个数量级。(C)2014爱思唯尔有限公司。保留所有权利。
Covalent adaptable networks (CANs) are cross-linked polymers capable of relieving internal stresses by reconfiguring their network topology. Specifically, reversible addition-fragmentation chain transfer (RAFT) is a mechanism by which covalent bonds are exchanged to relieve internal stresses. While stress relaxation in such systems has been studied in bulk materials, here, we characterize the ability of RAFT-based CANs to undergo direct mechano-patterning of sub-micron surface topologies via nanoimprint lithography. The effects that different imprinting parameters and material properties have on the achievable surface pattern geometries are investigated, and we provide the first demonstration of permanent sub-micron surface reconfiguration on crosslinked polymers, which exhibit features orders of magnitude smaller than any previously published. (C) 2014 Elsevier Ltd. All rights reserved.