Dual-stage thermosetting photopolymers for advanced manufacturing
Dual-stage thermosetting photopolymers for advanced manufacturing
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用于先进制造的双级热固性光聚合物
DOI：
10.1016/j.cej.2021.128466
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发表时间：
2021-05
影响因子：
15.1
通讯作者：
Qi Ge
中科院分区：
文献类型：
--
作者：
Biao Zhang;Ahmad Serjouei;Yuan-Fang Zhang;Jumiati Wu;Honggeng Li;Dong Wang;Hong Yee Low;Qi Ge
我们报道了一种基于连续紫外（UV）触发自由基聚合和热活化醚化的双阶段光交联聚合物网络，适用于可定制和可编程的高分辨率结构的制造。第一阶段涉及单体和交联剂的光引发聚合以获得中间体聚合物网络。因此，可以通过使用基于UV的先进制造技术来制造复杂的二维（2D）和微尺度三维（3D）结构。然后，这些复杂的结构可以容易地编程为其他所需的，永久的形状，在第二阶段，通过热触发醚化，这导致一个高度交联的，强大的聚合物网络。中间网络（阶段I）的特征在于具有342至1146 MPa的杨氏模量和52 °C至83 °C的玻璃化转变温度，这取决于交联剂的浓度。相同的材料在随后的加热过程（阶段II）后达到67 °C至~105 °C的玻璃化转变温度和高达1607 MPa的杨氏模量。最初3D打印的2D结构可以进一步编程为刚性的，永久的2.5/3D结构。本征亲水性双级交联光致聚合物通过软光刻制备的微图案显示出超疏水性，并且随后可以模塑成具有不同曲率的实际应用。
We report a dual-stage photocrosslinked polymer network based on sequential ultraviolet (UV)-triggered radical polymerization and thermally activated etherification, applicable to the fabrication of tailorable and programmable high-resolution structures. The first stage involves photoinitiated polymerization of monomer and crosslinker to obtain an intermediate polymer network. As such, sophisticated two-dimensional (2D) and micro-scale three-dimensional (3D) structures can be made by using UV-based advanced manufacturing technologies. These complex structures can then be readily programmed into other desired, permanent shapes, in the second stage, via thermally triggered etherification which results in a highly crosslinked, robust polymer network. The intermediate network (Stage I) is characterized to have a Young’s modulus ranging from 342 to 1146 MPa and a glass transition temperature from 52 °C to 83 °C, depending on the concentration of crosslinker. The same material attains a glass transition temperature ranging from 67 °C to ~105 °C and a Young’s modulus of up to 1607 MPa after the subsequent heating process (Stage II). Originally 3D printed 2D structures can be further programmed into rigid, permanent 2.5/3D ones. Micropatterns fabricated from intrinsically hydrophilic dual-stage crosslinked photopolymers through soft lithography show superhydrophobicity, and can subsequently be molded with different curvatures for practical applications.
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影响因子：
4.6
作者：
Ge Q;Sakhaei AH;Lee H;Dunn CK;Fang NX;Dunn ML
通讯作者：
Dunn ML
影响因子：
4.2
作者：
Cui, Yanyan;Yang, Junlai;Su, Jiahui
通讯作者：
Su, Jiahui
影响因子：
--
作者：
K. Anseth;S. Newman;C. Bowman
通讯作者：
K. Anseth;S. Newman;C. Bowman
影响因子：
29.4
作者：
Kloxin, Christopher J.;Scott, Timothy F.;Bowman, Christopher N.
通讯作者：
Bowman, Christopher N.
影响因子：
7.015
作者：
Retailleau, Matthieu;Ibrahim, Ahmad;Le Nouen, Didier
通讯作者：
Le Nouen, Didier