Photothermal Welding, Melting, and Patterned Expansion of Nonwoven Mats of Polymer Nanofibers for Biomedical and Printing Applications
Photothermal Welding, Melting, and Patterned Expansion of Nonwoven Mats of Polymer Nanofibers for Biomedical and Printing Applications
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DOI：
10.1002/anie.201907876
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发表时间：
2019-09-20
影响因子：
16.6
通讯作者：
Xia, Younan
中科院分区：
文献类型：
--
作者：
Wu, Tong;Li, Haoxuan;Xia, Younan
我们报道了一种简单的方法，通过引入近红外（NIR）染料，如吲哚菁绿色的光热焊接的非织造垫的电纺纳米纤维。通过利用染料的强光热效应，纳米纤维可以容易地在它们的交叉点处焊接或甚至过度焊接（即，熔融和/或熔合在一起），以在暴露于NIR激光时将多孔垫转变成固体膜。虽然在交叉点处的焊接极大地提高了纳米纤维的非织造垫的机械强度，但是纳米纤维的熔化和熔合可以用于制造用于激光写入或打印的新型光热纸，而不需要化学品或调色剂颗粒。通过使用光掩模，我们可以将光热焊接与气体发泡技术相结合，以图案化非织造垫，然后将其扩展成具有明确结构的3D支架。该方法可以应用于聚合物和染料的不同组合，如果它们可以共溶解在合适的溶剂中用于静电纺丝。
We report a simple method for the photothermal welding of nonwoven mats of electrospun nanofibers by introducing a near-infrared (NIR) dye such as indocyanine green. By leveraging the strong photothermal effect of the dye, the nanofibers can be readily welded at their cross points or even over-welded (i.e., melted and/or fused together) to transform the porous mat into a solid film upon exposure to a NIR laser. While welding at the cross points greatly improves the mechanical strength of a nonwoven mat of nanofibers, melting and fusion of the nanofibers can be employed to fabricate a novel class of photothermal papers for laser writing or printing without chemicals or toner particles. By using a photomask, we can integrate photothermal welding with the gas foaming technique to pattern and then expand nonwoven mats into 3D scaffolds with well-defined structures. This method can be applied to different combinations of polymers and dyes, if they can be co-dissolved in a suitable solvent for electrospinning.