Double-stretching as an effective and generalizable strategy towards thinner nanofibers in solution blow spinning  

作　　者：Baopu Zhang Ziwei Li Zekun Cheng Lei Li Chong Yang Haiyang Wang Hui Wu 

机构地区：[1]State Key Laboratory of Ceramics and Fine Processing,School of Materials Science and Engineering,Tsinghua University,Beijing 100084,China [2]Department of Chemical Engineering,Massachusetts Institute of Technology,Cambridge 02139,USA

出　　处：《Nano Research》2023年第4期5709-5714,共6页纳米研究（英文版）

基　　金：supported by the Basic Science Center Program of the National Natural Science Foundation of China(NSFC)(No.51788104);Beijing Natural Science Foundation(No.JQ19005).

摘　　要：Solution blow spinning(SBS)applies high-speed airflow to prepare fibers by generating a strong stretching force.It has the advantages of scalable production,tailorable morphologies,and wide applicability.Yet,the SBS strategy can hardly prepare fibers down to the sub-100 nanometers,which limits its performance in demanding applications.Herein,we overcome the limitation of SBS by introducing a second airflow.This novel strategy is termed double-stretching SBS(DS-SBS)because an extra stretching force is exerted on the fiber when it converges with the second airflow.Polyamide6 nanofibers with an average diameter of 80 nm are successfully prepared with the DS-SBS strategy,while the SBS strategy could only prepare submicron fibers with an average diameter of 120 nm.Further,the generality of the DS-SBS strategy to reduce fiber diameter is verified on numerous solute-solvent pairs.

关 键 词：NANOFIBERS solution blow spinning double-stretching computational fluid dynamics 

分 类 号：TB383[一般工业技术—材料科学与工程]