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溶液吹塑聚酰胺酸纳米纤维的制备及其亚胺化制备聚酰亚胺纳米纤维毡

Preparation of Solution Blown Polyamic Acid Nanofibers and Their Imidization into Polyimide Nanofiber Mats.

作者信息

Li Jing, Song Guocheng, Yu Junrong, Wang Yan, Zhu Jing, Hu Zuming

机构信息

State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials, Science and Engineering, Donghua University, Shanghai 201620, China.

出版信息

Nanomaterials (Basel). 2017 Nov 17;7(11):395. doi: 10.3390/nano7110395.

DOI:10.3390/nano7110395
PMID:29149049
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC5707612/
Abstract

Solution blow spinning (SBS) is an innovative process for spinning micro/nanofibers. In this paper, polyamic acid (PAA) nanofibers were fabricated via a SBS apparatus and then imidized into polyimide (PI) nanofibers via thermal process. The morphology and diameter distributions of PAA nanofibers were determined by scanning electron microscope (SEM) and Image Tool software, the processing parameters, including PAA concentration, solution feeding rate, gas pressure, nozzle size, and receiving distance were investigated in details. The fourier transform infrared spectroscopy (FTIR) was used to characterize the chemical changes in the nanofibers after thermal imidization. The results showed that the solution concentration exhibited a notable correlation with spinnability, and the formation of bead defects in PAA nanofibers. Solution feeding rate, gas pressure, nozzle size, and receiving distance affected nanofiber production efficiency and diameter distribution. The average diameters of fibers produced ranged from 129.6 to 197.7 nm by varying SBS parameters. Precisely, PAA nanofibers with good morphology were obtained and the average diameter of nanofibers was 178.2 nm with optimum process parameter. After thermal imidization, the PI nanofibers exhibited obvious adhesion morphology among interconnected fibers, with an increased average diameter of 209.1 nm. The tensile strength of resultant PI nanofiber mat was 12.95 MPa.

摘要

溶液吹纺（SBS）是一种用于纺制微/纳米纤维的创新工艺。在本文中，通过SBS设备制备了聚酰胺酸（PAA）纳米纤维，然后通过热工艺将其亚胺化制成聚酰亚胺（PI）纳米纤维。通过扫描电子显微镜（SEM）和图像工具软件确定了PAA纳米纤维的形态和直径分布，详细研究了包括PAA浓度、溶液进料速率、气压、喷嘴尺寸和接收距离在内的工艺参数。利用傅里叶变换红外光谱（FTIR）对热亚胺化后纳米纤维的化学变化进行了表征。结果表明，溶液浓度与可纺性以及PAA纳米纤维中珠状缺陷的形成具有显著相关性。溶液进料速率、气压、喷嘴尺寸和接收距离影响纳米纤维的生产效率和直径分布。通过改变SBS参数，所生产纤维的平均直径范围为129.6至197.7nm。确切地说，在最佳工艺参数下获得了形态良好的PAA纳米纤维，纳米纤维的平均直径为178.2nm。热亚胺化后，PI纳米纤维在相互连接的纤维之间呈现出明显的粘附形态，平均直径增加到209.1nm。所得PI纳米纤维毡的拉伸强度为12.95MPa。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/08c9/5707612/c150b415c35c/nanomaterials-07-00395-g010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/08c9/5707612/d8d80a5e9a0c/nanomaterials-07-00395-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/08c9/5707612/d37b34b4e2d3/nanomaterials-07-00395-g002a.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/08c9/5707612/5ecda0dedc11/nanomaterials-07-00395-g003a.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/08c9/5707612/5fc3065c8d25/nanomaterials-07-00395-g004a.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/08c9/5707612/8294b1d70640/nanomaterials-07-00395-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/08c9/5707612/5258a12b5ff7/nanomaterials-07-00395-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/08c9/5707612/d647b510a963/nanomaterials-07-00395-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/08c9/5707612/12ea38a8ae46/nanomaterials-07-00395-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/08c9/5707612/c01ab6410baa/nanomaterials-07-00395-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/08c9/5707612/c150b415c35c/nanomaterials-07-00395-g010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/08c9/5707612/d8d80a5e9a0c/nanomaterials-07-00395-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/08c9/5707612/d37b34b4e2d3/nanomaterials-07-00395-g002a.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/08c9/5707612/5ecda0dedc11/nanomaterials-07-00395-g003a.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/08c9/5707612/5fc3065c8d25/nanomaterials-07-00395-g004a.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/08c9/5707612/8294b1d70640/nanomaterials-07-00395-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/08c9/5707612/5258a12b5ff7/nanomaterials-07-00395-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/08c9/5707612/d647b510a963/nanomaterials-07-00395-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/08c9/5707612/12ea38a8ae46/nanomaterials-07-00395-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/08c9/5707612/c01ab6410baa/nanomaterials-07-00395-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/08c9/5707612/c150b415c35c/nanomaterials-07-00395-g010.jpg

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