Preparation and performance of electrospun polyimide/multi⁃wall carbon nanotubes hybrid nanofibers

doi:10.19491/j.issn.1001-9278.2023.12.004

Abstract

Abstract:

Polyimide （PI）/multi⁃wall carbon nanotubes （MWCNTs） hybrid nanofibers were prepared through a one⁃step electrospinning technology using P84 staple fiber as a matrix. The resultant nanofibers exhibited a minimum nanoscale fiber diameter of （196.61±108.56） nm and a hierarchical porous structure. FTIR spectroscopic analysis indicated that the as⁃prepared nanofibers presented all the characteristic absorption bonds of the original P84 staple fiber. However， the as⁃prepared nanofibers show lower crystallinity and a lower decomposition temperature （590 ℃） than those of the original P84 staple fibers （620 ℃）. With the addition of MWCNTs， there is no influence on the chemical structure and thermal stability of the PI nanofibers. Nevertheless， the diameter of the hybrid nanofibers tended to decrease， and their crystallinity and mechanical strength increased compared to pure PI nanofibers. Notably， compared to pure PI nanofibers， the tensile stress of the hybrid nanofibers increases by 65 % with the addition of 0.5 wt% MWCNTs.

Key words: electrospinning, polyimide, multi?wall corban nanotube, hybrid nanofiber

CLC Number:

TQ323.7

WANG Rongrong, JIANG Tao, SUN Shaoyang, ZHOU Zhou, WANG Xiang, SHEN Ying, XING Jian. Preparation and performance of electrospun polyimide/multi⁃wall carbon nanotubes hybrid nanofibers[J]. China Plastics, 2023, 37(12): 23-28.

Figures/Tables 7

Fig. 1. Morphology and fiber diameter distribution of hybrid nanofiber mats

Fig.2. FTIR （a） and XRD （b） curves of nanofiber mats

Fig. 3. DSC （a）， TG （b） and DTG （c） curves of hybrid nanofiber mats

Fig. 4. Tensile stress⁃strain （a） and Young’s modulus （b） of hybrid nanofiber mats

Fig.5. Water contact angle of nanofiber mats

Fig.6. Pore size and its distribution of PI needle⁃punched nonwoven （a） and PI/MWCNTs nanofibers membrane filters （b）

样品	过滤效率/%						阻力/Pa	品质因数
样品	≥0.3 μm	≥0.5 μm	≥1.0 μm	≥3.0 μm	≥5.0 μm	≥10.0 μm	阻力/Pa	品质因数
基材	2.19	3.78	0	34.94	25	45	3.2	0.012
PI/MWCNTs纳米纤维覆膜滤料	99.36	99.69	100	100	100	100	141	0.041

Tab.1. Filtration performance of PI/MWCNTs nanofiber membrane composite filter

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