Study on preparation technology of ultrafine biodegradable electrospun PBST nanofibers

doi:10.19491/j.issn.1001-9278.2025.02.007

Abstract

Abstract:

The spinnability of poly（butylene succinate terephthalate）（PBST） in a mono⁃solvent system of dichloromethane （DCM） or in a binary solvent system of chloromethane/N，N⁃dimethylformamide （DMF） was intensively investigated by using a solution electrospinning technique. The effects of polymer spinning solution concentration， feeding rate， and solvent ratio on the diameter of PBST nanofibers during the electrospinning process were also investigated. The diameter of the PBST nanofibers was further evaluated by the addition of a tetrabutylammonium chloride （TBAC） organic salt during the electrospinning process. The assistance effects of TBAC on different concentrations or solvent systems were also studied. The results indicated that the addition of TBAC could greatly elevate the conductivity of the polymer solution， improving its spinnability and consequently reducing the fiber diameter. Meanwhile， the filtration properties of the as⁃prepared PBST nanofibrous materials were also preliminarily explored. The PBST nanofibrous materials with a minimum fiber diameter of 65 nm were prepared by using a 5⁃wt% PBST/（DCM/DMF=7/3） polymeric solution， in which the mass ratio of PBST to TBAC was 4/1. The PBST nanofibrous materials obtained an optimal filtration efficiency of 99.98 % and a filtration resistance of 237 Pa when using an 8⁃wt% PBST/（DCM/DMF=7/3） polymeric solution， in which the mass ratio of PBST to TBAC was 16/1.

Key words: poly（butylene succinate terephthalate） nanofibrous material, solution electrospinning technique, ultrafine nanofiber

CLC Number:

TQ323.4

ZHANG Zheng, LI Fangquan, ZHU Guixiang, GUO Min, WANG Ying. Study on preparation technology of ultrafine biodegradable electrospun PBST nanofibers[J]. China Plastics, 2025, 39(2): 32-39.

Figures/Tables 8

Fig.1. Schematic diagram of the electrospinning device and SEM images of the PBST nanofibers prepared using different polymer solution

样品	5 % PBST/DCM	8 % PBST/DCM	10 % PBST/DCM
黏度	11.0	32.4	66.7

Tab.1. Viscosity of the PBST/DCM polymer solution with different concentrationm

Fig.2. Morphology and fiber diameter statistics of the nanofibrous materials prepared using different polymer solution

Fig.3. Morphology and fiber diameter statistics of the nanofibrous materials prepared using different polymer solution

Fig.4. Morphology and fiber diameter statistics of the nanofibrous materials prepared using different polymer solution and feeding rate

Fig.5. Viscosity and conductivity of different polymer solution and relationship between conductivity of different polymer spinning solutions and diameter of the PBST nanofibers

Fig.6. Air filtration test results of the PBST nanofiber materials with different fiber structure

Fig.7. Morphology and fiber diameter statistics of the PBST nanofiber materials prepared using different polymer solution and feeding rate

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