Superhydrophobic, durable and electrically conductive polymer

nanofiber composite for multifunctional sensing applications

Jiefeng Gao*a,b, Ling Wang a, Zheng Guo a, Bei Li a, Hao Wang a, Junchen Luo a,

Xuewu Huang a, Huaiguo Xue a a School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou,

Jiangsu, 225002, Chinab State Key Laboratory of Polymer Materials Engineering, Sichuan University,

Chengdu, Sichuan 610065, China

*Corresponding authors: jfgao@yzu.edu.cn;

Fig. S1 (a) Photograph of the PU/SEBS nanofiber membrane. (b) SEM image of PU/SEBS nanofiber membrane.

Fig. S2 SEM images of ACNT decorated blend polymer nanofibers with different ultrasonication time (a) 1 min, (b) 5min, (c) 10 min and (d) 20min.

Fig. S3 The normalized conductivity variation of the nanofiber composite (PU/ACNTs) experiencing different times of sand abrasion.

Fig. S4 TGA curves of the PBNF and PBNF/ACNT-10 membrane.

Fig. S5 TEM image of BPNF/ACNTs nanofiber.

Fig. S6 SEM images of BPNF/ACNT-10 experiencing MTS hydrolysis for different time at a controlled MTS concentration of 1 wt%, (a) 15 min, (b) 30 min, (c) 45 min and (d) 60 min.

Fig. S7 Photo of the water droplets including the acid, alkaline and salt solution on the membrane surface. Cyclic vapor sensing behaviors of BPNF/ACNTs-10 and BPNF/ACNTs-10/P-30 against water vapor.

Fig. S8 The variation of conductivity and contact angle of the nanofiber composite (PBNF/ACNTs/Polysiloxane) with the sand abrasion times.

Fig. S9 The toluene vapor sensing performance of the nanofiber composite after immersion in the acid solution for 8h.

Fig. S10 Strain-sensing behavior of the nanofiber composite under a 50 mm/min strain rates with different strain.

Table S1 Comparative chemical vapor sensing behaviors based on the CPCs

MaterialsVapor

concentrationSolvent

Immersion time in organic vapors

(s)

Responsivity(R/R0)

Ref.

CNTs/RF/PLA

Saturated vaporPolar vapors

(dichloromethane)150 3200

[1]Saturated vapor

Nonpolar vapor(cyclohexane,

tetrachloromethane)150 1.01-1.04

MWCNTs@PPY/HTBN PU 500 ppm Chloroform 120 1.055 [2]

MWCNTs/PLA 1000 ppm Chloroform - 1.048 ~ 1.056 [3]

CNT–celluloseSaturated vapor

Polar vapors(methanol, ethanol, acetone and THF)

100 1.4-1.45[4]

Saturated vaporNonpolar vapor

(n-hexane)100 1.125

SBS/CNT10%

Polar vapors(acetone)

100 3.56[5]

10%Nonpolar vapor(cyclohexane)

100 1.19

Our work

Saturated vaporPolar vapors

(acetone)60 2.8

Saturated vaporNonpolar vapor

(heptane)60 1.1

1 ppm Toluene 270 2.3 × 10-2

Note that the 10% acetone in Ref. 5 is diluted using a bubbler-based sensor measurement system [6].

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