Z02-3720
Electrical Conductivity and Linear Rheology of Multi walled Carbon Nanotube/Acrylonitrile
Butadiene Styrene Polymer Nanocomposites Prepared by Melt Mixing and Solution Casting
112121
T. Kobayashi , S. Takeda , A. Khosla , M. Sugimoto , H. Furukawa , S. K. Sukumaran
1Graduate School of Organic Materials Science 2Graduate School of Science and Engineering
http://ckpmac7.yz.yamagata-u.ac.jp/

Yamagata University, Yonezawa, Japan

Introduction

CF-1

10ABS/CF1D-310 / Scm-1

Conductive polymer composite**TORAY HP

Currently 100~101

10-7104ABS/Graphene
2D-710(5)Poorly*NTT AT HP-910

Length 6 mm 10-13
Diameter 7 μm 10-15

Circuits
Sensors

ABS/CB3D(4)*Japan Chemical
Fiber Association HP 10-11

Antistatic
Electromagnetic shielding

Insulator

10-5Effect of dispersion
on physical properties (7)

(3)

Size
180 μmComparisonof filler
0.0

2.0
4.0
6.0
8.0
Weight Fraction w / %Carbon nanotube

10CB

Highly(1)

Conductive filler• Carbon Black (CB)• Graphene• Carbon fiber (CF)• Carbon nanotube*Mitubishi Chemical HP

Particle size
12 nm

*Nanocyl HP(1) S.W. Kwok et al., Applied
Materials Today, 9, 167 (2017)

Length 1.5 μm
Diameter 9.5 nm

Comparison offiller amount(6)Melt Mixing

Ultimate goal: For 3D printing
Multi-walled carbon nanotubes

Melt mixing
Twin screw melt mixerSonication
10 min𝜎 = 𝜎0  − 𝑐𝜎~(-0.17)
110R

010-3

10-1

 / Scm

 / Scm

-1

1.84}

1.85

10-4-1-2

10

1.84
Solution cast
400 W-3

10-5

10-4

10-6

0.0

1.0

R : 4.8 nm-2-1

10102.0

3.0/%c / %
0.113
0.1700-c

4.0

5.0Melt mixing
Solution casting(8)(2) Linear rheology

6107104

1.36%

100.339%1010320.226%

Solution Meltcast mixing

0.113%
Neat ABS

10101010-3

10-2-101010-1 / rad s

Neat ABS
0.113 %
0.226 %
0.339 %
1.36 %

10110

2G'(0.0215) ~ (-0.04)

6

Solution cast 400 W
G'(0.0215)~(-0.06)1.90

10101010

54G'(0.0215)/Pa10

2.30

G'(0.0215) / Pa

G' () / Pa

Melt mixing
51071061051041031023

Solution cast
400 W
1.902.30
Melt mixing-11020.0

-100110c1.0

2.0

3.0
/%(8) S. K. Sukumaran et al., Journal of The Electrochemical Society, 166 (9), B3091 (2019).

4.0Solution cast400 W

100Lave / μm
0.40.9Power-law fitting(  = 0.0215 rad s-1)

Frequency sweep at 200℃
104 32𝜋𝑅 + 𝜋𝑅 𝐿
3𝑐𝑡 =16𝜋𝑅3 + 8𝜋𝑅 2 𝐿 + 𝜋𝑅𝐿210

1.50.5L

Melt mixing
1.85

1010{Filler length
distribution2P(l)/l / mSolution cast 400 W𝑡𝜎-11010

Frequency sweep10-2 ~ 102 rad*s-1
=1Melt mixing : Conductivity
 : Filler volume fraction
c : Percolation thresholdt : Critical exponent

2-210 minConductivity percolation(1) Conductivity(8)10Drying about
12 hours
Sonication

2.5

Results and Discussion-1

1.Conductivity
Digital multimeter 2110

(BRANSON Ultrasonics Co.)
(Keithley)
ABS
MWCNT
2.Linear rheology
dissolvedin
Chloroform
dichloromethane MCR 301 (Anton Paar)

200 ℃ 50 rpm 10 min

~(-0.113)(3) Measurement

Solution casting
Ultrasonic homogenizer

MWCNT (Nanocyl NC7000TM)
Average length
1.5 μmAverage diameter 9.5 nm

10(7) L-C Tang et al., CARBON, 60, 16 (2013)(2) Sample preparation(Toyo seiki seisaku-sho Co.)

0Poor dispersion (?)

Electrical Conductivity: 4 point probeLinear Rheology: oscillatory shear(2) Al-Saleh et al.Journal of Polymer Science Part B : Polymer Physics, 50, 1356 (2012). (3) X. Lianget al., Materials Letters, 43, 144 (2000). (4) Chong et al. ACS Applied Materials & Interfaces, 6,12252 (2014). (5) Al-saleh et al., Carbon, 60, 146 (2013). (6) D.P. Schmitz et al., Materials Today
Communications 15, 70 (2018).

ABS (Beijing Tiertime Technology Co., Ltd.)

Melt mixing

Fast, Scalable

Conductive filler with high aspect ratio Melt mixing vs Solution casting(1) Sample

10Disadvantage

Solution Casting Good dispersion Solvent disposal

High conductivity: for printing a wide variety ofelectrical and functional components, devices etc.
High processability: for printing using
commercially available conventional 3D printers.

1Advantage

5.0

0.5

ct / %
1.1
0.60

11.5l / m2

2.5

3CV ≡ s/Lave
0.50
0.45s
0.27
0.40

Electrical Conductivity: Melt mixing using
an internal batch mixer is at least as goodas solution casting!
→ No special mixing processes or protocols
are required.
The obtained conductivity values are close
to the highest values reported in theliterature.
→ No modification or treatment of the filler
surface is required.
Percolation: The dependence of theelectrical conductivity and the storage
modulus on the filler content can be
described by power-laws.
→ The conductivity exponent is close totheory (assuming random filler distribution).
www.postersessi on.com

Conductivity(S/cm)

Graphene

ABS/CNT 1D (2)www.postersession.com