https://orcid.org/0000-0002-9772-4800
Abstract
Covalent functionalization of multi-walled carbon nanotubes (MWCNTs) were obtained through acidification, γ-Methacryloxypropyl trimethoxy silane (KH-570) treatment, and free radical polymerization using methyl allyl polyethenoxy ether (HPEG). Fourier-transformed infrared spectroscope was employed to determine the composition and structural changes of MWCNTs after modification. The dispersion of MWCNTs modified by HPEG in water at pH∼13 was determined by UV-vis-NIR. In addition, the effects of modified MWCNTs on cement hydration were investigated to describe the dispersibility of MWCNTs in cement pastes indirectly. Results show that oxygen functional groups generated on the surface of MWCNTs after acidification and KH-570 grafted on acidified MWCNTs through ≡Si–O–C≡ before radical polymerization with HPEG. MWCNTs modified by HPEG exhibit better dispersibility than pristine MWCNTs in a simulated cement pastes environment prepared at pH∼13. The additions of functionalized MWCNTs (P3-S-MWCNTs) promote the hydration of cement pastes indicated from isothermal conduction calorimeter measurement and X-ray diffraction analysis. Scanning electron microscopy observation confirmed the good dispersibility of functionalized MWCNTs in cement pastes. The promoting effect on cement hydration of P3-S-MWCNTs may attribute to the well-dispersed MWCNTs. The dispersed MWCNTs can act as the nucleating agent for carbon-sulfur-hydrogen and carbon-hydrogen, thus promoting the hydration of cement.
Issue Section:
Technical Manuscript
References
1.
B.
Wang
,
B.
Guo
,
Y.
Han
,
Y.
Zhang
, and
Y.
Li
, “Microstructure Synthesis and Characterization of Carbon Nanofibers Reinforced Cement-Based Composites
,”
Journal of Testing and Evaluation
47
, no. 6
(2019
): 4379
–4388
,
2.
A. L.
Materazzi
,
F. D.
Ubertini
, and
A.
D’Alessandro
, “Carbon Nanotube Cement-Based Transducers for Dynamic Sensing of Strain
,”
Cement and Concrete Composites
37
, no. 1
(March 2013
): 2
–11
,
3.
E. W.
Wong
,
P. E.
Sheelan
, and
C. M.
Lieber
, “Nanobeam Mechanics: Elasticity, Strength, and Toughness of Nanorods and Nanotubes
,”
Science
277
(September 1997
): 1971
–1975
,
4.
B.
Han
,
S.
Sun
,
S.
Ding
,
L.
Zhang
,
X.
Yu
, and
J.
Ou
, “Review of Nanocarbon-Engineered Multifunctional Cementitious Composites
,”
Composites Part A: Applied Science and Manufacturing
70
(March 2015
): 69
–81
,
5.
M. S.
Konsta-Gdoutos
,
Z. S.
Metaxa
, and
S. P.
Shah
, “Highly Dispersed Carbon Nanotube Reinforced Cement Based Materials
,”
Cement and Concrete Research
40
, no. 7
(July 2010
): 1052
–1059
,
6.
Y.
Hu
,
D.
Luo
,
P.
Li
,
Q.
Li
, and
G.
Sun
, “Fracture Toughness Enhancement of Cement Paste with Multi-Walled Carbon Nanotubes
,”
Construction and Building Materials
70
(November 2014
): 332
–338
,
7.
S. P.
Shah
,
P.
Hou
, and
X.
Cheng
, “Durability of Cement-Based Materials and Nano-particles: A Review
,” in
Nanotechnology in Construction
(Cham, Switzerland
: Springer International Publishing
, 2015
), 15
–24
.8.
B.
Han
,
Z.
Yang
,
X.
Shi
, and
X.
Yu
, “Transport Properties of Carbon-Nanotube/Cement Composites
,”
Journal of Materials Engineering and Performance
22
, no. 1
(January 2013
): 184
–189
,
9.
G. Y.
Li
,
P. M.
Wang
, and
X.
Zhao
, “Mechanical Behavior and Microstructure of Cement Composites Incorporating Surface-Treated Multi-Walled Carbon Nanotubes
,”
Carbon
43
, no. 6
(May 2005
): 1239
–1245
,
10.
M. S.
Konsta-Gdoutos
and
C. A.
Aza
, “Self Sensing Carbon Nanotube (CNT) and Nanofiber (CNF) Cementitious Composites for Real Time Damage Assessment in Smart Structures
,”
Cement and Concrete Composites
53
(October 2014
): 162
–169
,
11.
F.
Collins
,
J.
Lambert
, and
W. H.
Duan
, “The Influences of Admixtures on the Dispersion, Workability, and Strength of Carbon Nanotube–OPC Paste Mixtures
,”
Cement and Concrete Composites
34
, no. 2
(February 2012
): 201
–207
,
12.
F.
Ko
,
Y.
Gogotsi
,
A.
Ali
,
N.
Naguib
,
H.
Ye
,
G. L.
Yang
,
C.
Li
, and
P.
Willis
, “Electrospinning of Continuous Carbon Nanotube-Filled Nanofiber Yarns
,”
Advanced Materials
15
, no. 14
(July 2003
): 1161
–1165
,
13.
J.
Pang
,
G.
Xu
,
S.
Yuan
,
Y.
Tan
, and
F.
He
, “Dispersing Carbon Nanotubes in Aqueous Solutions by a Silicon Surfactant: Experimental and Molecular Dynamics Simulation Study
,”
Colloids and Surfaces A: Physicochemical and Engineering Aspects
350
, nos. 1–3
(October 2009
): 101
–108
,
14.
P.-C.
Ma
,
N. A.
Siddiqui
,
G.
Marom
, and
J.-K.
Kim
, “Dispersion and Functionalization of Carbon Nanotubes for Polymer-Based Nanocomposites: A Review
,”
Composites Part A: Applied Science and Manufacturing
41
, no. 10
(October 2010
): 1345
–1367
,
15.
L.
Vaisman
,
H. D.
Wagner
, and
G.
Marom
, “The Role of Surfactants in Dispersion of Carbon Nanotubes
,”
Advances in Colloid and Interface Science
128–130
(December 2006
): 37
–46
,
16.
B.
Kraus
,
M.
Mende
,
P.
Pötschke
, and
G.
Petzold
, “Dispersability and Particle Size Distribution of CNTs in an Aqueous Surfactant Dispersion as a Function of Ultrasonic Treatment Time
,”
Carbon
48
, no. 10
(August 2010
): 2746
–2754
,
17.
Z.
Kónya
,
J.
Zhu
,
K.
Niesz
,
D.
Mehn
, and
I.
Kiricsi
, “End Morphology of Ball Milled Carbon Nanotubes
,”
Carbon
42
, no. 10
(2004
): 2001
–2008
,
18.
H.
Liu
,
S.
Cui
,
J.
Wang
, and
J.
Wang
, “Influence of Chemical Admixtures on the Dispersion of Carbon Nanotubes in Water and Cement Pastes
,”
Materials Science and Engineering
182
(2017
): 012029
,
19.
S.
Parveen
,
S.
Rana
,
R.
Fangueiro
, and
M. C.
Paiva
, “Microstructure and Mechanical Properties of Carbon Nanotube Reinforced Cementitious Composites Developed Using a Novel Dispersion Technique
,”
Cement and Concrete Research
73
(July 2015
): 215
–227
,
20.
F.
Inam
,
A.
Heaton
,
P.
Brown
,
T.
Peijs
, and
M. J.
Reece
, “Effects of Dispersion Surfactants on the Properties of Ceramic–Carbon Nanotube (CNT) Nanocomposites
,”
Ceramics International
40
, no. 1
(January 2014
): 511
–516
,
21.
Y. A. J.
Al-Hamadani
,
K. H.
Chu
,
A.
Son
,
J.
Heo
,
N.
Her
,
M.
Jang
,
C. M.
Park
, and
Y.
Yoon
, “Stabilization and Dispersion of Carbon Nanomaterials in Aqueous Solutions: A Review
,”
Separation and Purification Technology
156
(December 2015
): 861
–874
,
22.
S. P.
Shah
,
M. S.
Konsta-Gdoutos
, and
Z. S.
Metaxa
, “Advanced Cement Based Nanocomposites
,” in
Recent Advances in Mechanics
(Cham, Switzerland
: Springer Nature
, 2011
), 313
–327
.23.
A.
Sobolkina
,
V.
Mechtcherine
,
V.
Khavrus
,
D.
Maier
,
M.
Mende
,
M.
Ritschel
, and
A.
Leonhardt
, “Dispersion of Carbon Nanotubes and Its Influence on the Mechanical Properties of the Cement Matrix
,”
Cement and Concrete Composites
34
, no. 10
(November 2012
): 1104
–1113
,
24.
J. M.
Makar
and
G. W.
Chan
, “Growth of Cement Hydration Products on Single Walled Carbon Nanotubes
,”
Journal of the American Ceramic Society
92
, no. 6
(June 2009
): 1303
–1310
,
25.
T.
Nochaiya
and
A.
Chaipanich
, “Behavior of Multi-Walled Carbon Nanotubes on the Porosity and Microstructure of Cement-Based Materials
,”
Applied Surface Science
257
, no. 6
(January 2011
): 1941
–1945
,
26.
M.
Del Carmen Camancho
,
O.
Galao
,
F. J.
Baeza
,
E.
Zornoza
, and
P.
Garcés
, “Mechanical Properties and Durability of CNT Cement Composites
,”
Materials
7
, no. 3
(February 2014
): 1640
–1651
,
27.
M. T.
Kim
,
K. Y.
Rhee
,
S. J.
Park
, and
D.
Hui
, “Effects of Silane-Modified Carbon Nanotubes on Flexural and Fracture Behaviors of Carbon Nanotube-Modified Epoxy/Basalt Composites
,”
Composites Part B: Engineering
43
, no. 5
(July 2012
): 2298
–2302
,
28.
H.
Liu
,
J.
Wang
,
J.
Wang
, and
S.
Cui
, “Sulfonitric Treatment of Multiwalled Carbon Nanotubes and Their Dispersibility in Water
,”
Materials
11
, no. 12
(December 2018
): 2442
,
29.
A.
Kuznetsova
,
D. B.
Mawhinney
,
V.
Naumenko
,
J. T.
Yates
Jr
,
J.
Liu
, and
R. E.
Smalley
, “Enhancement of Adsorption inside of Single-Walled Nanotubes: Opening the Entry Ports
,”
Chemical Physics Letters
321
, nos. 3–4
(April 2000
): 292
–296
,
30.
J.-H.
Lee
,
K. Y.
Rhee
, and
S. J.
Park
, “Silane Modification of Carbon Nanotubes and Its Effects on the Material Properties of Carbon/CNT/Epoxy Three-Phase Composites
,”
Composites Part A: Applied Science and Manufacturing
42
, no. 5
(May 2011
): 478
–483
,
31.
Z.
Lu
,
X.
Kong
,
H.
Liu
,
Z.
Wang
,
Y.
Zhang
,
B.
Dong
, and
F.
Xing
, “Interaction of Silylated Superplasticizers with Cementitious Materials
,”
Journal of Applied Polymer Science
133
, no. 43
(July 2016
): 44161
,
32.
S.
Lv
,
Y.
Ma
,
C.
Qiu
,
T.
Sun
,
J.
Liu
, and
Q.
Zhou
, “Effect of Graphene Oxide Nanosheets of Microstructure and Mechanical Properties of Cement Composites
,”
Construction and Building Materials
49
(December 2013
): 121
–127
,
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