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Supporting Information
Revealing the Interrelation between Hydrogen Bonds and Interfaces in Graphene/PVA
Composites towards Highly Electrical Conductivity
Lijun Yang, Wei Weng, Xiang Fei*, Liang Pan, Xinao Li, Wenting Xu, Zexu Hu, Meifang Zhu*
State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science
and Engineering, Donghua University, 2999 North Renmin Road, Shanghai 201620, China;
Author information:* Corresponding author.
E-mails: [email protected] (Meifang Zhu).
[email protected] (Xiang Fei)
First author: [email protected](Lijun Yang)
S1
Figure S1. SEM images of loosely bound blocks after pre-aggregation treated. (a,b) SRGO; (c,d) HRGO.
S2
Figure S2. The FT-IR spectrum of different filler content in the PVA matrix.
S3
Figure S3. The variable temperature infrared spectrum of PVA/HRGO.
S4
Figure S4. Variable temperature FT-IR spectrum of PVA.
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Table S1. The fitting results of various kinds of hydrogen bonds in PVA-SRGO nanocomposite.
Temperature(C)
Hydrogen bond typeWavenumber
(cm1 )Peak area
Relative strength (%)
Standard deviation
65
Cyclic OH Ⅰ 3214 43.50 26.7 0.20OH…ether O Ⅱ 3304 43.65 26.8 1.75
Self-associated OH Ⅲ 3408 74.08 45.5 3.21OH…π Ⅳ 3513 1.47 0.9 0.13
85
Cyclic OH Ⅰ 3216 41.76 26.4 0.10OH…ether O Ⅱ 3303 38.76 24.5 2.01
Self-associated OH Ⅲ 3408 76.07 48.1 1.57OH…π Ⅳ 3514 1.64 1.0 0.22
105
Cyclic OH Ⅰ 3219 38.89 25.3 2.45
OH…ether O Ⅱ 3302 30.79 20.0 2.02Self-associated OH Ⅲ 3409 81.57 53.0 3.30
OH…π Ⅳ 3514 2.69 1.8 0.62
Table S2. The fitting results of various kinds of hydrogen bonds in PVA-HRGO nanocomposite.
Temperature(C)
Hydrogen bond typeWavenumber
(cm1)Peak area
Relative strength (%)
Standard deviation
65
Cyclic OHOH…ther O
Self-associated OHOH…π
ⅠⅡⅢⅣ
3218 3304 3410 3512
59.3174.66113.322.73
23.729.945.31.1
0.431.263.051.01
85
Cyclic OHOH…ether O
Self-associated OHOH…π
ⅠⅡⅢⅣ
3220 3303 3410 3513
56.6565.17116.883.56
23.426.948.21.5
1.323.862.240.80
105
Cyclic OHOH…ether O
Self-associated OHOH…π
ⅠⅡⅢⅣ
3221 3299 3408 3511
54.7654.03122.173.82
23.323.052.01.6
2.163.982.740.95
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Table S3. Comparison on conductivity between this work and the graphene and rGO-containing nanocomposite.
Filler Matrix*Maximum Loading
(wt%)Maximum
conductivity (S m1)Ref.
rGO
PVDF 7 ~10 [S1]PS 6.4 ~1 [S2]
PVA 7.5 ~10 [S3]PVA 14 5.92 [S4]PVA 50 ~1 [S5]
Epoxy 14 ~1 [S6]Epoxy 3 0.9 [S7]
Chitosan 6 1.2 [S8]Epoxy 6.6 0.16 [S9]
Graphene
PET 2.4 0.074 [S10]
SBR 15 3.7 [S11]HDPE 18 0.1 [S12]PVDF 4 0.031 [S13]
PU 10 0.25 [S14]PMMA 5 3.11 [S15]
UHMWPE 40 9.09 [S16]Epoxy 2 0.01 [S17]
PU 40 0.18 [S18]
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* PET: polyethylene glycol terephthalatePS: polystyrene PVDF: poly(vinylidene fluoride) HDPE: high-density polyethylene UHMWPE: Ultrahigh molecular weight polyethylene.
PVA: poly (vinyl alcohol); PMMA: polymethyl methacrylate; PU: polyurethane;SBR: styrene butadiene rubber;
Figure S5. The relationship between drawing temperature and maximum drawing ratio and conductivity.
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