Study on Compressive Mechanical Properties of Graphene Aerogel

doi:10.12382/bgxb.2023.0302

Abstract

Abstract:

In order to explore the potential application of graphene aerogel in the field of protection, different graphene aerogel samples are prepared by a freeze-drying method and controlled freezing temperature variable, and the uniaxial in-plane compressive mechanics experiments are carried out. The deformation pattern and failure mechanism are analyzed by using 3D digital image correlation (DIC) technology and scanning electron microscope (SEM).The results show that the graphene aerogel samples prepared by freeze-drying method have the characteristics of three-dimensional porous network structure, low density (<33.93mg/cm³) and high porosity(>98.5%), and have the characteristic microstructure affected by freezing temperature. The compressive stress-strain curves of graphene aerogel exhibit the typical three-stage characteristics of porous materials, and its mechanical properties are affected by the freezing temperature.The Young’s modulus of graphene aerogel obtained at -80℃ is increased by 160% compared with that at -19℃, and the energy absorption per unit volumeis increased by 67%. With the expansion of internal dense region during multiple cyclic loading-unloading of graphene aerogel samples, the absorption energy dominated by plastic energy tends to be stable and unchanged, and its states can be described by the exponential decay model. The different compression deformation forms of the transverse and longitudinal lamellas of graphene aerogels are developed into large-scale spring-like tight folding form, which made the graphene aerogels show resilience. This study provides a theoretical and practical basis for the application of graphene aerogels in the field of protection.

Key words: graphene aerogel, compressive mechanical property, freeze-drying method, energy absorption characteristics, deformation pattern

CLC Number:

TJ03

CAO Luqing, QIAO Yang, XIE Jing, CHEN Pengwan. Study on Compressive Mechanical Properties of Graphene Aerogel[J]. Acta Armamentarii, 2024, 45(7): 2364-2373.

Figures/Tables 15

Fig.1 Schematic diagram of freezen drying

Table 1 Reagents used for experiments

名称	化学式/简称	厂家
单层GO水相分散液	GO	杭州高烯科技有限公司
VC	C₆H₈O₆	上海麦克林生化科技有限公司
去离子水	H₂O	阿拉丁试剂(上海)有限公司

Table 2 Equipment used for experiments

名称	型号	厂家
电子天平	BSA423S-CW	赛多利斯科学仪器 (北京)有限公司
电热真空干燥箱	D2F-6020AB	天津工兴实验室仪器有限公司
集热式恒温磁力搅拌器	DF-101S	邦西仪器科技(上海)有限公司
超声波清洗器	KQ-300E	昆山市超声仪器有限公司
FD机	FD-1A-50	上海比朗仪器制造有限公司

Fig.2 Quasi-static compressive loading device and 3D-DIC test device

Table 3 Density of graphene aerogel samples at different temperatures

制备冷冻温度/℃	表观密度/(mg·cm^-3)	孔隙率/%
-19	30.44±0.91	98.65
-80	32.44±1.20	98.56

Fig.3 Cross-sectional SEM images of GA samples

Fig.4 Longitudinal cross-sectional SEM images of GA samples

Fig.5 Formation mechanism

Fig.6 Stress-strain curves under uniaxial quasi-static compression

Fig.7 Cyclic loading stress-strain curves with different strain amplitudes

Fig.8 Energy analysis of single quasi-static compression

Fig.9 Energy analysis of cyclic loading of samples at -80℃

Table 4 Fitting parameters in the exponential decay model

最大应力、单位体积吸能与塑性能占比	A	t	y₀	R²
σ_max/MPa	0.11	0.96	0.18	0.99424
W/(MJ·m^-3)	-0.06	7.43	0.10	0.99968
P_t/%	18.23	5.57	81.25	0.99967

Fig.10 Strain contours of GA samples

Fig.11 SEM images of GA samples after compression

References 29

[1]	CHEN D, FENG H B, LI J H. Graphene oxide: preparation, functionalization, and electrochemical applications[J]. Chemical Reviews, 2012, 112(11):6027-6053. doi: 10.1021/cr300115g pmid: 22889102
[2]	GEORGAKILAS V, OTYEPKA M, BOURLINOS A B, et al. Functionalization of graphene:covalent and non-covalent approaches, derivatives and applications[J]. Chemical Reviews, 2012, 112(11):6156-6214.
[3]	NOVOSELOV K S, GEIM A K, MOROZOV S V, et al. Electric field effect in atomically thin carbon films[J]. Science, 2004, 306(5696):666-669. doi: 10.1126/science.1102896 pmid: 15499015
[4]	GORGOLIS G, GALIOTIS C. Graphene aerogels:a review[J]. 2D Materials, 2017, 4(3): 032001.
[5]	SUN H Y, XU Z, GAO C. Multifunctional, ultra-flyweight, synergistically assembled carbon aerogels[J]. Advanced Materials, 2013, 25(18):2554-2560.
[6]	LI J H, LI J Y, MENG H, et al. Ultra-light, compressible and fire-resistant graphene aerogel as a highly efficient and recyclable absorbent for organic liquids[J]. Journal of Materials Chemistry A, 2014, 2(9): 2934-2941.
[7]	LIU X, CUI J S, SUN J B, et al. 3D graphene aerogel-supported SnO₂ nanoparticles for efficient detection of NO₂[J]. RSC Advances, 2014, 4(43): 22601-22605.
[8]	XIAO L, WU D Q, HAN S, et al. Self-assembled Fe₂O₃/graphene aerogel with high lithium storage performance[J]. ACS Applied Materials & Interfaces, 2013, 5(9): 3764-3769.
[9]	WU Z S, YANG S B, SUN Y, et al. 3D Nitrogen-doped graphene aerogel-supported Fe₃O₄ nanoparticles as efficient electrocatalysts for the oxygen reduction reaction[J]. Journal of the American Chemical Society, 2012, 134(22):9082-9085.
[10]	SUI Z Y, MENG Q H, ZHANG X T, et al. Green synthesis of carbon nanotube-graphene hybrid aerogels and their use as versatile agents for water purification[J]. Journal of Materials Chemistry, 2012, 22(18):8767-8771.
[11]	ZHOU S, JIANG W, WANG T H, et al. Highly hydrophobic, compressible, and magnetic polystyrene/Fe₃O₄/graphene aerogel composite for oil-water separation[J]. Industrial & Engineering Chemistry Research, 2015, 54(20):5460-5467.
[12]	WORSLEY M A, PAUZAUSKIE P J, OLSON T Y, et al. Synthesis of graphene aerogel with high electrical conductivity[J]. Journal of the American Chemical Society, 2010, 132(40):14067-14069. doi: 10.1021/ja1072299 pmid: 20860374
[13]	WANG S W, WANG Z P, FUTAMURA R, et al. Highly microporous-graphene aerogel monolith of unidirectional honeycomb macro-textures[J]. Chemical Physics Letters, 2017, 673: 38-43.
[14]	DONG L, CHEN Z X, ZHAO X X, et al. A non-dispersion strategy for large-scale production of ultra-high concentration graphene slurries in water[J]. Nature Communications, 2018, 9(1):76. doi: 10.1038/s41467-017-02580-3 pmid: 29311547
[15]	SHAO G F, HANAOR D A H, SHEN X D, et al. Freeze casting: from low-dimensional building blocks to Aligned porous structures—areview of novel materials, methods, and applications[J]. Advanced Materials, 2020, 32(17):1907176.
[16]	LÜ L X, ZHANG P P, XU T, et al. Ultrasensitive pressure sensor based on an ultralight sparkling graphene block[J]. ACS Applied Materials & Interfaces, 2017, 9(27):22885-22892.
[17]	JUNG S M, MAFRA D L, LIN C T, et al. Controlled porous structures of graphene aerogels and their effect on supercapacitor performance[J]. Nanoscale, 2015, 7(10):4386-4393. doi: 10.1039/c4nr07564a pmid: 25682978
[18]	LI X H, LIU P F, LI X F, et al. Vertically aligned, ultralight and highly compressive all-graphitized graphene aerogels for highly thermally conductive polymer composites[J]. Carbon, 2018, 140:624-633.
[19]	QIU L, LIU J Z, CHANG S L Y, et al. Biomimetic superelastic graphene-based cellular monoliths[J]. Nature Communications, 2012, 3(1):1-7.
[20]	SUI Z Y, ZHANG X T, LEI Y, et al. Easy and green synthesis of reduced graphite oxide-based hydrogels[J]. Carbon, 2011, 49(13): 4314-4321.
[21]	AVALLE M, BELINGARDI G, MONTANINI R. Characterization of polymeric structural foams under compressive impact loading by means of energy-absorption diagram[J]. International Journal of Impact Engineering, 2001, 25(5):455-472.
[22]	PETERS W H, RANSON W F. Digital imaging techniques in experimental stress analysis[J]. Optical Engineering, 1982, 21(3): 427-431.
[23]	YAMAGUCHI I. A laser-speckle strain gauge[J]. Journal of Physics E: Scientific Instruments, 1981, 14(11): 1270-1273.
[24]	WILSON P W, HENEGHAN A F, HAYMET A D J. Ice nucleation in nature: supercooling point(SCP) measurements and the role of heterogeneous nucleation[J]. Cryobiology, 2003, 46(1):88-98.
[25]	LANGER J S, MÜLLER-KRUMBHAAR H. Theory of dendritic growth—I. elements of a stability analysis[J]. Acta Metallurgica, 1978, 26(11):1681-1687.
[26]	LANGER J S, MÜLLER-KRUMBHAAR H. Theory of dendritic growth—II. Instabilities in the limit of vanishing surface tension[J]. Acta Metallurgica, 1978, 26(11):1689-1695.
[27]	BAHRAMI A, SIMON U, SOLTANI N, et al. Eco-fabrication of hierarchical porous silica monoliths by ice-templating of rice husk ash[J]. Green Chemistry, 2017, 19(1): 188-195.
[28]	BAI H, CHEN Y, DELATTRE B, et al. Bioinspired large-scale aligned porous materials assembled with dual temperature gradients[J]. Science Advances, 2015, 1(11):e1500849.
[29]	NELSON I, OGDEN T A, AL KHATEEB S, et al. Freeze-casting of surface-magnetized iron(II,III) oxide particles in a uniform static magnetic field generated by a helmholtz coil[J]. Advanced Engineering Materials, 2019, 21(3):1801092-1801103.