Hybrid effects of nano-silica and graphene oxide on mechanical properties and hydration products of oil well cement

Liu, Huiting; Yu, Youming; Liu, Huimin; Jin, Jianzhou; Liu, Shuoqiong

doi:10.1016/j.conbuildmat.2018.10.029

Cited by 88 publications

(43 citation statements)

References 33 publications

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“…The peak of 1101 cm −1 belongs to result of SiOSi bond stretching vibration . Besides, SiO stretching and bending vibrations produce peaks at 800 and 470 cm −1 , respectively . Figure C represents GNP, that is a line without peak due to the fact that GNP does not have dipole moment .…”

Section: Resultsmentioning

confidence: 99%

Thermal properties and characterization of palmitic acid/nano silicon dioxide/graphene nanoplatelet for thermal energy storage

et al. 2020

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Palmitic acid (PA), nano silicon dioxide (nano SiO 2 ), and graphene nanoplatelets (GNPs) were fabricated to composite phase change materials (PCMs) for thermal energy storage. PA acted as PCM, nano SiO 2 was used as supporting material. GNP as thermal conductivity promoter was added to modify composite PCM. Nano SiO 2 has good adsorption property and can adsorb liquid PCM to prevent leakage. Leakage measurement indicated that PA maximum content in composite PCM is 70 wt%. Chemical and crystal structures, and microstructure of composite PCM were tested by Fourier transformation infrared spectroscope, X-ray diffractometer and scanning electronic microscope, which showed that the raw materials are well mixed by physical action. Differential scanning calorimeter result presented that composite PCM possess phase change temperature at about 60 C and latent heat of 128.42 kJ/ kg. Thermogravimetric analyzer and thermal cycle experiment showed that composite PCM have outstanding thermal stability and durability. Thermal conductivity apparatus measurement results indicated that thermal conductivity of composite PCM with 5 wt% GNP is 1.65 times that of composite PCM without GNP. Therefore, this composite PCM are potential materials for thermal energy storage. K E Y W O R D Scomposite phase change material, graphene nanoplatelet, nano silicon dioxide, thermal energy storage, thermal property

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Section: Resultsmentioning

confidence: 99%

Thermal properties and characterization of palmitic acid/nano silicon dioxide/graphene nanoplatelet for thermal energy storage

et al. 2020

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“…Hence, the composition of pore structure is refined, and the porosity is reduced. Moreover, GO nanosheets can also fill in the gap between hydration products, and further intensify the compaction effect [29]. The older the age is, the more obvious the compaction effect will be.…”

Section: Discussionmentioning

confidence: 99%

“…It was widely believed that GO can promote the hydration reaction of cement-based materials [25][26][27][28]. The pore structure and microstructure of cement-based materials doped with graphene oxide were also studied [17,29]. It was believed that GO can refine pore structure.…”

Section: Introductionmentioning

confidence: 99%

Mechanical Properties and Shrinkage Behavior of Concrete-Containing Graphene-Oxide Nanosheets

Chen

Hua

et al. 2020

Materials

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Graphene oxide (GO) has been widely used as an additive due to its numerous unique properties. In this study, the compressive strength, flexural strength and elasticity modulus of concrete containing 0.02 wt%, 0.05 wt % and 0.08 wt % GO, and its dry shrinkage performance have been experimentally investigated. After the sample preparation, apparatus for compression test and flexural test were used to test the relevant properties of concrete containing GO. The dial indicators were used to measure the shrinkage of samples. The results indicate that GO can considerably improve the compressive strength, flexural strength, and elasticity modulus of concrete at the concrete age of 28 days by 4.04–12.65%, 3.8–7.38%, and 3.92–10.97%, respectively, which are substantially smaller than the increment at the age of 3 d by 5.02–21.51%, 4.25–13.06%, and 6.07–27.45% under a water-cement ratio of 0.35. It was also found that GO can increase the shrinkage strain of concrete. For example, at the age of 60 days, 0.02 wt%, 0.05 wt% and 0.08 wt% GO can increase the shrinkage strain of ordinary concrete by 1.99%, 5.79% and 7.45% respectively under a water-cement ratio of 0.49. The study has advanced our understanding on mechanical and shrinkage behavior of concrete containing GO.

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“…In addition, an excellent hydrophobic surface was obtained at the water contact angle of 145°. In fi elds other than textile, silica nanoparticles are extensively used in the manufacturing of durable superamphiphobic nano-silica and epoxy composites [12], surface treatments [13], coating and fi lm formation [14−17], cement technology [18,19], drilling fl uid in natural gas extraction [20], multifunctional eff ects on wooden materials [21], in the fi eld of medicines [22], immobilisation of protein [23], separation of components from emulsion [24], constructing pig houses [25] and many others. However, very high costs of silica nanoparticles restrict their use in commercial application.…”

Section: Introductionmentioning

confidence: 99%

Comparative Performance of Synthesised Silica Nanoparticles for Enhanced Hydrophilic Properties on Cotton

Chakraborty¹,

Sharma²

2019

TEK

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Chemicals in nano-form are free from aggregates and low concentration eff ective. The nanoparticles of certain chemicals have been found to be of substantial importance for application in textiles as well as allied fi elds. Nano-silica is one of such nanoparticles possessing enormous potential for multi-functional application on cotton. However, the cost of nanoparticles is remarkably high, thus limiting their commercial applications. This study discusses the manufacture of silica nanoparticles in a laboratory, their characterisation, succeeded by their application on cotton. The performance was compared with those obtained with tailormade silica nanoparticles from manufacturers. It was found that laboratory-made silica nanoparticles are relatively capable of developing a parallel fi nishing eff ect on cotton compared to those obtained with tailormade silica nanoparticles.

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Hybrid effects of nano-silica and graphene oxide on mechanical properties and hydration products of oil well cement

Cited by 88 publications

References 33 publications

Thermal properties and characterization of palmitic acid/nano silicon dioxide/graphene nanoplatelet for thermal energy storage

Thermal properties and characterization of palmitic acid/nano silicon dioxide/graphene nanoplatelet for thermal energy storage

Mechanical Properties and Shrinkage Behavior of Concrete-Containing Graphene-Oxide Nanosheets

Comparative Performance of Synthesised Silica Nanoparticles for Enhanced Hydrophilic Properties on Cotton

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