Effect of Carbon Nanotube and Styrene-Acrylic Emulsion Additives on Microstructure and Mechanical Characteristics of Cement Paste

Fan, Jie; Li, Gengying; Deng, Sijie; Deng, Chengwei; Wang, Zhongkun; Zhang, Zhi Jun

doi:10.3390/ma13122807

Cited by 16 publications

(9 citation statements)

References 35 publications

(27 reference statements)

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“…e emulsion is an important material that determines the properties of coatings. Styrene acrylic emulsion has the advantages of low pollution, low lm forming temperature, and low price, but it is still not perfect in water resistance, corrosion resistance, and wear resistance [1]. ese de ciencies limit the application of styrene acrylic emulsion, while nano-ZnO has good wear resistance and photocatalysis.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Nano-ZnO Composite Polystyrene Acrylic Emulsion and Its Application in Chinese Painting Pigments

Sun

2022

Advances in Materials Science and Engineering

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With the continuous development of coating technology and environmental protection concepts, coating has become an indispensable item in the field of architecture and industry. Styrene acrylic emulsion as a new type of waterborne paint has attracted much attention since its emergence. Its functional modification is the focus of research, but the research results have not been ideal. To further improve the performance of styrene acrylic emulsion, nano-ZnO composite polystyrene emulsion was synthesized by emulsion polymerization, and its properties were analyzed. Aiming at the problem that nanopigments are prone to agglomeration, corresponding solutions are proposed, and the stability of nano-coatings is preliminarily studied. The inherent culture and essence of traditional culture and art is the wealth of realizing the unique nationalization and internationalization of design works. There is a lot of artistic quintessence in traditional Chinese painting art that can be used for reference to visual communication design. Through in-depth understanding and learning of Chinese painting theory and techniques, designers’ aesthetic abilities and innovation abilities can be qualitatively improved. First of all, the emulsion polymerization was carried out by semicontinuous method. The composite polystyrene emulsion containing different content of nano-ZnO was successfully prepared, which was recorded as N, Z, Z15, Z25, and Z35, respectively. The properties of the emulsion were determined, and the solid content, monomer conversion, viscosity, water absorption, and bacteriostatic effect of the emulsion were determined. The experimental results show that the solid content of emulsion Z15 (nano-ZnO content is 15%) reaches the highest value of 43.5%. The content of monomer in the emulsion affects the solid content, but the higher the monomer content, the better the solid content. The highest monomer conversion of Z15 was 86.4% at 80°C. The monomer conversion increased with the increase of polymerization temperature and tended to be stable after reaching the highest value. In the absence of nano-ZnO, the viscosity of the emulsion is the highest, and the viscosity of the emulsion decreases with the increase of the content of nano-ZnO monomer. Z35 (when the content of nano-ZnO is 35%) is the highest, which is 18.91%. The water absorption increases with the increase of nano-ZnO content. The content of nano-ZnO in the emulsion increased, the MIC value became smaller, and the bacteriostatic effect became better and better. This indicates that nano-ZnO composite polystyrene emulsion has good monomer conversion, super water resistance, and bacteriostatic effect, but its viscosity is relatively poor.

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Section: Introductionmentioning

confidence: 99%

Synthesis of Nano-ZnO Composite Polystyrene Acrylic Emulsion and Its Application in Chinese Painting Pigments

Sun

2022

Advances in Materials Science and Engineering

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“…30 Additionally, the volume and the type of the carbon nanomaterial have an impact on the crystallization process, affecting the discrete microphases developed in the cementitious matrix, supporting further the differences appearing in the Raman spectra of the cementitious nanocomposites. 31,32 The microstructure of the cement/ SWCNT-nCB (0.5−0.25) nanocomposite at 28 days is presented in Figure 2d. Well-dispersed SWCNTs with selfassembled nCB nanoparticles can be detected within the cementitious matrix, suggesting the creation of conductive paths within the cement paste.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

Structural Carbon-Enhanced Cementitious Thermoelectric Generators (TEGs): Optimal Energy Filtering and TEG Design for Outstanding Energy Harvesting

Vareli,

Gkaravela,

Polyviou

et al. 2023

ACS Appl. Electron. Mater.

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We report on the development of a cementitious structural thermoelectric generator (TEG), exhibiting a significantly improved power density of 1.2 W/m 2 , via the optimization of the thermoelectric response of individual thermoelements and the TEG assembly. Toward this aim, we combined nano carbon black (nCB) and single-walled carbon nanotubes (SWCNTs) within the cementitious matrix to maximize the carrier-filtering effect for optimal thermoelectric efficiency. The multidimensional carbon nanomaterials self-assembled through electrostatic forces during the dispersion process in aqueous media and formed conductive networks inside the cement matrix at low filler contents. Simultaneously, the additional interfaces between the nCB and the SWCNT nano-reinforcement supported the selective scattering of low-energy carriers. Thus, cementitious thermoelements with significantly enhanced Seebeck coefficient were produced. To our knowledge, the Seebeck, S (+4644.2 μV/K), and power factor, PF (1.51 × 10 4 μW/mK 2 ), values attained in this study are the highest ever reported to date for nanoadditivebased cementitious thermoelectric nanocomposites. The optimal design of the proposed Hybrid TEG device (utilizing thermoelements with only SWCNTs and with SWCNTs/nCB reinforcement) resulted in a decrease of the internal electrical resistance of our cementitious thermoelectric generator, further optimizing its power output, which enabled, under a small ΔΤ of 25 K, the generation of enough power for the autonomous operation of microelectronic devices, like wireless sensors.

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“…Multiple methods have been employed to solve this problem, such as fiber modification [ 3 ], mix design [ 4 ] and polymer modification [ 5 , 6 , 7 , 8 , 9 ]. Among these techniques, polymer-modified cement/concrete (PMC), which applies polymer latexes in cementitious material modification by mimicking the structure of biominerals [ 10 , 11 ], has gained major research concern in the past decades [ 12 , 13 , 14 , 15 , 16 ].…”

Section: Introductionmentioning

confidence: 99%

“…Fortunately, with the advance in nanotechnology and new polymer design techniques, new solutions have been found to solve the above problems [ 27 , 28 , 29 , 30 , 31 ]. Due to their nano-scale size, nano latexes are able to achieve finer structures [ 15 , 28 ] in the hydration product network, which promotes compatibility. Additionally, surface structure and modification of nano materials are also readily tailorable, making them versatile [ 32 , 33 ].…”

Section: Introductionmentioning

confidence: 99%

Investigation of the Effect of Particle Surface Charge and Dispersion Stability on Latex Behavior in Cement Using Non-Ionic and Traditional Latexes

Zhou

Yan²,

Yang³

et al. 2022

Materials

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In this work, a novel total non-ionic polystyrene-polyurethane (PS-PU) composite latex was synthesized with polymerizable polyethylene glycol ether. Contrary to traditional styrene-butyl acrylate latex (St-BA), PS-PU has a smaller size and superior dispersion stability, and it is stable in saturated Ca(OH)2 even after 72 h. In fresh-mixed mortars, PS-PU showed a little adverse effect on workability and insignificant air entrainment, with little defoamer consumption. The retardation effect of PS-PU is also much milder than traditional St-BA. As for strength, PS-PU showed a less adverse effect on early and late age compressive strength, but its effect on flexural strength is not as pronounced as St-BA at high dosages (4% and 6%). The different behavior in cementitious materials between PS-PU and St-BA can be reasoned from their different adsorption behavior and surface charge properties, as the results from characterizations suggest. The non-ionic nature of PS-PU made it less prone to destabilization and adsorption, which turned out as the aforementioned behavior in cementitious systems. The difference can further be ascribed to the difference in their polymeric structure and properties.

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Effect of Carbon Nanotube and Styrene-Acrylic Emulsion Additives on Microstructure and Mechanical Characteristics of Cement Paste

Cited by 16 publications

References 35 publications

Synthesis of Nano-ZnO Composite Polystyrene Acrylic Emulsion and Its Application in Chinese Painting Pigments

Synthesis of Nano-ZnO Composite Polystyrene Acrylic Emulsion and Its Application in Chinese Painting Pigments

Structural Carbon-Enhanced Cementitious Thermoelectric Generators (TEGs): Optimal Energy Filtering and TEG Design for Outstanding Energy Harvesting

Investigation of the Effect of Particle Surface Charge and Dispersion Stability on Latex Behavior in Cement Using Non-Ionic and Traditional Latexes

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