Application of cross-linked poly(acrylic acid)-poly(styrene-alt-maleic anhydride) core-shell microcapsule absorbents in cement mortars

Jang, Seok-Soo; Jung, Yong-Wook; Lee, Seunghan; Lee, Jun-Young; Ha, KiRyong

doi:10.1007/s11814-014-0302-1

Cited by 5 publications

(4 citation statements)

References 24 publications

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“…The rough surface helps to enhance cementation between MPCM‐1, MPCM‐2, and hydration products of cement; the fluidity of cement slurry was also improved by the spherical structure . Moreover, when the MPCM‐1 and MPCM‐2 were added into cement slurry, the MPCM‐1 and MPCM‐2 are required to be uniformly in cement slurry . Fortunately, it was shown that there is no adhesion between the MPCM‐1 or MPCM‐2 particles (Figures B and B).…”

Section: Resultsmentioning

confidence: 99%

“…28 Moreover, when the MPCM-1 and MPCM-2 were added into cement slurry, the MPCM-1 and MPCM-2 are required to be uniformly in cement slurry. 29 Fortunately, it was shown that there is no adhesion between the MPCM-1 or MPCM-2 particles (Figures 13B and 14B). Thus, the MPCM-1 and MPCM-2 were used to control the heat evolution of cement slurry.…”

Section: Surface Morphology Analysismentioning

confidence: 95%

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Fly ash and slag cement slurry containing microencapsulated phase change materials: Characterization and application

Huo

Feng

2019

Int J Energy Res

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Summary Based on the low hydration heat and temperature rise requirements of cement slurry used in natural gas hydrate layer, two novel microencapsulated phase change materials (MPCM‐1 and MPCM‐2) with different melting point were designed and synthesized; then, the heat evolution of cement slurry was controlled by MPCM‐1 and MPCM‐2 through physical means; the decomposition of hydrates was avoided. Before synthesizing MPCM‐1 and MPCM‐2, the micromorphology, particle size, and distribution of paraffin wax emulsion were studied. Then, the MPCM‐1 and MPCM‐2 containing paraffin wax with urea formaldehyde resin shell was synthesized by in situ polymerization, and the chemical structure and performances were investigated. The melting point of MPCM‐1 and MPCM‐1 is 23.09°C and 35.85°C; the phase change enthalpy is 97.49 and 85.69 J/g. The MPCM‐1 and MPCM‐2 were added into cement slurry, and the controlling effects on heat evolution were studied. As a result, it was found that the hydration heat and temperature rise of cement slurry were successfully reduced by using MCPM‐1 and MPCM‐2. Simultaneously, the investigations of fly ash and slag cement slurry were accomplished. Moreover, the fly ash and slag cement slurry containing microencapsulated phase change materials was prepared. It was shown that the 24 and 48‐hour hydration heat were reduced by 1.10 × 105 and 10.5 × 105 J, respectively.

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Section: Resultsmentioning

confidence: 99%

Section: Surface Morphology Analysismentioning

confidence: 95%

Fly ash and slag cement slurry containing microencapsulated phase change materials: Characterization and application

Huo

Feng

2019

Int J Energy Res

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“…For traditional cement‐based materials, such as fly ash and slag, it was found that the use of fly ash and slag obviously reduced the temperature profiles of cement slurry system. Fly ash and slag are low hydration heat cement‐based materials; thus, the temperature profiles could be obviously reduced by replacing some oil well cement by fly ash or slag . However, the mechanical strength of cement stone was greatly weakened by a large adding amount of fly ash or slag, which is shown in Figure .…”

Section: Resultsmentioning

confidence: 99%

“…Fly ash and slag are low hydration heat cement-based materials; thus, the temperature profiles could be obviously reduced by replacing some oil well cement by fly ash or slag. 21 However, the mechanical strength of cement stone was greatly weakened by a large adding amount of fly ash or slag, which is shown in Figure 13. Furthermore, a large adding amount of fly ash or slag has great negative influences on the application properties of cement slurry system, such as fluidity, initial setting time, and thickening property.…”

Section: Controlling Effects Of Different Materials On Heat Evolutionmentioning

confidence: 99%

Controlling the heat evolution of cement slurry system using microencapsulated phase change materials

et al. 2018

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Summary Based on the low hydration heat demand of cement slurry system used in deep water cementing, novel materials, namely, microencapsulated phase change materials (MPCMs), were synthesized and used to control the heat evolution of cement slurry by physical means. Here, the temperature profiles and hydration heat of cement slurry system were tested by using the developed semiadiabatic test apparatus. Firstly, the MPCM containing low melting paraffin wax with urea formaldehyde resin shell was synthesized by in situ polymerization. Then the properties of MPCM, such as structure, encapsulation efficiency, acid and alkali corrosion resistance, phase change properties, and thermal stability, were characterized by a series of methods. As a result, it was confirmed that the MPCM could be introduced and used to control the heat evolution of cement slurry system. Secondly, the synthesized MPCM was introduced into cement slurry system to control the heat evolution, and an intelligent cement slurry system, which could be used in the cementing of gas hydrate formation, was prepared. The highlight of current study is that the heat evolution of cement slurry system was successfully controlled by the synthesized MPCM through physical means. Besides, this study provides some guidance for the research and development of deep water oil and gas resources.

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Preparation and application of novel microcapsules ruptured by microwave for self-healing concrete

Liu

Cao

et al. 2021

Construction and Building Materials

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Application of cross-linked poly(acrylic acid)-poly(styrene-alt-maleic anhydride) core-shell microcapsule absorbents in cement mortars

Cited by 5 publications

References 24 publications

Fly ash and slag cement slurry containing microencapsulated phase change materials: Characterization and application

Fly ash and slag cement slurry containing microencapsulated phase change materials: Characterization and application

Controlling the heat evolution of cement slurry system using microencapsulated phase change materials

Preparation and application of novel microcapsules ruptured by microwave for self-healing concrete

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