Preparation and characterization of metal-organic framework /microencapsulated phase change material composites for indoor hygrothermal control

Hou, Pumin; Qin, Menghao; Cui, Shuqing; Zu, Kan

doi:10.1016/j.jobe.2020.101345

Cited by 21 publications

(13 citation statements)

References 35 publications

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“…Typically, one way was employed to prepare the multi-functional MEPCMs, for instance, the functional NPs ferric oxide (Fe 2 O 3 ), titanium dioxide (TiO 2 ), zinc oxide (ZnO), metal–organic frameworks (MOFs), and were embedded into the polymeric shell, or the functional inorganic shells like TiO 2 , cuprous oxide (Cu 2 O), tin dioxide (SnO 2 ), and cadmium sulfide (CdS) were directly used for the shell to achieve the UV shielding, fluorescent, photothermal conversion, photocatalysis, antibacterial, and thermal conduction, etc. [ 20 , 21 , 22 , 23 , 24 , 25 , 26 , 27 , 28 ]. In our previous work [ 29 ], a kind of MEPCM with TiO 2 /PDVB hybrid shell was fabricated by Pickering emulsion polymerization; nevertheless, the use efficiency of single functional TiO 2 NPs in the MEPCM is relatively low, nonfunctional PDVB shell could not achieve a synergetic combination of NPs and shell for further improving the multi-functionality especially the photocatalysis.…”

Section: Introductionmentioning

confidence: 99%

Bi-Functional Paraffin@Polyaniline/TiO2/PCN-222(Fe) Microcapsules for Solar Thermal Energy Storage and CO2 Photoreduction

2021

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A novel type of bi-functional microencapsulated phase change material (MEPCM) microcapsules with thermal energy storage (TES) and carbon dioxide (CO2) photoreduction was designed and fabricated. The polyaniline (PANI)/titanium dioxide (TiO2)/PCN-222(Fe) hybrid shell encloses phase change material (PCM) paraffin by the facile and environment-friendly Pickering emulsion polymerization, in which TiO2 and PCN-222(Fe) nanoparticles (NPs) were used as Pickering stabilizer. Furthermore, a ternary heterojunction of PANI/(TiO2)/PCN-222(Fe) was constructed due to the tight contact of the three components on the hybrid shell. The results indicate that the maximum enthalpy of MEPCMs is 174.7 J·g−1 with encapsulation efficiency of 77.2%, and the thermal properties, chemical composition, and morphological structure were well maintained after 500 high–low temperature cycles test. Besides, the MEPCM was employed to reduce CO2 into carbon monoxide (CO) and methane (CH4) under natural light irradiation. The CO evolution rate reached up to 45.16 μmol g−1 h−1 because of the suitable band gap and efficient charge migration efficiency, which is 5.4, 11, and 62 times higher than pure PCN-222(Fe), PANI, and TiO2, respectively. Moreover, the CO evolution rate decayed inapparently after five CO2 photoreduction cycles. The as-prepared bi-functional MEPCM as the temperature regulating building materials and air purification medium will stimulate a potential application.

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Section: Introductionmentioning

confidence: 99%

Bi-Functional Paraffin@Polyaniline/TiO2/PCN-222(Fe) Microcapsules for Solar Thermal Energy Storage and CO2 Photoreduction

2021

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“…Despite the importance of the water vapor hysteresis for moisture buffering, this effect was not described in detail in the similar works of Yang et al [57] or Vieira et al [58], despite its crucial impact on plasters' functionalization. As reported by Hou et al [59], the water vapor hysteresis needs to be taken into account within the assessment of moisture-buffering materials. The criterion of highly saturated moisture content for indoor humidity control was confirmed by Chen et al [47].…”

Section: Resultsmentioning

confidence: 99%

Characterization of Responsive Plasters for Passive Moisture and Temperature Control

et al. 2020

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Ambient comfort maintenance accompanied by excessive energy consumption is hugely criticized concerning the limited sustainability of the building sector in the long-term. In this sense, the energy reduction strategies based on the employment of passive air-control techniques are viewed as a prospective solution for improved energy performance. In order to contribute to this significant issue, this paper is aimed at the design and material characterization of novel plaster with an improved thermal and humidity control performance. For this purpose, a form-stable diatomite/dodecanol-based phase change material together with superabsorbent polymer are used as admixtures for the passive moderation of indoor air quality by newly designed modified plasters. The experimental assessment of the functional properties by means of mechanical strength, thermal conductivity, and hygric properties is performed. Considering the goal of the paper, particular attention is paid to the characterization of water vapor storage and moisture buffering according to the Nordtest method. Differential scanning calorimetry is employed for the description of phase change intervals as well as the specific enthalpy of phase change. The obtained results point to significant improvements in the hygroscopic performance and increased thermal energy storage that can be used for passive moderation of the indoor temperature and reduction of the relative humidity swings.

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“…Here, we synthesis MIL-100(Fe) hydrothermally from metal Fe 3+ ions and trimesic acid. MIL-100(Fe) shows great ability to adsorb moisture from air and can be obtained easily through large-scale synthesis [30][31][32], making it one of the best choices for humidity pump.…”

Section: Humidity Properties Of Mil-100(fe)mentioning

confidence: 99%

A novel metal-organic frameworks based humidity pump for indoor moisture control

Hou

Qin

et al. 2021

Building and Environment

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Preparation and characterization of metal-organic framework /microencapsulated phase change material composites for indoor hygrothermal control

Cited by 21 publications

References 35 publications

Bi-Functional Paraffin@Polyaniline/TiO2/PCN-222(Fe) Microcapsules for Solar Thermal Energy Storage and CO2 Photoreduction

Bi-Functional Paraffin@Polyaniline/TiO2/PCN-222(Fe) Microcapsules for Solar Thermal Energy Storage and CO2 Photoreduction

Characterization of Responsive Plasters for Passive Moisture and Temperature Control

A novel metal-organic frameworks based humidity pump for indoor moisture control

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