Structural analysis of embedding polyethylene glycol in silica aerogel

Yang, Kai; Venkataraman, Mohanapriya; Karpíšková, Jana; Suzuki, Yoshiyuki; Ullah, Sana; Militký, Jiřı́; Wang, Yuanfeng; Yang, Tao; Wiener, Jakub; Zhu, Guocheng; Yao, Juming

doi:10.1016/j.micromeso.2020.110636

Cited by 31 publications

(23 citation statements)

References 31 publications

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“…The interplanar spacing of the (112) crystal plane encapsulated by dickite powders was correspondingly reduced. Therefore, it is believed that the molecular chain of PEG was restricted by dickite . On the contrary, this characteristic peak of PEG in PEG/HAP was not shifted so that HAP did not restrict the molecular chain of PEG.…”

Section: Resultsmentioning

confidence: 98%

“…The PEG monolayer mainly existed on the surface of HAP. The pores of different pore sizes are selective for PEG of different molecular sizes . Therefore, the cubic closest packing was selected as the packing method in this model.…”

Section: Resultsmentioning

confidence: 99%

“…The pores of different pore sizes are selective for PEG of different molecular sizes. 41 Therefore, the cubic closest packing was selected as the packing method in this model. The size of the mesopores formed by this accumulation can adsorb the stacked PEG.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

“…Therefore, it is believed that the molecular chain of PEG was restricted by dickite. 41 On the contrary, this characteristic peak of PEG in PEG/HAP was not shifted so that HAP did not restrict the molecular chain of PEG. Moreover, the position of characteristic peaks about ss-CPCMs did not change compared with the original materials.…”

Section: ■ Introductionmentioning

confidence: 98%

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Surface Adsorption in PEG/Hydroxyapatite and PEG/Dickite Composite Phase Change Materials

et al. 2021

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The traditional view is that the pore structure of substrate determines the encapsulation ratio. The work proposed that surface adsorption was also a cause in this method. Polyethylene glycol/hydroxyapatite (PEG/HAP) and polyethylene glycol/dickite (PEG/D) were prepared by encapsulating polyethylene glycol (PEG) with hydroxyapatite (HAP) and dickite as substrates. The pore structures of HAP and dickite were characterized by BET and mercury intrusion porosimetry, respectively. Through SEM, XPS, FT-IR, and XRD, the process of PEG being encapsulated by the two materials was studied. The leakage cycle test was performed on PEG/HAP. The experiments proved that HAP adsorbed PEG through the surface and the surface adsorption played an essential role in the direct impregnation process. According to the distribution of PEG among HAP particles and the adsorption mechanism of HAP, a model was created to describe the encapsulation ratio in the direct impregnation process. The maximum encapsulation ratio of PEG/HAP calculated by this model is 75.98%, which is close to the actual value (74.66%).

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Section: Resultsmentioning

confidence: 98%

Section: Resultsmentioning

confidence: 99%

Section: ■ Results and Discussionmentioning

confidence: 99%

Section: ■ Introductionmentioning

confidence: 98%

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Surface Adsorption in PEG/Hydroxyapatite and PEG/Dickite Composite Phase Change Materials

et al. 2021

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“…The difference in ΔH m of 2.5-6.5 J•g -1 between the MPLA/SA composites and PLA/SA analogs was related to the condensation reaction. For both PLA/SA and MPLA/SA composites, increasing SA content resulted in decreasing ΔH m (Table 3) [42]. However, the PLA/SA cases displayed a larger ΔH m decrement, which indicated lower crystallinity.…”

Section: 3mentioning

confidence: 95%