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231225s2021 xx |||||o 00| ||eng c |
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|a 10.1021/acs.langmuir.1c00097
|2 doi
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|a pubmed25n1086.xml
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|a (NLM)34042453
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|a DE-627
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|e rakwb
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|a eng
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| 100 |
1 |
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|a Ren, Gaihuan
|e verfasserin
|4 aut
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| 245 |
1 |
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|a Dynamic Covalent Nanoparticles for Acid-Responsive Nonaqueous Pickering Emulsions
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|c 2021
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| 336 |
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
|b c
|2 rdamedia
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|a ƒa Online-Ressource
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|a Date Revised 08.06.2021
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|a published: Print-Electronic
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|a Citation Status PubMed-not-MEDLINE
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|a Acid-responsive nonaqueous (glycerol in n-decane) Pickering emulsions were prepared using preferentially oil-wetted dynamic covalent silica (SiO2-pDB) nanoparticles as the Pickering emulsifiers. The acid-responsive Pickering emulsifier SiO2-pDB was prepared based on a Schiff base reaction between amino silica (SiO2-NH2) and p-decanoxybenzaldehyde (pDBA). The formation of SiO2-pDB was characterized by Fourier transform infrared spectroscopy, thermogravimetric analysis, and elemental analysis. The preferentially oil-wetted character of SiO2-pDB was indicated by contact angle measurement. Stable nonaqueous Pickering emulsions were prepared using preferentially oil-wetted SiO2-pDB as the Pickering emulsifier. However, after adjusting the nonaqueous Pickering emulsions to an acidic environment, complete phase separation occurred. In the acidic environment, preferentially oil-wetted SiO2-pDB decomposed into hydrophilic SiO2-NH2 and hydrophobic pDBA due to the decomposition of the dynamic imine bond in the SiO2-pDB. Then, the hydrophilic SiO2-NH2 and hydrophobic pDBA desorbed from the two-phase interface, resulting in complete phase separation of the initially stable nonaqueous Pickering emulsions. The acid-responsive nonaqueous Pickering emulsions show great potential in application in water sensitive systems, such as oil-based drilling fluids
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|a Journal Article
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1 |
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|a Li, Bo
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Ren, Lulu
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Di, Wenwen
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Tian, Lulu
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Zhang, Pan
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Shao, Weili
|e verfasserin
|4 aut
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| 700 |
1 |
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|a He, Jianxin
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Sun, Dejun
|e verfasserin
|4 aut
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| 773 |
0 |
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|i Enthalten in
|t Langmuir : the ACS journal of surfaces and colloids
|d 1985
|g 37(2021), 22 vom: 08. Juni, Seite 6632-6640
|w (DE-627)NLM098181009
|x 1520-5827
|7 nnas
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| 773 |
1 |
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|g volume:37
|g year:2021
|g number:22
|g day:08
|g month:06
|g pages:6632-6640
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|u http://dx.doi.org/10.1021/acs.langmuir.1c00097
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