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观察到表面活性的、接枝了甲氧基聚乙二醇的二氧化硅纳米颗粒出现浑浊现象。

Clouding observed for surface active, mPEG-grafted silica nanoparticles.

作者信息

Björkegren Sanna, Nordstierna Lars, Sundblom Andreas, Palmqvist Anders

机构信息

Department of Chemistry and Chemical Engineering, Chalmers University of Technology SE-412 96 Göteborg Sweden.

Nouryon SE-445 80 Bohus Sweden

出版信息

RSC Adv. 2019 Apr 30;9(23):13297-13303. doi: 10.1039/c9ra00361d. eCollection 2019 Apr 25.

DOI:10.1039/c9ra00361d
PMID:35520810
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9064042/
Abstract

Temperature-dependent phase-separation, clouding, has been observed in suspensions of silica nanoparticles surface-functionalized with methyl-poly(ethylene glycol) silane. Interparticle interactions and conformational changes of the grafted poly(ethylene glycol) chains influence the observed cloud points, and can be controlled by electrolyte concentration and pH. These findings open new routes to tailoring properties of Pickering emulsions.

摘要

在由甲基聚（乙二醇）硅烷进行表面功能化的二氧化硅纳米颗粒悬浮液中，已观察到与温度相关的相分离现象，即浑浊现象。颗粒间相互作用以及接枝的聚（乙二醇）链的构象变化会影响所观察到的浊点，并且可以通过电解质浓度和pH值来控制。这些发现为定制皮克林乳液的性能开辟了新途径。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a89b/9064042/32430ce158b3/c9ra00361d-f6.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a89b/9064042/0bf1312674d7/c9ra00361d-f1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a89b/9064042/d3aff001de6d/c9ra00361d-f2.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a89b/9064042/211d5363a762/c9ra00361d-f3.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a89b/9064042/6f220723faa1/c9ra00361d-f4.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a89b/9064042/423801795ba3/c9ra00361d-f5.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a89b/9064042/32430ce158b3/c9ra00361d-f6.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a89b/9064042/0bf1312674d7/c9ra00361d-f1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a89b/9064042/d3aff001de6d/c9ra00361d-f2.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a89b/9064042/211d5363a762/c9ra00361d-f3.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a89b/9064042/6f220723faa1/c9ra00361d-f4.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a89b/9064042/423801795ba3/c9ra00361d-f5.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a89b/9064042/32430ce158b3/c9ra00361d-f6.jpg

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Surface activity and flocculation behavior of polyethylene glycol-functionalized silica nanoparticles.聚乙二醇功能化二氧化硅纳米颗粒的表面活性和絮凝行为
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