Synthesis of dual stimuli-responsive amphiphilic particles through controlled semi-batch emulsion polymerization

Yam, Chun Ho; Lee, Cheng Hao; Siu, Yuen Shan; Ho, Kin Man; Li, Pei

doi:10.1016/j.polymer.2016.08.092

Cited by 6 publications

(1 citation statement)

References 27 publications

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“…The second organization level (aggregates of nanocrystals) has the highest dependence on the co-precipitation temperature, since the aggregate formation is mainly a result of aggregation of the initial hydroxide particles immediately after co-precipitation. The process of aggregation of hydroxide particles is higher, the lower the absolute value of the charge of their surface, which, as it is well-known, has a non-monotonic temperature dependence [30]. That is why for the 25 • C co-precipitation temperature, with apparently minimal surface charge, the average aggregate size is the highest in the GFO-series.…”

Section: The Impact Of Co-precipitation Temperature On the Aggregation/agglomeration Of Gdfeo 3 Nanocrystalsmentioning

confidence: 95%

The effect of co-precipitation temperature on the crystallite size and aggregation/agglomeration of GdFeO3 nanoparticles

Попков¹,

Albadi²

2021

Nanosystems: Phys. Chem. Math.

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In this work, a series of GdFeO 3 nanopowders was successfully synthesized via a reverse co-precipitation technique at different solution temperatures (0, 25 and 50 • C) followed by thermal treatment. Co-precipitated hydroxides and heat treatment products were analyzed using EDXS, DTA-TGA, PXRD, ASA and LD methods. It was shown that the formation temperature of GdFeO 3 nanoparticles varies in the range of 737.5-758.8 • C and total weight loss varies in the range of 23.6-26.4% depending on the temperature of initial solutions. The specific surface areas of nanopowders were found to be strongly dependent on the factor mentioned above and belong to 2.5-16.3 m 2 /g values interval. The hierarchical structure of the obtained nanopowders was established and the effect of co-precipitation temperature on the average crystallite (21.4-34.3 nm), aggregate (46.2-301.2 nm) and agglomerate (33.5-40.9 µm) sizes was discussed in detail.

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Section: The Impact Of Co-precipitation Temperature On the Aggregation/agglomeration Of Gdfeo 3 Nanocrystalsmentioning

confidence: 95%