Design and characterization of silicone micromaterials: a systematic study
PBN-AR
Instytucja
Akademickie Centrum Materiałów i Nanotechnologii (Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie)
Informacje podstawowe
Główny język publikacji
EN
Czasopismo
Materials & Design (35pkt w roku publikacji)
ISSN
0261-3069
EISSN
1873-4197
Wydawca
Elsevier Science Ltd.
DOI
Rok publikacji
2018
Numer zeszytu
Strony od-do
57--68
Numer tomu
146
Link do pełnego tekstu
Identyfikator DOI
Liczba arkuszy
0.85
Autorzy
(liczba autorów: 8)
Pozostali autorzy
+ 7
Słowa kluczowe
EN
porosity
microstructures
morphology
sol-gel processes
silicone
microelastic modulus
Streszczenia
Język
EN
Treść
Silicone micromaterials were synthesized using two surfactant-free methods: the Stober synthesis or solidification in spontaneously formed emulsions (the Ouzo effect) and their physicochemical properties were evaluated. The effect of the chemical structure of a silicone precursor on the morphology of formed microstructures was considered. For that purpose, various organosilicon compounds containing in their structure T-units and D-units, methyl groups, ethylene linkages, and cyclotetrasiloxane rings were used as silicone precursors. All materials existed as sub-micron sized particles, although they differed considerably in morphology and dispersity (spherical particles with a diameter of about 490 and 740 nm, cauliflower-like structures, large rough-surfaced aggregates). The chemical composition of the microstructure surface was examined using XPS. The porosity of silicone materials was assessed on the basis of nitrogen adsorption isotherms. The specific surface area (S-BET) varied substantially and ranged from 5 to 379 m(2)/g. For the first time the microelastic modulus of the silicone materials was determined using AFM measurements. We found that the structure of the organic part had a large impact on the microelasticity of the material. The microelastic modulus of the silicone materials (11-33 GPa) was significantly lower compared to silica (59 GPa).
Cechy publikacji
original article
peer-reviewed
Inne
System-identifier
idp:113856
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