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US 11,266,968 B2Granted
Mineralizing biosurfactant used for nucleating silica
AssigneeThe University of Queensland
InventorsAnton Peter Jacob Middelberg, Chun-Xia Zhao, David Wibowo, Brenton Charles Peters
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Abstract
The present invention relates to emulsion-templated silica micro and nano-capsules- and methods for making them. In particular, the template emulsion is stabilized by a biosurfactant that also assists in nucleating the silica shell Mineralizing biosurfactants and stabilized micro- and nano-emulsions useful in forming the emulsion-templated micro- and nano-capsules, and methods for the use of the silica micro- and nano-capsules are also described.
Claims24
A mineralizing biosurfactant comprising:
- i) a surface-active polypeptide module at least 6 amino acid residues in length;
- and
- ii) a charged peptide module comprising the amino acid sequence of RKKRKKRKKRKKGGGY (SEQ ID NO:
- 132),
- wherein the surface-active polypeptide and the charged peptide modules are conjugated to one another;
- and
- wherein the surface-active polypeptide module comprises an amino acid sequence:
- (a b c d e f g)n
- wherein n is an integer from 2 to 12;
- amino acid residues a and d are hydrophobic amino acid residues;
- at least one of residues b and c and at least one of residues e and f are hydrophilic amino acid residues, and the other of amino acid residues b and c and e and f are any amino acid residue;
- and amino acid residue g is any amino acid residue;
- wherein the mineralizing biosurfactant is capable of nucleating silica on the surface of a stabilized micro- or nano-emulsion.
10 more elements
Dependencies are inferred from the claim text.