Aerogel precursor and aerogel prepared using the same
AssigneeLG Chem, Ltd.
InventorsHee Jung Choi, Kyoung Shil Oh, Yeong Rae Chang, Je Kyun Lee
Life of this patent
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Abstract
The present disclosure provides an aerogel precursor including an alkoxydisiloxane-based prepolymer and having a functional group derived from a hydrophobic sol-gel forming agent of the following Chemical Formula 1 on a surface thereof, and therefore, capable of enhancing high temperature thermal stability of an aerogel providing hydrophobic pores having uniform pore size distribution when preparing an aerogel, and an aerogel prepared using the same: (in Chemical Formula 1, M, R, R1 to R4 are the same as defined in the specification.)
Claims14
An aerogel precursor comprising an alkoxydisiloxane-based prepolymer, and having a functional group derived from a hydrophobic sol-gel forming agent of the following Chemical Formula 2 on a surface thereof:
- wherein:
- M11 is any one selected from the group consisting of group 4 elements and group 14 elements;
- R11 is a halogen group;
- R12 and R13 each independently is selected from the group consisting of an alkyl group having 1 to 20 carbon atoms, an alkenyl group having 2 to 20 carbon atoms, an alkynyl group having 2 to 20 carbon atoms, a cycloalkyl group having 3 to 20 carbon atoms, an aryl group having 6 to 20 carbon atoms, an arylalkyl group having 7 to 20 carbon atoms and an alkylaryl group having 7 to 20 carbon atoms;
- and
- R14 is selected from the group consisting of an alkyl group having 2 to 20 carbon atoms, an alkenyl group having 2 to 20 carbon atoms, an alkynyl group having 2 to 20 carbon atoms, a cycloalkyl group having 3 to 20 carbon atoms, an aryl group having 6 to 20 carbon atoms, an arylalkyl group having 7 to 20 carbon atoms and an alkylaryl group having 7 to 20 carbon atoms,
- wherein the alkoxydisiloxane-based prepolymer has a degree of hydrolysis of 50% to 85%, and
- the alkoxydisiloxane-based prepolymer includes an alkoxydisiloxane-derived repeating unit having a molecular weight of 60 Da to 140 Da and a molecular weight distribution with an m/z (ratio of mass to charge) value of 620 to 1,800 when analyzing the mass by MALDI-TOF.
An aerogel precursor comprising an alkoxydisiloxane-based prepolymer, and having a functional group derived from a hydrophobic sol-gel forming agent of the following Chemical Formula 3 on a surface thereof, wherein the hydrophobic sol-gel forming agent includes a compound of the following Chemical Formula 3:
- wherein, in Chemical Formula 3,
- M21 is Ti or Zr;
- and
- R21 to R24 are each independently a hydrophobic functional group selected from the group consisting of an alkyl group having 1 to 10 carbon atoms, a cycloalkyl group having 3 to 12 carbon atoms, an aryl group having 6 to 12 carbon atoms, an arylalkyl group having 7 to 13 carbon atoms, an alkylaryl group having 7 to 13 carbon atoms;
- or a functional group reactive with the alkoxydisiloxane-based prepolymer that is a halogen group or an alkoxy group having 1 to 10 carbon atoms, however, R21 to R24 are not a hydrophobic functional group or a functional group reactive with the alkoxydisiloxane-based prepolymer at the same time,
- wherein the alkoxydisiloxane-based prepolymer has a degree of hydrolysis of 50% to 85%, and
- the alkoxydisiloxane-based prepolymer includes an alkoxydisiloxane-derived repeating unit having a molecular weight of 60 Da to 140 Da and a molecular weight distribution with an m/z (ratio of mass to charge) value of 620 to 1,800 when analyzing the mass by MALDI-TOF.
An aerogel precursor comprising an alkoxydisiloxane-based prepolymer, and having a functional group derived from a hydrophobic sol-gel forming agent of the following Chemical Formula 2 on a surface thereof:
- wherein:
- M11 is any one selected from the group consisting of group 4 elements and group 14 elements;
- R11 is a halogen group;
- R12 and R13 each independently is selected from the group consisting of an alkyl group having 1 to 20 carbon atoms, an alkenyl group having 2 to 20 carbon atoms, an alkynyl group having 2 to 20 carbon atoms, a cycloalkyl group having 3 to 20 carbon atoms, an aryl group having 6 to 20 carbon atoms, an arylalkyl group having 7 to 20 carbon atoms and an alkylaryl group having 7 to 20 carbon atoms;
- and
- R14 is selected from the group consisting of an alkyl group having 2 to 20 carbon atoms, an alkenyl group having 2 to 20 carbon atoms, an alkynyl group having 2 to 20 carbon atoms, a cycloalkyl group having 3 to 20 carbon atoms, an aryl group having 6 to 20 carbon atoms, an arylalkyl group having 7 to 20 carbon atoms and an alkylaryl group having 7 to 20 carbon atoms,
- wherein the alkoxydisiloxane-based prepolymer has a degree of hydrolysis of 50% to 85%, and
- the alkoxydisiloxane-based prepolymer includes an alkoxydisiloxane-derived repeating unit having a molecular weight of 60 Da to 140 Da and
- the alkoxydisiloxane-based prepolymer has a molecular weight distribution with an m/z (ratio of mass to charge) value of 650 to 3,000 when analyzing the mass by MALDI-TOF.
Dependencies are inferred from the claim text.