Block copolymer, multilayered structure, solid polymer membrane, fuel cell, method for producing multilayered structure, and method for producing multilayered structure including inorganic nanoparticles

#This patent application is a U.S. national stage application under 35 U.S.C. § 371 of International Patent Application No. PCT/JP2017/027793 filed on Aug. 1, 2017, which claims the benefit of foreign priority to Japanese Patent Application No. JP 2016-154294 filed on Aug. 5, 2016. The International Application was published in Japanese on Feb. 8, 2018, as International Publication No. WO 2018/025828 A1 under PCT Article 21(2).

#This patent application contains subject matter that was previously disclosed by the inventor in an electronic publication on Feb. 9, 2016, titled “Silver Nanoparticle Arrays Prepared by In Situ Automatic Reduction of Silver Ions in Mussel-Inspired Block Copolymer Films,” in Macromolecular Chemistry and Physics, 2016, 217, 726-734, DOI: 10.1002/macp.201500504, made available at http://onlinelibrary.wiley.com/doi/10.1002/macp.201500504/asbtract.

#The present invention relates to a block copolymer, a multilayered structure, a solid polymer membrane, a fuel cells, a method for producing a multilayered structure, and a method for producing a multilayered structure including inorganic nanoparticles.

#FIG. 1 shows the NMR measurement results of a block copolymer synthesized in Example 1;

#FIG. 2 shows the GPC chart of a triblock copolymer synthesized in Example 2;

#FIG. 3 shows the NMR measurement results before deprotection of a triblock copolymer synthesized in Example 2;

#The block copolymer, multilayered structure, solid polymer membrane, fuel cell, method for producing a multilayered structure, and method for producing a multilayered structure including inorganic nanoparticles of the present invention are described more specifically below.

#The block copolymer of the present invention includes a hydrophilic segment including a catechol group, a hydrophobic segment including a more hydrophobic substitution than the hydrophilic segment including a catechol group, and, included if necessary, a hydrophilic segment including a functional group having an acid dissociation constant pKa of from 0.5 to 7, and is represented, for example, by formula (1) below.

#In the block copolymer represented by formula (1), R1 represents a C1-20 linear, branched, or cyclic alkyl group, C6-20 aryl group, or C7-20 aralkyl group. In the block copolymer, the t segment including R1 functions as a hydrophobic segment. Therefore, R1 may be relatively more hydrophobic than the catechol group of the hydrophilic segments (m segment and n segment) discussed below, but the number of carbon atoms in R1 is preferably 3 or more.