US 10,329,332 B2 · Spider silk protein film, and method for producing same

Abstract

A film of the present invention contains a polypeptide derived from spider silk proteins. The decomposition temperature of the film is 240 to 260° C. The film absorbs ultraviolet light having a wavelength of 200 to 300 nm and has a light transmittance of 85% or more at a wavelength of 400 to 780 nm. The film is transparent and colorless in a visible light region. A method for producing a film of the present invention includes: dissolving a polypeptide derived from spider silk proteins in a dimethyl sulfoxide solvent to prepare a dope; and cast-molding the dope on a surface of a base. Thus, the present invention provides a spider silk protein film that can be formed easily and has favorable stretchability, and a method for producing the same.

Claims10

Dependent claims

A spider silk protein film comprising a polypeptide derived from spider silk proteins,

wherein the spider silk protein film contains dimethyl sulfoxide in an amount from 0.05% to 11.2% by mass,
begins decomposition at between 240 to 260° C.,
the film absorbs ultraviolet light having a wavelength of 200 to 300 nm and has a light transmittance of 85% or more at a wavelength of 400 to 780 nm,
the film is transparent and colorless in a visible light region,
the dimethyl sulfoxide is a plasticizer, and
when the spider silk protein film is uniaxially-stretched or biaxially-stretched, the film has a maximum stress of 40 MPa to 100 MPa and a displacement at rupture point (strain) of 10 to 50%.

3 more elements

Dependencies are inferred from the claim text.

Spider silk protein film, and method for producing same

Life of this patent

Spider silk protein film, and method for producing same

Life of this patent

Abstract

Claims10