Disclosed a preparation method of a green, biodegradable, and multifunctional collagen-based nanocomposite film, and overcomes the problems of difficult biodegradation, poor barrier property, and single function of food packaging materials in the existing technologies. The present invention includes the following steps: adding silicate nanosheet into deionized water for ultrasonic dispersion; then adding polyphenolic acid into the mixture, wherein a mass ratio of the polyphenolic acid to the silicate nanosheet is 1:(0.2˜1); and adjusting the pH value to 3.0˜4.0 to obtain a solution A; adding collagen with a concentration of 5 g/L into an acetic acid solution, and fully dissolving the collagen to obtain a solution B; isovolumetrically mixing the solution A with the solution B, stirring at room temperature, and adjusting the pH value to 4.5˜5.5 to obtain a casting solution; and pouring the casting solution into a polytetrafluoroethylene mold, and naturally drying to obtain a nanocomposite film.

A composite polyester hot-melt adhesive, a preparation method thereof and a preparation method of an anti-scouring geotextile are provided. The preparation method of the composite polyester hot-melt adhesive includes the following steps: performing an esterification reaction on a dibasic acid and a dihydric alcohol under a protection of nitrogen and an action of a titanium/cobalt composite catalyst, adding a stabilizer for a polycondensation reaction to obtain a polyester hot-melt adhesive, then adding polymethyl methacrylate (PMMA) microspheres for mixing and stirring to obtain the composite polyester hot-melt adhesive. The anti-scouring geotextile is obtained by bonding a polyethylene terephthalate woven fabric with a polypropylene geotextile by the composite polyester hot-melt adhesive. The composite polyester hot-melt adhesive has the advantages of high bonding strength and good anti-impact performance, and the prepared anti-scouring geotextile has the advantages of high anti-scouring strength, good soil conservation performance, strong protection capability and long service life.

A composite polyester hot-melt adhesive, a preparation method thereof and a preparation method of an anti-scouring geotextile are provided. The preparation method of the composite polyester hot-melt adhesive includes the following steps: performing an esterification reaction on a dibasic acid and a dihydric alcohol under a protection of nitrogen and an action of a titanium/cobalt composite catalyst, adding a stabilizer for a polycondensation reaction to obtain a polyester hot-melt adhesive, then adding polymethyl methacrylate (PMMA) microspheres for mixing and stirring to obtain the composite polyester hot-melt adhesive. The anti-scouring geotextile is obtained by bonding a polyethylene terephthalate woven fabric with a polypropylene geotextile by the composite polyester hot-melt adhesive. The composite polyester hot-melt adhesive has the advantages of high bonding strength and good anti-impact performance, and the prepared anti-scouring geotextile has the advantages of high anti-scouring strength, good soil conservation performance, strong protection capability and long service life.

There is provided a protective film agent with which a workpiece is coated when the workpiece is processed. The protective film agent includes a water-soluble resin, a light absorbing agent having a flavone structure, a flavonol structure, or an isoflavone structure, and a solvent that dissolves the resin and the light absorbing agent.

There is provided a protective film agent with which a workpiece is coated when the workpiece is processed. The protective film agent includes a water-soluble resin, a light absorbing agent having a flavone structure, a flavonol structure, or an isoflavone structure, and a solvent that dissolves the resin and the light absorbing agent.

The present invention relates to a homogeneous liquid/fluid combination of photoinitiators with improved formulability, reactivity and surface curing performances, more particularly to novel combinations of acylphosphine oxides and ketocoumarins, optionally further combined with at least one co-initiator.

The present invention relates to a homogeneous liquid/fluid combination of photoinitiators with improved formulability, reactivity and surface curing performances, more particularly to novel combinations of acylphosphine oxides and ketocoumarins, optionally further combined with at least one co-initiator.

Described are polymerizable high energy light absorbing compounds. The compounds absorb various wavelengths of ultraviolet and/or high energy visible light and are suitable for incorporation in various products, such as biomedical devices and ophthalmic devices. Such devices exhibit a number of desirable properties, including favorable vision break-up times.

Described are polymerizable high energy light absorbing compounds. The compounds absorb various wavelengths of ultraviolet and/or high energy visible light and are suitable for incorporation in various products, such as biomedical devices and ophthalmic devices.

Described are polymerizable high energy light absorbing compounds. The compounds absorb various wavelengths of ultraviolet and/or high energy visible light and are suitable for incorporation in various products, such as biomedical devices and ophthalmic devices. Such devices exhibit a number of desirable properties, including favorable rates of pervaporation.