Are provided a novel organic-inorganic complex showing excellence in ultraviolet (UV) blocking effects, a manufacturing method thereof, and an UV blocking agents manufactured by using the same, and more specifically, there are provided a novel organic-inorganic complex capable of making up for the disadvantages of existing organic UV sunscreen materials and existing inorganic UV sunscreen materials, and increasing the advantages thereof, and a method of effectively manufacturing the organic-inorganic complex with a high yield of production, and an UV blocking agents manufactured by using the same.

A method for making an oil- and water-resistant nanocomposite material includes preparing F-doped TiO.sub.2 nanorods, dispersing the F-doped TiO.sub.2 nanorods into a transparent adhesive to obtain a nanocomposite adhesive, and treating a surface of the nanocomposite adhesive to roughen the surface and expose some of the F-doped TiO.sub.2 nanorods. A transparent nanocomposite material suitable for use as transparent packaging for example is thereby obtained. The present disclosure also provides the nanocomposite material, and an encapsulating structure using the nanocomposite material.

The present disclosure relates to 2-dimensional MXenes surface-modified with catechol derivatives, a method for preparing the same, MXene organic ink including the same, and use thereof (e.g. flexible electrodes, conducive cohesive/adhesive materials, electromagnetic wave-shielding materials, flexible heaters, sensors, energy storage devices). Particularly, the simple, fast, and scalable surface-functionalization process of MXenes using catechol derivatives (e.g. ADOPA) organic ligands significantly improves the dispersion stability in various organic solvents (including ethanol, isopropyl alcohol, acetone and acetonitrile) and produces highly concentrated organic liquid crystals of various MXenes (including Ti.sub.2CT.sub.x, Nb.sub.2CT.sub.x, V.sub.2CT.sub.x, Mo.sub.2CT.sub.x, Ti.sub.3C.sub.2T.sub.x, Ti.sub.3CNT.sub.x, Mo.sub.2TiC.sub.2T.sub.x, and Mo.sub.2Ti.sub.2C.sub.3T.sub.x). Such products offer excellent electrical conductivity, improved oxidation stability, excellent coating and adhesion abilities to various hydrophobic substrates, and composite processability with hydrophobic polymers. This finding will lead to further studies on the structures, properties, and physics of the organic MXene liquid crystals and their practical applications.

The present disclosure relates to 2-dimensional MXenes surface-modified with catechol derivatives, a method for preparing the same, MXene organic ink including the same, and use thereof (e.g. flexible electrodes, conducive cohesive/adhesive materials, electromagnetic wave-shielding materials, flexible heaters, sensors, energy storage devices). Particularly, the simple, fast, and scalable surface-functionalization process of MXenes using catechol derivatives (e.g. ADOPA) organic ligands significantly improves the dispersion stability in various organic solvents (including ethanol, isopropyl alcohol, acetone and acetonitrile) and produces highly concentrated organic liquid crystals of various MXenes (including Ti.sub.2CT.sub.x, Nb.sub.2CT.sub.x, V.sub.2CT.sub.x, Mo.sub.2CT.sub.x, Ti.sub.3C.sub.2T.sub.x, Ti.sub.3CNT.sub.x, Mo.sub.2TiC.sub.2T.sub.x, and Mo.sub.2Ti.sub.2C.sub.3T.sub.x). Such products offer excellent electrical conductivity, improved oxidation stability, excellent coating and adhesion abilities to various hydrophobic substrates, and composite processability with hydrophobic polymers. This finding will lead to further studies on the structures, properties, and physics of the organic MXene liquid crystals and their practical applications.

A curable composition for an electronic device, includes a curable material; and an oxide-containing complex; wherein the oxide-containing complex includes i) an oxide core and ii) an organic group chemically bound to an atom on a surface of the oxide core, the organic group includes a) a curable group reactable with the curable material and b) a linking group linking the atom on a surface of the oxide core to the curable group, and the oxide core includes an aluminum oxide, a silicon oxide, or a combination thereof.

A curable composition for an electronic device, includes a curable material; and an oxide-containing complex; wherein the oxide-containing complex includes i) an oxide core and ii) an organic group chemically bound to an atom on a surface of the oxide core, the organic group includes a) a curable group reactable with the curable material and b) a linking group linking the atom on a surface of the oxide core to the curable group, and the oxide core includes an aluminum oxide, a silicon oxide, or a combination thereof.

An object of the present invention is to provide a highly heat resistant and highly rigid propylene-based polymer having unprecedentedly high stereoregularity. The propylene-based polymer of the present invention satisfies requirements (1) to (4) and preferably requirement (5): (1) an average meso chain length is 800 to 100,000; (2) a MFR is 0.5 to 1,000 g/10 minutes; (3) a ratio of Mw to Mn, Mw/Mn, as measured by GPC is 4.2 to 20; (4) when the ratio of a component which elutes at a temperature of 122° C. or more as measured by temperature rising elution fractionation (TREF) is A % by weight and the melt flow rate of the requirement (2) is B g/10 minutes, 100≥A≥20*EXP(−0.01*B); (5) an amount of a component soluble in n-decane at 23° C. is 0.01 to 2% by weight.

An object of the present invention is to provide a highly heat resistant and highly rigid propylene-based polymer having unprecedentedly high stereoregularity. The propylene-based polymer of the present invention satisfies requirements (1) to (4) and preferably requirement (5): (1) an average meso chain length is 800 to 100,000; (2) a MFR is 0.5 to 1,000 g/10 minutes; (3) a ratio of Mw to Mn, Mw/Mn, as measured by GPC is 4.2 to 20; (4) when the ratio of a component which elutes at a temperature of 122° C. or more as measured by temperature rising elution fractionation (TREF) is A % by weight and the melt flow rate of the requirement (2) is B g/10 minutes, 100≥A≥20*EXP(−0.01*B); (5) an amount of a component soluble in n-decane at 23° C. is 0.01 to 2% by weight.

A new family of Group IV transition metal catalytic compounds are provided, which are capable of catalysing the ROP of cyclic esters and cyclic amides to yield polymers of high molecular weight and narrow PDI. The new family of catalysts are surprisingly active not only in catalysing the ROP of lactones such as caprolactone, but also macrolactones (e.g. ω-pentadecalactone, PDL), where the reduced amount of ring strain would typically compromise efficient polymerisation. Also provided is a process for the ring opening polymerisation (ROP) of a cyclic ester or a cyclic amide employing the new catalytic compounds.

A new family of Group IV transition metal catalytic compounds are provided, which are capable of catalysing the ROP of cyclic esters and cyclic amides to yield polymers of high molecular weight and narrow PDI. The new family of catalysts are surprisingly active not only in catalysing the ROP of lactones such as caprolactone, but also macrolactones (e.g. ω-pentadecalactone, PDL), where the reduced amount of ring strain would typically compromise efficient polymerisation. Also provided is a process for the ring opening polymerisation (ROP) of a cyclic ester or a cyclic amide employing the new catalytic compounds.