Abstract: Provided are a biodegradable polyester resin and an article including the resin. The provided biodegradable polyester resin includes an aliphatic dicarboxylic acid residue including a succinic acid residue and an adipic acid residue; and an aliphatic diol residue including at least one selected from the group consisting of an ethylene glycol residue and a butanediol residue in order to improve biodegradability and flexibility.

Abstract: Disclosed are an admixture composition for a tile cement mortar and a tile cement mortar composition comprising the admixture composition. The disclosed admixture composition for a tile cement mortar comprises a cellulose ether, a polyacrylamide-based polymer coagulant and an inorganic coagulant.

Abstract: A film and a method of preparing the same. The film includes cellulose ether and sodium chloride, wherein an amount of the sodium chloride is from about 0.25 wt % to about 0.6 wt % based on a total weight of the film, and the film has a light-transmission reduction ratio of about 15% or less.

Abstract: Disclosed is a method for manufacturing lithium metal phosphate (LMP) having, as a precursor, crystalline iron phosphate salt having a (meta)strengite structure or metal-doped crystalline iron phosphate salt having a (meta)strengite structure, the method comprising the steps of: mixing a lithium raw material with crystalline iron phosphate salt in a slurry phase or a cake phase; and heat-treating the mixture. The method, by mixing a lithium (Li) raw material and a carbon (C) coating material with crystalline iron phosphate salt in a slurry phase or a cake phase, allows elements such as Li, Fe, P and C to be homogeneously mixed, and then, by having the elements dried simultaneously, enables manufacturing of high-quality LMP. Therefore, the present invention is not only capable of providing convenience during the manufacturing process for lithium metal phosphate, but also capable of providing a lithium secondary battery positive electrode active material having excellent battery characteristics.

Abstract: There are provided a resin composition for foaming including a biodegradable resin and a foamed article made thereof. The resin composition for foaming according to the present invention includes an ethylene-vinyl acetate resin, a biodegradable polyester resin containing a monomer of a double bond compound, a cross-linking agent, a co-crosslinking agent, a filler, and a foaming agent. In the resin composition, the double bond in the biodegradable polyester resin can be chemically cross-linked to the ethylene-vinyl acetate resin by a cross-linking agent, so that a compatibility with the ethylene-vinyl acetate resin can be improved, processability (mold releasability) during a mixing and melting process can be improved, and a foaming property and a mechanical property of a foamed article can be remarkably improved.

Abstract: There is provided a method of preparation for a biodegradable co-polyester, the method including: forming an oligomer through a primary esterification reaction between a hydroxy group of an aliphatic dihydroxy compound and a carboxylic group of an aliphatic dicarboxylic acid compound; performing a secondary esterification reaction between the formed oligomer and an aromatic dicarboxylic acid compound; and performing a polycondensation reaction in a vacuum, in which sequentially divided addition of the aromatic dicarboxylic acid compound is performed and the weight ratio of the aromatic dicarboxylic acid compound with respect to the oligomer for each time of the sequentially divided addition is from 2:8 to 5:5. The method efficiently increases a solubility of aromatic dicarboxylic acid, thereby increasing a reaction rate and reducing a side reaction.

Abstract: A passivation layer solution composition is provided. A passivation layer solution composition according to an exemplary embodiment of the present invention includes an organic siloxane resin represented by Chemical Formula 1 below. In Chemical Formula 1, R is at least one substituent selected from a saturated hydrocarbon or an unsaturated hydrocarbon having from 1 to about 25 carbon atoms, and x and y may each independently be from 1 to about 200, and wherein each wavy line indicates a bond to an H atom or to an x siloxane unit or a y siloxane unit, or a bond to an x siloxane unit or a y siloxane unit of another siloxane chain comprising x siloxane units or y siloxane units or a combination thereof.

Abstract: A continuous preparation method of a biodegradable aliphatic/aromatic polyester copolymer includes: performing a first esterification reaction of an aliphatic dihydroxy compound with an aliphatic dicarboxylic acid at a temperature of 185° C.

Abstract: Provided is a hard capsule. The provided hard capsule includes water-soluble cellulose ether, about 0.5 parts by weight to about 1.5 parts by weight of a gelation agent based on 100 parts by weight of the water-soluble cellulose ether, and about 0 parts by weight to about 0.3 parts by weight of a gelation aid based on 100 parts by weight of the water-soluble cellulose ether, wherein the hard capsule comprises a body and a cap that seals the body, and a ratio of a maximum thickness to a minimum thickness of the body and the cap is each 2.5 or less.

Abstract: The present invention provides surface-modified silicon nanoparticles comprising a LixSiyOz top film and a carbon (C) coating layer on the surface of the nanoparticles by means of the addition of a lithium source and a carbon source during the manufacture of silicon nanoparticles or a post-treatment thereof. According to the present invention, the surface oxidation of the silicon nanoparticles, which would easily occur during a pulverization process, can be prevented. By using the silicon nanoparticles of which oxidation is prevented as a negative electrode material, problems related to decrease in capacity and electrolyte depletion resulting from an oxidized film can be mitigated. Thus, a deterioration in the properties of a lithium secondary battery can be prevented.

Abstract: The present invention relates to a fermented milk composition containing cellulose ether and a production method thereof, the fermented milk composition includes cellulose ether as a stabilizer for preventing a whey separation phenomenon, and the production method of fermented milk includes manufacturing a fermented base; manufacturing a cellulose ether syrup; and adding the cellulose ether syrup to the fermented base to perform homogenization and cooling. As described above, in the fermented milk composition, it is possible to provide a fermented milk beverage securing stabilized phase stability and having reduced sourness by applying cellulose ether in a small amount instead of pectin as the stabilizer for preventing the whey separation phenomenon.

Abstract: The present invention relates to a negative electrode active material for a secondary battery, a conductive composition for a secondary battery, a negative electrode material including the same, a negative electrode structure and secondary battery including the same, and a method for manufacturing the same. The present invention includes: a silicon particle; and an amorphous surface layer formed on the surface of the silicon particle. According to the present invention, the negative electrode structure is formed of a composite of a silicon particle and carbon or lithium ion, the oxygen contents of the solid electrolyte and silicon particles are low, and thus aggregation of silicon particles is inhibited. Therefore, in the event of using the negative electrode structure in a negative electrode, a power storage device such as a lithium secondary battery may have high energy density, high output density, and a longer charging/discharging life cycle.

Abstract: The present invention relates to a supercapacitor electrode material in which a transition metal oxide and a carbon-based material are combined, and particularly, to a supercapacitor electrode material which increases) the capacitance of a capacitor by increasing a specific surface area through the process of making pores of a transition metal oxide and then applying the transition metal oxide having the increased specific surface area, and to a method for manufacturing the supercapacitor electrode material. According to the present invention, the supercapacitor electrode material is manufactured by mixing and reacting a layered titanium oxide with a spherical titanium oxide to obtain a porous titanium oxide, and combining the porous titanium oxide with a carbon-based material.

Abstract: A method of preparing a metal precursor and a method of preparing a metal ink using the same are provided. The method of preparing a metal precursor and the method of preparing a metal ink using the same can be useful in facilitating separation and purification of a precursor from impurities formed during precursor synthesis by allowing a metal precursor to form a suboligomeric aggregate as the metal precursor is synthesized using a fatty acid having a substituent at an ? position, and also enhancing solubility, enabling low-temperature sintering and improving coating film physical properties and electrical properties of the final metal ink.

Abstract: A method of preparing metal nanoparticles for metal inks, and a method of preparing a metal nanoparticle ink using the same are provided. The method includes dissolving a metal precursor having a substituent at an ? position, and applying an energy source or a mechanical force to the metal precursor solution. Also, the method includes preparing metal nanoparticles capable of adjusting an average particle size of the metal nanoparticles according to synthesis conditions, and preparing a metal nanoparticle ink by dissolving the prepared metal nanoparticles. Accordingly, the prepared metal nanoparticle ink can have improved dispersion stability and electric physical properties.

Abstract: A method of preparing metal nanoparticles using a phase transfer reduction method in which a reduction reaction is adjusted by distribution equilibrium between an intermediate formed by a coordinate bond between a capping material and various metal precursors in the form of an organic phase and a reducing agent present in an aqueous phase, and a metal ink prepared from the metal nanoparticles. The method of preparing metal nanoparticles includes dissolving a metal precursor and a capping agent in an organic phase, dissolving a reducing agent in an aqueous phase, mixing the organic phase and the aqueous phase to form a precipitate, separating the precipitate, and drying the separated precipitate. The metal nanoparticles prepared using the method can be prepared to have various particle sizes according to the kind of precursors and a length of an alkyl chain of an amine used as the capping agent.

Abstract: The present invention relates to a method for preparing a lithium metal phosphor oxide, the method including: mixing an iron salt solution and a phosphate solution in a reactor; applying a shearing force to the mixed solution in the reactor during the mixing to form a suspension containing nano-sized iron phosphate precipitate particles; obtaining the nano-sized iron phosphate particles from the suspension; and mixing the iron phosphate with a lithium raw material and performing firing, and the lithium metal phosphor oxide according to the present invention has an Equation of LiMnFePO4. Herein, M is selected from the group consisting of Ni, Co, Mn, Cr, Zr, Nb, Cu, V, Ti, Zn, Al, Ga, and Mg, and n is in a range of 0 to 1.

Abstract: The present invention relates to a method of manufacturing ultra-low viscosity hydroxyalkyl cellulose through a partial neutralization method, and the method includes: reacting cellulose with an alkalizing agent to obtain alkalized cellulose; reacting the alkalized cellulose with an etherifying agent to obtain hydroxyalkyl cellulose; performing first neutralization of the hydroxyalkyl cellulose; decomposing the hydroxyalkyl cellulose by using hydrogen peroxide; and performing second neutralization of the hydroxyalkyl cellulose. Through the aforementioned method, ultra-low viscosity hydroxyalkyl cellulose can be manufactured while preventing a process problem, such as swelling, which may occur through the decomposition of an acid treatment.

Abstract: The present invention relates to a method for preparing nano-sized iron phosphate particles, the method including the steps of: mixing an iron salt solution and a phosphate solution in a reactor in order to prepare a suspension containing amorphous or crystalline iron phosphate precipitate; and applying a shearing force to the mixed solution inside the reactor during the step of mixing, wherein the suspension containing nano-sized iron phosphate precipitate particles is formed by means of the shearing force and the conditions inside the reactor. According to the present invention, micro-mixing takes place faster than nucleation, which provides an advantage for preparing nanoparticles and for preparing particles having a uniform particle size distribution.

Abstract: The present invention relates to a method for preparing acetylated cellulose ethers having improved anti-fouling properties and to acetylated cellulose ethers prepared by same. The method for preparing acetylated cellulose ethers having improved anti-fouling properties comprises the steps of: cross-linking cellulose ethers; and acetylating the cross-linked cellulose ethers. The acetylated cellulose ethers prepared by the method may activate the hydroxyl group which is made into blocks by the agglomeration between polymers performed by the materials for cross-linking the cellulose ethers, and may introduce thereto an additional hydrophilic group so as to increase hydrophilic properties, and thus may improve anti-fouling properties when applied to water-treatment membranes.