Abstract:
A bio-composites with improved mechanical properties is provided to suppress hydrolysis progressing due to high temperature and/or the moisture in the manufacture of the bio composites containing a biodegradable polymer and to maintain the property in high temperature and high humidity environment. A bio-composites with improved mechanical properties comprises a main material consisting of a biodegradable polymer and a cellulose based-natural matter; and 0.1-50 weight% of an antihydrotic agent. The biodegradable polymer is a polybutylene succinate(PBS), polybutylene succinate adipate(PBSA) or polylactic acid(PLA).
Abstract:
A method for manufacturing polylactic acid bio composite material is provided to produce a polylactic acid bio composite material by adopting a compression molding using a carding process. A method for manufacturing polylactic acid bio composite material comprises a step for preparing the web by blending fabric through a carding process by selecting substrate polymer the polylactic acid(PLA) fiber and natural fiber as reinforcing material; a step for making the mat by pre-loading the web; and a step for manufacturing by compressing and molding the bio composite plate mat. In a step for preparing web, the web is prepared by replacing some of polylactic acid fiber with the polypropylene fiber. The replaced polypropylene fiber forms 15~35 weight% among the web total weight.
Abstract:
A heteropoly acid catalyst immobilized onto nitrogen-containing mesoporous carbon is provided to form a cationic functional group in mesoporous carbon simply and efficiently as compared with a conventional method, a preparation method the catalyst is provided, and a preparation method of methacrylic acid using the catalyst is provided to maximize production of methacrylic acid by maximizing a surface type oxidation reaction of the heteropoly acid catalyst in the conversion reaction of methacrolein using the heteropoly acid catalyst. A heteropoly acid catalyst immobilized onto nitrogen-containing mesoporous carbon is characterized in that: the heteropoly acid catalyst is used in an acid catalytic reaction or an oxidation reduction catalytic reaction; and the heteropoly acid catalyst is immobilized onto the nitrogen-containing mesoporous carbon through chemical bonding by hydrogenating nitrogen-containing mesoporous carbon having an average pore size ranging from 2 to 1000 nm to convert the nitrogen into an amine group(-NR1R2R3^+) and by reacting the amine group with a heteropoly acid catalyst, wherein R1, R2 and R3, each independently is hydrogen or an alkyl group having 1 to 20 carbon atoms. The nitrogen-containing mesoporous carbon is prepared by using carbon molecular sieve as a porous carbonaceous material and using spherical or nano-structured silica or nano-structured inorganic compound as a template.
Abstract:
PURPOSE: A nickel catalyst and a manufacturing method thereof are provided to offer very stable catalytic activity for a long time, and to manufacture hydrogen gas of high concentration by ethanol autothermal reforming reaction. CONSTITUTION: A nickel catalyst supported on mesoporous zirconia is used for manufacturing hydrogen by autothermal reforming reaction of ethanol. The catalyst uses a block copolymer or a cationic surfactant as a mold. In the catalyst, the nickel of 1 ~ 50 weight parts is supported on a zirconia carrier of 100 weight parts. The zirconia carrier having a mesopore is manufactured by a thermo-polymerization method.
Abstract:
A bio-composites with improved mechanical properties is provided to suppress hydrolysis progressing due to high temperature and/or the moisture in the manufacture of the bio composites containing a biodegradable polymer and to maintain the property in high temperature and high humidity environment. A bio-composites with improved mechanical properties comprises a main material consisting of a biodegradable polymer and a cellulose based-natural matter; and 0.1-50 weight% of an antihydrotic agent. The biodegradable polymer is a polybutylene succinate(PBS), polybutylene succinate adipate(PBSA) or polylactic acid(PLA).
Abstract:
A method for manufacturing dimethoxymethane is provided to increase the production of dimethoxymethane due to the property of acid existing within a catalyst and to improve the oxidation reaction property in the methanol transformation reaction, compared with a unsupported catalyst by introducing a cation functional group to the mesopore carbon containing nitrogen and using a heteropolyacid catalyst. A method for manufacturing dimethoxymethane comprises a step for passing through the intermediate of dimethoxymethane by an acid-catalyzed reaction and a consecutive oxidation reaction of methanol or producing formaldehyde by the direct oxidation reaction of methanol; a step for preparing methoxymethanol by the acid catalytic reaction between the formaldehyde and methanol; a step for preparing dimethoxymethane by the acid catalytic reaction between methoxymethanol and methanol. In the chemical reaction, the heteropolyacid catalyst which can perform a Bi-functional catalyst of the acid catalytic reaction and oxidation reaction at the same time is used. The heteropolyacid catalyst is fixed to a mesopore carbon containing nitrogen having the average pore size of 2-50nm.
Abstract:
본 발명은 중형기공 지르코니아에 담지된 니켈 촉매, 그 제조방법 및 상기 촉매를 이용한 에탄올의 자열개질반응에 의한 수소 제조방법에 관한 것으로서, 보다 상세하게는 에탄올의 자열개질반응에 의한 수소제조에 사용되는 촉매에 있어서, 상기 촉매는 블록 공중합체 또는 양이온성 계면활성제를 주형으로 하고 지르코늄 전구체를 졸-겔법에 의해 수화 및 축합한 후 수열중합법에 의해 제조된 중형기공을 갖는 지르코니아 담체 100중량부에 대해 1 내지 50중량부 범위의 니켈이 담지된 것을 특징으로 하는 중형기공을 갖는 지르코니아 담체에 담지된 니켈촉매, 그 제조방법 및 상기 촉매를 이용한 에탄올의 자열개질반응(Autothermal Reforming)에 의한 수소 제조방법에 관한 것이다. 본 발명은 양이온성 계면활성제 또는 블록공중합체를 주형으로 하여 수열합성에 의해 중형 기공을 갖는 지르코니아를 담체를 제조하고 상기 담체에 니켈 촉매를 담지한 형태의 촉매를 제공하여, 이를 에탄올 자열 개질반응을 통한 수소제조 공정에 이용할 경우 활성금속 성분인 니켈을 고분산시켜 탄소침적과 소결현상이 완화되어 장시간 높은 활성을 유지하고, 수소 생산량을 증가시킬 수 있다. 중형 기공 지르코니아, 니켈촉매, 에탄올, 자열개질반응, 수소
Abstract:
A supported heteropolyacid catalyst immobilized on mesoporous carbon is provided to allow firm chemical bonding between a heteropolyacid catalyst and mesoporous carbon, to activate properties as an oxidation catalyst, and to increase the selectivity during a catalytic reaction, particularly for preparing a methacrylic acid. A supported heteropolyacid catalyst immobilized on mesoporous carbon is obtained by immobilizing at least one anionic heteropolyacid selected from the group consisting of (a) Keggin type heteropolyacids including 12-molybdophosphoric acid(H3PMo12O40), 12-tungstophosphoric acid(H3PW12O40), 12-tungstosilicic acid(H4SiW12O40), 12-molybdotungstophosphoric acid(H3PMo12-xWxO40, x=0-12), 12-molybdovanadophosphoric acid(H3+xPMo12-xVxO40, x=0-12) and 12-tungstovanadophosphoric acid(H3+xPW12-xVxO40, x=0-12), and (b) Wells-Dawsons type heteropolyacids including 18-molybdophosphoric acid(H6P2Mo18O62), 18-tungstophosphoric acid(H6P2W18O62), 18-molybdotungstophosphoric acid(H6P2Mo18-xWxO62, x=0-18), 18-molybdovanadophosphoric acid(H6+xP2Mo18-xVxO62, x=0-18), 18-tungstovanadophosphoric acid(H6+xP2W18-xVxO62, x=0-18) and 18-tungstoneobiumphosphoric acid(H6+xP2W18-xNbxO62, x=0-18) to mesoporous carbon having cationic functional groups attached to the surface thereof through a chemical bonding.