Abstract:
본 기술은 용매를 이용한 락타이드 제조방법으로서, 락타이드를 제조할 때 두번째 단계에서 이온성 액체를 용매로 사용하여 반응물의 모빌러티를 확보하여 반응 온도를 낮추고 반응 중 발생하는 수분을 이온성 액체에서 흡수하여 수분에 취약한 락타이드가 분해가 일어나지 않도록 할 수 있다. 뿐만 아니라 지속적인 올리고머 투입에 의한 연속적인 락타이드 제조가 가능하게 된다. 이온성 액체에 의해 반응 부산물에 의한 반응기 오염이 최소화되어 반응기 세척을 위한 용매가 불필요하게 된다. 더불어 이온성 액체의 높은 끓는점으로 인해 이온성 액체의 회수 및 재활용도 용이한 장점이 있다.
Abstract:
The present invention relates to a polylactic acid resin composition for a hot-melt adhesive film, more specifically, to a polylactic acid resin composition for a hot-melt adhesive film, wherein the composition reduces foul odor and improves adhesion by mixing a linear low density polyethylene resin, an acrylate comonomer resin with good adhesion to a fiber material, and a low carbon polylactic acid resin obtained from biomass at an optimal ratio and can be utilized in environment-friendly automotive parts by containing 20% or more biomass.
Abstract:
PURPOSE: A method for preparing D-type lactic acids is provided to obtain high purity D-type lactic acids of high yield by separating generated lactic acids through selective absorption/desorption using an activated carbon stick and to largely save time and costs. CONSTITUTION: A method for preparing D-type lactic acids from sugar through fermentation comprises the steps of: adding microorganisms to sugar in a fermentation reactor and preparing a fermented liquid; adding a sterilized stick to the fermentation reactor and adsorbing lactic acids; isolating the lactic acid-adsorbed activated carbon stick from the fermentation reactor and precipitating the lactic acid-adsorbed activated carbon stick in a collection reactor; and desorbing lactic acids in an acetic solvent contained in the collection reactor and collecting D-type lactic acids. [Reference numerals] (AA) Fermentation reactor; (BB) Move after taking out
Abstract:
PURPOSE: A method for preparing type D lactic acid is provided to quickly and cheaply prepare the type D lactic acid. CONSTITUTION: A method for preparing type D lactic acid with high optical purity comprises a step of culturing E.coli(KCTC 2223) at constant temperature and pH. The pH concentration is controlled by supplying an ammonium solution(NH_4OH). The optical purity of the type D lactic acid is 99% or more. The E.coli is cultured by batch culture or continuous culture under an anaerobic condition. [Reference numerals] (AA) Stain; (BB) Glucose; (CC) Fermenter; (DD) Fungus body separation; (EE) Culture medium; (FF) D lactic acid
Abstract:
The present invention relates to a method for decomposing biomass and, more specifically, to a method for decomposing biomass using ionic liquid which comprises a step for removing lignin in the biomass, and a step for dissolving cellulose by mixing the lignin-free biomass with ionic liquid; and uses the ionic liquid in pretreatment of the plant biomass so as to be eco-friendly and has a high decomposition efficiency for cellulose.
Abstract:
The present invention relates to a high density natural fiber containing polylactic acid and, more specifically, to a high density natural fiber containing polylactic acid which can improve processability through the increase of density by infiltrating, into the surface of the natural fiber, resin melt containing a polylactic acid resin and a coupling agent; and which can be utilized in various industrial material fields as well as vehicle components by using the high density natural fiber as a polylactic acid natural fiber composite material. [Reference numerals] (AA) Natural fabric; (BB) Molten resin; (CC) Cooling unit; (DD) Cutter