Abstract:
PURPOSE: A porous supporter for tissue engineering obtained from a copolymer of biodegradable glycolide/ε-caprolactone having excellent mechanical properties such as flexibility and elasticity and biodegradability is provided which can be effectively used as material for regenerating tissue of desired shapes. CONSTITUTION: This porous supporter is prepared from a biodegradable glycolide/ε -caprolactone copolymer having a recurring unit of formula 1 and a weight average molecular weight of 10,000. In formula, x and y are each 18 or more. The porous supporter has a pore size of 1 to 800 microns and a porosity of 50 to 99%.
Abstract:
본 발명은 반응성이 향상된 폴리에틸렌글리콜/폴리락타이드(또는 폴리글리콜라이드 또는 폴리카프로락톤)/폴리에틸렌글리콜 삼중블록(triblock) 공중합체 및 그의 제조 방법에 관한 것이다. 더욱 상세히 말하자면, 본 발명은 양말단에 히드록시기를 갖는 폴리락타이드(또는 폴리글리콜라이드 또는 폴리카프로락톤)를 합성한 후, 한쪽 말단에 반응성이 매우 큰 아실할라이드기를 갖는 폴리에틸렌글리콜과 커플링(coupling) 반응시킴으로써 얻어지는 삼중블록 공중합체 및 그의 제조 방법에 관한 것이다. 본 발명의 삼중 블록 공중합체는 생체적합성이 우수한 에스테르 구조를 갖기 때문에 약제의 서방성 매트릭스 및 조직공학 등에 사용되는 생체 재료 등으로 광범위하게 응용될 수 있다.
Abstract:
PURPOSE: Provided are a triblock co-polymer comprising polyethylene glycol/polylactide(or polyglycolide or polycaprolactone)/polyetheylene glycol with enhanced reactivity and its preparation method. This co-polymer is used in tissue engineering or as a slow releasing matrix of drugs or pesticides by bio-compatible ester group. The product is selected from the triblock co-polymers shown by chemical formula 1, 2, 3 and 4 for each purpose. CONSTITUTION: The triblock co-polymer is represented by chemical formula 1, 2, 3 and 4 (formula 1 is PEG-COO-PL-OCO-PEG, formula 2 is PEG-COO-PG-OCO-PEG, formula 3 is PEG-COO-(PL/PG)-OCO-PEG, and formula 4 is PEG-COO-PCL-OCO-PEG), where PEG is polyethylene glycol, PL is polylactide, PG is polyglycolide and PCL is polycaprolactone. The mol. wt. of polylactide, polyglycolide, polylactide/polyglycolide and polycaprolactone is 500-30,000 and polyetheylene glycol has 750-10,000 mol. wt.. The triblock co-polymer is prepared by coupling polylactide(or polyglycolide or polycaprolactone) with OH group at both end with polyetheylene glycol which has very reactive acyl halide group at one end with pyridine as a catalyst.
Abstract:
PURPOSE: Provided is a method for preparing biodegradable porous polymer support for tissue engineering without organic solvent, which is used for regeneration of tissue and excellent in stability. CONSTITUTION: The porous polymer support for tissue engineering is prepared by mixing polymer powder and water soluble salts uniformly; pressing the resulting mixture in mold; jointing the obtained press molding while heating; and removing the water soluble salts from the molding. The polymers are biodegradable polymers selected from the group consisting of polylactide, polyglycolide, polycaprolactone, polytrimethylene carbonate, polyamino acid, polyorthoester, polyethylene oxide and copolymer thereof. The polymers are also nondegradable polymers selected from the group consisting of polyurethane, polyethylene and polycarbonate. The support has the porosity of 50 to 99%. And the pores in the support have the size of 1 to 800 micrometers.
Abstract:
본 발명은 조직재생용으로 사용될 수 있는 안정성이 우수한 다공성 고분자 지지체의 제조 방법에 관한 것이다. 보다 구체적으로는, 본 발명은 고분자 입자와 수용성 염을 균일하게 혼합한 후 일정한 주형에서 고압으로 압착하고 열에 의해 접합시킴으로써 일정한 형태를 갖도록 유도하고, 형성된 고분자 입자와 가용성 염의 성형물에서 가용성 염을 용해함으로써 다공성 지지체를 제조하는 방법에 관한 것이다. 본 발명에 의해 제공된 생분해성 다공성 지지체는 기존의 생분해성 소재를 이용한 지지체에 비해 유기용매를 사용하지 않아 조직의 재생시 매우 안정적으로 사용될 수 있으며 제조 과정이 간편하고 두꺼운 지지체의 성형에도 매우 효과적이라고 할 수 있다. 또한 이러한 제조 방법은 기존에 난용성 생분해성 고분자뿐 아니라 비분해성 고분자를 이용한 다공성 지지체 제조에도 매우 유용하게 사용될 수 있다. 이러한 관점에서 볼 때, 본 제조 방법을 통한 지지체 제조는 조직공학용 다공성 재료를 만드는 획기적인 제조법으로 널리 사용될 수 있으리라 기대된다.
Abstract:
Disclosed is a sequentially ordered biodegradable lactide (or glycolide or lactide/glycolide)/epsilon-caprolactone multi-block copolymers having proper degradation properties and enhanced mechanical properties such as flexibility and elasticity and a process for the preparation thereof.
Abstract:
PURPOSE: A biodegradable lactide(glycolide or lactide/glycolide)/ε-caprolactone multiblock copolymer having the uniform structural array and its preparation method are provided, wherein the copolymer shows excellent flexibility and elasticity and has a suitable degradation period applicable to a medical material. CONSTITUTION: The biodegradable multiblock copolymer is represented by -(A-COO-PCL-COO)n-, wherein A is polylactide, polyglycolide or polylactide/polyglycolide; PCL is poly(ε-caprolactone); and n is an integer of 2-2,000. Preferably the multiblock copolymer has a molecular weight of 2,000-500,000. The method comprises the steps of introducing an acyl halide to the end of polylactide, polyglycolide or polylactide/polyglycolide, or poly(ε-caprolactone); and coupling the introduced acyl halide with the hydroxy group of the end of the corresponding poly(ε-caprolactone) or polylactide, polyglycolide or polylactide/polyglycolide.
Abstract:
본 발명은 뛰어난 유연성 및 적당한 가수분해성을 가진 생분해성 고분자 및 이 중합체로부터 형성된 다공성 지지체에 관한 것이다. 더욱 상세히 말하자면, 본 발명은 생분해성 재료인 락타이드와 ε-카프로락톤을 이용하여 중량 평균 분자량이 10,000 이상인 락타이드/ε-카프로락톤의 생분해성 공중합체를 제조하고, 이를 이용하여 상처피복재, 세포 배양용 지지체 재료로 사용 가능한 다공성 지지체 제조에 관한 것이다.
Abstract:
PURPOSE: Provided is a porous support obtained from biodegradable lactide/epsilon-caprolactone copolymer, which has excellent mechanical properties including flexibility and elasticity suitable to be used in tissue engineering. CONSTITUTION: The porous support obtained from biodegradable lactide/ epsilon-caprolactone copolymer has repeating units represented by formula 1 and a weight average molecular weight of 10,000 or more, wherein the mole ratio of lactide to epsilon-caprolactone is 2:8 to 8:2: wherein each of x and y is an integer of 1 or more, and n is an integer of 18 or more. Particularly, the porous support has a pore size of 1 to 800 micrometers and a porosity of 50-99%.
Abstract:
Disclosed is a biocompatible medical material and porous scaffold for use in tissue engineering, made from a biodegradable glycolide/epsilon-caprolactone copolymer having a repeat unit of wherein x and y are integers greater than or equal to 18, the copolymer has an average molecular weight of about 10,000 daltons or more, and the molar ratio of glycolide: epsilon-caprolactone in the copolymer is about 4.0:6.0 to 6.0:4.0.