Abstract:
A method for manufacturing a biodegradable plastic/nanofiber complex support material neurogram pipe is provided to offer excellent shape stability which can obtain flexibility and an original inside diameter until neural tissues are recovered. Biodegradable plastic reinforcing materials(40) are inserted into a tube-type electrospinning collecting unit(10) having various sizes of diameters(11), so that the inserted biodegradable plastic reinforcing materials are fully contacted for mutual connection with the electrospinning collecting unit. A biodegradable high molecular solution is electrically radiated to the electrospinning collecting unit and the plastic reinforcing materials, which are coupled together, to manufacture nanofiber.
Abstract:
Polyvinylalcohol hydrogel particles are provided to be amorphous irrespective of the degree of hydrolysis, to ensure relatively low specific gravity and increased surface unevenness, and to exhibit improved dispersibility in a contrast medium when the particles are used as an embolizing agent. Polyvinylalcohol hydrogel particles are prepared by dispersing poly(vinyl acetate) microspheres in an aqueous acid solution. The aqueous acid solution comprises 0.1-3 M of hydrochloric acid, 0.1-500 ml of alcohol, and 0.1-300 g of an inorganic salt, based on the aqueous acid solution 1L. The polyvinylalcohol hydrogel particle has an uneven surface. The alcohol is methanol or ethanol. The inorganic salt is sodium sulfate or sodium sulfite.
Abstract:
색상및 열안정성이향상된수수천연색소의제조방법, 수수천연색소추출물에아세트알데하이드를처리하는단계를포함하는천연색소의안정화방법및 상기천연색소를플라스틱성형재료에혼합하여플라스틱성형물을제조하는단계를포함하는천연색소로착색된플라스틱성형물의제조방법에관한것이다. 수수로부터천연색소추출물을추출한후, 이를아세트알데하이드와축합반응하여색상및 열안정성이향상된고분자화된천연색소를제조하였으며, 이를플라스틱과혼합하여, 색상안정성이향상된플라스틱을제조할수 있다. 따라서, 이러한방법에의해생산된플라스틱을이용하여천연색소를함유한인체친화적이고위생적인제품을개발할수 있다.
Abstract:
본발명은일광견뢰도가향상된플라스틱을제조하는방법에관한것으로서, 보다상세하게는 (a) 수수()의잎, 줄기및 이의혼합물로구성된군으로부터선택된어느하나의추출물을플라스틱성형재료에혼입하여플라스틱성형물을제조하는단계; 및 (b) 상기에서제조된플라스틱성형물을금속염이포함된용액으로처리하는단계를포함한다. 본발명은수수부산물로부터항균및 항산화활성을갖는천연색소를추출하여플라스틱과혼합하는방법을제공하고있으며, 이에의해생산된플라스틱을이용하여천연색소를함유한인체친화적이고위생적인제품을개발할수 있다. 특히, 본발명은수수에서추출한색소로착색된플라스틱사출물제조를위한최적가공법을제공함에있어, 천연색소의문제점인일광에대한낮은안정도를높이기위해금속염과의최적가공조건을확립함으로써천연색소로착색된제품의완성도를높일수 있다.