CAJ | 학술논문

利用淀粉聚己内酯基共混物制做可降解塑料近年得到很大的发展.本文主要研究增塑剂(氯化胺、尿素、山梨醇、蔗糖、山梨醇酯60,甘氨酸和酪氨酸)对基础混合物(50:50 木薯淀粉和聚己内酯基加上35%的50:50甘油和水)物理性能和生物降解能力的影响.结果表明:除酪氨酸外,随着增塑剂含量的增加,各种增塑剂均有效地降低混合物的熔体粘度, 其中山梨醇酯60和氯化胺最有效.用拉伸强度和断裂伸长率表示的机械性能表明:尿素和氯化胺能提高基础混合物的断裂伸长,而酪氨酸能提高基础混合物的抗张强度.生物降解能力试验表明:在脂肪酶和α-淀粉酶的作用下,山梨醇、蔗糖和甘氨酸能增加基础混合物的溶解性和降解性,而氯化胺则降低降解性,近一步研究表明:尿素和山梨醇酯60对基础混合物的降解性影响很小.本项研究表明:基础混合物物理性能的提高依赖于增塑剂类型和增塑剂的含量,我们可以改变增塑剂类型和含量来发展具有不同性质的可降解塑料.
이용정분취기내지기공혼물제주가강해소료근년득도흔대적발전.본문주요연구증소제(록화알、뇨소、산리순、자당、산리순지60,감안산화락안산)대기출혼합물(50:50 목서정분화취기내지기가상35%적50:50감유화수)물이성능화생물강해능력적영향.결과표명:제락안산외,수착증소제함량적증가,각충증소제균유효지강저혼합물적용체점도, 기중산리순지60화록화알최유효.용랍신강도화단렬신장솔표시적궤계성능표명:뇨소화록화알능제고기출혼합물적단렬신장,이락안산능제고기출혼합물적항장강도.생물강해능력시험표명:재지방매화α-정분매적작용하,산리순、자당화감안산능증가기출혼합물적용해성화강해성,이록화알칙강저강해성,근일보연구표명:뇨소화산리순지60대기출혼합물적강해성영향흔소.본항연구표명:기출혼합물물이성능적제고의뢰우증소제류형화증소제적함량,아문가이개변증소제류형화함량래발전구유불동성질적가강해소료.
The technology of using starch/polycaprolactone (PCL) base blend for producing bi odegradable plastics advances rapidly in recent years. We study the effect of pl asticizers (amonium choride, urea, sorbitol, sucrose, span60, glycine, and tyros ine) on the physical property and biodegradability of the base blend of cassava starch: PCL (50:50) with 35% glycerol and water (50:50). We find all the plastic izers, except tyrosine, are effective in lowering the blend melt viscosity, by i ncreasing the plasticizer content. Among all plasticizers, span60 and amonium ch oride (NH4Cl) exhibit the greatest efficiency. Mechanical test, described by t ensile strength and breaking elongation, indicates that using urea and NH4Cl would improve the base blend breaking elongation, and using tyrosine would impr ove the base blend tensi le strength. It shows that sorbitol, sucrose, and glycine increase the solubili ty and degradability of the base blend by lipase or α-amylase, while amonium c ho ride decreases the degradability. Further investigation reveals that urea and sp an60 affect slightly on degradability of the base blend. These results suggest t hat we can alter the type and concentration of plasticizer to develop a range of biodegradability plastics with different properties.