植物油基增塑剂增韧聚L-乳酸及其γ-辐照效应  

Poly-L-lactic Acid Toughed by Plant Oil-based Plasticizers and Itsγ-Radiation

作　　者：牛明军[1] 鹿孟张 禹欣涛 田青亮 段瑞侠[1] 刘文涛[1] 楚军政 陈金周[1] Niu Mingjun;Lu Mengzhang;Yu Xintao;Tian Qingliang;Duan Ruixia;Liu Wentao;Chu Zhengjun;Chen Jinzhou(School of Material Science and Enginering,Zhengzhou University,Zhengzhou 450001,China;Henan Institute of Product Quality Supervision and Inspection,Zhengzhou 450047,China;Isotope Institute of Henan Province,Zhengzhou 450052,China;Henan Zhengtong Food Technology Co.,Ltd.,Zhengzhou 450100,China)

机构地区：[1]郑州大学材料科学与工学院,郑州450001 [2]河南省产品质量监督检验院,郑州450047 [3]河南省同位素研究所,郑州450052 [4]河南正通食品科技有限公司,郑州450100

出　　处：《工程塑料应用》2021年第11期1-8,共8页Engineering Plastics Application

基　　金：国家重点研发计划(2018YFD0400702)。

摘　　要：以聚L–乳酸(PLLA)为基材,选用食品卫生级的环氧大豆油(ESO)、环氧大豆油丙烯酸酯(AESO)、乙酰化单双甘油脂肪酸酯(ACETEM)为增塑剂,以三烯丙基异氰脲酸酯(TAIC)为敏化剂,采用双螺杆熔混挤出和吹膜技术制备了全生物基增韧PLLA,并对所制备的材料进行了较低剂量的γ–辐照。结果表明,在增塑剂质量分数0~12.5%范围内,随着增塑剂含量增加,增韧PLLA材料的断裂伸长率先升高后降低,拉伸强度则不断降低。经γ–辐照后,材料的强度和韧性明显改善。观察材料断面形态发现,经γ–辐照的材料内部相分离现象减弱,组分之间相容性得到明显改善。辐照剂量低于10 kGy的γ–辐照增韧PLLA薄膜的二氧化碳、氧气和水蒸气的透过率,均随吸收剂量增加而增大,而辐照剂量大于10 kGy之后,则随之分别减小。Using poly-L-lactic acid(PLLA)as the base material,selecting food sanitary grade epoxy soybean oil(ESO),epoxy soybean oil acrylate(AESO)and acetylated mono-and diglyceride fatty acid esters(ACETEM)as toughening agents,fully bio-based toughened PLLA was prepared by mixing extrusion and blown film technology,and the prepared material was irradiated with a lower dose ofγ-irradiation.The results show that within the content range of 0-12.5wt%of the toughening agent,with the increase of the content of the toughening agent,the elongation at break of the ductile PLLA material first increases and then decreases,and the tensile strength decreases continuously.Afterγ-irradiation,the strength and toughness of the material are significantly improved.Sectional observation shows that the internal phase separation of the material is weakened,and the compatibility between the components is significantly improved.The carbon dioxide,oxygen,and water vapor transmission rates of theγ-irradiated PLLA composite film with an absorbed dose of less than 10 kGy all increase with the increase of the absorbed dose,and when the absorbed dose is greater than 10 kGy,the transmission rates will increase respectively decrease.

关 键 词：聚L–乳酸 植物油基增塑剂 γ–辐照 改性 

分 类 号：TQ322.6[化学工程—合成树脂塑料工业]