壳聚糖膜对乙烯缓释性能的影响  

Preparation and release properties of ethrel/chitosan complex films

作　　者：林宝凤[1] 张郭元 梁兴泉[1] 蒙舒婷 

机构地区：[1]广西大学化学化工学院,广西南宁530004

出　　处：《广西大学学报（自然科学版）》2014年第5期1154-1160,共7页Journal of Guangxi University（Natural Science Edition）

基　　金：国家自然科学基金资助项目(51263001)

摘　　要：为实现植物生长调节剂乙烯利的控释作用,以壳聚糖作为载体,采用流延法在65℃下水浴干燥制备负载乙烯利的壳聚糖复合膜,研究复合膜的结构及缓释性能。结果表明:复合膜缓释乙烯气体的速率与缓释环境的pH值、空气相对湿度呈正相关,跟乙烯利的含量呈负相关;乙烯利含量20%时,复合膜中的乙烯利在相对湿度为54.6%、74.9%和97.7%条件下的半衰期分别为16.6 d、9.7 d和5.9 d;在pH为7.0和7.5缓冲溶液中的半衰期为7.5 h和4.5 h。复合膜的X射线衍射谱、扫描电镜图表明:乙烯利的添加量对复合膜的结晶度、表面的平整性等均有影响;乙烯利含量为20%时复合膜的拉伸强度较空白样提高了7.17 MPa。乙烯利/壳聚糖复合膜实现了乙烯利的控释作用,为乙烯利的使用提供新思路。In order to realise the controlled release effect of ethrel, a plant growth regulator, a com-plex film containing chitosan as a carrier and ethrel as a release agent was fabricated via a casting method and dried at 65 ℃.The structure and slow release performance of the complex film was studied.The result showed that the complex film slowly release ethylene into atmosphere over time, the release rate was positively correlated with the pH value of the environment and air relative hu-midity, but inversely correlated with the content of ethrel; when the ethrel content was 20%, the half-life of ethrel of the complex film respectively was 16.6 d, 9.7 d and 5.9 d in the condition of 54.6%, 74.9%and 97.7%relative humidity; in pH 7.0 and 7.5 buffer solution it has the half-life as 7.5 h and 4.5 h.The X-ray diffraction spectroscopy and scanning electron microscopy figure of the complex film showed that the crystallinity, smoothness of the surface, and the mechanical properties of the film was affected by the content of the ethrel.When the ethrel content was 20%, the composite film tensile strength increased by 7.17 MPa.The ethrel/chitosan film achieves the controlled release effect of ethrel and provides new ideas for the use of ethrel.

关 键 词：乙烯利 壳聚糖 复合膜 缓释 

分 类 号：O636.1[理学—高分子化学]