摘要
为了探明雾滴体积和测量时间对接触角测量的影响程度，以蜡膜和载玻片为参照，研究了不同体积和不同测量时间下液滴在稻叶表面的接触角，并通过扫描电镜观察了稻叶的表面特性。结果表明：液滴体积越大，在稻叶上的接触角越小，测量体积可选择l～5出，测量时间可选择在液滴滴下后40～60s。液滴在滴下后的108内接触角变化率较大，其中以亲水的载玻片上的接触角变化率（0．66±0．03）最大，随着时间的延长接触角变化率显著降低。电镜观察结果表明：稻叶为疏水界面很大程度取决于其表面的SiO2-蜡质复合体所形成的乳头状突起，其正、反面的密度分别为（1778．4±13．2）和（1563．6±35．2）个·mm^-2。
In order to indicate the effect of droplet volume and measuring time on contact angle（CA） of droplet on rice leaf surface, to palafilm and slide glass for the reference, contact angle of water droplets on rice leave surface was studied under different volumes and different measuring time. The rice leaf character was also studied by electronic scanning microscope（SEM）. The results showed that the more droplet volume was, the smaller CA on rice leaf surface was. Contact angle variation（r） was greater in 10s, and the maximum r：0 （0.66 ~ 0.03 ） was on slide glass. Contact angle variation reduced significantly with the increasing contact time. The results of SEM were proved that rice leaf surface was hydrophobic interface depending to a large extent on its papilla, the complex of SiO2-wax. Densities of papilla on adaxial and abaxial surface of rice leaf were （ 1778.4 ± 13.2） and （ 1563.6 ± 35.2） · mm^ -2, respectively.
出处
《西南农业学报》
CSCD
北大核心
2013年第6期2307-2311,共5页
Southwest China Journal of Agricultural Sciences
基金
国家自然科学基金项目(31101459)
江苏省农业科技创新基金[cx(12)5006)]
关键词
水稻
接触角
雾滴体积
测量时间
乳突
Rice
Contact angle
Droplet volume
Measuring time
Papilla
