羧甲基玉米粉在全生物降解地膜中的应用

试验研究了用羧甲基玉米粉替代羧甲基淀粉制备全生物降解地膜的可能性。考察了羧甲基玉米粉和羧甲基淀粉的质量分数对全生物降解地膜的透明度、强度、拉伸率和成膜液黏度等性质的影响。结果表明，二者对地膜性能的影响特点相同。当羧甲基玉米粉和羧甲基淀粉质量分数大于3．5％时，湿膜的强度、拉伸率、透光率均逐渐降低。成膜液黏度提高。综合考虑地膜的机械性能、透光率及机械喷涂对成膜液黏度的要求，当羧甲基玉米粉质量分数为3％时．全生物降解地膜的性能达到了使用要求。

Study on application of carboxymethyl corn powder in biodegradable mulch film

Studies on the possibility that the biodegradable mulch film were carried out by using the carboxymethyl corn powder (CMCP) instead of the carboxymethyl starch (CMS). The effects of CMCP or CMS content in the film on transmissivity, intensity, elongation ratio and the viscosity were discussed. The results showed that CMCP film was about the same characteristics as CMS film. When content of CMCP or CMS exceed 3.5%, the transmissivity, intensity and elongation ratio will gradually drop down, but the viscosity of making film solution will be increased. According to mechanical property, viscosity of machine spray coating and transmissivity, the favourate adding quantity of CMCP was about concentration of 3%.