【作者】 文风；

【导师】 尹业平；

【作者基本信息】 华中农业大学 ， 农药学， 2004， 硕士

【摘要】 在本次课题中，测试了800目滑石粉、800目碳酸钙与325目膨润土经过活化改性后的吸油率，比较确定了三者的最佳活化剂用量，结果表明这三种粉体活化所用活化剂最佳质量百分比分别为1.5％、1.5％、2.5％左右。分别制备了滑石粉和膨润土的填充母料，并通过测试粉体及助剂对母料粘度的影响分析了两种母料的流动性。同时分析了滑石粉和碳酸钙母料流动性能的差别，发现滑石粉母料流动性好于碳酸钙母料，且两者共混会造成母料流动性变差。采用吹塑法制备了填充滑石粉或膨润土母料的可降解薄膜，测定了各种不同载体树脂和母料填充量薄膜的力学性能，并以此为根据确定了载体树脂的最佳配比以及母料的最佳填充量。载体树脂最佳配比分别为HDPE／LLDPE=85／15，LDPE／LLDPE=30／70。滑石粉母料最佳填充量为20～25％，膨润土母料最佳填充量为15～20％。同时，发现滑石粉和碳酸钙两种母料共混填充吹制的薄膜其强度和韧性都较均一。通过紫外光和自然光两种方法的老化实验对比了可降解薄膜和普通薄膜在光降解性能上的差异，表明了填充型薄膜具有优异的光降解性能。另外，通过土埋试验也证明了降解薄膜具有较好的生物降解性能。利用田间试验，分析比较了降解薄膜和普通薄膜在透光率、保温、保熵以及覆盖下作物产量等各方面的区别，表明了使用降解薄膜和普通薄膜都能明显增加作物产量，而且使用降解薄膜增产效果更佳。利用工业生产的方法，分析了滑石粉母料填充LDPE／LLDPE树脂时的最佳工艺配比，找到一种兼具经济性、良好加工性和易降解性的能满足于工业生产的可降解薄膜。更多还原

【Abstract】 Talcum, calcium carbonate and bentonite were used as fillers for degradable PE films. The fillers were activated with coupling agent of organictitanate. Oil absorption of the activated fillers was determined to establish a suitable amount of the agentto be 1.5%, 1.5% and 2.5% (weight/weight) for activated Talcum, calcium carbonate and bentonite respectively. The filling masterbatchs of talcum, calcium carbonate and bentonite were prepared by blending PE respectively with the fillers activated. The rheological properties of the masterbatchs were determined and the results show that the flowability of talcum filling masterbatch is superior to that of calcium carbonat filling masterbatch and decreases greatly when the two kinds of the masterbatchs are blended. The talcum and bentonite filling masterbatchs were made into degradable films by a blow moulding machine respectively. Mechanical properties of the films with different content of carrier resin and filling masterbatches are determined. On which, the optimal formulation of carrier resin and the opimal dosage of filler of masterbatch are settled. The optimal propertions of carrier resin are as follows : HDPE/LLDPE=85/15, LDPE/LLDPE=30/70. The optimal loading level of talcum masterbatch is 20~25%. The optimal loading level of bentonite masterbatch is 15-20%. Meanwhile, it is can be found the film that hold even intension and tenacity by filling blended masterbatch of talcum and CaCO3 . After ultraviolet illumination and natural weathering exposure test, the degradation degree of degradable film is more than that of pure PE film. It is show that filling film has good degradability. In addition, degradation test in soil also proves that the degradable film has good biological degradability. The properties of transparency, thermal insulation, entropy insulation and the crop’s output ofdegradable film and common film are compared in the field experiment, which indicates degradable film and common film can both increase the crop’s output, but the effect of the former is more remarkable. The optimal technology formulation of talcum masterbatch filling LDPE/LLDPE resin is analysised and the degradable film with economization, superior processability and good degradabilty is found by imitating the process in factory.更多还原