【正文】 淀粉是一種十分重要的天然高分子，具有來源廣泛、價格低廉和可生物降解等優(yōu)點，是制備生物可降解材料的理想原料。天然淀粉以淀粉粒的形式存在， 具有很高的結(jié)晶度(2045 ％)。通過添加分子的增塑劑，在熱和剪切的作用下可制備熱塑性淀粉材料。 目前，大量的研究工作都集中在改善熱塑性淀粉的力學性能上，本文使用轉(zhuǎn)矩流變儀，在增塑劑的存在下制備了熱塑性淀粉。以水和甘油為增塑劑制備的熱塑性淀粉，再與聚乳酸共混，對熱塑性淀粉進行改性，并對其進行力學性能測試及其表征。 　關(guān)鍵詞：熱塑性淀粉，塑化，聚乳酸，共混,，復合材料 Thermoplastic starchbased nanoposites and their structure 　　　　　　　　　　　and properties 　　Abstract: Starch is a very important natural polymer, has a wide variety of sources, low cost and biodegradable advantages, is the ideal raw material preparation of biodegradable materials. The natural starch to starch granules in the form of existence, has a high degree of crystallinity (2045%). Hydrogen bonds between starch molecules, limiting the movement of molecular chain, so the starch does not have the performance of thermoplastic processing. Add molecules of the plasticizer, the preparation of thermoplastic starchbased material under the action of heat and shear. 太原工業(yè)學院畢業(yè)論文II　　However, the poor mechanical properties and water resistance of thermoplastic starch limit its use as a material. Currently, a large number of studies have focused on thermoplastic starch to improve the mechanical properties andoil article uses a torque rheometer, thermoplastic starch prepared in the　presence of plasticizers. Starch plasticized heat, the result of both of shear and plasticizerscan not simply consider the role of one of the factors. Water and glycerol as plasticizer preparation of the TPS, and poly lactic acid blends, the preparation of posite materials, and test and Characterization of the mechanical properties. 　　In this paper the results of further studies of thermoplastic starch materials prepared by each of the consolidated performance of biodegradable materials to provide a theoreticaland practical basis.Keywords:Thermoplastic , starch, Plasticizing,Polylactic acid,Composite materials 　　　　　　太原工業(yè)學院畢業(yè)論文III目　錄　1 前言 ..............................................................................................................................1 概述 ...........................................................................................................................1 生物降解塑料 ...........................................................................................................1 天然生物降解塑料 ................................................................................................2 化學方法合成生物降解塑料 ................................................................................2 微生物合成生物降解塑料 ....................................................................................4 淀粉基生物降解材料的研究現(xiàn)狀 ...........................................................................5 物理改性 ................................................................................................................5 化學改性 ................................................................................................................5 熱塑性淀粉材料的研究現(xiàn)狀 ...................................................................................6 淀粉塑化機理及制備工工藝 ................................................................................7 熱塑性淀粉流變性能 ........................................................................................9 熱塑性淀粉力學性能 ......................................................................................10 熱塑性淀粉耐水性能 ......................................................................................11 熱塑性淀粉材料存在的問題 ..........................................................................12 本論文的研究目的及主要內(nèi)容 .............................................................................132 實驗部分 ...................................................................................................................15 實驗原料 ................................................................................................................15 實驗儀器 ................................................................................................................15 實驗內(nèi)容及方法 .....................................................................................................15 熱塑性淀粉的制備 ..............................................................................................16 熱塑性淀粉基納米復合材料的制備 ..................................................................16 性能測試與表征 ..............................................................................................16 力學性能 ..........................................................................................................16 耐油性能測試 ..................................................................................................16 SEM 測試 ..........................................................................................................16 XRD 測試 .........................................................................................................163 結(jié)果與討論 ...............................................................................................................17 熱塑性淀粉基納米復合材料的力學性能測試結(jié)果 ............................................17太原工業(yè)學院畢業(yè)論文IV 增塑劑對淀粉復合材料的影響 .........................................................................17 聚乳酸對復合材料的影響 ..................................................................................18 小結(jié) ......................................................................................................................19 混合時間的影響 .....................................................................................................20 密封溶脹時間的影響 .............................................................................................20 熱塑性淀粉的制備溫度 .........................................................................................20 熱塑性淀粉基納米復合材料的制備溫度 .............................................................21 測試結(jié)果 ...