Their properties have been investigated by using scanning electronic microscopy ( sem ) , differential scanning calorimetry ( dsc ) , x - ray diffraction ( xrd ) , thermogravimetry - differential thermal analysis ( tg - dta ) , infrared spectroscopic analysis ( ir ) , and gas chromatography ( gc ) , etc . the effects of the mulser ' s stirring rate and the emulsifier concentration on the properties of encapsulated pcms have been systematically studied , and nanopcms have been obtained by increasing the stirring rate or the emulsifier concentration . the influences of different nucleating agents on micropcm performances have also been investigated in detail to search for a suitable nucleating agent to prevent micropcms from super - cooling 首先,系统研究了乳化机转速和乳化剂浓度对胶囊性能的影响,并通过提高转速或乳化剂浓度获得相变材料纳胶囊;其次,系统研究了不同成核剂对微胶囊性能的影响,找到合适的成核剂抑制了相变材料微胶囊的过冷现象;再次,详细研究了环己烷对胶囊性能的影响,并通过添加适量环己烷提高了相变材料微胶囊及纳胶囊的耐热温度。
The primary theory of absorption and desorption was also explained . the effects of primary process parameters , such as hydrogen pressure , time and temperature on the magnetic properties of ndfeb have been researched . the structure and magnetic properties have been analyzed by means of optical metallographic microscopy , scanning electronic microscopy , x - ray diffraction analysis , infrared oxygen detector and magnetic properties measurement 本文设计了烧结ndfeb的氢爆制粉设备,对设备调试以及使用过程中出现的主要问题进行了简要的说明,提出了一系列解决方法;阐述了吸氢、脱氢的基本原理;研究了氢气压力、通氢时间、氢爆温度等基本工艺参数对磁性能的影响;利用金相显微镜和扫描电子显微镜, x射线衍射分析,红外线测氧分析及综合磁性测量仪等手段分析了材料的组织结构和磁性能。
The obtained microspheres modified pla membranes with different surface characters were proved by scanning electronic microscopy ( sem ) , clsm and stability tests . cytocompatibility tests of the microspheres modified pla membranes showed that the cytocompatibility of modified pla membranes with positive charges was better than that of modified pla membranes with negative charges or neutral surface 扫描电镜( sem ) 、激光共聚焦显微镜( clsm )以及稳定性测试分析结果反映出采用表面截留法能成功制备得到具有不同表面性质的功能微球改性聚乳酸组织工程材料表面。
The structure of fertilizers was studied by scaning electronic microscopy ( sem ) , and the nutrient release characteristics were studied using water dissolution rate method and soil column leaching method . [ result ] the 24 hours n water dissolution rates of sapcus were 18 . 22 % - 83 . 87 % , and n accumulated leaching rates in four weeks were 40 . 91 % - 65 . 38 % , which decreased by 5 . 21 % - 40 . 68 % compared with that of urea under the same experiment conditions 方法以不同类型和吸水倍率的高吸水性树脂为包膜材料,以大颗粒尿素和改性矿物包膜尿素为原料肥料,研制出高吸水性树脂单层包膜尿素、高吸水性树脂复式包膜尿素系列产品,利用电子扫描电镜研究了其结构特征,并以水中溶出率法和模拟土柱淋溶法研究其养分释放特性。