15%唑磷·毒死蜱微乳剂的研制

通过拟三元相图对非离子与阴离子表面活性剂不同复配比例的选择和对乳化剂、溶剂、助溶剂、水质等的筛选,确定了15%唑磷.毒死蜱微乳剂的最佳配方组合,并对该配方的制剂进行了质量指标和田间药效的测试。     

甲醇汽油遇水抗相分离助溶剂的复配研究

通过研究表明,经过复配后的助溶剂对甲醇汽油的抗水性能有良好的改善作用.在混合添加剂总含量4%时最大含水量超过了1%.并得到不同配方的助溶剂在添加相同含量时,最大含水量不同.最终得到了对于M50的最佳配方.在助溶剂为4%时,M50甲醇汽油的最大可含水量为1.2%.通过复配,可以减少助溶剂的用量.不仅节约了成本,还有利于保...     

阿维·锡乳油的研制

简述国内未见报道的阿维.锡复配乳油研制过程,通过溶剂筛选原则确定三元复合溶剂,解决配方难点三唑锡溶解问题,室内实验和大田实验证明该剂型药效优于三唑锡可湿性粉剂。     

10%精喹禾灵微乳剂的配方研究

通过对溶剂、乳化剂及助表面活性剂的筛选和配伍,确定了10%精喹禾灵微乳剂的最优配方:精喹禾灵10%,混合溶剂25%,复配乳化剂22%,乙二醇5%,乙醇4%,消泡剂0.2%,自来水补足100%。对最优配方进行了重复性试验,表明该剂型具有良好的热贮稳定性、低温冷冻稳定性及较宽的透明温度范围,各项理化指标均符合微乳剂产品标准要求。     

轨道交通车辆内饰用水性聚氨酯面漆品质稳定性研究

研究了表面活性剂、复配砂面粉、立体消光浆以及冬夏季差异化配方对聚氨酯面漆品质稳定性的影响。结果表明：使用复配表面活性剂有利于改善涂料细度的稳定性;复配砂面粉可带来稳定的砂面纹理效果与强烈而随和的漆膜质感;采用立体消光浆将大幅度提升漆膜光泽对膜厚变化的稳定性;面漆固化剂组分中助溶剂采用冬夏季差异化配方、固化剂与主漆中—NCO与—OH物质的量比随冬夏季而调整等,均有助于消除环境条件改变对漆膜干燥时间、流平性、消泡效果等性能的影响。     

新型乳油配方及在甜菜安复配乳油中的应用

[目的和方法]基于甜菜安、甜菜宁、精喹禾灵的化学性质,用溶剂-表面活性剂共享系统开发了上述3者的新型复配乳油配方。[结果]新配方在自动分散性上表现优良,稳定性符合国家产品标准要求,对禾本科和阔叶杂草的都有较高防效。[结论]溶剂-表面活性剂共享系统的开发取代了苯类和异氟尔酮、N-甲基吡咯烷酮等高风险有机溶剂在传统乳油中的应用,对当前环保型乳油制剂的发展具有推动作用。     

缓蚀剂三(羟丙基)磷酸酯的合成及多组份复合配方的缓蚀阻垢性能研究

一种以环氧丙烷或丙二醇与五氧化二磷或磷酸,水为溶剂,以酸性催化剂会成三(羟丙基)磷酸酯.以此为基础,与其它缓蚀、阻垢剂进行复配,组成多组份复合配方(以下简称复合配方).该复合配方具有较优异的缓蚀阻垢性能,与锌具有良好的协同效应,符合环保“低磷”要求.     

阿维菌素-哒螨灵微乳剂的研究

进行了一种新型复配微乳剂——阿维菌素—哒螨灵微乳剂的研究。通过对原药、稳定剂、乳化剂以及助溶剂等助剂的选择，确定了适宜的制备工艺，并筛选出优化的配方。检测结果表明，该复合配方乳剂具有贮藏稳定性好、高效安全等特点，具有良好的开发应用前景。     

3.5%阿维菌素·高效氯氰菊酯微乳剂的研究

以阿维菌素和高效氯氰菊酯为有效成分,以起始外观、冷藏外观[(0±2)℃,7 d]、热贮外观[(54±2)℃,14d]和/或稀释稳定性(1∶200倍液)合格和/或流动性好为标准,通过对不同表面活性剂、助剂、助溶剂、水的配方筛选实验,得到3.5%阿维菌素.高效氯氰菊酯微乳剂的最佳制剂配方。优化的配方为:阿维菌素0.5%,高效氯氰菊酯3%,助溶剂6%~10%,乳化剂17%~20%,水余量。实验表明,该复配微乳剂具有贮藏稳定性好、高效安全等特点。     

铝软钎焊剂的研究与制备

探究了铝软钎焊助焊剂中有机酸、有机胺、氟硼酸盐等对其焊接性能的影响。结果表明,铝助焊剂的最佳配方为:有机胺选用三乙醇胺和三乙烯四胺复配,占总含量的20%左右;有机酸选用水杨酸和己二酸复配,占总含量的3%左右;溶剂选用正丙醇和无水乙醇复配,占总含量的22%左右;树脂选用聚乙二醇400,占总含量的25%;活性剂选用氟硼酸锌、氟硼酸亚锡、氟硼酸铵和氟铝酸钾等,占总含量的40%左右;缓蚀剂选用苯并三氮唑,氟碳表面活性剂选用FSN-100。     

聚丙烯/玻璃纤维复合材料注塑工艺条件研究

基于自制的聚丙烯/玻璃纤维(PP/GF)复合材料,研究了复合材料不同配方与注塑工艺之间的关系.结果表明,注射成型加工时,PP/GF复合材料的配方组成不同,对注塑工艺条件和制品的性能都有较大的影响,因此应根据PP/GF复合材料的不同配方采用不同的注塑工艺条件.加有改性剂或偶联剂的PWGF复合材料注塑时的塑化温度、注塑压力、保压压力和保压时间及注射成型后的冷却时间均高于未加改性剂的PP/GF复合材料.     

Phase development in normal and ultra high performance cementitious systems by quantitative X-ray analysis and thermoanalytical methods

Quantitative X-ray diffraction (QXRD) and thermogravimetry (TG) methods are used to determine the phase development up to 28 days of hydration in normal and ultra high performance cementitious systems (UHPC) that do not contain aggregate. The phase development in ultra high performance cementitious formulation is quantitatively and kinetically different from that in normal concrete formulation. This is related to the different components employed and their associated reactions. For both formulations the most remarkable changes of the phase contents are recorded between the first and second hydration day and up to the seventh day. After the seventh day less phase content changes are measured. Because of the non sufficient water amount for hydration, considerable amount of cement remains non hydrated in the UHPC formulation. The portlandite content, which is present in the UHPC specimen, gives evidence for non complete pozzolanic reactions even after 28 days of hydration, whereas the absence of calcite in the UHPC specimen indicates an insignificant carbonation in this specimen.     

3种有机硅助剂对2种水性化农药制剂的增效作用

为评价有机硅助剂对2种水性化农药制剂生物活性的影响,采用室内生物测定,以不含有机硅助剂的制剂为对照,对分别添加有机硅助剂S233、S240、FGM683的30%毒死蜱水乳剂和10%苯醚菌酯悬浮剂室内活性进行了测定。结果表明,3种有机硅助剂对2种水性化制剂的生物活性均具有不同程度的影响,添加有机硅助剂的制剂,其室内活性几乎都高于未添加有机硅助剂的制剂,且添加不同的有机硅助剂,室内活性有较大差异,其中有机硅助剂S233和FGM683的增效作用较为明显,且S233效果最好。     

化妆品中W／O型乳化体性能的研究

通过对所制备的W／O型乳化体系的外观、肤感以及耐寒、耐热稳定性的测试,系统地考察了影响W／O型乳化体性能的各个因素,并把优选的W／O型乳化体配方作为基质制成防晒霜。实验表明：在等量防晒剂下,W／O型防晒霜比O／W型防晒霜具有更加优良的防晒和防水防汗能力。     

10%苯醚甲环唑水乳剂的配方研究

通过对溶剂及表面活性剂的筛选和配伍,采用相转移法,确定了10%苯醚甲环唑水乳剂的最优配方:苯醚甲环唑质量分数为10%;溶剂甲苯质量分数为22%;表面活性剂农乳602?、Span-20以质量分数3:1复配,总质量分数为8%;去离子水质量分数为59.53%。上述配方所制备的10%苯醚甲环唑水乳剂各项指标合格,并且经热贮(54±2)℃14d,冷贮(0±1)℃14d未出现析油、分层现象,所制备的制剂流动性好、倾倒性佳。     

硫酸钠水合盐相变蓄冷材料的制备及性能优化

针对空调系统应用场合,提出一种以十水硫酸钠（sodium sulfate decahydrate,SSD）为主材的相变蓄冷材料新型制备配方,并对材料的各方面性能加以优化。首先采用步冷曲线法确定成核剂比例,消除材料过冷现象,在此基础上研究分析了不同种类、含量的增稠剂[聚丙烯酸钠（PAAS）、聚丙烯酰胺（PAM）、羧甲基纤维素（CMC）、聚阴离子纤维素（PAC）、黄原胶（XG）]对材料相分离及相变潜热的影响,接着加入熔点控制剂氯化铵、氯化钾改变十水硫酸钠的相变温度,调配出满足空调温区的相变材料,最后加入膨胀石墨（expanded graphite,EG）进一步改善材料的导热性和稳定性,并进行了热循环测试。结果表明：添加质量分数3%的硼砂对降低材料过冷度效果最佳;添加质量分数1.0%~2.0%的PAAS可以消除材料的相分离现象,且对材料的相变潜热影响较小。SSD-BPA∶EG质量比为93∶7时材料具有较高的导热性和形状稳定性。经优化后复合相变蓄冷材料的相变温度为7.4℃,相变潜热为117.4J/g,热导率为1.876W/(m·K),经200次循环后材料的相变温度保持稳定,潜热衰减率为14.05%。     

高效氯氟氰菊酯不同剂型对桃小食心虫的防效评价

为明确不同剂型的高效氯氟氰菊酯对苹果树桃小食心虫田间防效的差异,参照农药田间药效试验准则,开展田间防治试验.2年的试验结果表明:微乳剂、水乳剂、乳油3种剂型同期防效差异小于4%,差异不显著,微乳剂、水乳剂可作为乳油的替代剂型.可湿性粉剂药后5～10 d的防效与乳油差异不大,但药后15 d防效比乳油低7%～12%,并表现为差异显著.     

Experimental studies and population balance equation models for breakage prediction of emulsion drop size distributions

A population balance equation (PBE) model for pure drop breakage processes was developed from homogenization experiments and used to investigate model extensibility over a range of emulsion formulation and homogenizer operating variables. Adjustable parameters in the mechanistic breakage functions were estimated from measured drop volume distributions by constrained nonlinear least-squares optimization. Satisfactory prediction of measured bimodal distributions was achieved by the incorporation of two different breakage functions that accounted for large drop breakage due to turbulent shear and for small drop breakage due to collisions between drops and turbulent eddies. Model extensibility to different emulsion compositions and homogenizer pressures was investigated by comparing model predictions generated with the base case parameters to drop volume distributions measured under different conditions. The PBE model satisfactorily accounted for changes in the dispersed phase volume fraction and the interfacial tension with the base case parameters. By contrast, significantly improved predictions for the continuous phase viscosity or multiple formulation variables were obtained through re-estimation of the model parameters using multiple data sets in which the associated variables were systematically varied. The model was not able to satisfactorily predict drop volume distributions resulting from homogenizer pressure changes, perhaps due to the assumption of a constant pressure throughout the homogenizer. We conclude that PBE models of drop breakage can be used to reasonably predict the effects of emulsion formulation variables on drop volume distributions and have the potential for guiding experimental efforts aimed at the design of novel emulsified products.     

MICROWAVE VACUUM DRYING OF POROUS MEDIA: VERIFICATION OF A SEMI-EMPIRICAL FORMULATION OF THE TOTAL ABSORBED POWER

Vacuum drying experiments were performed on a laboratory scale dryer with two porous materials: a packing of initially saturated glass beads and of unsaturated pharmaceutical granules. Several incident powers and two vacuum pressure levels were tested in order to demonstrate different drying mechanisms. The drying kinetics, temperature of the product and the absorbed power are presented and the coupling between the drying rate and the absorbed power is shown. A semi-empirical formulation of the total absorbed power is proposed taking into account the water content, the temperature and the dielectric properties of each phase. This formulation is based on a quasi-static assumption which allows the local electric field inside the material to be expressed with an analytical equation.