原位法制备改性白炭黑研究

以水玻璃和硫酸为原料,采用原位法制备了表面改性白炭黑,比较了六甲基二硅胺烷、三甲基氯硅烷、聚乙二醇及正丁醇4种改性剂的改性效果,对六甲基二硅胺烷改性条件作了正交优化分析,并测定了最优条件下改性白炭黑的各项质量指标。结果表明,六甲基二硅胺烷表面改性效果较好,其最佳工艺条件为:搅拌速率400r/min、温度75℃、改性剂添加量1.2 mL、反应时间10min。此条件下制备的原位改性白炭黑对邻苯二甲酸二丁酯(DBP)的吸收值为2.64mL/g,相对于原位改性前DBP吸收值增加了70%,其各项指标符合HG/T3061-2009,属于B级产品。     

自回归神经网络在主汽温控制中的应用

提出了自回归神经网络拓朴结构及其训练算法,把具有两个“自回归神经网络”的复合控制系统用于主汽温控制,一个作为辨识器,另一个作为控制器。仿真结果验证了该控制系统的优越性能,可知在过程控制领域中,神经网络在处理困难问题上,有良好的发展潜力。     

基于动态BP网络的实验电炉温度控制系统

针对一类不允许出现超调的工艺参数，提出了采用动态BP网络对工艺参数进行控制，可以达到良好的效果。并以实验电炉为对象，用工控机对其炉温进行控制，结果表明，采用动态BP网络进行控制，可以无超调地无限逼近给定值，控制精度高，控制时间较短。因此可以认为，用动态BP网络对这一类工艺参数的控制是有效的。     

短程蒸馏工艺参数对二元组分分离效果的影响

应用刮膜式短程蒸馏装置以邻苯二甲酸二甲酯(DMP)和邻苯二甲酸二丁酯(DBP)二元组分为对象进行系列实验。重点考察了进料速率、蒸馏温度、蒸馏压力和刮膜器转速对二元组分分离效果的影响。实验结果表明:在实验所取数值范围内,蒸馏温度和蒸馏压力为二元组分分离效果的主要控制因素,而进料速率和刮膜器转速对于分离效果的影响相对不明显。     

Pharmacokinetics of Dibutyl Phthalate (DBP) in the Rat Determined by UPLC-MS/MS

Dibutyl phthalate (DBP) is commonly used to increase the flexibility of plastics in industrial products. However, several plasticizers have been illegally used as clouding agents to increase dispersion of aqueous matrix in beverages. This study thus develops a rapid and validated analytical method by ultra-performance liquid chromatography with tandem mass spectrometry (UPLC-MS/MS) for the evaluation of pharmacokinetics of DBP in free moving rats. The UPLC-MS/MS system equipped with positive electrospray ionization (ESI) source in multiple reaction monitoring (MRM) mode was used to monitor m/z 279.25→148.93 transitions for DBP. The limit of quantification for DBP in rat plasma and feces was 0.05 μg/mL and 0.125 μg/g, respectively. The pharmacokinetic results demonstrate that DBP appeared to have a two-compartment model in the rats; the area under concentration versus time (AUC) was 57.8 ± 5.93 min μg/mL and the distribution and elimination half-life (t_1/2,α and t_1/2,β) were 5.77 ± 1.14 and 217 ± 131 min, respectively, after DBP administration (30 mg/kg, i.v.). About 0.18% of the administered dose was recovered from the feces within 48 h. The pharmacokinetic behavior demonstrated that DBP was quickly degraded within 2 h, suggesting a rapid metabolism low fecal cumulative excretion in the rat.     

酞酸二丁酯在铁(Ⅲ)-草酸盐配合物体系中的光降解

在铁(Ⅲ)-草酸盐配合物体系中考察pH值,铁(Ⅲ)／草酸盐(Fe(Ⅲ)／Ox)配比,酞酸二丁酯(DBP)初始浓度对DBP光降解的影响,结果表明pH=3．5和Fe(Ⅲ)／Ox配比为10．0／120．0μmol／L时具有较强的氧化能力,其光解反应符合表观一级反应动力学规律。并且利用气相色谱-质谱联机分析确定DBP光降解得中间产物,揭示DBP光降解的主要反应途径是OH自由基提取烷基上与羧基相连的α-H,生成醇(ROH),再分解成为酞酸和二醇,进一步氧化脱羧,直至矿化。     

单模聚焦微波合成邻苯二甲酸二正丁酯

用Discover微波精确有机合成系统，以邻苯二甲酸酐、正丁醇为原料，一水合硫酸氢钠为催化剂合成邻苯二甲酸二正丁酯。考察了催化剂用量、微波辐射的功率和时间、反应物料配比对苯酐的转化率的影响。当n(正丁醇)：n(邻苯二甲酸酐)=0．13：0．05，催化剂0．60g，微波辐射功率150w，辐射时间15min时，转化率达97．8％。     

增塑剂DBP对VAE乳液粘度的影响

应广大VAE乳液用户要求 ,我们对增塑剂DBP对不同型号VAE乳液粘度影响作了研究 ,并经实验得出了增塑剂的添加阈值。或VAE乳液应用具有指导意义。     

邻苯二甲酸酯类增塑剂的生产工艺

邻苯二甲苯酸酯类增塑剂主要包括邻苯二甲酸二辛酯(DOP)、邻苯二甲酸二丁酯(DBP)和邻苯二甲酸二异丁酯(DIBP)3种。综述了非酸法DOP生产工艺以及酸法DBP和DIBP生产工艺。     

Controlled growth of dibenzotetraphenylperiflanthene thin films by varying substrate temperature for photovoltaic applications

We investigate the growth of a novel organic photovoltaic material, dibenzotetraphenylperiflanthene (DBP) thin film by ultra-high-vacuum evaporation. It is shown that the surface morphology and crystalline order of DBP thin films are greatly changed by growth temperature. Especially, at 90 °C, the DBP exhibits a unique orientated growth with long well-directional grain structures. The power conversion efficiency of the device using DBP grown at 90 °C is enhanced by a factor of 61% relative to that of the device using DBP grown at room temperature due to the improvements in photocurrent, open-circuit voltage and fill factor. The results indicate the feasibility of the controlled growth of DBP thin films, which plays a crucial role in improving the performances of photovoltaic devices.