增强反应法制备的废轮胎胶粉增韧聚苯乙烯

用增强反应法制备机械破碎的废胎胶粉增韧的聚苯乙烯复合材料研究表明,当胶粉质量分数为40%时,其冲击强度比纯聚苯乙烯提高10倍,而拉伸强度比纯聚苯乙烯仍保持50%以上.胶粉粒度为40目时,增韧效果最佳,粒度分布对增韧效果影响不大.这表明用增强反应法制备机械破碎的废轮胎胶粉增韧的聚苯乙烯复合材料时,不必过分磨细废胎胶粉,也不必过分追求胶粉粒度均一.     

BZ化学振荡法测定对氨基水杨酸钠

选择了四氮杂大环铜催化的BZ化学振荡体系来测定对氨基水杨酸钠。该体系为:NaBrO3-苹果酸-H2SO4-[CuL](ClO4)2体系,其中L为5,7,7,12,14,14-六甲基-1,4,8,11-四氮环杂十四-4,11-二烯。在实验中我们发现对氨基水杨酸钠的加入明显的改变了振荡体系的振幅和周期,浓度的对数与振幅的改变值A在4.97×10-7～1.96×10-4mol/L的浓度范围内呈现良好的线性关系。校正因子r=0.991 5,检测下限为1.96×10-7mol/L,相对标准偏差为4.6%。因此,我们建立了一种BZ化学振荡法测定对氨基水杨酸钠含量的分析方法,同时研究了该振荡体系和对氨基水杨酸钠之间的作用机理。     

一种新型轮胎硫化机中心机构工作性能的模拟研究

中心机构是轮胎定型硫化机的重要部件,目前现有轮胎定型硫化机的进水口和出水口平行设置在中心机构的底部,当过热水充满整个胶囊后开始在胶囊里进行循环时,位于中心机构底部位置的过热水不能充分地与顶端的液体进行热量置换就流出胶囊,造成轮胎胎侧上下两端温差较大,整个胶囊内的热交换效率低下,轮胎硫化不均匀。因此,本文提出一种新型轮盼定型硫化机中心机构,并且详细阐述其作用机理,利用FLUENT模拟软件与现有的轮胎定型硫化机中心机构的工作性能进行比较,以更好地说明其能够明显改善轮胎的硫化效果。     

浅谈水质稳定剂与高频水处理仪

目前中小型化肥厂普遍采用水质稳定剂处理补充水和循环水，尽管提高了水的利用率，却仍有少量污水排放；使用高频水处理仪技术，不但水质达标，且经济合理。     

全反式维A酸的合成

全反式维A酸是维A醇的一个前体化合物,其合成方法一般是采用维生素A进行氧化制得,但收率低,副产物多。采用wittig反应合成路线,以C15三苯基膦盐与C5醛酯为原料合成全反式维A酸,经优化后可以得到较高纯度、较高收率的全反式维A酸,且反应步骤少,反应条件温和,后处理简单,设备投资小。     

Synthetic Effects of Frequency and Duty Ratio on Growth Characteristics,Energy Consumption and Corrosion Properties of Microarc Oxidized Coating Formed on Ti6Al4V

The synthetic effects of frequency and duty ratio on growth characteristics and corrosion properties of coating on Ti6 Al4 V fabricated by microarc oxidation are investigated comprehensively. Under the condition of uniform cumulating time of positive impulse width, the essence of altering frequency and duty ratio to determine the formation of coating is to vary the duration and interval time of positive pulse. The growth of coating is mainly controlled by duration time of positive pulse and hardly correlated to the interval time of positive pulse, while both duration and interval time of positive pulse have few influences on the morphology and phase structures of coating. The dynamic current is related to positive impulse width and the ratio of positive pulse on-time to pulse off-time. Regardless of uniform duration or interval time of positive pulse, the energy dissipation presents a descending tendency. The relationship between energy consumption and anticorrosion performance is contradictory, and obtaining excellent corrosion resistance is bound to sacrifice lots of energy. The duty ratio and frequency can be designed purposefully to realize the optimal process.     

油田全生命周期价值增值策略分析

基于油田全生命周期的技术和价值双重属性,通过关键技术和经济指标动态综合评价,阐述了勘探开发活动中从资源量向储量、产量及现金流转化的开发策略和流程方法,形成了油田全生命周期实现油田资产价值增值的全面管理策略。分析表明,可采储量评价、产能优化部署和投资时间价值最大化是价值增值管理的重要内容。喀麦隆X油田通过实施基于R因子约束的多阶段产能滚动部署的价值管理策略,充分发掘了新老资产的协同效益,在技术上确定了该油田的储量和产能等油藏参数,在商务上探索了油田全生命周期内实现自我滚动发展的新模式,实现了存量资产和增量资产共同增值的价值管理目标,避免了常规勘探开发建产模式投入大、周期长、储量时间价值弱化且受制于区块生命周期的问题,对国际勘探开发项目全生命周期的价值管理具有积极的参考价值。     

Electroless ultrasonic functionalization of diamond nanoparticles using aryl diazonium salts

We report a novel and very handful strategy for the functionalization of diamond nanoparticles (NDs), based on the ultrasound-assisted grafting of aryl groups from the electroless reduction of diazonium salts. For this study, 4-nitrobenzenediazonium salt was used as a model molecule and the reaction was investigated in neutral and acidic aqueous media. Spectroscopic evidence for the successful attachment of aryl groups to nanodiamonds (NDs) was given by IR and XPS which clearly detect characteristic NO₂ peaks. Moreover, the absence of any peaks from the ⁺N≡N group in the IR spectra is a clear indication of the chemical reduction of the parent diazonium salt at the surface of NDs. This spontaneous chemical modification of NDs by aryl diazonium salts was confined to the surface of the ND particles; indeed, XRD measurements have shown that the crystalline structure of the bulk of the particles was unaffected. It opens up new possibilities towards the control of the surface chemical composition of NDs using simple protocols operated in very soft conditions, i.e. in water at room temperature. It shows conclusively that the chemistry toolbox of experts interested in nanodiamonds should contain aryl diazonium salts, given their versatility in forming active platforms.     

有减水作用的新型高效陶瓷助磨剂研制

利用曼尼奇反应原理 ,制备了多胺基磷酸钠陶瓷助磨剂 ,采用红外光谱、差热分析等对合成的助剂进行了表征 ;此外 ,通过对氧化铁以及石英滑石等原料的助磨应用测试表明 :合成的助剂是一种高效陶瓷助磨剂 ,同时还具有减水作用。     

碳气凝胶的常压干燥制备及结构控制

研究了碳气凝胶在常压条件下的制备过程和干燥方法. 用扫描电镜、比表面测量仪及孔径分布仪对其结构进行了表征与测试. 通过改变催化剂和溶剂的用量,可以实现碳气凝胶的颗粒直径及孔洞由纳米到微米级的连续调节. 通过降低催化剂浓度并以丙酮进行溶剂替换,成功实现了碳气凝胶的常压干燥. 常压干燥样品具有250~650 kg/m3的低密度和250~550 m2/g的高比表面积. 分析了其溶胶-凝胶反应机理,围绕毛细压力和材料强度等方面探讨了其常压干燥的实现途径.