V2O5/g⁃C3N4催化剂的制备及其模拟油中硫化物的脱除

以三聚氰胺、偏钒酸铵、硼酸为前驱体,通过煅烧法制备V₂O₅/g⁃C₃N₄催化剂。采用XRD、FT⁃IR、XPS、SEM和BET等技术对催化剂的结构与形貌进行表征。以V₂O₅/g⁃C₃N₄为催化剂,乙腈为萃取剂,H₂O₂为氧化剂对模拟油中二苯并噻吩（DBT）的脱除进行考察。探究了反应温度、催化剂质量、萃取剂体积、n(H₂O₂)/n(S)以及不同硫化物等因素对脱硫效果的影响。在模拟油体积为5.0 mL、萃取剂乙腈体积为3.0 mL、n(H₂O₂)/n(S)=8、催化剂质量为0.02 g、反应温度为30 ℃和反应时间为60 min的最佳条件下,DBT的脱除率达到91.9%,经过5次催化剂再生后脱硫率仍可以达到85.7%。     

Fluorescent Brightener 28 Removal by Ozonation or Advanced Oxidation Processes (O3/H2O2)

The aim of this work is to study the reaction of ozone and combined ozone/hydrogen peroxide mixtures with the fluorescent brightener 28 in dilute aqueous solution using controlled experimental conditions. The kinetics were also evaluated under various experimental conditions. The main ozonation by-products have been identified by High Pressure Anionic Exchange Chromatography (HPAEC) and Gas Chromatography coupled with Mass Spectrometry (GC-MS) techniques and a reaction pathway is proposed. In order to confirm this mechanism, melamine and s-triazine have been treated under the same reaction conditions and their decomposition pathways were studied.     

三聚氰胺的改性及其应用

综述了三聚氰胺对脲醛树脂、酚醛树脂的改性以及改性三聚氰胺在涂料、板材等方面的应用。三聚氰胺可以和其它聚合物发生聚合反应,形成立体网状结构,提高聚合物的强度、韧性、阻燃性等。三聚氰胺可作为改性剂对许多聚合物进行改性,以提高其性能。     

阻燃性软质聚氨酯泡沫塑料的研制

以自制的聚醚多元醇为原料，加入经粉碎并表面处理的三聚氰胺和阻燃剂Ｔ２０１制得阻燃性软质聚氨酯泡沫塑料。系统地考察了配方中的两种阻燃剂用量，特种聚醚多元醇和泡沫密度对泡沫塑料阻燃性和物理性能的影响。     

计算机单元模拟在三聚氰胺装置冷气风机分析上的应用

简述了三聚氰胺生产流程、冷气风机的作用和结构,介绍了冷气风机密封泄漏的计算机单元模拟过程,提出了以风机进出口温差作为判断其密封泄漏量大小的依据。     

汽车刹车片用改性酚醛树脂的生产

在原有的酚醛树脂生产设备上，用腰果壳油和三聚氰胺对酚醛树脂进行改性，制得的改性树脂具有较好的软化点、聚合速度、挥发度和游离酚等性能；并且热分解温度较普通酚醛树脂大大提高。用它作胶粘剂生产的汽车刹车片，冲击强度增大：磨损率降低、摩擦性能提高、产品成本也大为降低。     

Environmental etch performance, and scratch and mar of automotive clearcoats

Environmental etch damage to automotive coatings, and scratch and mar of these coatings are an important element of customer satisfaction as well as a significant warranty repair consideration for automotive companies. The conditions that result in environmental etch are examined and a laboratory test proposed. Data from this test are compared to automotive hoods exposed in Florida. The performance of various crosslinking chemistries is discussed and the requirements for improved environmental etch are outlined. Scratch and mar performance of these systems is also reviewed. We have found that coatings respond to physical stress by elastic recovery, by plastic flow and by brittle fracture. Classifying types of damage in this way is important for understanding the chemistry needed for improved scratch and mar of coatings.     

三聚氰胺分子印迹聚合物的合成与光谱学特性

采用非共价印迹法,以三聚氰胺为模板分子,甲基丙烯酸为功能单体,乙二醇二甲基丙烯酸酯为交联剂,合成了三聚氰胺分子印迹聚合物．实验表明该印迹聚合物对甲醇溶液中三聚氰胺具有良好的选择性结合能力,对液态奶中的三聚氰胺的富集率可达98％以上．并结合紫外光谱及红外光谱对分子印迹聚合物的合成及结合机理进行了初步解析．     

反应媒循环法从湿法磷酸制饲料磷酸二铵的实验研究

本文对用三聚氰胺（ｍｅｌ）作反应媒，直接采用～２０％Ｐ２Ｏ５的低浓度湿法磷酸为原料，把净化与产品生产结合起来，生产出饲料磷酸二铵的新工艺进行了实验研究。结果表明：在适宜工艺条件下，制得的磷酸二铵产品质量达到了饲料级要求。此法具有工艺过程简单，能耗低，能实现“肥盐结合”等特点，是一条适合我国资源特点的新颖的技术路线。     

Preparation of iron and nitrogen co-doped carbon material Fe/N-CCM-T for oxygen reduction reaction

In this paper, iron and nitrogen co-doped carbon material with nanotube structure (Fe/N-C_CM-T) was synthesized by pyrolyzing a mixture of Fe salt, chitosan and melamine and displayed high electrocatalytic performance for oxygen reduction reaction (ORR). The structure of the Fe/N-C_CM-T was characterized and their ORR performance in alkaline media was investigated by linear sweep voltammetry, cyclic voltammetry and chronoamperometry. Fe/N-C_CM-T displayed better ORR performance than other carbon materials like Fe/N-C_C-800. The Fe/N-C_CM-800 with a large surface area (302.5 m²/g) especially exhibited the best ORR electrocatalytic performance among the prepared carbon materials, which was also proved by its similar Tafel slope (76 mV decade^?1) to Pt/C catalyst (74 mV decade^?1). Fe/N-C_CM-800 showed similar ORR activity as commercial Pt/C catalyst, but superior tolerance to methanol and stability. Such high ORR performance of the Fe/N-C_CM-T can be attributed to its nanotube structure, high specific surface area (SSA), high graphitic-N and pyridinic-N contents.