乙酰化柠檬酸三（2—乙基己基）酯的合成及应用

本文阐述了乙酰化棕檬酸三（２－乙基已基）酸（ＡＴＯＣ）的化学合成原理、生产工艺及中试结果，并扼要地介绍了ＡＴＯＣ作为ＰＶＣ无毒增塑剂的优良性能及应用效果。     

聚氯乙烯用环保型增塑剂的研究进展

目的 综述了环保增塑剂制备的新方法与应用研究,为环保型增塑剂在聚氯乙烯中的应用提供一定的理论依据。方法 根据环保型增塑剂化学结构和功能的不同对其进行了分类,重点介绍国内外环保增塑剂的最新研究进展,详细介绍环氧植物油类、聚酯类、柠檬酸酯类、偏苯三酸酯类、环己烷二羧酸酯类等环保型增塑剂在聚氯乙烯中的应用研究,指出环保增塑剂需要解决的主要问题,并以此为基础对环保型增塑剂在聚氯乙烯中的发展趋势进行展望。结果 环保型增塑剂增塑改性的聚氯乙烯在力学性能、耐热性能、加工性能和稳定性等方面都媲美或优于邻苯二甲酸酯类增塑剂。结论 环保型增塑剂可替代具有潜在危害的邻苯二甲酸酯类增塑剂,具有广阔的应用前景。     

低聚物增塑剂研究进展

本文主要论述了低聚物增塑剂的流变特性和近年来国内外低聚物增塑剂应用的发展概况,全文引用参考文献25篇。     

增塑剂乙酰聚合甘油不饱和脂肪酸多酯的合成及应用

以自制二聚甘油和油酸为原料进行酯化反应合成聚甘油不饱和脂肪酸多酯,再与乙酸酐反应得到乙酰聚甘油不饱和脂肪酸多酯。采用单因素试验研究反应温度、反应时间、聚甘油与油酸摩尔比、催化剂用量对酯化率的影响,确定最优合成工艺条件为反应温度215℃、反应时间3 h、油酸与聚甘油摩尔比4∶1、催化剂用量1.5%,该条件下酯化率为87.7%。采用红外光谱、热重分析、凝胶渗透色谱对产物进行了表征。热重分析表明当温度达到500℃时,残留质量为0.21%;凝胶渗透色谱分析结果表明,珚Mn为2354,珚Mw为3050,珚Mz为6549,相对分子质量分布指数为1.2957;拉伸强度为(22.69±3.10)MPa,断裂伸长率为(65.21±5.25)%。     

乙酰柠檬酸三丁酯合成工艺中催化剂的应用研究

乙酰柠檬酸三丁酯是一种优良的无毒增塑剂,以其绿色环保的特点被广泛应用于各个领域。催化剂的选用是制取乙酰柠檬酸三丁酯工艺中重要一个环节。以溶胶法负载磷钨酸制取的固化酸催化剂,酯化率高,重复使用率高,是一款理想的酯化催化剂。     

我国医用聚氯乙烯增塑剂的发展现状

我国医用聚氯乙烯(PVC)以可致癌的邻苯二甲酸二辛酯(DOP)为主增塑剂,这严重影响了国内人民的健康和医用PVC行业的发展。通过对国内外各新型环保增塑剂的比较可知:无毒环保的乙酰柠檬酸三丁酯(ATBC)适合作为我国医用PVC制品的主增塑剂。这为改善医用PVC制品使用者的健康状态,加快医用环保PVC行业的发展提出了可行性。     

增塑剂在聚乳酸中的应用研究进展

主要介绍了国内外增塑剂在聚乳酸中的最新研究进展。     

烟用水基胶中新型增塑剂的GC/MS测定

本文采用气相色谱/质谱/选择离子监测法测定了26个烟用水基胶中新型增塑剂(TBC、ATBC、DEDB),结果表明烟用水基胶中新型增塑剂的GC/MS测定,一方面提高了烟用水基胶的质量监控,另一方面对于烟用水基胶的质量稳定性控制具有重要意义。     

邻苯二甲酸酯类增塑剂检测技术研究进展

着重介绍近年来邻苯二甲酸酯类化合物检测技术的研究进展,主要从前处理技术和检测方法两个方面进行归纳和总结,并对存在的问题及前景进行了探讨和展望。     

Characterization of kenaf fiber composites prepared with tributyl citrate plasticized cellulose acetate

Cellulose bio-composites have been formed with many matrix polymers; however, a cellulose based matrix offers advantages of enhanced compatibility and environmental conformity. The aim was to use cellulose acetate as matrix since it is readily soluble and more flexible compared with cellulose. Kenaf (Hibiscus cannabinus) was selected as the reinforcement material. Cellulose acetate was dissolved for solution impregnation of the fibers. Plasticized cellulose composites were prepared by addition of tributyl citrate (TBC) to cellulose acetate solutions prior to fiber impregnation. Composites were then compression molded for compaction and fabrication of the composites. The surface morphology, thermal stability and mechanical properties of the kenaf-cellulose acetate composites were characterized. Thermal stability of the composites was limited by evaporation of moisture and TBC, followed by elimination of acetic acid for cellulose acetate. Scanning electron microscopy provided a morphological examination of the composites. Mechanical property measurements demonstrated that modulus of cellulose acetate was increased by kenaf, though the composites were brittle without TBC plasticizer addition.     

Microwave-assisted green synthesis of MnO2 nanoplates with environmental catalytic activity

In this paper, MnO₂ nanoplates were synthesized in aqueous solution under the microwave irradiation, without using any templates, catalysts, and organic reagents. The as-prepared MnO₂ nanoplates were systematically characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), and transmission electron microscopy (TEM), high-resolution TEM (HRTEM), Fourier transform infrared (FT-IR) spectroscopy, differential scanning calorimetry (DSC) and thermo-gravimetric (TG) analysis, and nitrogen sorption measurements. Microwave irradiation could produce MnO₂ with uniform size and well-defined shape as well as high crystallinity. On the basis of experimental results, a possible formation mechanism of MnO₂ nanoplates was proposed. Furthermore, the resulting MnO₂ nanoplates were found to exhibit remarkable environmental catalytic performance in degradation of Rhodamine B (RhB) in aqueous solution, indicating these MnO₂ nanoplates is very promising for wastewater treatment.     

One-pot green synthesis of Fe-ZSM-5 zeolite containing framework heteroatoms via dry gel conversion for enhanced propylene selectivity of catalytic cracking catalyst

Journal of Materials Science - Development of a sustainable route for the synthesis of Fe-ZSM-5 zeolites is important due to their diverse applications in different fields. Herein, we report a...     

Synthesis and evaluation of N,N-dibutylundecenamide as new eco-friendly plasticizer for polyvinyl chloride

Journal of Materials Science - Tertiary fatty amide, namely N,N-dibutylundecenamide (DBUA), has been synthesized and evaluated as potential plasticizer for polyvinyl chloride (PVC). Homogeneous...     

PPV材料的合成研究进展

阐述了聚对苯撑乙烯 (PPV)及其衍生物作为发光二极管 (LED)发光层材料的合成研究 ,详细归类了常见的合成方法 ,为今后该领域新材料的合成指明了方向。     

A green method for synthesis of silver nanodendrites

A simple, green method was developed for the synthesis of silver nanodendrites by an aqueous chemical route. This method involves the reduction of silver nitrate with absolute alcohol using polyvinyl pyrrolidone (PVP) as the surfactant. UV–vis absorption spectra, X-ray diffraction patterns (XRD) and energy dispersive spectrometry (EDS) suggest the formation of Ag nanoparticles. Transmission electron microscopy (TEM) images show the shape and sizes of the nanoparticles. During the synthesis, it was found that the morphology and size distribution of the as-prepared silver nanoparticles varied with the concentration of the precursor metal salts, reaction time and surfactant ratios. The formation mechanism of Ag nanodendrites was determined based on the investigation of the above reaction parameters. Simple methods, nontoxic chemicals and environmentally benign solvents make this synthesis ideally suited for industrial production.