两种混合单元混合机理的数值模拟

为了研究SV型和SX型混合单元在全静态乳化器的混合机理,使用群体平衡模型对乳化器内部流场进行模拟分析。结果表明,SV型与SX型混合单元的混合机理是油相与水相材料通过混合单元时其空间流动方向改变,在流场内形成大量的漩涡,从而达到乳化的目的;通过比较流体在经过SV型和SX型混合单元后的水相索特平均直径(d_(32)),得出SV型混合单元的乳化效果更强,但同时消耗更多的能量,压降更大。     

大豆油体蛋糕的制作及品质分析

目的 为比较大豆油体、单甘脂和蔗糖酯三种成分对蛋糕烘焙学特征的影响。方法 本文通过对蛋糕面胚比容、质构，蛋糕面糊比重、黏度和表面气孔特性以及理化指标检测，并对蛋糕进行感官评定进行测试。结果 结果表明，大豆油体最适添加量为4.5%。大豆油体能增加蛋糕的黏度，有助于形成稳定的乳化体系，并且大豆油体蛋糕的酸价、过氧化值和反式脂肪酸检测结果符合国家标准。结论 大豆油体和乳化剂能显著提高豆乳奶油蛋糕的比容，降低硬度，从而改善蛋糕的品质特性。     

Conversion of aqueous extracts from thermochemical treatment of bagasse into functional emulsifiers

Synthetic emulsifiers in food industries are being replaced with a customer-friendly food ingredient that is derived from biomass using sustainable green technologies. After hydrothermal liquefaction treatment, raw bagasse (21%), pith (26%), and rind portions (25%) were obtained with reduced ash contents. As aqueous extracts, with oligosaccharides and lignin residues, it was used in the preparation of oil-in-water emulsions with 5% soybean oil. Results showed that the emulsions stabilised the oil droplets with particle size between 11 and 17 µm by steric repulsion with raw bagasse-stabilised emulsion showing a better stability at 25 °C (31 days). It was demonstrated that raw bagasse extracts, without alteration, maybe a potential unconventional source for food-grade emulsifiers by integrating a versatile thermochemical conversion of waste without the use of chemicals.     

A novel polysaccharide prepared from Chrysanthemum morifolium cv. Fubaiju tea and its emulsifying properties

In this study, a novel chrysanthemum polysaccharide (CP) was obtained and investigated from Chrysanthemum morifolium tea in Hubei province, China. Molecular characterisation and emulsifying properties of the CP were elucidated. The effects of different factors, including storage time, metal ions, pH value and heat treatment, were studied on the stability of emulsion. Results showed that the mean particle diameter (MPD) (d₃₂) varied from 5.54 to 0.49 μm with the polysaccharide concentration ranging from 0.5wt% to 3.0wt%. The MPD (d₃₂) of emulsions stabilised by chrysanthemum tea polysaccharide (ECP) was smaller than that of GA at 2wt%, and the MPD (d₃₂) of ECP remained stable with no stratification occurred at 25 °C for 10 days. ECP also showed good stability under acidic conditions (3.0–7.0). With increase of Na⁺ and Ca²⁺ concentration, MPD(d₃₂) and zeta potential values raised significantly, from 2.24 to 7.24 μm and from −40.52 to −35.35 mV respectively. After high-temperature heat treatment, MPD (d₃₂) and zeta potential showed no significant change, indicating ECP presented good storage stability. In conclusion, CP helped stabilised emulsions that could be used as a natural emulsifier for future application.     

浮选药剂的作用及应用

主要介绍了浮选药剂的类型,并着重分析了一些常见浮选药剂的特点和作用,以及这些药剂在选煤中的应用。     

道路用沥青乳液综述

简要介绍了道路用沥青乳液的分类，重点讨论了沥青乳化剂的选择和沥青乳液稳定性的影响因素，进一步探讨了今后路用沥青乳液的发展方向。     

丙烯酸酯无皂乳液的制备及性能研究

用自制的马来酸单胺型可聚合乳化剂制备丙烯酸酯无皂乳液,研究了乳化剂用量及固含量对乳液性能的影响,并考查了聚合物乳液的表面张力、耐水性和抗电解质稳定性,用粒度分析仪、红外、DSC对聚合物乳液进行表征.结果表明,与传统乳液聚合相比,所合成的胶乳耐电解质、耐水性都有明显改善,乳液的Tg为26.41℃.     

提高乳化沥青乳化效果的研究

针对乳化沥青乳化困难、乳液贮存稳定性差等问题,以乳液性能、混合料施工性能及路用性能为基础,并结合理论,分析研究了乳液制备过程中常出现的技术问题,以及影响乳液乳化效果的乳化剂因素,给出了相应的解决措施及最佳乳化剂复配方案。     

炸药乳化器安全监测方法及其发展

文章回顾了几种现行的乳化器安全运行检测方法,分析了各自的优缺点,介绍了一种使用现代振动监测诊断技术对乳化炸药生产线的关键设备乳化器进行在线安全监测的基本原理和功能,讨论了乳化器安全监测系统的发展方向.