搜索结果: 16-30 共查到“知识库 化学工程基础学科”相关记录844条 . 查询时间(2.172 秒)
Analysis of atmospheric visibility degradation in early haze based on the nucleation clustering model
Early haze Initial nucleation process Heterogeneous cluster Visible-light absorption
2023/3/1
The initial nucleation of ultrafine particle recently attracts more attention as a key factor in visibility degradation during early haze. In this study, we have performed Density Functional Theory (D...
Condensation heat transfer of steam on vertical dropwise and filmwise coexisting surfaces with a thick organic film promoting dropwise
蒸汽 滴状 膜状 DFC 冷凝传热
2023/3/1
This article describes an experimental investigation of the condensation heat transfer of steam on dropwise and filmwise coexisting (DFC) surfaces, on which dropwise and filmwise exist simultaneously ...
Effects of hydrophilic surface on heat transfer performance and oscillating motion for an oscillating heat pipe
Oscillating heat pipe (OHP) Oscillating motion Heat transfer Superhydrophilic surface Hydrophilic surface
2023/3/1
In this paper, a series of experiments were performed to investigate the effects of superhydrophilic and hydrophilic surfaces on the heat transfer performance and slug motion for oscillating heat pipe...
Effect of Morphology of Nano-Structured Surfaces on Anti-Icing Performance
nanowires superhydrophobic surface anti-icing impacting bouncing
2023/3/1
Droplets bouncing off cold surfaces before being frozen is one way to achieve anti-icing, in which process superhydrophobic surfaces have been proven to play an important role. By using template-assis...
Heat Transfer Enhancement of Horizontal Oscillating Heat Pipes With Micro-/Nanostructured Surface
oscillating heat pipes (OHPs) micro-/nanostructured surface horizontal heating direction
2023/3/1
For oscillating heat pipes (OHPs) with low turn number (<9) positioned in the horizontal direction, the working fluid could not easily flow back to the evaporator due to the absence of gravity. Based ...
Direct observation of water clusters for surface design
Water cluster Vapor condensation Attenuated total reflection IR Surface structure
2023/3/1
Engineered surfaces for water collection have been intensively investigated. However, microscopic mechanism of condensation on structural surfaces is rarely explored and it's always a challenge to obs...
遵义师范学院化学化工学院专业介绍：化学工程与工艺
遵义师范学院 化学化工学院
2024/8/15
化学工程与工艺专业是2018年国家教育部批准的本科专业，隶属于遵义师范学化学化工学院，2018年9月首次招生。现有4个教学班，2019级学生37人，2020级学生38人，2021级学生42人，2022级学生50人；2019-2022级共有全日制在校本科生167人。化学化工学院切实抓好就业指导，促使学生就业能力不断提高。2022年，本专业首届毕业学生35人，8人考上硕士研究生，升学率22.9%，就业...
以浙江蜡梅叶片为材料,采用水蒸气蒸馏法对其挥发油提取工艺进行优化,并采用气相色谱-质谱联用法分析其成分。结果表明,浙江蜡梅的最优提取条件为浸泡时间120min,蒸馏时间240min,NaCl浓度0.5%,料液比1︰5,在此条件下其挥发油得率为1.483%;各因素对其得率的影响大小顺序为蒸馏时间>氯化钠浓度=料液比>浸泡时间。成分分析结果表明,浙江蜡梅叶片挥发油主成分为桉叶油醇(19.26%)、樟脑...
钌基催化剂催化苯部分加氢制环己烯的研究进展
钌催化剂 苯 部分加氢 环己烯
2019/12/11
环己烯具有活泼的双键,被广泛用于医药、农药、食品及其他高附加值精细化学品的生产中。工业上生产环己烯的方法主要有环己烷脱氢、环己醇脱水、卤代环己烷脱卤化氢、Birch还原和苯部分加氢等。相比于其他方法,苯部分加氢制环己烯工艺由于具有安全可靠、原子经济性强、环境友好等优点,引起了研究者的广泛关注。从热力学角度看,苯加氢生成环己烯的标准Gibbs自由能比生成环己烷的标准Gibbs自由能低75 kJ/mo...
采用苯乙烯(St)-丙烯酸甲酯(MA)无规共聚物(PSMA)(nSt∶nMA=75∶25)为增容剂,通过双螺杆挤出机将聚乳酸(PLA)与苯乙烯-丁二烯-苯乙烯(SBS)三嵌段共聚物熔融共混,研究了PSMA的含量对PLA/SBS共混物(mPLA∶mSBS=90∶10)相容性的影响。利用扫描电子显微镜、万能拉伸试验机、差示扫描量热仪和旋转流变仪对共混物的微观形貌、力学性能、热性能和流变性能进行表征。S...
模拟人体皮肤湿度响应特征和力学性质的皮肤模型
皮肤模型 弹性模量 吸水溶胀率 水合度
2019/11/6
优质的仿生皮肤模型(ASM)对皮肤接触材料的研究与开发至关重要,因此ASM的研究也备受重视。为了模拟人体皮肤的湿度响应特性和力学特性,将壳聚糖(CTS)水凝胶与聚二甲基硅氧烷(PDMS)复合构建了皮肤模型,并探索了二者的质量比以及固化剂的用量对ASM性能的影响。研究发现,随着固化剂用量的减少,ASM的水合度及吸水溶胀率均提高;当固化剂与PDMS的质量比小于1∶20时,ASM能够模拟人体皮肤水合度状...
目的 利用原子转移自由基聚合（ATRP）技术制备姜黄素分子印迹复合膜（MIM），并建立一种实际样品中姜黄素分离富集的方法。方法 以姜黄素为模板分子，甲基丙烯酸为功能单体，氯化亚铜为催化剂，五甲基二乙烯三胺为配体，聚偏氟乙烯微孔滤膜为基膜，采用热聚合法制备姜黄素MIM；通过扫描电镜（SEM）考察了MIM的微观结构；采用静态和动态吸附实验对MIM的最大吸附量和吸附平衡时间进行考察，并对选择性渗透能力进...
料在摊铺后形成的颗粒定向排列将导致其力学性质的固有各向异性. 依据粒料的实际不规则形状, 构建了可模拟粒间咬合嵌挤作用的三维离散元复杂形状颗粒; 生成了5 种不同沉积方向的各向异性试件和1种各向同性试件, 对比了各试件在三轴压缩试验中的宏观力学特性差异; 引入组构张量以量化各向异性程度, 利用玫瑰图表达接触法向与接触力的分布特征, 探究了粒料各向异性的细观发展规律. 结果表明: 颗粒长轴愈趋向水平...