合成润滑油的基础油聚醚油的物性及实用性研究

本文综述了聚醚油的主要物性，评价了聚醚油的水溶性、低温特性、热稳定性、摩擦、磨损特性。由聚醚油制成的润滑油有良好的润滑和抗剪切性，在高温状态下不结焦、不沉淀。在高温齿轮传动、压缩机、内燃机和冷冻机润滑中特别有效。     

合成润滑油的基础聚醚油的物性及实用性研究

本文综述了聚醚油的主要物性，评价了聚醚油的水溶性，低温特性，热稳定性，摩擦，磨损特性，由聚醚油制成的润滑油有良好的润滑和抗剪切怀，在高温状态下不结焦，不沉淀，在高温齿轮传动，压缩机，内燃机和冷冻机润滑中的特别有效。     

不对称转换方法制备D-型氨基酸

简述了D－型氨基酸的方法，化学不对称转换，生物不对称转换方法，制备D－型氨基酸的一般方法是先制备外消旋体，再进行拆分。根据拆分的手段和途径不同，分为物理拆分，化学拆分，生物拆分等。化学不对称转化是以L－型氨基酸或DL－型氨基酸为原料在拆分剂和催化剂共同存在下加热得到D－型氨基酸与拆分剂形成的盐，后者与碱反应得到D－型氨基酸。生物不对称转换包括两种情况，（1）不对称降解，即首先把DL－氨基酸衍生化。然后利用微生物产生的酶使氨基酸衍生物不对称水解。（2）水制备某一外消旋中间体，然后通过微生物体产生的消旋酶和水解酶在一定条件下使外消旋中间体转变为D－型氨基酸。     

聚醚型聚氨酯混炼胶性能研究

研究了炭黑补强剂和过氧化物（DCP,BIPB）对混炼型聚醚聚氨酯橡胶力学性能的影响,讨论了DCP和补强剂用量变化以及热空气老化对性能的影响。结果表明,DCP硫化胶拉断伸长率高,BIPB硫化胶永久变形低;当DCP用量为1.6份时,拉伸强度和撕裂强度最高,分别为25.3MPa和47.5kN/m;随补强剂用量的增加,混炼橡胶硬度增加,拉伸强度变化不明显,拉伸永久变形变大。     

聚醚型与聚酯型聚氨酯弹性体的性能研究

使用聚乙二醇(PEG)、聚四亚甲基醚二醇(PTMG)、聚己内酯(PCL)和4,4’-二苯基甲烷二异氰酸酯(MDI)合成了聚醚多元醇型和聚酯多元醇型热塑性聚氨酯弹性体(TPU)。研究了各种TPU中异氰酸酯指数(R0)、硬段浓度(Ch)、聚醚和聚酯的种类、摩尔质量及原料用量等对弹性体力学性能的影响;并且使用双酚A型环氧树脂NPEL-127改性了弹性体的耐热性。研究结果表明:TPU的硬度随着R0和Ch的增加而增加;聚醚型TPU中,随着软段中柔性链的增加,TPU的硬度下降而力学性能提高;聚酯型TPU中,随着聚酯和聚酯二元醇摩尔质量的提高,TPU的硬度和力学性能均有提高;聚酯型TPU的力学性能优于聚醚型TPU;环氧树脂改性使得聚醚型TPU耐热性提高。     

聚醚型氨基硅油改性水性聚氨酯的制备与性能研究

采用异佛尔酮二异氰酸酯、聚四氢呋喃醚二醇、二羟甲基丙酸、聚醚型氨基硅油等为主要原料制备了硅改性水性聚氨酯（PUDS）乳液及其涂膜。通过红外光谱、透射电镜等对PUDS乳液及其涂膜进行结构表征,并进行力学性能测试。结果表明,有机硅有效接入到水性聚氨酯分子链上,乳液稳定性良好,涂膜的耐水性明显提高;随着聚醚型氨基硅油用量的增加,涂膜拉伸性能有微下降趋势,当聚醚型氨基硅油在预聚体中的质量分数为2%和3%时,涂膜耐水性最好,伸长率下降最少,且涂膜手感柔顺性、滑爽性改善明显,综合性能优良。     

不对称转换法制备D-型氨基酸的研究进展

D-型氨基酸对生命科学的研究具有重大意义。不对称转换是光学活性化合物制备中越来越重要的一个分支。通过几种典型D-型氨基酸的制备工艺，概述了不对称转换的最新研究和应用进展，讨论了反应过程并对其大规模工业应用的前景进行了展望。     

聚醚型硅油改性水性聚氨酯的制备与性能研究

以异佛尔酮二异氰酸酯、聚四氢呋喃醚二醇、二羟甲基丙酸、聚醚型硅油等为原料制备了硅改性水性聚氨酯(PUDS)。采用红外光谱、透射电镜等对PUDS乳液及其涂膜进行了结构表征和性能测试,结果表明:有机硅有效地接枝在水性聚氨酯分子链上,涂膜耐水性显著提高,乳液稳定性良好,随着聚醚型硅油用量的增加,涂膜拉伸性能呈微弱下降趋势,当硅油用量为2%时,拉伸强度为16.7 MPa,断裂伸长率为753.7%,断裂强度15.8 MPa,综合性能优良。     

具有不对称结构的含磷杀虫剂进展

结合作者在该领域的研究进展，对近５０年来不对称有机磷杀虫剂的发展情况进行了综述。     

Crystallization of model fat blends containing symmetric and asymmetric monounsaturated triacylglycerols

In this study, the crystallization and melting properties of four different fat blends with the same saturated fat content (30%) but with different ratios of symmetric and asymmetric monounsaturated triacylglycerols were investigated using pNMR, DSC and polarized light microscopy. Blends were either palmitic (P) or stearic (S) based, and were combinations of SatOSat‐rich (Sat = saturated, O = oleic) and SatSatO‐rich vegetable oils with high‐oleic sunflower oil. The DSC results demonstrate that there was almost no difference in crystallization mechanism and crystallization rate between the two P‐based blends. Both blends showed a two‐step crystallization, which can be explained by polymorphism. Stop‐and‐return DSC results suggested an initial crystallization into an unstable polymorph followed by polymorphic transition during the crystallization. For the S‐based blends there was a clear difference between the SOS‐rich and the SSO‐rich blend, with a slower crystallization for the SSO‐rich blend. Possibly, this can be explained by fractional crystallization. The microstructure did not differ greatly between the blends. Directly after crystallization, the crystals of the SSO‐rich blend were slightly larger than the crystals of the SOS‐rich blend.     

离心式氯气压缩机油站仪表的选型及DCS参数设置

简介了离心式氯气压缩机的油站,结合实际工作经验介绍了油站仪表的选型,以及相应的DCS报警、联锁设置.     

Dependence of mechanical and tribological performance on the microstructure of (CrAlTiNbV)Nx high-entropy nitride coatings in aviation lubricant

The (CrAlTiNbV)N_x coatings are fabricated by controlling the substrate bias via magnetron sputtering method. Under low substrate bias, the coating tends to form a loose columnar crystal structure with (200) preferred orientation. However, when the substrate bias increases, the coating transforms into a dense nanocrystalline structure, and the (111) orientation is enhanced. As the substrate bias increases, the residual stress and hardness of the coating gradually increase, while the adhesion strength decreases slightly. Friction tests show that the coating possesses the lowest average friction coefficient (about 0.06) and wear rate (8.7 × 10^-9 mm³/N·m) in 4050# aviation lubricant, which is achieved under the substrate bias of -96 V and -126 V, respectively.     

Synthesis and characterization of segmented copolymers of aromatic polyether sulfone with liquid crystalline polyesters containing flexible spacers

The synthesis of segmented copolymers of aromatic polyether sulfone and liquid crystalline polyester containing flexible spacers is presented. The segmented copolymers were prepared by solution condensation of hydroxy-terminated polyether sulfone with diacid compounds 1–5 and 4,4′-dihydroxybiphenyl in a mixture of triphenylphosphine, pyridine and hexachloroethane. The obtained polymers show a glass transition at around 160 °C which belongs to the segmental motion of polyether sulfone blocks, and one or two melting transitions which belong to the thermal transitions of LCP blocks. Optical polarized microscopy verifies that the obtained segmented copolymers present a nematic liquid crystalline phase at a temperature higher than their melting transitions.     

PET装置润滑设备的维护及保养

介绍了PET装置使用的润滑剂的种类、主要理化指标选用原则,分析了润滑设备维护中常见的故障及处理方法。通过加强对润滑设备的维护及保养,延长了设备的使用寿命,保证了PET装置的长周期运行。     

Solid polymer electrolytes V: microstructure and ionic conductivity of epoxide-crosslinked polyether networks doped with LiClO4

A crosslinked polyether network was prepared from poly(ethylene glycol) diglycidyl ether (PEGDE) cured with poly(propylene oxide) polyamine. Significant interactions between ions and polymer host have been observed for the crosslinked polyether network in the presence of LiClO₄ by means of FT-IR, DSC, TGA, and ⁷Li MAS solid-state NMR. Thermal stability and ionic conductivity of these complexes were also investigated by TGA and AC impedance measurements. The results of FT-IR, DSC, TGA and ⁷Li MAS solid-state NMR measurements indicate the formation of different types of complexes through the interaction of ions with different coordination sites of polymer electrolyte networks. The dependence of ionic conductivity was investigated as a function of temperature, LiClO₄ concentration and the molecular weight of polyether curing agents. It is observed that the behavior of ion transport follows the empirical Vogel-Tamman-Fulcher (VTF) type relationship for all the samples, implying the diffusion of charge carrier is assisted by the segmental motions of polymer chains. Moreover, the conductivity is also correlated with the interactions between ions and polymer host, and the maximum ionic conductivity occurs at the LiClO₄ concentration of [O]/[Li⁺]=15.     

盘式过滤器工艺性能对比试验研究

设计了并联式的过滤系统,将国产、进口的盘式过滤器进行了工艺性能对比试验。针对不同过滤精度的盘片在不同的加药量下,对比研究了两种过滤器进出水的浊度和悬浮固体含量、周期产水量、FPI值、水头损失、流量、反洗等工艺性能参数的差异。试验结果表明:在相同试验条件下,两种过滤器的工艺性能和出水水质参数都相近。     

Synthesis and characterization of isocyanate-functionalized PVA-based polymers with applications as new additives in lubricant formulations

This work deals with the incorporation of reactive isocyanate groups into polymer additives, which could be potentially used to modify the rheological properties of lubricating greases by reinforcing the role of traditional thickening agents. Thus, a batch of partially protected poly(vinylalcohol) (PVA) copolymers was successfully synthesized. Some of their  OH groups were blocked as tetrahydropyranyl (THP) ethers (PVA–THP), while the spare hydroxyl groups were further functionalized with  NCO pendant groups by reaction with 1,6-hexamethylene diisocyanate, leading to several isocyanate-functionalized PVA-based polymers (PVA–THP–NCO), which were tested as rheology modifiers of lithium lubricating greases. The highest protection degree of hydroxyl groups achieved as THP-ether was 58.5% and the recovered polymers were isolated with excellent yields (close to 90% in most cases). NCO-functionalized PVA-based polymers (PVA–THP–NCO) exerted a significant rheological modification in lithium 12-hydroxystearate lubricating greases, increasing the values of the linear viscoelastic functions. The influence of the degree of protection and later functionalization of PVA on the rheological properties of PVA–THP–NCO-additivated lubricating greases is discussed. © 2012 Wiley Periodicals, Inc. J Appl Polym Sci, 2012     

高分散稳定纳米金刚石润滑油的制备及其摩擦学性能

为了改善纳米金刚石颗粒(NDPs)在抗磨液压油(AHO)中的分散性,制备了酸氧化?高温热处理的NDPs (T-NDPs),将其与添加剂(油胺、聚异丁烯丁二酰亚胺T154和高碱值合成磺酸钙T106)混合后加入AHO中,制得含T-NDPs的AHO。用FESEM及Zeta电位仪、FT-IR和静态沉降法对其分散性进行表征,用四球摩擦磨损试验机、3D激光扫描显微镜和SEM/EDS对含T-NDPs的AHO的摩擦学性能和磨痕区域进行了分析。结果表明,酸氧化?高温热处理后,NDPs的平均粒径从270.2 nm降至153.5 nm,吸附添加剂后的T-NDPs的平均粒径为101.5 nm,添加剂可提高T-NDPs的油溶性并抑制其团聚,因而含T-NDPs的AHO具有良好的分散稳定性;T-NDPs含量为0.04wt%时,AHO的摩擦系数和磨斑直径比不加T-NDPs时分别降低13.2%和17.8%;T-NDPs作为润滑添加剂的减摩抗磨功效归因于其在摩擦界面起到支撑和滚动轴承的作用及在摩擦副表面参与润滑膜形成。     

Conferring polytetrafluoroethylene micropowders with hydrophilicity using dopamine chemistry and the application as water‐based lubricant additive

The hydrophilicity of polytetrafluoroethylene (PTFE) micropowders was easily achieved by modifying the surface with thin polydopamine(Pdop) layer deposited through spontaneous oxidative polymerization of dopamine. Compared with the pure PTFE, the Pdop modified PTFE(PTFE@Pdop) possesses excellent hydrophilic property such as low active ratio, and good dispersivity in water. The quantity of coating and the surface amphiphilic properties were readily controlled by adjusting the deposition time. The tribological properties of the as‐prepared PTFE@Pdop micropowders as additives in water were evaluated. The results confirmed that the PTFE@Pdop exhibited good antiwear and friction reduction properties even under low concentration in water. The simplicity of the method makes large‐scale production of hydrophilic PTFE possible and may be extended as a powerful route for modification of other organic solid lubricating materials that can be exploited as water‐based lubricant additives. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2011