可动凝胶深部调驱候选井筛选方法研究

根据可动凝胶深部调驱机理,结合注水井和对应油井的静、动态特征,筛选出了用于确定最佳调驱井的指标体系,并采用变权的模糊综合评判方法进行多因素定量评价。结果表明,用渗透率非均质性、吸水剖面非均质性、吸水强度、井口压降曲线、含水-采出程度对应关系、油水井连通程度、油层未动用程度及沉积相特征等指标来筛选调驱注入井可提高选井的可靠性,保证可动凝胶深部调驱的效果。     

凝胶过滤色谱测定高分子量聚乙烯醇分子量和分子量分布

用凝胶过滤色谱对高分子量聚乙烯醇分子量、分子量分布进行剖析。采用Plaquagel-OH色谱柱,0.25mol/LNaNO3,0.01mol/L Na2HPO4-NaH2PO,pH=7的缓冲溶液流动相,流速1ml/min,示差折光检测器,柱温30℃,聚环氧乙烷作标准物。该方法能显著缩短分析时间,提高准确性,可用于对高聚合度聚乙烯醇进行研究和指导生产。     

Inside Front Cover: Three‐Dimensionally Ordered Gold Nanocrystal/Silica Superlattice Thin Films Synthesized via Sol–Gel Self‐Assembly (Adv. Funct. Mater. 7/2006)

The synthesis of three‐dimensionally ordered, transparent gold‐nanocrystal (NC)/silica superlattice thin films using the self‐assembly (by spin‐coating) of water‐soluble gold nanocrystal micelles and soluble silica is reported by Fan and co‐workers on p. 891. The robust, 3D NC/silica superlattice films are of interest for the development of collective optical and electronic phenomena, and, importantly, for the integration of NC arrays into device architectures. Nanocrystals and their ordered arrays hold many important applications in fields such as catalysis, surface‐enhanced Raman spectroscopy based sensors, memory storage, and electronic and optical nanodevices. Herein, a simple and general method to synthesize ordered, three‐dimensional, transparent gold nanocrystal/silica superlattice thin films by self‐assembly of gold nanocrystal micelles with silica or organosilsesquioxane by spin‐coating is reported. The self‐assembly process is conducted under acidic sol–gel conditions (ca. pH 2), ensuring spin‐solution homogeneity and stability and facilitating the formation of ordered and transparent gold nanocrystal/silica films. The monodisperse nanocrystals are organized within inorganic host matrices as a face‐centered cubic mesostructure, and characterized by transmission electron spectroscopy and X‐ray diffraction.     

Effects and properties of poly(arylene ether benzonitrile)s of various molecular weights blended with sulfonated poly(ether ether ketone)

Poly(arylene ether benzonitrile) (PAEBN) was synthesized with 2,6‐dichlorobenzonitrile and biphenol. PAEBNs with various molecular weights (MWs), 1,640,000 and 185,000 g/mol, were synthesized by control of the stoichiometry of the monomers and were blended with sulfonated poly(ether ether ketone) (SPEEK). The effects of MW on the water uptake, swelling, methanol permeability, and proton conductivity of the SPEEK/PAEBN blend membranes were investigated. The molecular mobility of the SPEEK/PAEBN blends was also examined in this study. © 2007 Wiley Periodicals, Inc. J Appl Polym Sci, 2008     

利用废硅胶生产五水偏硅酸钠的研究

概述了五水偏硅酸钠的市场现状,介绍了以废硅胶为原料生产五水偏硅酸钠的实验方法。通过实验,得出了优化实验条件为:模数采用0.5~0.8,波美度在35~50°,加热废硅胶及浓缩结晶的温度为90~100℃,时间为持续沸腾5min以上,采用自然降温法,时间在10h左右。最终制得良好的晶体,其中氧化钠含量为28.5%,氧化硅含量27.3%,产品质量达到国内同类产品的一级品标准。     

Effects of processing conditions on the curing of a vinyl ester resin

The effects of temperature, initiator, and accelerator levels on the curing of an epoxy bisphenol‐A vinyl ester resin Derakane® 411‐45 (formulated with styrene) were investigated by gel‐time and exotherm‐peak measurements on bulk samples. It was observed that the gel time was reduced as the initiator or accelerator ratio increased. Except at higher contents of the accelerator, a small kinetic plateau was seen in the gel curve and a shift of the maximum exotherm toward high temperatures in the DSC curves. This was explained by the dual role played by the accelerator species. A regression analysis of all gel‐time data showed a dependence of 3/2 order in the accelerator and first order in the initiator concentrations. Thus, for this polymerization initiation system, the gel time can be predicted for any initiator and cobalt levels and at any temperature within the ranges studied. The effect of the initiator on the unreacted styrene and vinyl ester was also examined. © 2002 Wiley Periodicals, Inc. J Appl Polym Sci 84: 1146–1154, 2002; DOI 10.1002/app.10403     

埕岛油田馆陶组油藏调剖技术初探

讨论了埕岛油田注水井调剖中施工场地、调剖剂配制水选择以及井下防砂管等因素对调剖施工方式的影响。分析了多种类型调剖剂的适应性,筛选出冻胶类调剖剂作为埕岛油田的调剖剂。研制出由改性HPAM为主剂、Cr3 有机络合物为交联剂和以金属络合物为主的交联稳定剂组成的HST-1型海水基冻胶调剖剂,并用于CB251A-6井调剖,取得了良好效果。探索出了一套适用于埕岛油田不动管柱、海水配制调剖剂和采用船载施工设备进行现场施工的注水井调剖工艺。     

溶胶－凝胶二氧化硅驻极体薄膜的物理化学改性

实验研究了由溶胶－凝胶法制备二氧化硅驻极体薄膜的工艺。用红外透射谱、扫描电子显微镜以及驻极体等温表面电位测量和热刺激放电等实验考察了热处理和化学表面修正两个关键工艺对溶胶－凝胶二氧化硅样品驻极体性能的影响。结果表明经过高温条件下一定时间的热处理和化学表面修正，可以制备出性能优良的驻极体薄膜     

Ultrasonic study of molecular association of poly(vinyl chloride) solution in tetrahydrofuran

Ultrasonic absorption, velocity, adiabatic compressibility, relaxation time and relaxation amplitude measurements are reported on poly(vinyl chloride) (PVC) solution in tetrahydrofuran (THF) using pulsed ultrasonic apparatus operating at 2 MHz and 313 K. Results show a linear increase of velocity. density, viscosity, absorption coefficient, relaxation time and relaxation amplitude values with the increase of PVC concentration in THF. In contrast the compressibility decreases with increasing PVC concentration. This suggests interaction between PVC and THF molecules.     

溶胶-凝胶法制备(Sr,Pb)TiO3纳米晶粉及表征

采用溶胶－凝胶法成功地合成了（Sr,Pb)TiO3纳米晶粉，并利用FTIR技术对凝胶的形成过程及350℃，1．5h煅烧获得的粉体材料进行了表征。实验以TG－DSC分析作为拟定煅烧温度的依据，以XRD作为煅烧产物的分析手段，最佳煅烧温度为600℃，所合成的（Sr,Pb)TiO3纳米晶粉的平均晶粒尺寸约为21nm，属钙钛矿型立方顺电相结构。