β-环糊精修饰Ni/SFCC强化C9石油树脂催化加氢性能

以废弃的流化催化裂化催化剂（简称SFCC）为载体、β-环糊精为金属络合剂、硝酸镍为镍源，采用湿法浸渍法制备β-环糊精修饰的Ni/SFCC催化剂（简称Ni/SFCC-CD催化剂），考察其对C9石油树脂的催化加氢性能。通过BET比表面积测试、H2程序升温还原、X射线光电子能谱等手段对催化剂的物相结构进行表征，研究β-环糊精的作用机理及其对催化剂加氢性能的影响。研究结果表明：在反应温度为260 ℃、反应压力为7 MPa、反应时间为2.0 h的最优条件下，采用Ni/SFCC-CD催化C9石油树脂加氢，可制得溴值为1.45 gBr/（100 g）、色号（加纳德）小于1的水白色氢化C9石油树脂，催化剂循环使用4次后仍保持良好活性；β-环糊精的作用机理是：β-环糊精与硝酸镍产生络合作用，抑制硝酸镍的分解、控制NiO的结晶过程和增强活性组分Ni与载体之间的相互作用力，从而提高了Ni/SFCC-CD的催化活性和稳定性。     

HT-7U纵场磁体的真空压力浸渍

主要通过模拟匝间流动试验、短样试验和长样试验等 ,探求低温超导托卡马克HT 7U中纵场磁体线圈的绝缘层真空压力浸渍的工艺参数 ,确定工艺流程 ,并以模型线圈试验的电性能和液氦温度下的力学性能来验证工艺参数及工艺流程的可靠性。     

VPI粉云母带的选型试验研究

为电机主绝缘VPI工艺选择合适的粉云母带，对几种真空压力浸渍(VPI)用云母带进行了试验研究，分析了选型原则，同时对比了几种粉云母带的性能。将它们应用于模拟线棒中，线棒的试验数据表明：选出的两种云母带的配合可获得优异的性能，达到优等品标准水平。再将少胶云母带应用于电机整机试验，试验结果表明达到了减薄绝缘、降低温升、延缓绝缘老化、提高电机使用寿命的目的。     

MODELING WATER LOSS DURING FRYING OF POTATO STRIPS: EFFECT OF SOLUTE IMPREGNATION

The effect of solute impregnation on water loss and oil uptake during potato strip frying was studied. Blanched potato strips were impregnated at 25°C by soaking in a solution of sucrose-NaCl-water, 20-5-75% by weight. After rinsing and air drying, strips were deep fried in sunflower oil at 160, 170 and 180°C. A control treatment, consisting of potato strips blanched but not soaked and later air dried was also conducted. Solute impregnation provided a decrease of the oil uptake. Two models, based on Fick's law were used to describe water loss during frying. The first one is the classic model with an effective moisture diffusion coefficient assumed a constant value. The second model considers that diffusion coefficient varies during the frying process. For a given frying temperature, constant diffusion coefficient for control potatoes resulted in lower values than the impregnated ones. The variable diffusivity model showed a two-stage behavior: during the first stage of frying, diffusion coefficient increased with frying temperatures, but from a given time on an inverse behavior began. This last fact was found to be related to an increase of the measured peak force needed to penetrate the potato crust.     

石墨电极高温抗氧化技术研究现状

概述石墨电极抗氧化技术的研究现状，重点介绍选择抗氧化涂层体系的要求及涂层制备方法，包括包埋浸渗法、化学气相沉积法、等离子喷涂法及溶胶--凝胶法．展望了石墨电极材料高温抗氧化涂层研究的方向．     

Impacts of varnishes and impregnation chemicals on combustion properties of oak (Quercus petreae lipsky)

This study was performed to determine the effects of varnishing after impregnation with boron compounds on combustion properties of oak. For this aim, the test samples prepared from oak (Quercus petreae Liebl.) wood were impregnated according to ASTM D 1413‐99 with boric acid (Ba) and borax (Bx) by vacuum technique. After impregnation, surfaces were coated by cellulosic (Cv), synthetic (Sn), polyurethane (Pu), waterborne (Wb), acrylic (Ac), and acid hardening (Ah) varnishes in accordance to ASTM D 3023. Combustion properties of samples after varnishing process were determined, according to ASTM E 160‐50. According to material and process types, combustion temperature was the highest in Bx and Cv, the lowest in Ba and Ac. An important difference was not observed between without flame source combustion (WFSC) and flame source combustion (FSC). According to combustion type, impregnation material and varnish type, combustion temperature was the highest value in WFSC + Bx + acid hardening varnish combination and the lowest in WFSC + Ba + acrylic varnish combination. As a result, the tested varnishes showed an increasing impact but boron compounds showed a decreasing impact on combustion properties of oak. In consequence, for usage areas having a high risk of fire, impregnation of wood material with boron compounds before varnishing will decrease combustion temperature and provide security. © 2007 Wiley Periodicals, Inc. J Appl Polym Sci 2008     

一种加装补偿散热装置的大容量电力电容器设计

目前,容量小的高电压电力电容器,由于发热量比较小,依靠本身外壳表面散热,足以使电容器温升控制在允许的范围内;同时依靠外壳的膨胀和缩小足以补偿因温度升高和降低变化引起外壳内体积增大和缩小。对于大容量的电容器,由于发热量大,单靠外壳的表面积散热不足以把电容器的温升控制在允许的范围内,需加装散热器;同时由于容量大,体积大,外壳需采用较厚的钢板才能满足强度要求。但采用厚钢板做外壳,又不容易形变,难以补偿电容器内部液体体积随温度变化,需加装扩张器或储油柜,不论是加装散热器、储油柜还是扩张器,这些散热器或补偿装置由于焊点多制造工艺复杂,可靠性不高。为了解决大容量电容器上述缺点,本文提出了一种新型补偿散热装置,该装置既具有散热器的功能,又具有储油柜或扩张器的功能,可以代替散热器、储油柜或扩张器。     

热固型甲基丙烯酸酯真空浸渗剂发展概况

本文简述了真空浸渗剂的发展概况，着重介绍了其中的热固化浸渗剂及其组成和浸渗工艺。     

钛掺杂硅胶块体吸附剂

以陶瓷纤维纸片为基材,顺次经水玻璃、酸性钛盐溶液浸渍共沉淀制得新型陶瓷基钛掺杂硅胶块体吸附剂.多孔介质表面分析显示:掺杂硅胶孔径在0.5～6 nm范围,以中孔为主.Fourier变换红外谱在波数954 cm 1处的特征吸收峰表明吸附剂中形成了Si-O-Ti键.根据掺杂前后固体魔角核磁共振硅谱中硅原子化学位移的变化(向高场方向移动)及X射线光电子能谱中各原子结合能的变化(Ti2p3/2的结合能随钛含量的增加而增加,而Si2p,O1s的结合能则呈相反趋势)进一步表明:钛原子替代硅原子进入硅胶网络.热重分析及烧结实验结果显示:钛掺杂吸附剂具有更好的热稳定性.新型吸附剂优异的吸附性能除了与其高的比表面积相关外,还与Ti-O键对水分子的亲合力紧密相关,其耐热性能增强与形成高热稳定性Ti-O Si键及材料表面导热性能提高有关.