影响废碱液氧化效果的因素分析

采用空气缓慢氧化处理乙烯装置废碱液中的硫化钠 ,使之生成可溶性的硫酸盐 ,从而可排入污水处理系统处理。在压力 4 70kPa、温度 1 1 5℃、停留时间约 1 0h的条件下 ,氧化后废碱液中硫化钠的质量分数可降至 5 0× 1 0 - 4以下 ,混合器是决定氧化效果的重要因素。     

粘贴片材加固混凝土梁时的端部剥离应力分析

在弹性理论的基础上,推导了任意线性分布荷载作用下混凝土梁粘贴加强片材加固时,片材端部剥离应力的计算公式.计算结果和有限元方法基本吻合.分析表明,剥离应力不但和混凝土梁的参数有关,还和粘胶层以及加强材料有关.     

Enzymic peeling of Indian grapefruit (Citrus paradisi)

The tough nature of grapefruit (Citrus paradisi) peel and its close adherence to the inner fruit sections limit the industrial processing of grapefruit. Two commercial peeling enzymes coded as ‘Brand A’ and ‘Brand B’ were studied for enzymic peeling of Indian grapefruit by vacuum infusion. The peeling process was optimised with respect to process parameters such as scalding time, enzyme concentration, vacuum infusion time and incubation time. © 2001 Society of Chemical Industry     

CR/CPVC/MMA三元接枝共聚物

研究了高氯含量的氯化聚氯乙烯（CPVC）对氯丁橡胶／甲基丙烯酸甲酯接枝共聚合的影响,用红外光谱法和差热分析法对改性粘合剂进行了表征,结果表明,使用CPVC不仅明显提高粘合剂PVC材料的粘接强,而且还降低了成本。     

微波辅助碱液提取花生壳黄酮工艺

采用微波辅助碱液提取花生（Arachis hypogaea L.）壳黄酮,通过酸沉技术得到黄酮粗品。以黄酮提取得率作评价指标,利用单因素实验探索各因素对黄酮提取得率的影响,继以正交实验优化工艺参数。得到最适工艺条件：提取溶剂pH12.0、液料比30∶1 mL/g、提取温度80℃、酸沉pH4.0和提取时间17 min。在优化后的工艺中,黄酮提取得率达（1.113±0.010）%,纯度为（16.90±0.13）%。该工艺操作简单、便捷,可用于花生壳黄酮的提取。     

Modelling design of cuts for enzymatic peeling of mandarin and optimization of different parameters of the process

 A process for enzymatic peeling of mandarin was optimised. Enzymatic peeling was completed by means of infusion under vacuum of a commercial preparation of pectolases and cellulases (Rohament PC), followed by a period of incubation with the prepared enzymatic solution, elimination of the skin and separation of the segments. Distinct designs of the cuts of the flavedo were studied, by analysing characteristics of enzymatic saturation at distinct pressures and times of vacuum. Based on the data obtained, a mathematical model was developed which allowed us to predict the infusion of enzyme reached as a function of pressure and time of vacuum. The best peeling results were achieved in those combinations of pressure and time of vacuum that allowed a saturation of approximately 90% in less than 10 min. The design of an ideal cut (a cut in the equatorial zone, the removal of part of the peel of the calycinal and peduncular zones and two longitudinal cuts), two suitable vacuum conditions (defined using the mathematical model; 400 mm Hg and 500 mm Hg during 5 min), the effect of distinct concentrations of Rohament PC and incubation times on the main attributes of peeling quality (ease of separation of the remains of the residual peel, ease of segment separation, percentage of viable segments and percentage of albedo not attacked by the enzyme) were studied. The greatest quantity of viable segments and the best quality of enzymatic peeling were achieved by using an enzymatic concentration of 5 g/l of Rohament PC and an incubation time of 20 min. Under these conditions, 90% and 85% of viable segments were obtained, less than 10% of the albedo was not attacked, an easy separation of the remains of the residual peel and easy separation of the segments were achieved. Received: 30 January 1998 / Revised version: 7 April 1998     

Elastomer-Elastomer Interfaces: Mechanisms of Autohesion

Elastomer-elastomer joints are a special case of polymer bonding. Interfacial adsorption, molecular interdiffusion, and entanglements, as well as chemical bonding, are the different mechanisms which intervene in adhesion phenomena. Their relative contribution is not well known and depends on many parameters. If the formation of a thick, interdiffused interface may be important in order to get a strong interface, covalent bonding is often necessary and can occur even though no interdiffusion takes place. In this paper, we are interested in the autohesion mechanism of two elastomers (PI and SBR) for which the mobility and the reactivity have been reduced before assembly. The peel test in air and liquid medium helped us to understand the role of the different contributions.     

亚麻织物丝光过程中碱液浓度的影响分析

亚麻织物经丝光后形态随丝光浓度及时间的变化而变化，纤维的纵面变得圆润，横节消失或不是很明显，纤维剧烈溶胀，横截面由原来的有棱角的多边形转变成外缘光滑的圆形或椭圆形，纤维断裂强力也有了很大的提高。通过测试亚麻织物经丝光后吸附能力及上染速率的变化情况，以此来分析亚麻织物丝光过程中碱液浓度对其的影响。     

优钢冷轧起皮机理研究

针对优钢冷轧后表面起皮现象，通过对起皮样品的检测分析，发现起皮处有大量铁和还原铁，这是造成冷轧起皮的直接起因；通过一系列试验，确认了铸坯在加热炉内因相变形成了微裂纹，这是造成冷轧起皮的根本原因。基于现场工况条件与设备实际情况，优化了生产组织模式，根据钢种和用途优化了中包温度、连铸拉速和铸坯入炉温度，有效杜绝了铸坯微裂纹的出现，遏制了铸坯内部氧化，优钢冷轧表面起皮得到显著改善。     

T91钢高温空气氧化动力学及层脱落机理

通过扫描电镜对T91钢高温空气氧化层的形貌进行观察,利用X-Ray物相分析仪测试了氧化层的物相结构,利用热天平连续称重法对T91钢高温空气氧化速率进行测定,并分析了氧化层的脱落机理.结果表明:T91钢高温空气氧化的动力学曲线符合对数规律,氧化速率低于1级完全抗氧化性的标准;氧化层脱落的机理是界面裂纹和氧化层弓出弯曲破裂和剥落,也可以是氧化层内纵向裂纹的不穿透破裂剥落.