Degradable Superhydrophilic Iron-Pillared Bentonite Doped with Polybutylene Adipate/Terephthalate Open-Cell Foam: Its Application in Dye Degradation,Removal of Heavy Metal Ions,and Oil–Water Separation

Development of industrialization has brought convenience to people's lives; however, it has also brought serious harm to the environment, where, water pollution is the most obvious. Here, a polybutylene adipate terephthalate (PBAT) open-cell foam doped with iron-pillared bentonite (IPB) is prepared by using sugar as a pore-forming agent and solution phase separation, and then combined with a solution dipping method to coat the foam surface with a polyacrylamide/SiO₂, which makes the PBAT foam superhydrophilic. The static adsorption effect of superhydrophilic IPB-doped PBAT open-cell foam on methylene blue (MB) and Cu²⁺ is studied. The adsorption isotherm fitting shows that the adsorption conforms to the Langmuir model and it has biased toward monolayer adsorption. The adsorption kinetics fitting confirms that the adsorption process is in line with the pseudo-second-order adsorption model, which is dominated by chemical adsorption. The modified PBAT open-cell foam has an adsorption effect on Cu²⁺; however, it has weak cyclic adsorption capacity. It shows a good cyclic adsorption ability for the cationic dye MB and it has >95% photodegradation efficiency of the MB after five time's cyclic adsorption. The superhydrophilicity makes the foam to have better applications in oil–water separation.     

水质稳定剂HPDP缓蚀阻垢性能评定

用静态阻垢，旋转挂片失得法实验研究了ＨＰＤＰ对ＣａＣＯ３，Ｃａ３（ＰＯ４）２等的阻垢性能以及对Ｑ２３５碳钢的缓蚀性能等。试验证明，ＨＰＤＰ是一种优良的阻垢缓蚀剂，适用于高温，高碱，高ＰＨ，高浓缩倍数的循环冷却水处理，具有广阔的应用前景。     

Stage-efficiency of centrifugal extractor used in nuclear industry

1　INTRODUCTIONComparedwithamixer settlerorpulsedcolumnusedinthenuclearfuelreprocessingextraction pro cesses,ashort residence timecentrifugalextractorcatchesresearcher seyesbecauseofthe goodphaseseparationandasmallhold upvolume .Itshowsthefollowingadvantagesinthenuclearindustry[1] :1)Reducingsolventdegradationduetoradiation ;2 )Reducinginventoryofaqueousandorganicphases ,whichgivesrapidstart upandshut down ;3)Com pactdesignthatcontributestothereductionofplantcost .Manydifferenttypesofcen…     

烧结工艺对β-氮化硅陶瓷的影响

以β-Si3N4粉末为原料,以YAG（钇铝石榴石）为烧结助剂,通过气氛压力烧结（GPS）制备出致密的β-氮化硅陶瓷材料,形成大小均匀的柱状颗粒和小球状颗粒复合显微结构,研究了烧结助剂质量分数、烧结温度以及保温时间对β-氮化硅陶瓷致密化程度及力学性能的影响.     

功能陶瓷现状与发展动向

本文重点论述了功能陶瓷材料，原料粉体、工艺与装备、元器件市场的现状及其发展趋势。指出了功能陶瓷在现代科技领域中具有重要意义及广阔的应用前景。     

Preparation and characterization of soluble polyimides

Two kinds of soluble polyimides from pyromellitic dianhydride with Congo red and 4-sulfanilamide were prepared, respectively. Their structures were characterized by IR and ¹H-NMR, and the thermal properties were investigated by DSC and TG–DTA. © 1995 John Wiley & Sons, Inc.     

应用漆雾凝聚剂的体会

漆雾除渣系统是涂装生产线必备的装置，本文简要介绍应用漆雾凝聚剂的体会。     

树脂传递模塑工艺中工艺参数对树脂-纤维界面的影响

本文系统研究了工艺参数对由树脂传递模塑成型的复合材料的拉伸强度和树脂-纤维界面的影响.这些参数包括注射压力和模腔/纤维毡的温度.在较低的注射压力和较高的成型温度下,纤维得到良好的浸润和粘结,成型复合材料的拉伸强度也较高.     

聚合硫酸铁处理制革废水

本文研究了几种常用的国产混凝剂处理制革废水的效果，得出聚合硫酸铁是一种比较经济有效的混凝剂，配合ＰＡＭ助凝剂可以取得更好的效果。工艺上采用混凝气浮，可全部去除硫化物，出水总铬≤１ｍｇ／Ｌ，ＣＯＤ去除率可达７０％－８０％。     

环戊烯催化氧化合成戊二醛及其动力学

对在非水溶剂存在下过氧化氢一步催化氧化环戊烯制备戊二醛过程中的催化体系进行了研究。考察了具有脱水功能的Ｂ２Ｏ３的作用及用量，确立了具有优良催化性能的催化体系ＷＯ３－Ｂ２Ｏ３；实验测定了反应动力学数据，采用非线性回归Ｐｏｗｅｌ共扼法求得了反应动力学方程。在推荐的催化剂体系和工艺条件下，环戊烯转化率６７％，戊二醛收率６３％，选择性９１％。