锌系磷化液的防腐应用

介绍了金属的防腐处理———磷化工艺的几个步骤及影响磷化处理的因素 ,并指出了存在问题及解决方法。     

低冲击条件下凝聚炸药延迟起爆现象的研究进展

描述了凝聚炸药在低强度冲击作用下的延迟现象XTD介绍并分析研究XDT现象的试验和数值模拟方法，提出了XDT研究的发展方向。     

光活性二氧化钛涂层的研究与制备

本文介绍了制备光活性TiO2涂层的两种主要方法，并就一些影响因素进行了简单的讨论。     

正铌酸镧陶瓷的形状记忆效应及其畴结构

采用热压烧结工艺制备了多晶正铌酸镧(LaNbO4)陶瓷。对LaNbO4陶瓷的形状记忆效应进行了测量，结果表明：在室温加压变形的试样，在加温到单斜至四方相相变温度以上再冷却后，其形状将回复到其原始状态。透射电镜分析显示，在多晶LaNbO4陶瓷晶粒内大量存在均匀平行捧列的畴结构，畴宽50nm左右。通过选区电子衍射分析鉴定了畴结构和畴间位向关系。X射线衍射分析发现，通过表面打磨施加切应力能使LaNbO4陶瓷发生显著的畴切换。对有关机理进行了讨论。提出陶瓷多晶体中晶界与畴界之间的交互作用导致了其形状记忆效应。     

破乳+Fenton试剂法处理高浓度废乳化液的研究

采用破乳-Fenton试剂法对机械厂磨床车间废乳化液进行处理(原水CODcr=290000mg／L，BOD5=28000mg／L)。结果表明：使用合适的破乳药剂，破乳后废水的CODcr去除率达到97．8％；之后投加适量的Fenton试剂进行氧化处理，最终出水CODcr为684mg／L；BOD5／COD由0．094增至0．47，可生化性大大提高。     

Oxidation behavior of fine-grained SiC-B4C/C composites up to 1400 °C

Fine-grained B₄C-SiC/C composites were fabricated using a ball-milling dispersion process. The oxidation behaviors of both fine-grained B₄C-SiC/C composites and coarse-grained B₄C-SiC/C composites at temperatures of up to 1400 °C were analyzed by the differential thermal analysis technique, and the surface morphology of the composites after isothermal oxidation at 800, 1200 and 1400 °C was examined by scanning electron microscopy (SEM). The results indicated that fine-grained B₄C-SiC/C composites had excellent oxidation resistance with self-healing properties at 1400 °C. A general model and mechanism for self-protection against oxidation of carbon materials were proposed.     

分子筛催化剂的积炭失活原因探讨

讨论了影响分子筛催化剂积炭失活的主要因素：分子筛孔结构,温度,空速,分子筛酸度,分子筛颗粒尺寸,扩散等,以及分子筛积炭的失活机理。有机物种在分子筛催化剂上的积炭过程是一个十分复杂的催化反应过程。对于不同的反应,其积炭失活的机理是不同的。     

Large increase of Curie temperature in (110)-oriented La0.7Sr0.3MnO3 films

From the perspectives of scientific researches and practical applications, it is desirable to explore high operating temperature ferromagnetic films. The effect of biaxial strain on magnetic properties of (110)-oriented La_0.7Sr_0.3MnO₃ films was studied. High quality La_0.7Sr_0.3MnO₃ films were grown on (110)-oriented perovskite single crystal substrates using pulsed laser deposition, varying substrate-induced misfit strains from ??2.27–0.75%. A remarkable enhancement of Curie temperature has been achieved for (110)-oriented La_0.7Sr_0.3MnO₃ films clamped with small misfit strains (i.e., grown on LAST (110)). The enhanced Curie temperature of (110)-oriented La_0.7Sr_0.3MnO₃ films could be attributed to the misfit strain between the films and the underlying substrates and may have technological implication for applications at high temperature environments.     

Microcellular foaming of chlorosulfonated polyethylene rubber and its kaolin‐filled compounds with supercritical nitrogen

The microcellular foaming of vulcanizates made from chlorosulfonated polyethylene (CSM) rubber and its kaolin‐filled compounds was carried out with supercritical nitrogen. The effects of various curing times, temperatures of the vulcanizates, and kaolin filler contents in the vulcanizates on the prepared foams were studied. The foaming of the vulcanizates with various crosslinking densities revealed the critical effect the crosslinking density of the CSM matrix played on its foaming. A certain sufficient level of crosslinking density was most effective for the foaming of the matrix; a higher crosslinking density led to a decreased cell size, increased cell density, and decreased matrix expansion in the foams. The effect of the crosslinking density was due to its effect on the free volume of the elastomeric matrix, which controlled the gas diffusion from the matrix during the pressure‐release stage of the foaming operation. The incorporation of kaolin decreased the cell size and increased the cell density of the foams; the decreased free volume and the heterogeneous cell nucleation effect of the kaolin contributed to this. The tensile strength of the foams significantly improved with increasing kaolin content in the foams. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018 , 135, 45656.     

Comparison of the bligh and dyer and folch methods for total lipid determination in a broad range of marine tissue

For many studies, it is important to measure the total lipid content of biological samples accurately. The Bligh and Dyer method of extraction was developed as a rapid but effective method for determining total lipid content in fish muscle. However, it is also widely used in studies measuring total lipid content of whole fish and other tissues. Although some investigators may have used modified Bligh and Dyer procedures, rarely have modifications been specified nor has their effectiveness been quantitatively evaluated. Thus, we compared this method with that of the classic Folch extraction in determining total lipid content of fish samples ranging from 0.5 to 26.6% lipid. We performed both methods as originally specified, i.e., using the chloroform/methanol/water ratios of 1:2:0.8 and 2:2:1.8 (before and after dilution, respectively) for Bligh and Dyer and of 8:4:3 for Folch, and with the initial solvent/sample ratios of (3+1):1 (Bligh and Dyer) and 20:1 (Folch). We also compared these with several other solvent/sample ratios. In samples containing <2% lipid, the results of the two methods did not differ. However, for samples containing >2% lipid, the Bligh and Dyer method produced significantly lower estimates of lipid content, and this underestimation increased significantly with increasing lipid content of the sample. In the highest lipid samples, lipid content was underestimated by up to 50% using the Bligh and Dyer method. However, we found a highly significant linear relationship between the two methods, which will permit the correction of reported lipid levels in samples previously analyzed using an unmodified Bligh and Dyer extraction. In the future, modifications to procedures and solvent/sample ratios should be described.