高分子水处理剂的绿色化研究进展

简要介绍了近年来水处理领域在高分子水处理剂产品及生产工艺方面的绿色化研究进展状况。     

超细粉体微胶囊红磷阻燃剂的研制

红磷经湿法研磨预处理，在一定pH值（9．0－9．5），表面活性剂用量为0．8％－1．0％，2200Hz超声波振荡15min后，采用蜜胺树脂预聚体原位法包覆，制得了微胶囊红磷阻燃剂的超细粉体，其平均粒径为2．186um，并探讨了预处理，PH值，表面活性剂及超声波对粒度的影响。     

相转移催化氧化合成苯甲酸

研究了季铵盐CTAB催化高锰酸钾氧化氯化苄合成苯甲酸的反应。考察了CTAB用量、高锰酸钾用量、反应温度、反应时间对反应的影响。结果表明,合成苯甲酸的最优条件为:高锰酸钾与氯化苄的摩尔比为2∶1,CTAB的摩尔分数为氯化苄的8%,反应温度90℃,反应时间为3h,苯甲酸的产率可达89%。     

基于随机词汇迭代模型的POI分类检索

从特征选择、局部区域划分和词汇语义相似性计算入手,利用随机词汇迭代模型(random terms iterativemodel,RTIM)进行海量兴趣点(point of interest,POI)文本分类.通过词汇频度、集中度和离散度方法筛选出特征词汇;依据文本与各POI类别间的相似度进行局部区域划分;在每个局部区域内基于词汇在文本中的排列顺序构建词频向量,基于词频向量中词频的随机删除和重构,获取特征映射矩阵;通过特征映射矩阵将文本转为特征向量,并采用SVM分类器进行POI文本分类.实验证明,该方法有效提升了POI文本分类准确性和覆盖率.     

PVC-U异型材塑化度的评价

比较了4种评价PVC-U塑化度的方法:目测法简单;溶剂法迅速,容易操作;拉伸法可定量判断,但需要大量样品;DSC法准确、方便。     

5-硝基愈长木酚的合成

5-硝基愈创木酚作为高效、低毒植物调节剂,一直倍受关注.它的合成目前主要采用愈创木酚硝化法,以发烟硝酸和冰醋酸混酸做硝化剂.本文由愈创木酚为起始原料,经酚酯化、硝化、水解等步骤合成了5-硝基愈刨木酚.酚酯化采用碱催化法,收率可达96%以上;硝化反应则采用乙酸酐和硝酸混合物为硝化剂.5-硝基愈创木酚最高收率可达到91%.     

Preparation and Photoluminescence of Partially Filled ZnO Microtubes Using Block Copolymers

Partially filled ZnO microtubes were synthesized in large scale using block copolymers. The growth mechanism of this unique construction is proposed on the basis of adsorption of block copolymers on {0002} plane of wurtzite ZnO. The photoluminescence property of these unique ZnO microtubes is also studied using a Xe lamp as the excitation source at room temperature. Blue emission band at 425 nm is a much stronger ultraviolet emission band, which is due to laminar structure of ZnO microtubes.     

白色纯聚酯粉末涂料的性能研究

简要介绍了粉末涂料的特点 ,并从涂膜性能的优化角度论述了粉末涂料原料的选择和使用情况。从羧基聚酯树脂 -TGIC体系纯聚酯粉末涂料配方设计入手 ,研究了基料、填料、助剂对其涂膜性能 (主要物理机械性能 :涂膜之耐冲击力、柔韧性、倾斜流动性、硬度、附着力、抗UV老化等 )的影响 ,得到了一个在给出原料中涂膜综合性能最好的配比     

Ru-doped nanostructured carbon films

Pure and Ru-doped carbon films are deposited on Si (100) substrates by electron cyclotron resonance chemical vapor deposition. The films are characterized by transmission electron microscopy, electron energy loss spectroscopy, energy dispersive X-ray spectroscopy and atomic force microscopy. In both the pure and Ru-doped samples, diamond nanocrystallites are formed in amorphous carbon matrices. The Ru-doped film contains much smaller diamond nanocrystallites (approx. 3 nm) than the pure samples (approx. 11 nm). Lower surface roughnesses are observed in both pure and Ru-doped samples as compared to other reported nanocrystalline diamond films. The conductivity of the Ru-doped film is significantly higher than that of the pure film. The results show that Ru-doped nanocrystalline diamond films have unique structures and properties as compared to pure nanocrystalline diamond films or metal doped diamond-like carbon films, which may offer advantages for electrochemical, optical-window, field emission or tribological applications.     

纳米复相陶瓷

纳米复相陶瓷以其优异的性能受到大家的关注，成为陶瓷研究领域的研究热点。本文在介绍纳米复相陶瓷分类、材料设计和制备的同时，着重阐述了纳米复相陶瓷中纳米颗粒对材料的显微结构和性能的影响。