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| 1 | Preparation and characterization of polyphenylene sulfide-based chelating fibers显示文摘A series of novel chelating fibers containing sulfur,nitrogen,oxygen heteroatoms were prepared via the functionalization of chloromethylated polyphenylene sulfide(CMPPS).The structures,micromorphology and physicochemical properties of these fibrous adsorptive materials were characterized by FT-IR,elementary analysis,TG and SEM-EOS.The results show that chelating fibers had high functional group contents(3.94 mmol/g for thiourea,3.85 mmol/g for mercapto,5.00 mmol/g for methylamine and6.07 mmol/g for ethylenediamine.respectively).Owing to the unique matrix of polyphenylene sulfide fiber,these fibrous adsorbents possess excellent thermostability.This synthetic method proved a simple and efficient way for the preparation of chelating fibers. | Dong-Ju Zhou Li-Bo Dai Hui Ni Gen-Lei Hui Si-Guo Yuan | 2014 | Chinese Chemical Letters2014，25，2： | 5 |
| 2 | Synthesis of new superabsorbent poly(NIPAAm/AA/N-allylisatin)nanohydrogel for effective removal of As(Ⅴ) and Cd(Ⅱ) toxic metal ions显示文摘The present studies highlight the effective removal of As(V) and Cd(II) from aqueous solutions by superabsorbent poly(NlPAAm/AA/N-allylisatin) nanohydrogel.Batch removal studies were performed as a function of treatment time,initial metal ion concentration,pH,and adsorbent dose.TEM micrographs confirm the particle size distribution in the range between 5 nm and 10 nm.The simple and metal ions adsorbed nanohydrogels were characterized by FT-IR,TGA,and EDX analysis.Finally,the equilibrium removal efficiency of the nanohydrogel was analyzed according to the Langmuir and Freundlich adsorption isotherm models which showed the removal of As(V) and Cd(II) metal ions fitted to Freundlich and Langmuir isotherms,respectively.Removal efficiency order of the metal ions is As(V) > Cd(II). | Viran P.Mahida Manish P.Patel | 2014 | Chinese Chemical Letters2014，25，4： | 5 |
| 3 | PP-g-GMA-DETA螯合纤维对Pb2+的吸附研究显示文摘采用FT-IR、SEM对PP-g-GMA-DETA螯合纤维进行表征,并探究纤维对Pb2+的吸附特性及吸附机理。结果表明,PP-g-GMA-DETA螯合纤维对Pb2+的饱和吸附量为52.03 mg/g;在pH为2~5时吸附量随着pH的升高而增大,且随Pb2+初始浓度的增加而增大,并在Na+、Mg2+、Ca2+、Fe3+存在的竞争吸附过程中表现出选择性;吸附过程符合准二级动力学模型,主要受化学作用控制,半饱和吸附时间为13 min;吸附等温线符合Langmuir吸附等温线模型,为单分子层吸附,纤维可再生重复使用。 | 钱慧 付志浩 陈思 周清 连洲洋 魏无际 卢皓 | 2019 | 工业水处理2019，39，9： | 3 |
| 4 | Synthesis and morphology control of raspberry-like poly(ethylene terephthalate)/polyacrylonitrile microspheres显示文摘The fabrication of raspberry-like poly(ethylene terephthalate)/polyacrylonitrile(PET/PAN) microspheres by g-ray radiation-induced polymerization of acrylonitrile on micron-sized PET microspheres were first reported in this work. A PET emulsion was firstly prepared by dispersing a PET solution with 1,1,2,2-tetrachloroethane/phenol mixture as the solvent into an aqueous solution of sodium dodecyl sulfate.Then, PET microspheres were formed by precipitating the PET emulsion droplets from ethanol. The influence of the PET solvent and the weight ratio of ethanol to PET emulsion on the morphology of the PET microspheres had been investigated. After the surface of the prepared PET microspheres was grafted with poly(acrylic acid), the grafting polymerization of AN also had been successfully initiated by g-ray radiation to form PAN microspheres with a size of about 100 nm on the PET microspheres. This work provides a new method to fabricate micron-sized PET microspheres, and further expands the functionalization of PET and its application fields. | Yong-Fei Xu Mo-Zhen Wang Qi-Chao Wu Xiao Zhou Xue-Wu Ge | 2016 | Chinese Chemical Letters2016，27，2： | 2 |
| 5 | Voltammetric determination of stability constants of lead complexes with diallyl disulfide, dimethyl disulfide, and diallyl sulfide显示文摘The complexation of Pb^(2+)by diallyl disulfide(DADS), dimethyl disulfide(DMDS) and diallyl sulfide(DAS)has been studied by differential pulse voltammetry. Stability constants,(log b), of the 1:1(PbL) and 1:2(PbL_2) complexes, where L = ligand, were found to be in the range of ca. 3.8–4.2 and 9.4–10.2,respectively. Complex formation is accompanied with a significant decrease in the peak current and the shift of the Pb2+/Pb half-wave potential to a higher one upon the addition of the sulfur containing ligands(L). The formation of 1:1 and 1:2 complexes, i.e., PbL^(2+)and PbL_2^(2+)was observed in the case of the three ligands. The consecutive formation constants of labile lead complexes with DADS, DMDS, and DAS were determined at 298 K by the method of De Ford and Hume. Apparently due to the large size of the lead ion,steric hindrance caused by the greater steric bulk of DADS compared to that of DMDS have little or no effects on the formation constants, so that very similar values were obtained in the case of the two ligands. Also, the possible participation of C=C double bonds in coordination with the metal center in the case of DADS appears to compensate for the steric effects caused by the larger size of this ligand. In agreement with the Jorgensen principle of symbiosis, the second formation constants were found to be approximately six orders of magnitude greater than the first ones. | Mohammad Ali Kamyabi Fatemeh Soleymani-Bonoti Saeed Zakavi | 2016 | Chinese Chemical Letters2016，27，1： | 0 |
| 6 | 聚(N-(2-乙氨基))天冬酰胺的合成及其对Pb^(2+)和Cu^(2+)螯合的研究显示文摘通过聚琥珀酰亚胺(PSI)与乙二胺的加成反应得到聚(N-(2-乙氨基)天冬酰胺)(PEAA),可以实现在水溶液中与Pb^(2+)和Cu^(2+)螯合,Pb^(2+)的最大螯合量为49.81 mg/g,去除率为92.98%;Cu^(2+)的最大螯合量为19.01 mg/g,去除率为83.62%。通过红外光谱(FT-IR)和X射线光电子能谱(XPS)对Pb(4f)和Cu(2p)的吸附机理进行了表征,结果表明金属离子通过配位键吸附在PEAA的酰胺、氨基和羧基上。通过扫描电子显微镜(SEM)发现,PEAA的表面粗糙,内部圆形孔分布相对均匀,有利于吸附的发生。因此,PEAA可作为去除重金属离子的新型环保螯合剂。 | 杨萤 马博锐 王芳 马政生 | 2022 | 化学世界2022，63，1： | 0 |
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