磺酸共聚物的合成及性能研究

以2—丙烯酰胺—2—甲基丙磺酸(AMPS)与丙烯酸(AA)等为反应物使其进行共聚反应，合成了2组三元共聚物，讨论了共聚物的阻垢效果与引发剂用量、反应温度、反应时间之间的关系，对产品的阻垢分散性能进行了评价，井与其它阻垢分散剂进行了比较。     

Ti—HMS的合成和催化苯乙烯环氧化性能研究

利用中性伯胺（十二胺）作模板剂,合成了过渡金属Ti取代的HMS中孔材料,XRD和FT－IR表征表明Ti能有效嵌入HMS骨架壁中而不会造成其中孔有序度的下降,钛在HMS中的嵌入量是随合成原料Ti/Si的增加而上升的,最高可达1．61mmol Ti.g^-1HMS,IR中960cm^-1带强度与钛嵌入量呈正比,这可能表明960cm^-1是由钛嵌入中孔骨架而引起硅氧四面体结构发生畸变所致。催化实验结果表明,Ti-HMS能有效地催化叔丁基过氧化氢（TBHP）氧化苯乙烯生成环氧苯乙烷（65％－85）,苯乙醛（6％－15％）和苯甲醛（8％－20％）,且能重复使用数次而不失活,此外催化剂的制备条件和反应条件对其活性和产物分布也有不同程度的影响。     

含醚基磺酸基聚合物的合成及性能研究

以乙烯基异丁醚(VIBE)、丙烯酸(AA)、2-丙烯酰胺-2-甲基丙磺酸(AMPS)为单体,合成了单体比例不同的系列聚合物.采用静态阻垢法评价了其对碳酸钙、磷酸钙的阻垢性能和对氧化铁以及锌盐的分散性能.结果发现,含醚基磺酸基聚合物具有临界值效应,对碳酸钙的阻垢作用,对氧化铁、锌盐的分散作用要优于AA/HPA/AMPS聚合物,其中醚基含量越高,其对碳酸钙垢的阻垢作用和对锌盐的分散作用越好,但对磷酸钙垢的抑制作用要比AA/HPA/AMPS聚合物低.     

磺酸共聚物的合成及阻垢分散性能的研究

以水为溶剂，选择磺酸单体与丙烯酸等进行共聚，合成了二组二元共聚物，对所得产品进行的静态阻垢试验表明，在所考察的因素中，单体配比对共聚物阻垢性能的影响最大。同时发现，合成的磺酸共聚物在阻磷酸钙垢和稳定锌方面，存在着“临界值效应”，其性能优于进口的Ｔ－２２５。     

碱催化聚醚—聚酰胺6嵌段共聚物的性能

以氢氧化钠为催化剂、端酰基内酰胺基聚醚为活化剂,引发己内酰胺阴离子聚合。以抽提法测定聚合物的转化率,示差扫描量热法测定结晶度、结晶温度、并测定其密度、维卡软化点等性能,研究聚醚种类、活化剂结构及用量对上述共聚物性质的影响。     

环戊烯催化氧化合成戊二醛

介绍了以50％的H2O2为氧化剂，钨酸为催化剂，经环戊烯路线合成戊二醛的研究情况，研究结果表明了此氧化反应不能在基介质中进行，在反应温度40摄氏度，常压等较温和的条件下，产品收率达59％以上。     

磺酸型固体催化剂催化合成乙酸乙酯

苯乙烯/丙烯磺酸共聚物(St-c-AS)作为一种高效、无污染、可重复利用的固体酸催化剂被用于乙酸和乙醇的酯化反应中。实验结果表明,该催化剂具有较高的催化活性,催化剂不需分离可重复使用10次,酯化产率达到90%以上。与传统的硫酸催化剂相比,St-c-AS为催化剂所得的产品无需除酸,后处理简单,对环境无污染,是一条合成乙酸乙酯的绿色途径。     

氨磺酸催化合成己二酸二丁酯的研究

研究了以氨磺酸为催化剂,己二酸和正丁醇为原料合成己二酸二丁酯,并考察了影响反应的影响。结果表明,醇酸摩尔比为3：1,催化剂用量为0．5g（己二酸为0．05mol的情况下）,带水剂甲苯为5mL,反应时间为1.5h是最适宜的反应条件,酯化率达99．3％。     

凹凸棒石／CeO_2复合纳米材料的合成、表征及催化性能

以大比表面积的凹凸棒石为载体,利用均匀沉淀法制备了具有高吸附性能的凹凸棒石/CeO2纳米复合催化剂,并采用X射线衍射、透射电镜、比表面积对负载了不同含量CeO2的凹凸棒石的结构进行了表征,探讨了反应温度和煅烧温度对复合材料形貌的影响,并研究了在CO催化氧化反应中不同CeO2负载量复合物的催化性能.结果表明:合成凹凸棒石/CeO2纳米复合材料的最佳反应温度为75℃,煅烧温度为200℃,此时50%负载量样品的比表面积最大,为223.8m2/g:凹凸棒/CeO2纳米复合纳米催化剂具有很强的协同催化效应,从而提高了催化活性,且CeO2负载量为50%～100%的复合材料的催化效果较好.     

丙烯酸／丙烯酸羟丙酯／不饱和磺酸二元共聚物合成及阻垢性能

以丙烯酸、丙烯磺酸、磺化马来酸丙烯酰胺、２－丙烯酰胺－２－甲基丙烷磺酸、丙烯酸羟两酯为原料，过硫酸铵为引发剂制备了一系列三元共聚物，并研究了其阻垢分散性能。结果表明，按一定配比制备的共聚物对碳酸钙垢或磷酸钙垢等具有优异的阻垢分散性能。     

ZnAl水滑石负载钯催化剂的制备及催化性能

采用离子交换-还原法制备了系列锌铝水滑石负载钯催化剂Pd/ZnAl-LDH,通过XRD、TEM和ICP对该系列催化剂进行了表征,并对其在低毒溶剂乙醇或水中苯甲醇氧化反应的催化性能进行了详细考察。研究结果表明,反应溶剂、Pd负载量、氧气压力、反应时间等对催化剂的催化性能有很大的影响,当Pd负载质量分数为2%,反应压力为0.2MPa时,Pd/ZnAl-LDH在乙醇溶剂中表现出最佳的催化性能,苯甲醇转化率和苯甲醛选择性可分别达到93.3%和93.6%。     

Preparation and characterization of macroporous phenol‐furfural sulfonic acid resin catalyst

The macroporous phenol‐furfural sulfonic acid resin catalyst (PFuSR) was prepared. The resin was characterized by chemical analysis, thermal analysis, scanning electron microscopy, Fourier transform infrared spectroscopy, and reactions of esterification. There exist in PFuSR different kinds of acidic groups such as ? OH, ? COOH, and ? SO₃H. The catalytic relative activity of PFuSR in the reaction of acetic acid and n‐butanol is 104 times that of macroporous polystyrene sulfonic acid resin D72. Thermal analysis showed that PFuSR did not begin to desulfonate until temperatures of 220°C were reached. The resin is suitable for use continually up to 200°C, verified by successfully performing the reaction of maleic anhydride with 2‐ethyl‐1‐hexanol to form di‐2‐ethylhexyl maleate. © 2001 John Wiley & Sons, Inc. J Appl Polym Sci 80: 1764–1769, 2001     

纳米氧化铈的制备及其催化性能

纳米氧化铈是新兴的催化材料,在化学工业和环境污染控制方面有着广泛的应用前景。对近年来国内外制备纳米氧化铈材料的不同方法进行了阐述和比较。其中溶胶-凝胶法和沉淀法工艺已经较为成熟,而其他方法,如共沸精馏法、冰冻脱水法、水解法、气相法、微乳液法、表面修饰法、液-液两相法、熔融法、固相反应法等,都还需要进一步完善。对纳米氧化铈的催化性能进行了研究,研究表明,纳米氧化铈的催化性能大大优于传统的非纳米氧化铈粉体。     

对甲苯磺酸催化合成乙酸丁酯的研究

研究了以对甲苯磺酸为催化剂 ,乙酸和正丁醇为原料合成乙酸丁酯 ,并考察了影响反应的因素。结果表明 ,醇酸摩尔比为 1 2∶1,催化剂用量为 0 8g(乙酸为 0 2mol的情况下 ) ,带水剂环己烷为 5ml,反应时间为 2 0h是最适宜的反应条件 ,酯化率达 96 9%     

甲基磺酸催化合成苯甲醛VC缩醛的研究

以苯甲醛与VC为原料,N,N-二甲基乙酰胺为溶剂,甲基磺酸为催化剂,环己烷为带水剂,合成了苯甲醛VC缩醛。考察了原料配比、催化剂用量、溶剂用量、回流温度对反应收率的影响。最佳条件为:苯甲醛、VC与甲基磺酸的物质的量的比为1∶1.5∶0.25(摩尔比),溶剂用量0.75 L,回流温度120℃,反应时间4.0 h。产物结构用IR、熔点测定和元素分析确认。     

纳米Au-Pd@Ce修饰介孔磷酸铝的制备及其催化氧化环己烷性能

采用水热合成法制备Ce修饰介孔磷酸铝,再通过原位还原法负载纳米Au-Pd制备催化剂;通过以空气为氧化剂的环己烷选择性氧化反应测试催化剂的催化性能,并考察水热温度、Ce掺杂量、负载贵金属对催化剂催化氧化环己烷的的影响。结果表明,以140℃水热制备的Ce掺杂质量分数为0. 15%的Ce0. 15-APO(140)负载Au-Pd双金属(Au与Pd质量比3∶1)催化剂活性最高。在反应温度120℃,空气压力1 MPa和反应1 h的条件下,环己醇+酮的产率可达11. 81%,选择性达99%,催化剂在同样条件下循环使用5次,活性无明显下降。     

Pt-Sn/SBA-15催化剂的制备、表征和长链烷烃脱氢催化性能

A series of the Pt-Sn/SBA-15 catalysts were prepared and their properties characterized by using X-ray powder diffraction （XRD）, N2 adsorption-desorption, high resolution transmission electron microscope, X-ray photoelectron spectroscopy （XPS） and H2-temperature programmed reduction. Their performances in long chain alkane dehydrogenation were evaluated in a fixed-bed microreactor with dodecane as a model alkane. The results indicated that SBA-15 maintained the well-order mesoporous structure during the reaction. The performance of the catalyst was found not dominated by its textural properties, but by the molar ratio of Sn to Pt which governed the degree of Sn reduction. Owing to the highest degree of Sn reduction, 1% （by mass） Pt-1.8% （by mass） Sn/SBA-15 showed the best catalytic activity. At 0.1 MPa and 470℃, the molar ratio of hydrogen to alkane at 4, and liquid hourly space velocity （LHSV） 20 h^-1, the dodecane conversion is 10%, and the dodecene selectivity is about 70%.     

类水滑石CuNiAl的制备、表征及其催化性能的研究

采用水热法和尿素水解法首次合成了三元类水滑石CuNiAl(Cu+Ni/Al=3,Cu/Ni=5.0,3.0,1.0,0.33),将合成的类水滑石用于苯羟基化反应。采用X射线衍射(XRD)、傅里叶变换红外光谱(FT-IR)、扫描电镜(SEM)和透射电镜(TEM)等手段对类水滑石进行表征,以CuNiAl31作为催化剂,考察了反应时间、反应温度、溶剂及溶剂用量、催化剂用量、n(benzene)/n(H_2O_2)对苯羟化反应的影响。结果表明:与CuNiAl11、CuNiAl21、CuNiAl13催化剂相比,CuNiAl31具有较高的反应活性,反应的最佳条件为:反应时间6h、反应温度65℃、15 ml吡啶作为溶剂、10mg催化剂、n(benzene)/n(H_2O_2)=3.0时,苯的转化率为7%,苯酚的选择性几乎为100%。     

Synthesis and characterisation of side chain liquid crystal copolymers containing sulfonic acid groups

A series of novel side chain liquid crystal copolymers, the poly[10-(4-methoxy-4′-oxy-azobenzene) decyl methacrylate]–co-poly[2-acrylamido-2-methyl-1-propanesulfonic acid]s (10-MeOAzB/AMPS-x/y) have been synthesised by free radical copolymerisation. The mol fraction of the sulfonic acid-based group, AMPS, has been varied over a broad range of composition in the copolymers, and these have been characterised using differential scanning calorimetry (DSC), polarised light microscopy (PLM), Fourier Transform Infrared Spectroscopy (FTIR) and X-ray diffraction (XRD). The liquid crystal homopolymer and copolymers containing up to 0.54 mol fraction AMPS-based units, all exhibit a smectic A phase, while at higher mol fraction AMPS-based groups, liquid crystallinity is extinguished and the copolymers are amorphous. The local packing arrangements within the smectic A phase varies with composition attributed, in part, to phase separation between acid rich domains and liquid crystal regions. The dependence of the transitional properties on copolymer composition may be interpreted in terms of the packing efficiency of the mesogenic side chains and hydrogen bonding between the sulfonic acid groups, as a consequence of increasing the concentration of acid-based groups.     

Swelling properties of copolymers of styrene and divinylbenzene containing sulfonic and carboxylic acid groups

Copolymers of styrene, divinylbenzene, and acrylic acid that have undergone sulfonation exhibited good water absorbency properties. Removal of the lower molecular weight fraction in the surface region of the copolymer particles by toluene extraction before sulfonation has further increased the water swelling capacity of the sulfonated copolymers. The extent of swelling of the UV‐irradiated copolymer could be related to the ratio of divinylbenzene to styrene. The less crosslinked copolymers were shown to absorb more water. The incorporation of more carboxylate groups in the copolymer could further increase its swelling capacity. Without UV irradiation, the carboxylate containing copolymer was found to absorb more water than the sulfonated copolymer. UV irradiation has induced more effective crosslinking in the carboxylate containing copolymer, hence impairing its water absorbency. By replacing styrene and divinylbenzene partially with butyl acrylate, whereby the amount of crosslinking was reduced, the copolymer was able to absorb water 110 times of its dry weight. © 2008 Wiley Periodicals, Inc. J Appl Polym Sci, 2009