导电油墨印刷适性的探讨

导电油墨是一种特殊的油墨,主要用在丝网印刷中。现从国外引进了一种新的导电油墨,本论文试从导电油墨的种类、印刷适性以及导电的稳定性等方面进行探讨。本课题的探讨,不仅可以推动此油墨的广泛应用,而且为以后开发和研制这种油墨提供了参考价值。     

导电聚苯胺/聚甲基丙烯酸甲酯复合膜的合成及特征

采用原位氧化聚合法合成了聚苯胺(PAn)／聚甲基丙烯酸甲酯(PMMA)复合材料．通过溶液浇铸的方法制成了性能优良的可溶性导电自支撑膜，电导率达10^-2S／cm；考察了各种反应条件对复合膜电导率的影响，获得了最佳的聚合反应条件，并进行了环境稳定性测试，其循环伏安曲线表明聚苯胺具有稳定的电化学活性，元素分析结果表明复合的聚苯胺存在一饱和值，超过饱和值，提高聚苯胺的含量对电导率影响不大，并对复合膜进行了红外光谱测试．     

用于织物和聚氨酯泡沫复合的胶乳

合成了一种可用于帆布／聚氨酯泡沫复合以及涤纶／聚氨酯泡沫复俣的共聚乳液 影响复合胶性能的一些主要因素,并将该复方胶与其它胶粘剂作了比较。     

无机胺合成的ZSM-5沸石对甲苯烷基化反应的催化作用

对氨水为模板剂合成的ZSM - 5沸石分子筛进行改性 ,用于甲苯甲醇烷基化反应。实验结果表明 ,(H)ZSM - 5有较好的催化活性。当用MeO对 (H)ZSM - 5进行改性后 ,随着MeO含量的增加 ,催化反应的活性降低而生成对二甲苯的选择性升高 ,这是因为MeO覆盖了部分的强酸中心所致     

表面修饰铂的铜纳米颗粒的制备及催化性能

为探索表面修饰铂的铜纳米颗粒的催化性能,分别以硫酸铜、氯铂酸为前驱物、硼氢化钾为还原剂制备了溶剂稳定的铜和铂纳米颗粒;并以铜纳米颗粒为种子、将氯铂酸溶解其中,在以硼氢化钾为还原剂的基础上制备了表面修饰了铂的铜纳米颗粒。所制备的三种纳米颗粒均为球形,粒径分别为1.7 nm、2.1 nm、2.4 nm.在30℃、1.01×105Pa的条件下,所制备的表面修饰了铂的铜纳米颗粒在环己烯的催化加氢反应中具有比铂纳米颗粒和铜纳米颗粒更高的催化活性。     

不同形貌纳米氧化铜的合成及导热应用

纳米氧化铜(CuO)在传感器、催化及强化传热领域有优异的性能。以微生物法浸取的Cu~(2+)为铜源,通过改变溶液的pH制备不同形貌的纳米CuO,并对产物进行表征与分析。制备了以硅油为基体的含纳米CuO的纳米流体,并测试了其热导率。结果表明,纳米流体的热导率与添加CuO的体积分数基本呈线性关系。当添加相的体积分数为5%时,片状、梭子状和蒲公英状的CuO纳米流体热导率分别提高了12.3%、12.9%和29.0%。这说明CuO的形貌对复合体系的热导率有显著的影响,其中蒲公英状的纳米材料效果最佳。     

导电悬臂梁磁弹性弯曲的辛解答

在弹性力学平面直角坐标辛体系中,采用Hamilton理论和分离变量法,对非铁磁介质导电悬臂梁,通入电流并在外部电磁场作用下的弯曲问题进行了研究。求解了悬臂梁在受洛仑兹力作用时挠度与应力状态的辛解答,并讨论了相关参数的变化对梁挠度和应力状态的影响,从而扩展了磁弹性领域的求解方法。     

Synthesis of A Novel Photosensitive Prepolymer with Trimethylolpropane Triglycidylether and Acrylic Acid as Starting Materials

A novel photosensitive prepolymer of trimethylolpropane triglycidylether triacrylate was synthesized by utilizing trimethylpropane triglyridylether anti acolic acid as two starting materials, triphenyl phosphine as catalyst and p- hydroxyanisole as inhibitor. The optimum synthesis conditions were that the conceutration of triphenyl phosphine wets 0. 85wt% of reactants, the conceutration of p-hydroxyanisole was 0. 3wt% of reactants, and the reaction temperature was at 90-110℃ . Benzil dimethyl ketal of a UV-cured initiator was added to the synthesized trimethylolpropane triglycidylether triacrylate to prepare a kind of UV-cured coating. The mechanical properties of the UV-cured films were determined, giving 28.43 MPa of tensile strength, 965 . 59 MPa of Young‘ s modulus and 4.10% of elongation at tear.     

DMAc used as a reducer for preparation of spherical silver nanoparticles with high dispersion

A silver nanoparticle(Ag NP) with good monodispersity was produced by a convenient method for reducing of Ag NO3 with N, N-dimethylacetamide in the presence of polyvinyl pyrrolidone(PVP) as the surface modification agent. The shape and size of the Ag NP with reaction time were taken as variables. The surface plasmon band transition was monitored with reaction mixture time at different temperatures. The Ag NP crystallinity increases with the reaction time, and the reduction efficiency is very low when Ag NP solution is dealt at room temperature even after two days, while it is greatly improved at 160 °C only for 25 min. Ag NP modified by the as-synthesized PVP has a face-centered cubic crystalline structure, in which Ag NP could develop into a spherical morphology with a very narrow size distribution of 2-11 nm. The preparation provides a new reducing agent to form Ag NP with simpler operation and shorter time.     

A Cu-Cr alloy with nano and microscale Cr particles produced in a water-cooled copper mold

Microstructures have profound effects on the hardness and strength of Cu-Cr alloys. The microstructures of a Cu-Cr alloy cast in a water-cooled copper mold were studied in the present work. The scanning electron microscopy (SEM) results show that there are the copper matrix saturated with chromium, spherical precipitates of chromium separated from liquid phase during cooling before the initiation of so- lidification, and a eutectic phase in grain boundary areas. To investigate the effect of age-hardening tr...     

利用废报纸合成树脂并提取废水中的铜离子

以废旧报纸作为纤维素原料，合成螯合树脂，用以提取废水中的铜离子。为了提高螯合树脂对重金属离子的提取率，在螯合树脂上引入乙酰乙酸基，并对其吸附水溶液中铜离子的能力进行了研究。结果表明所合成的螯合树脂对铜离子有良好的吸附能力，可以重复利用多次，在同等条件下，重复使用的提取率均不低于85％。     

Synthesis of a novel UV-curable prepolymer polypropyleneglycol diglycidyl ether diacrylate

A novel UV-curable prepolymer polypropyleneglycol diglycidyl ether diacrylate （PPGGEA） was synthesized by utilizing polypropyleneglycol diglycidyl ether （PPGGE） and acrylic acid （AA） as starting materials, N, N-dimethylbenzylamine as catalyst and p-hydroxyanisole as inhibitor. The optimum synthetic conditions were in the following： the concentration of N, N-dimethylbenzylamine was 0.80 wt% of reactants, the concentration of p-hydroxyanisole was 0.3 wt% of reactants, the reaction temperature was 90-110 ~C, and the molar ratio of PPGGE to AA was 1：2.2. Meanwhile, 1-hydroxycyclohexyl phenyl ketone of a UV-cured initiator was added to the synthesized PPGGEA to prepare a kind of UV-cured coating. The mechanical properties of the UV-cured films were determined, giving 29.99 MPa of tensile strength, 834.27 MPa of the Young＇s modulus and 5.66% of elongation at tear.     

利用废报纸合成树脂并提取废水中的铜离子

以废旧报纸作为纤维素原料 ,合成螯合树脂 ,用以提取废水中的铜离子。为了提高螯合树脂对重金属离子的提取率 ,在螯合树脂上引入乙酰乙酸基 ,并对其吸附水溶液中铜离子的能力进行了研究。结果表明所合成的螯合树脂对铜离子有良好的吸附能力 ,可以重复利用多次 ,在同等条件下 ,重复使用的提取率均不低于 85 %     

甲烷磺酸铜催化合成丁酸苄酯的性能

以甲烷磺酸铜为催化剂合成丁酸苄酯,考察了催化剂用量、反应时间、醇酸物质的量比对酯化率的影响。实验表明:丁酸0.167 mol,醇酸物质的量比1.2:1,甲烷磺酸铜用量0.125％(基于丁酸的摩尔分数),反应时间2.0~2.5 h,环己烷5 mL作带水剂,在回流温度下酯化率可达96.9％;与其它几种Lewis酸相比,甲烷磺酸铜具有较高的催化活性,反应后易与产物分离,催化剂重复使用8次,酯化率仍达到94.5％以上。     

Synthesis of a macromer, MPEGAA, used to prepare an AMPS-modified polyacrylic acid superplasticizer

A macromer, methoxypolyethylene glycol acrylate （MPEGAA）, was synthesized by direct esterification using methoxypolyethylene glycol （MPEG-1200） and acrylic acid （AA） as the main materials. MPEGAA was then used to prepare a polyacrylic acid superplasticizer modified with 2-acrylamido-2- methylpropane sulfonic acid （AMPS）. A single-factor test was performed to investigate the effects of the molar ratio of acid to alcohol （n（AA）/n（MPEG））, inhibitor amount, catalyst amount, temperature, and time of esterification on the synthesis of MPEGAA. The experimental results showed that the optimal esterification conditions were as follows： n（AA）/n（MPEG）, 3.5：1; amount of hydroquinone （as an inhibitor）, 1.2%; amount of para-toluenesulfonic acid （as a catalyst）, 5.5%; reaction temperature, 95 ~C; and reaction time, 6 h. The AMPS- modified polyacrylic acid superplasticizer prepared under the optimal esterification conditions enabled the achievement and maintenance of high cement dispersibility. At an admixture amount of 0.15%, the cement paste fluidity was initially as high as 300 mm, and then decreased to 315 mm after 1 h and to 290 mm after 2 h.     

Zn、A1改性Cu／SiO2催化剂及其对草酸二甲酯加氢合成乙二醇催化性能的影响

采用溶胶凝胶法制备Cu／Si02催化剂．考察助剂Zn、A1对Cu／SiO2催化剂在草酸二甲酯（DMO）加氢合成乙二醇（EG）催化反应中催化性能及其稳定性的影响,并采用TPR、BET、XRD等方法表征催化剂结构．结果表明：加入助剂zn后,Cu／SiO2催化剂的催化活性有所提高,在反应温度205℃、压力常压、氢酯摩尔比80、液时空速0．4h-1条件下,草酸二甲酯加氢制乙二醇的收率达到97％;加入助剂A1后,在同样的反应条件下,Cu／SiO2催化剂的催化活性有所降低,乙二醇的收率为90％左右．在催化剂中加入助剂zn、A1后,催化剂的稳定性均有所下降,在反应3h后,DMO的转化率开始逐渐降低．     

Observing Intratissuelar Distribution of Polysorbate 80 Coated Nanoparticles in Brain with Analytical Electron Microscopy

1Introduction Theblood brainbarrier(BBB)representsaninsur mountableobstacle,whichhinderswater solublemole culesandthosewithmolecularweightabove500,suchas thetherapeuticpeptides,proteins,genesandantibiotics,fromthecircularsystemtothebrain[16].Itwasreported…     

三叶草对土壤中铜和铅的吸收及其相互影响研究

采用盆栽实验就三叶草对铜和铅的吸收进行了研究,重点探讨了三叶草吸收两种重金属之间的交互作用。结果表明,生长一个月左右的三叶草对铜和铅的吸收在实验条件下均随土壤中相应元素浓度的增加而增加,但铜和铅之间存在着明显的拮抗作用。土壤中的铜和铅浓度对三叶草吸收相应元素的影响均可用非线性回归方程进行良好的拟合。研究铜与铅对于植物三叶草吸收的相互影响,可为重金属污染土壤的植物修复和土壤污染临界值的制订提供参考。     

对苯二甲酸降解微生物的驯化及筛选

从涤纶织物加工厂废水处理系统中取活性污泥获得菌源，分别提供不同的培养条件，经约40d驯化筛选得到约200株对苯二甲酸(TA)降解微生物．采用平板分离法分离出186株，通过对其分解能力的测定，又选出生长势态良好的28株，其中9-18B菌株对TA降解率接近100％。     

Synthesis of a novel UV-curable prepolymer hexanediol diglycidyl ether diacrylate and its cured film tensile property

A novel UV-curable prepolymer hexanediol diglycidyl ether diacrylate (HDGEA) was synthesized by utilizing hexanediol diglycidyl ether (HDGE) and acrylic acid (AA) as starting materials, N, N-dimethylbenzylamine as catalyst and p-hydroxyanisole as inhibitor. The optimal synthetic conditions were that the concentration of N, N-dimethylbenzylamine was 0.80 wt% of reactants, the concentration of p-hydroxyanisole was 0.3 wt% of reactants, the reaction temperature was 90-110 ℃, and the molar ratio of HDGE to AA was 1︰2.2. Meanwhile, 1-hydroxycyclohexyl phenyl ketone of a UV-curing initiator was added to the synthesized HDGEA to prepare a kind of UV-curing coating. The mechanical properties of the UV-cured films were determined, giving 31.87 MPa of tensile strength, 871.88 MPa of Young’s modulus and 6.77% of elongation at tear.