Materials Literature
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Development of highly efficient and low cost LEDs makes possible to design lamps exploiting completely new concepts. In this perspective transparent polymer nanocomposites can play a fundamental role. In particular, a material that exhibits Rayleigh diffusion -i.e. having a scattering efficiency inversely proportional…
用电子显微镜研究了合金元素Cu在Zr-2.5Nb-0.5Cu合金及其腐蚀生成氧化膜中的存在形式。合金基体中的元素Cu主要以四方结构的CuZr2第二相形式存在,CuZr2相中会富集杂质元素Fe。合金经过550℃,25MPa超临界水条件深度腐蚀后,伴随着合金基体发生的H致β相变,CuZr2第二相也发生了相消溶、扩散及凝聚长大过程。在腐蚀生成的氧化膜中,合金元素Cu以非晶氧化物的形式存在于氧化锆的晶界。
Varsinais-Suomessa Bio- ja lääkealan yrityksissä toimii noin 2400 henkilöä. Yritysten \nyhteenlaskettu liikevaihto on noin 500 miljoonaa euroa, josta suurin osa muodostuu lääkkeiden \nja in vitro –diagnostisten tuotteiden valmistuksesta. Alan toiminta on hyvin kansainvälistä ja \npienistä kotimarkkinoista johtuen erit…
The thesis shows strategies how to learn from Mother Nature to make functional materials. Firstly, inspired by lotus leaf and water strider, superhydrophobic and superoleophobic surfaces are prepared from nanofibrillated cellulose aerogels. Furthermore, we explore potential applications of the superhydrophobic and sup…
The vibronic properties of semiconductor structures based on nonmetal naphthalocyanine mol� ecules are studied using IR and Raman spectroscopy methods. New absorption lines in the transmission spec� tra of such materials are detected and identified. Three transmission lines are observed in the range 2830- 3028 cm -1 ,…
Tese de Doutoramento. Engenharia Biomedica. Area de Especializacao de Biomateriais. Faculdade de Engenharia. Universidade do Porto. 2012
During several years The Peoples Republic of China went through a transformation into one of the leaders in high-tech development sphere. This scientific paper reviews the technological basis of the Chinese nuclear industry, lists the reactor technologies created through own efforts and the reactors introduces from ab…
为提高废弃甘蔗渣对重金属离子Cd2＋和Pb2＋的吸附能力,文章采用简单的方法制备了乙二胺四乙酸二酐（EDTAD）修饰的甘蔗渣。经FTIR分析,有大量的羰基修饰在了甘蔗渣的表面,为其吸附重金属离子提供了更多的活性位点。实验结果表明：经过修饰后的甘蔗渣对Cd2＋和Pb2＋的吸附量分别为46.46 mg/g、119.36 mg/g,是未修饰的3.69和12.31倍,且均能在20 min内达到最大吸附量并保持平衡,其吸附符合Langmuir等温吸附模型,且吸附过程遵循二级动力学模型。在pH 4~7范围内,修饰SCB对Cd2＋和Pb2＋具有较高的吸附能力。除此之外,在Cd2＋、Pb2＋、Cu2＋和Zn2＋共存的情况下,修饰SCB对Pb2＋仍…
选用液晶聚合物（LCP）对聚丙烯（PP）进行熔融共混,采用马来酸酐接枝聚丙烯（PP-g-MAH）对PP/LCP复合材料进行改性,采用热分析（DSC）和电子扫描电镜（SEM）对复合材料结构与性能进行研究。研究发现：添加少量液晶对PP具有一定的增强和增韧作用,与纯PP相比,PP/LCP（100/10）拉伸强度和冲击强度分别提高了5.4%和21.3%;在PP-g-MAH接枝改性后,PP/LCP/PP-g-MAH（100/10/3）比PP/LCP（100/10）拉伸强度提高了18.5%,冲击强度提高了33.2%。增加LCP含量,提高了PP/LCP共混物中PP组分熔融温度,但是结晶度降低;加入少量的PP-g-MAH,提高了PP/LCP/PP…
The dynamic mechanical properties of egg albumin and acetate rayon fibers have been discussed in terms of the theories of Tobolsky, Dunell and Andrews and Kuhn, Kunzle and Preissman. The dependence of these properties on relative humidity has been determined for a series of relative humidities from 27 to 82% RH. The v…
Recently, there have been on-going efforts to replace the Nafion (117) based ionic polymer metal composites (IPMC) actuator due to high cost of materials, less environmentally friendly nature and its back-relaxation under DC voltages. This paper proposes IPMC using Polyvinylidene fluoride (PVDF)/Polyvinyl pyrrolidone…
Silver nanospheres (Ag NSs) were introduced through a solution casting process to improve the performance of Poly[2,1,3-benzothiadiazole-4,7-diyl[4,4-bis(2-ethylhexyl)-4H-cyclopenta[2,1-b:3,4-b']dithiophene- 2,6-diyl]] (PCPDTBT) and [6,6]-phenyl C71 butyric acid methyl ester (PC70BM) bulk-heterojunction organic solar…
A study of the chemical and physical properties of Pineview, Vanderhoof and Nulki soil associations in the Central Interior of British Columbia was related to field observations. The results of the chemical data on the whole soil as well as the colloid fraction (.002) show varying degrees of podsolic development due t…
在NH3-NH4Cl缓冲溶液介质中,痕量Cu2＋对H2O2氧化考马斯亮蓝G250（CBBG）褪色反应的显著催化作用,建立了催化动力学光度法测定痕量铜的新方法。线性范围为0.02～0.20μg/mL,检出限为1.34×10-9g/mL。考察了20多种共存离子的影响。方法用于发样中痕量铜离子的测定,相对标准偏差小于3.4%,加标回收率为97%～105%。
研究了水蒸气对Fe-13％Cr-5％Ni合金在800℃下的氧化膜形貌的影响。用光学显微镜、扫描电子显微镜观察了氧化膜的截面及表面形貌，用XRD分析了氧化膜的物相组成。结果表明，干燥气氛下形成的氧化膜表面呈鳞片状，截面为单层结构，其物相组成为Fe2O3和Cr2O3；富含水蒸气的气氛下形成的氧化膜表面则有大量粗糙的凸起，截面为复合层结构，外层有大量孔洞，其物相组成为Fe2O2，内层较为致密，其物相组成为FeCr2O2。
在混合酸（钠）（有机磺酸（钠）＋盐酸）反应体系中，使用快速氧化法合成导电性聚苯胺，并研究混合酸（钠）的浓度对聚苯胺电导率及分散性的影响。实验表明，快速氧化法可以制备高导电性聚苯胺，有机磺酸的掺杂明显改善了聚苯胺的分散性，得到高导电性、高分散性的聚苯胺。
按n（SiO2）∶n（Na2O）∶n（Al2O3）∶n（H2O）=1∶1.5∶0.5∶100加料,在90 ℃下水热晶化3 h合成NaA 微孔分子筛,再按n（SiO2）∶n（NaOH）∶n（CTAB）∶n（H2O）=1∶0.3∶0.3∶90依次添加到NaA微孔分子筛中,于110 ℃下水热晶化24 h合成NaA／MCM-41微介复合分子筛,并采用XRD、SEM （EDS）和TEM等方法对其进行了表征。吸附阳离子红X-5GN模拟染料废水结果表明：在50 mL ρ（阳离子红X-5GN）=20 mg／L的水溶液中,NaA／MCM-41微介复合分子筛的投加量为0.6 g／L、pH=6、振荡时间为60 min时,脱色率可达到96.4％,比NaA…
采用超声波辅助法合成了Ⅳ-（2-羟乙基）-3-甲基咪唑四氟硼酸盐（[C20Hmim]BF4），产率达57．69％，并建立了[C20Hmim]BF。和无机盐形成的离子液体双水相体系。结果表明，盐的种类和浓度对体系的形成影响很大，（NH4）2SO4能与[C20Hmim]BF。水溶液形成双水相体系。在2mL[C20Hmim]BF。与3mL水的混合溶液中加入JnAo．7500g（NH4）2SO4后，能形成稳定的双水相且相比达0．923，接近于1；在pH=6-9时，溶液酸度对体系相比的影响较小；在不同温度下体系的热稳定性较好，受温度影响不大；离子液体可再利用。
The article discusses the properties of currently used titanium alloys. We studied the properties of nanostructured titanium and potential acute and chronic toxicity in experimental animals. A histological study of osteointegration processes was undertaken. The obtained data indicate the possibility of nanotitanium em…
我公司Φ3.2m×13m开路磨于2006年8月投入生产,磨机主电动机装配功率1 600kW,主减速器JDX100-ZP,磨机装载量（含球）190t,设计能力65t/h。2006~2009年底,设备运行正常,主机功率1 500kW。