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纳米二氧化锆

纳米二氧化锆的相关文献在2000年到2022年内共计134篇,主要集中在化学工业、化学、一般工业技术 等领域,其中期刊论文63篇、会议论文6篇、专利文献816824篇;相关期刊48种,包括上饶师范学院学报、漳州职业技术学院学报、应用科技等; 相关会议5种,包括2012年中国船舶行业热加工技术交流会、2010年第九届中国国际纳米科技(西安)研讨会、中国颗粒学会第七届学术年会暨海峡两岸颗粒技术研讨会等;纳米二氧化锆的相关文献由307位作者贡献,包括刘力、周兴平、周新基等。

纳米二氧化锆—发文量

期刊论文>

论文:63 占比:0.01%

会议论文>

论文:6 占比:0.00%

专利文献>

论文:816824 占比:99.99%

总计:816893篇

纳米二氧化锆—发文趋势图

纳米二氧化锆

-研究学者

  • 刘力
  • 周兴平
  • 周新基
  • 周涛
  • 朱建军
  • 沈同德
  • 周迎春
  • 高丽娟
  • 何科林
  • 宋秀芹
  • 期刊论文
  • 会议论文
  • 专利文献

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    • 陶家粱; 赵晶; 王世杰; 崔剑征; 陈诗瑶
    • 摘要: 采用分子动力学模拟的方法建立了纳米二氧化锆增强丁腈橡胶(NBR)复合材料的分子模型,对比分析了外部填充、原位填充以及原位填充且经过偶联化处理三种形态的二氧化锆对NBR力学性能的增强效果,从原子层面探讨了定子橡胶力学性能的内在增强机制。结果表明,相比于纯NBR,三种形态二氧化锆的引入均显著改善了NBR的力学性能。原位填充纳米二氧化锆的表面羟基与NBR形成氢键型偶极相互作用,表面活性偶联剂双-(3-三乙氧基硅烷丙基)四硫化物的加入进一步提供了与橡胶基质之间的化学桥接,从而大大提升了NBR基质的力学性能。与纯NBR体系相比,原位填充且经过偶联化处理的二氧化锆增强NBR的力学性能表现最佳,复合体系的杨氏模量、体积模量和剪切模量均提升得最多。通过界面结合能、非键合能、均方位移和扩散系数的计算,验证了纳米二氧化锆的添加改善了定子橡胶力学性能的结论。
    • 钱钰; 李赛; 崔功军; 卞灿星
    • 摘要: 采用粉末冶金技术制备纳米级ZrO2陶瓷颗粒增强的CoCrW基复合材料,使用扫描电子显微镜、能谱仪、X射线衍射仪等分析复合材料的微观形貌和物相组成,通过球-盘式高温摩擦试验机,研究复合材料与Si3N4球配副在室温至1000°C下的摩擦学性能.结果 表明:ZrO2陶瓷颗粒显著提高了复合材料的硬度;复合材料摩擦因数随温度的升高先小幅下降然后升高,并随温度的进一步升高而减小,磨损率随着温度的升高先增大后下降并趋于稳定,其中含ZrO2复合材料在高温下具有更低的摩擦因数和磨损率,表明ZrO2陶瓷颗粒显著提高了复合材料的高温耐磨性能.在低温下ZrO2陶瓷颗粒增强CoCrW基复合材料表现出不同程度的磨粒磨损和塑性变形,高温下的磨损机制为氧化磨损.
    • 王敬飞; 张国华; 周国治
    • 摘要: 以ZrOCl2·8H2O为锆源,CO(NH2)2为沉淀剂,去离子水为溶剂,通过水热法合成单斜晶型的纳米ZrO2.讨论水热温度和水热时间对纳米二氧化锆晶粒尺寸的影响,并利用场发射扫描电镜(SEM)和XRD衍射仪表征手段,对产品形貌及物相进行了表征分析.实验结果表明,水热温度是影响ZrO2粉体晶化的主要因素,在140°C水热温度下,ZrOCl2·8H2O和CO(NH2)2反应生成Zr(OH)4胶体.随着水热温度升高到160°C,大部分的Zr(OH)4胶体分解生成ZrO2并结晶.当水热温度继续升高至180°C时,Zr(OH)4全部分解生成ZrO2.水热时间的增加并不改变ZrO2的晶型,且对ZrO2的晶粒尺寸影响不大,随着水热时间由3 h增加到18 h,其粒径分别为51.2、46.1、45.6 nm和54.3 nm,且样品具有良好的分散性.
    • 童吉灶; 张来军; 朱三连
    • 摘要: 以八水合氧氯化锆为锆源,精氨酸为表面修饰剂,氢氧化钠为矿化剂,采用水热法合成纳米二氧化锆,并利用透射电子显微镜(TEM)和X射线衍射仪(XRD)对产品进行了物相探查及结构形貌表征,讨论了煅烧温度和不同量Ti3+掺杂对纳米二氧化锆光催化性能的影响.实验结果表明,加入表面修饰剂和矿化剂、以适量的Ti3+掺杂并提高煅烧温度对制备纳米ZrO 2的晶体结构和形貌有较明显的影响,能有效改善纳米二氧化锆的光催化性能.
    • 谢娇娇
    • 摘要: Nanosized zirconium dioxide has wide and significant uses.Varieties of preparation and recent new application of nanosized zirconium dioxide are reviewed on the basis of new progress and developing trends at home land and abroad.Zirco-nium sol were prepared by using the gel-sol method with ZrOCl2 ·8H2O.By the various kinds of measurement tech-niques,determined a whole rational program of preparing zirconium sol,using the gel-sol method,while the ammonia was slowly driped to the buffer solution as precipitator.After suction filtration and rinse,defined quantity of electrolyte was add-ed to redistribute the filter mass,heat the miscible liquids at 75 °C with 5~12 h,the uniform and stable nano-scale zirconi-um sol was generated.The influence of different concentration of precursor solution,value of pH and buffer solution and other factors on stability and size of zirconium sol were investigated and analyzed.Via the TEM,nanoparticle size analyzer, TG-DSC graph of the study on the products,the results showed that the particle of the sol was appeared at columnar and umbellar.The size is about 12 to 15 nm.The zirconium sol was separated and existed stability at the range of pH value from 0.8 to 1.4.Then zirconium react with ekonol,ekonol shows an obvious improvement in anti-heat.%纳米二氧化锆有着广泛而重要的应用.基于新的方法和发展使得国内外二氧化锆各种各样的制备方法和新的应用随处可见.笔者采用ZrOCl2·8H2 O,使用溶胶-凝胶法制备了锆溶胶.通过溶胶-凝胶法,在室温条件下,缓慢将氨水与氧氯化锆溶液滴加至缓冲溶液中,制得前驱体沉淀,经抽滤洗涤后用硝酸重新分散滤饼,于75°C水浴加热5~12 h,制得澄清透明状纳米级锆质溶胶.系统分析了不同浓度的前躯体溶液、pH值以及缓冲溶液等因素对制备的锆溶胶粒径、稳定性的影响.结果表明,溶胶中粒子呈伞状、柱状,且分散均匀.溶胶粒子大小为12~15 nm.在pH值为0.8~1.4条件下,溶胶能长期稳定存在.再和聚苯酯反应,发现聚苯酯的耐热性明显提高.
    • 郝一男; 王喜明
    • 摘要: 采用沉淀法合成了纳米级二氧化锆,利用SEM、XRD技术,对纳米ZrO2进行微观形貌和粒径分析,探讨了吸附时间、吸附温度、pH值以及Pb2+初始浓度对吸附的影响,分析了吸附热力学性质和动力学特性,初步探讨了吸附机理.研究结果表明:在吸附温度为40°C,Pb2初始浓度为10 mg/L,pH为4.5时,吸附反应40 min后,最大吸附量为17.8 mg/g;纳米ZrO2对Pb2+吸附等温线符合Langmuir模型,其吸附动力学过程以准二级动力学方程拟合效果最好;温度在303 ~323 K时,纳米ZrO2吸附Pb2的吉布斯自由能△G°<0、焓变△H°<0、熵变AS”<0,表明纳米ZrO2对Pb2的吸附是一个自发放热过程.%Nano-zirconium dioxide was synthesized by using the precipitation method.The microtopography and grain size of nano-ZrO2 were analyzed by SEM and XRD.The adsorption process were carried out including initial Pb2+ concentration,adsorption time,pH and temperature.The thermodynamic and kinetic parameters were analyzed,and the mechanism was discussed preliminarily.The results showed that the maximum adsorption capacity of Pb2+ reached 17.8 mg/g under initial Pb2+ concentration,solution pH value,temperature,and adsorption time of 10 mg/L,4.5,40 °C,and 40 min,respectively.Modeling of adsorption kinetics indicated good agreement of experimental data with the pseudo-second-order kinetic model.Langmuir equilibrium isotherm fitted the experimental data reasonable well.The calculated values of the Gibbs free energy were as follows:AG° <0,enthalpy change AH° <0,entropy change AS° <0 when temperature were in range of 303 ~323 K,which revealed the adsorption was a spontaneous and exothermic process.
    • 张国正; 于海鹏; 刘一星
    • 摘要: Wood is widely used in construction and furniture fields as a sustainable and natural polymer material.How-ever,some drawbacks such as hygroscopic swelling and aging discoloration have limited its applications.It is necessary to improve the anti-wettability and aging resistance performance for the Populus ussuriensis wood during the utilization.In this study,the polyethyleneimine (PEI) and nano-zirconium dioxide (ZrO2) were alternately adsorbed on wood surface via layer-by-layer assemble method.Then,the assembled wood samples were treated with low-surfaceenergy 1H,1H,2H,2H-Perfluorodecyltrimethoxysilane (FAS),which formed composite (PEI/ZrO2)i/FAS coatings on wood surface.The results of XRD curves indicated that,compared with the untreated wood,the monoclinic crystal structure of ZrO2 emerged from the assembled wood samples.The diffraction peak intensity of ZrO2 on wood surface enhanced obviously with the increase of assembled layer number,and the crystal structure remained unchanged.Field emission scanning electron microscope (FE-SEM) images showed that (PEI/ZrO2)icoatings were well-distributed and consecutive on wood surface,and became denser with the increase of layer number.The results of water contact angle measurements demonstrated that the untreated wood was hydrophilic,however,the wood samples with (PEI/ZrO2) i/FAS coatings retained stable hydrophobic effect.The original contact angle reached 148,and the changes were not obvious afterwards.Then,wood samples alternately exposed under the UV irradiation and wet environment for artificial accelerated aging test.When the irradiation time reached 600 h,the total color change (△E*) of the untreated wood was calculated to be 35.36.Owing to the good ultraviolet absorption and reflection performance of ZrO2,△E* of the treated wood samples significantly decreased with the increase of assembled layer number.For the (PEI/ZrO2)20/FAS wood sample,△E* was 11.87,which was decreased by 66.4% compared with that of the untreated wood.Therefore,(PEI/ZrO2) i/FAS coatings were equably coated on wood surface through the layer-by-layer assemble method,and the assembled wood samples were possessed of great anti-wettability and aging resistance performance.%以大青杨木材为研究对象,为提高其抗润湿和耐老化性能,采用层层自组装技术,将聚乙烯亚胺(PEI)和纳米ZrO2交替吸附在木材表面,然后用全氟癸基三甲氧基硅烷(FAS)对组装后的木材进行修饰,在木材表面形成复合的功能薄膜.结果表明,在组装过程中,纳米ZrO2的单斜晶系晶体结构没有发生转变.(PEI/ZrO2)i膜层能均匀地负载在木材表面,随着层数的增加,膜层变得更加致密.接触角测试结果发现,与未处理材相比,组装后的木材试样经过FAS修饰后均具有较稳定的疏水效果,初始接触角最高可达148°.加速老化试验结果表明,未处理材的颜色变化△E*可达35.36,而处理后木材的△E*明显减小,降幅达到66.4%.因此,利用层层自组装技术,在木材表面吸附了(PEI/ZrO2) i/FAS膜层,可使木材具有良好的抗润湿及耐老化效果.
    • 谢娇娇
    • 摘要: 纳米尺寸的二氧化锆有着广泛而重要的应用.基于新的方法和发展使得国内外二氧化锆各种各样的制备方法和最近的应用随处可见.本文采用ZrOCl2·8H2O,使用溶胶-凝胶法制备锆溶胶.通过溶胶-凝胶法,在室温条件下,缓慢将氨水与氧氯化锆溶液滴加至缓冲溶液中,制得前驱体沉淀,经抽滤洗涤后用硝酸重新分散滤饼,于75°C水浴加热5~12h,制得澄清透明状纳米级锆质溶胶.系统分析了不同浓度的前躯体溶液、pH值以及缓冲溶液等因素对制备的锆溶胶粒径、稳定性的影响.结果表明,溶胶中粒子呈伞状、柱状,且分散均匀.溶胶粒子大小为12~ 15 nm.在pH值为0.8~ 1.4条件下,溶胶能长期稳定存在.再和聚苯酯反应,发现聚苯酯的耐热性明显提高.
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