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    • 41. 发明授权
    • Colloidal silica containing silica secondary particles having bent structure and/or branched structure, and method for producing same
    • 含有具有弯曲结构和/或支化结构的二氧化硅二次粒子的胶体二氧化硅及其制造方法
    • US08529787B2
    • 2013-09-10
    • US12998096
    • 2009-09-01
    • Kazuaki HiguchiHideki Otsuki
    • Kazuaki HiguchiHideki Otsuki
    • C09K13/00
    • C09K3/1409C01B33/14C01B33/18C01B2202/02C01B2202/36
    • This invention provides a dense, high-purity colloidal silica containing silica secondary particles having a branched and/or bent structure, and a production method thereof. Specifically, this invention provides a method for producing a colloidal silica, comprising the steps of 1) preparing a mother liquid containing an alkali catalyst and water, and having a pH of 9 to 12; and 2) adding a hydrolysis liquid obtained by hydrolysis of an alkyl silicate to the mother liquid, wherein the step of adding the hydrolysis liquid to the mother liquid sequentially comprises A) step 1 of adding the hydrolysis liquid until the pH of the resulting liquid mixture becomes less than 7; B) step 2 of adding an aqueous alkali solution until the pH of the liquid mixture becomes 7 or more; and C) step 3 of adding the hydrolysis liquid while maintaining the pH of the liquid mixture at 7 or more, and a colloidal silica containing silica secondary particles having a branched and/or bent structure, obtained by this method.
    • 本发明提供一种含有分支和/或弯曲结构的二氧化硅二次颗粒的致密的高纯度胶体二氧化硅及其制备方法。 具体而言,本发明提供一种胶体二氧化硅的制造方法,其特征在于,包括以下步骤:1)制备含有碱催化剂和水的母液,pH为9〜12; 和2)将通过水解硅酸烷基酯获得的水解液加入到母液中,其中依次将水解液加到母液中的步骤包括:A)加入水解液直到所得液体混合物的pH 变得小于7; B)添加碱性水溶液直至液体混合物的pH变为7以上为止的步骤2; 和C)在将液体混合物的pH保持在7以上的同时添加水解液的步骤3和通过该方法获得的含有分支和/或弯曲结构的二氧化硅二次粒子的胶体二氧化硅。
    • 43. 发明授权
    • Single-walled carbon nanotube catalysts and method for preparing same
    • 单壁碳纳米管催化剂及其制备方法
    • US08496904B2
    • 2013-07-30
    • US11602136
    • 2006-11-20
    • Jun MaDavid Moy
    • Jun MaDavid Moy
    • D01F9/12C01B13/14
    • D01F9/127B01J21/005B01J23/002B01J23/005B01J23/78B01J37/0236B01J37/031B01J37/08B01J37/18B01J2523/00B82Y30/00B82Y40/00C01B32/162C01B2202/02B01J2523/22B01J2523/842B01J2523/845B01J2523/41B01J2523/31
    • An activated catalyst capable of selectively growing single-walled carbon nanotubes when reacted with carbonaceous gas is provided. The activated catalyst is formed by reducing a catalyst that comprises a complex oxide. The complex oxide may be of formula Ax-wFwBy-vGvOz wherein x/y≦2; z/y≦4; 0≦w≦0.3x; 0≦v≦0.3y; A is a Group VIII element; F is an element that is different from A but has, in said composition, the same valence state as A; B is an element different from A and F, and is an element whose simple oxide, in which B is at the same valence state as in the complex oxide, is not reducible in the presence of hydrogen gas at a temperature less than about 900° C.; G is an element different from A, B and F, and is an element whose simple oxide, in which G is at the same valence state as in the complex oxide, is not reducible in the presence of hydrogen gas at a temperature less than about 900° C.; and O is oxygen. The complex oxide is reduced at a temperature less that 950° C. Methods of making, uses for and carbon fibril-containing product made with these activated catalysts are also provided.
    • 提供能够与碳质气体反应时能够选择性地生长单壁碳纳米管的活化催化剂。 通过还原包含复合氧化物的催化剂形成活化的催化剂。 复合氧化物可以具有式Ax-wFwBy-vGvOz,其中x / y @ 2; z / y @ 4; 0 @ w @ 0.3x; 0 @ v @ 0.3y; A是VIII族元素; F是与A不同的元素,在所述组合物中具有与A相同的价态; B是与A和F不同的元素,并且是其中B与复合氧化物处于相同价态的简单氧化物在氢气存在下在小于约900°的温度下不可还原的元素 C。; G是不同于A,B和F的元素,并且是其中G与复合氧化物处于相同价态的简单氧化物的元素在氢气存在下在小于约 900°C。 而O是氧。 复合氧化物在低于950℃的温度下还原。还提供了用这些活化的催化剂制备,用于含有原纤维的产物的方法。
    • 44. 发明授权
    • Isolation of single-walled carbon nanotubes from double and multi-walled carbon nanotubes
    • 从双层和多壁碳纳米管分离单壁碳纳米管
    • US08465647B2
    • 2013-06-18
    • US12636426
    • 2009-12-11
    • Ageeth A. BolGeorge S. Tulevski
    • Ageeth A. BolGeorge S. Tulevski
    • B01D11/00B01D17/038C01B31/02
    • B01D21/262B01D17/0217B82Y30/00B82Y40/00C01B32/17C01B32/172C01B2202/02Y10S977/845
    • A method and system are disclosed for separating single-walled carbon nanotubes from double and multi-walled carbon nanotubes by using the difference in the buoyant density of Single-Walled versus Multi-Walled carbon nanotubes. In one embodiment, the method comprises providing a vessel with first and second solutions. The first solution comprises a quantity of carbon nanotubes, including single-walled carbon nanotubes and double and multi-walled carbon nanotubes. The single walled nanotubes have a first density, the double and multi-walled nanotubes having a second density. The second solution in the vessel has a third density between said first and second densities. The vessel is centrifuged to form first and second layers in the vessel, with the second solution between said first and second layers. The single-walled carbon nanotubes are predominantly in the first layer, and the second and multi-walled carbon nanotubes are predominantly in the second layer.
    • 公开了通过使用单壁碳纳米管与多壁碳纳米管的浮力密度的差异来从双层和多壁碳纳米管分离单壁碳纳米管的方法和系统。 在一个实施例中,该方法包括向船舶提供第一和第二解决方案。 第一种解决方案包括一定量的碳纳米管,包括单壁碳纳米管和双层和多壁碳纳米管。 单壁纳米管具有第一密度,双壁和多壁纳米管具有第二密度。 容器中的第二溶液在所述第一和第二密度之间具有第三密度。 将容器离心以在容器中形成第一和第二层,第二溶液在所述第一和第二层之间。 单壁碳纳米管主要位于第一层中,第二层和多壁碳纳米管主要位于第二层。
    • 45. 发明申请
    • MODIFIED CARBON NANOTUBES AND THEIR COMPATIBILITY
    • 改性碳纳米管及其相容性
    • US20130137822A1
    • 2013-05-30
    • US13702106
    • 2011-06-10
    • Jingwen GuanRobin FraserBenoit Simard
    • Jingwen GuanRobin FraserBenoit Simard
    • C08F226/02
    • C08F226/02B82Y30/00B82Y40/00C01B32/174C01B2202/02C01B2202/06C01P2002/88C01P2004/03C01P2004/04C09C1/44Y10S977/746
    • Modified carbon nanotubes are provided having carbon nanotube core covalently bound through C—C bonds to a polymer shell surrounding the carbon nanotube core. The polymer shell is a polymer having functional groups pointing outwardly from the shell. The functional groups are compatible with or able to covalently connect to another polymer. Such modified carbon nanotubes are more readily dispersed in a homogeneous manner in another polymer and may be used as a reinforcing filler in a polymer matrix. The modified carbon nanotubes with a core-shell structure in which the core has a substantially unidirectional orientation within the shell are produced by reacting neutral carbon nanotubes with 4-vinylaniline through a diazonium reaction in presence of one or more types of multifunctional monomers carrying a vinyl moiety and one or more functional groups for compatibilization with or connection to another polymer. The reaction is conducted at an elevated temperature without isolation of intermediates and without addition of any extra initiator or catalyst to form a polymer shell in situ around the carbon nanotube. The polymer shell is covalently bound to CNT sidewall through C—C bonds and has functional groups outwardly pointing from the shell for compatibilization with or connection to another polymer.
    • 提供了具有通过C-C键共价键合到碳纳米管芯周围的聚合物壳的碳纳米管芯的改性碳纳米管。 聚合物壳是具有从壳向外指向的官能团的聚合物。 官能团与另一种聚合物相容或能共价连接。 这种改性碳纳米管更容易以均匀的方式分散在另一种聚合物中,并且可以用作聚合物基质中的增强填料。 具有核 - 壳结构的改性碳纳米管通过在一种或多种携带乙烯基的多官能单体的存在下,通过重氮化反应使中性碳纳米管与4-乙烯基苯胺反应,从而制备芯在壳内具有基本上单向取向 部分和一个或多个与另一种聚合物相容或连接的官能团。 反应在升高的温度下进行,而不分离中间体,并且不加入任何额外的引发剂或催化剂以在碳纳米管周围原位形成聚合物壳。 聚合物壳通过C-C键共价结合到CNT侧壁上,并且具有从壳体向外指向的官能团,用于与另一种聚合物相容或连接。