Gas separation using adsorbent activated carbonized polyarylamides
    2.
    发明授权
    Gas separation using adsorbent activated carbonized polyarylamides 失效
    使用吸附剂进行气体分离活性炭化聚芳酰胺

    公开(公告)号:US5389350A

    公开(公告)日:1995-02-14

    申请号:US867686

    申请日:1992-07-09

    CPC分类号: D01F9/30

    摘要: Novel polyarylamide derived activated carbon materials are provided by a process comprising the carbonization of polyarylamide fibre at a temperature in excess or 400.degree. C. followed by activation at elevated temperature. The novel materials have the ability to adsorb relatively large quantities or carbon dioxide compared to other activated carbonized polymer materials, Preferably the carbonization and activation steps are carried out by raising the temperature of the materials to between 840.degree. C. and 880.degree. C. in carbonizing/activating atmospheres respectively.

    摘要翻译: PCT No.PCT / GB90 / 02008 Sec。 371日期:1992年7月9日 102(e)日期1992年7月9日PCT 1990年12月21日PCT PCT。 WO91 / 10000 PCT公开号 日期:1991年7月11日。新型聚芳酰胺衍生的活性炭材料通过包括聚芳基酰胺纤维在过量或400℃的温度下碳化的方法提供,随后在升高的温度下活化。 与其它活性碳化聚合物材料相比,新型材料具有吸附相对大量或二氧化碳的能力。优选地,碳化和活化步骤通过将材料的温度升高至840℃至880℃之间来进行 碳化/活化气氛。

    Internal chemical modification of carbon fibers to yield a product of
reduced electrical conductivity
    4.
    发明授权
    Internal chemical modification of carbon fibers to yield a product of reduced electrical conductivity 失效
    碳纤维的内部化学改性,产生导电性降低的产品

    公开(公告)号:US4073869A

    公开(公告)日:1978-02-14

    申请号:US584098

    申请日:1975-06-05

    申请人: Ilmar L. Kalnin

    发明人: Ilmar L. Kalnin

    摘要: The internal structure of carbon fibers (as defined) is modified to yield a fibrous product having a bound oxygen content of about 3 to 30 percent by weight which exhibits substantially different bulk properties than that of the starting material. The carbon fiber precursor is contacted with a strong acid medium comprising nitric acid and optionally sulfuric acid and water (as defined) under conditions found capable of producing the desired internal chemical modification. In a preferred embodiment of the process the strong acid medium is formed by a combination (as defined) of fuming nitric acid and fuming sulfuric acid. The fibrous product exhibits, inter alia, reduced electrical and thermal conductivities, and particularly is suited for use as an ablative reinforcing medium.

    摘要翻译: 碳纤维(如所定义)的内部结构被改性以产生具有约3-30重量%的结合氧含量的纤维产品,其表现出与起始材料基本上不同的体积性质。 在能够产生所需的内部化学改性的条件下,碳纤维前体与包含硝酸和任选的硫酸和水(如定义)的强酸介质接触。 在该方法的优选实施方案中,强酸介质通过发烟硝酸和发烟硫酸的组合(如定义)形成。 纤维制品特别表现出降低的电导率和热导率,特别适合用作烧蚀强化介质。

    Method of producing carbon fibers
    5.
    发明授权
    Method of producing carbon fibers 失效
    生产碳纤维的方法

    公开(公告)号:US3639953A

    公开(公告)日:1972-02-08

    申请号:US3639953D

    申请日:1970-08-03

    摘要: Nonflammable fibers are produced by subjecting a composite fiber comprising a pitch and a synthetic organic polymer bonded uniformly along the longitudinal direction of the fiber to an oxidation treatment to render it infusible and then to a set treatment in air or gaseous nitrogen at a temperature of 200* to 500* C. for at least 2 hours. The nonflammable fiber is converted to carbon fiber by heating to a temperature higher than 800* C. in gaseous nitrogen. Suitable pitches include petroleum asphalt, coal tar pitch, and pitch obtained by baking polyvinyl chloride. Suitable synthetic organic polymers include polyamides, polyesters, polyolefins, polyvinyl chloride, polyvinylidene chloride, polyurethane, epoxy resins, and phenol resins.

    摘要翻译: 不可燃纤维是通过将包含沥青和合成有机聚合物的复合纤维沿着纤维的纵向方向均匀地进行氧化处理而制成的,以使其不熔化,然后在空气或气态氮气中在200℃的温度下进行固化处理 至500℃至少2小时。 通过在气态氮中加热至高于800℃的温度将不燃纤维转化为碳纤维。 合适的间距包括石油沥青,煤焦油沥青和通过烘烤聚氯乙烯获得的沥青。 合适的合成有机聚合物包括聚酰胺,聚酯,聚烯烃,聚氯乙烯,聚偏二氯乙烯,聚氨酯,环氧树脂和酚醛树脂。