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Various surface functionalizations of ultra-high-molecular-weight polyethylene based on fluorine-activation behavior

机译：基于氟活化行为的超高分子量聚乙烯的各种表面官能化

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摘要

Ultra-high-molecular-weight-polyethylene (UHMWPE) is an excellent biological material, but covalently introducing a variety of functional groups on its surface is very difficult owing to its inherently inert structure. In this study, the surface functionalization of UHMWPE based on fluorine-activation and subsequent derivatization reactions is reported, and offers a simple and convenient pathway to the incorporation of useful functional groups and patterned surface functionality. A large number of carboxyl groups, -C-F-x and C=C bonds are covalently bonded to the macromolecular chain structure through a fluorine-activated process in the presence of oxygen, greatly increasing the surface polarity and wettability. Its surface energy is increased from 34.5 mN m (1) to 57.5 mN m (1), and the polar component arises from 4.0 to 23.8 mN m(-1). In contrast, only stable C-F forms when treated with only fluorine (no oxygen), producing a hydrophobic Teflon-like surface structure and poor wettability. Moreover, UHMWPE with carboxyl groups and double bonds, used as precursor, were further covalently functionalized through subsequent derivatization reactions with fluorine, bromine and amine-terminated molecules, by which the carbon-bromine bond and amino groups were successfully grafted onto a UHWMPE surface. The results demonstrate that the fluorine-activated strategy developed in this work is an effective means to improve the surface hydrophilicity and derivatization reaction capacity of UHMWPE.
机译：超高分子量 - 聚乙烯（UHMWPE）是优异的生物材料，但由于其固有的惰性结构，因此在其表面上共价引入各种官能团。在该研究中，报道了基于氟激活和随后的衍生化反应的UHMWPE的表面官能化，并提供了一种简单方便的途径，以掺入有用的官能团和图案化表面官能度。大量羧基，-C-F-X和C = C键通过氟活化的方法共价键合到大分子链结构中，在氧气存在下，大大增加了表面极性和润湿性。其表面能量从34.5mN m（1）升至57.5mN m（1）增加，极性分量由4.0至23.8mN m（-1）产生。相反，仅用氟（不氧）处理时，只有稳定的C-F形式，产生疏水性的Teflon样表面结构和润湿性差。此外，通过与氟，溴和胺封端的分子的随后的衍生化反应进一步共价官能化，碳 - 溴键和氨基成功接枝到UHWMPE表面上的随后的衍生反应和用作前体的羧基和双键的UHMWPE进一步共价官能化。结果表明，本作作品中开发的氟活化策略是改善UHMWPE的表面亲水性和衍生化反应能力的有效方法。

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  • 来源
    《RSC Advances》 |2015年第96期|共9页
  • 作者

    Li Baoyin; Zhang Jiahui; Ren Mengmeng; Wu Peng; Liu Yang; Chen Teng; Cheng Zheng; Wang Xu; Liu Xiangyang;

  • 作者单位

    Sichuan Univ Coll Polymer Sci &

    Engn State Key Lab Polymer Mat &

    Engn Chengdu 610065 Peoples R China;

    Sichuan Univ Coll Polymer Sci &

    Engn State Key Lab Polymer Mat &

    Engn Chengdu 610065 Peoples R China;

    Sichuan Univ Coll Polymer Sci &

    Engn State Key Lab Polymer Mat &

    Engn Chengdu 610065 Peoples R China;

    Sichuan Univ Coll Polymer Sci &

    Engn State Key Lab Polymer Mat &

    Engn Chengdu 610065 Peoples R China;

    Sichuan Univ Coll Polymer Sci &

    Engn State Key Lab Polymer Mat &

    Engn Chengdu 610065 Peoples R China;

    Sichuan Univ Coll Polymer Sci &

    Engn State Key Lab Polymer Mat &

    Engn Chengdu 610065 Peoples R China;

    Sichuan Univ Coll Polymer Sci &

    Engn State Key Lab Polymer Mat &

    Engn Chengdu 610065 Peoples R China;

    Sichuan Univ Coll Polymer Sci &

    Engn State Key Lab Polymer Mat &

    Engn Chengdu 610065 Peoples R China;

    Sichuan Univ Coll Polymer Sci &

    Engn State Key Lab Polymer Mat &

    Engn Chengdu 610065 Peoples R China;

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