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Irradiation of poly(L-lactide) biopolymer reinforced with functionalized MWCNTs

机译：聚（L-丙交酯）生物聚合物用官能化MWCNT的照射

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摘要

Radiation sterilization processes by high energy radiation are successfully utilized for modification and sterilization of sensitive biodegradable and biocompatible polymer composites. The effect of g-irradiation on mechanical and thermal properties of poly (L-lactide) (PLLA) biodegradable polymer reinforced with PLLA grafted from multiwalled carbon nanotubes (MWCNT-g-PLLA)s was characterized. For this purpose, the PLLA chains covalently grafted from the sidewall of aminated MWCNTs. Then, the MWCNT-g-PLLAs/PLLA composite films are prepared by solution casting using chloroform as solvent. The prepared composites were g-irradiated and characterized by differential scanning calorimeter (DSC), SEM and tensile test instruments. It is found that the g-irradiation increases the tensile modulus and tensile strength, while decreases the elongation at break. The melting point of composites decreases by irradiation, while the melting enthalpy increases. Additionally, It is found that if the g-irradiation of composites increases to higher than 50 kGy, the rigidity and brittleness of composites, that have more concentrations of functionalized MWCNTs, increase gradually.
机译：通过高能量辐射的辐射灭菌方法被成功用于改性和灭菌的敏感性可生物降解和生物相容性聚合物复合材料。特征在于用从多壁碳纳米管（MWCNT-G-PLLA）的PLLA增强的聚（L-丙交酯）（PLLA）生物降解聚合物的聚（L-丙交酯）（PLLA）生物降解聚合物的机械和热性能的影响。为此目的，PLLA链从胺化MWCNT的侧壁共价接枝。然后，MWCNT-G-PLLAS / PLLA复合膜通过使用氯仿作为溶剂溶液浇铸制备。通过差示扫描量热计（DSC），SEM和拉伸试验仪器进行制备的复合材料。发现G辐射增加拉伸模量和拉伸强度，同时降低断裂的伸长率。复合材料的熔点通过辐射减少，而熔化焓增加。另外，如果复合材料的G辐射增加至高于50kgy，复合材料的刚性和脆性，具有更多浓度的官能化MWCNT，则逐渐增加。

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  • 来源
    《RSC Advances》 |2015年第68期|共6页
  • 作者

    Chakoli Ali Nabipour; He Jinmei; Chayjan Maryam Amirian; Huang Yudong; Zhang Baode;

  • 作者单位

    NSTRI Nucl Safety &

    Radiol Protect Res Dept Tehran Iran;

    Harbin Inst Technol Sch Chem Engn &

    Technol State Key Lab Urban Water Resource &

    Environm Harbin 150001 Peoples R China;

    Teachers Univ Ferdosi Ctr Karaj Iran;

    Harbin Inst Technol Sch Chem Engn &

    Technol State Key Lab Urban Water Resource &

    Environm Harbin 150001 Peoples R China;

    Liaoning Shihua Univ Sch Mech Engn Fushun 113001 Peoples R China;

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  • 正文语种 eng
  • 中图分类 化学;
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