基于植酸改性的羽毛吸附材料的制备及其性能

Preparation and Properties of Feather Adsorbent Material Based on Phytic Acid Modification

以含环氧基的羽毛接枝共聚物(Feather-g-PGMA)为原料、植酸(PA)为改性剂,利用环氧基的开环反应,将PA中的磷酸根基团引入到Feather-g-PGMA表面,制得含有高密度磷酸根的羽毛吸附材料。采用红外光谱(FT-IR)、热重分析(TG)和X衍射图谱(XRD)对改性前后的羽毛进行表征。重点研究了羽毛吸附材料的制备过程及其吸附量的主要影响因素。结果表明:PA成功改性了Feather-g-PGMA。当PA体积分数为25%、温度为70℃、时间为4h时,改性条件最佳。制备的羽毛吸附材料与Pb^(2+)之间可产生配位作用,对Pb^(2+)有强吸附力,吸附容量可达54.4mg/g。与羽毛相比,热稳定性下降;与Feather-g-PGMA相比,热稳定性增强。

Using feather graft copolymers containing epoxy groups （Feather-g-PGMA） as raw material,phytic acid （PA） as modified reagents,the feather adsorbent material with high density phosphate was obtained by the ring-opening reaction of epoxy groups.The modified feather were characterized by Fourier Transform Infrared spectroscopy （FT-IR）,Thermogravimetric analysis （TG） and X-ray diffraction （XRD）.The preparation process of feather adsorbent material was studied and the effects of concentration,temperature and time on the phytic acid modified Feather-g-PGMA were discussed.Results show that the Feather-g-PGMA can be successfully modified by PA.When the volume fraction of PA is 25%,temperature is 70 ℃ and time is 4h,the best conditions for modification are obtained.There is a strong coordination bond between Pb^2＋ and feather adsorbent material,leading to a strong adsorption ability of feather adsorbent material for Pb^2＋ at 54.4mg/g.Compared with feather,the thermal stability of feather adsorbent material is decreased.Compared with Feather-g-PGMA,the thermal stability is enhanced.