纳米吸附材料因比表面积大、吸附能力强等优点，在重金属离子的吸附领域得到广泛的关注。但纳米吸附材料大多存在对重金属离子吸附和交换过程不可控及不可逆等问题，极大地限制其应用价值。另一方面，生物基废弃物甘蔗渣的利用主要还是焚烧，不仅低效低值，而且污染环境。本项目拟利用甘蔗渣等纤维为原料制备纳米纤维素，之后将纳米纤维素磁性功能化。然后采用自由基聚合反应将磁性纳米纤维素与N-异丙基丙烯酰胺和丙烯酸单体反应，创新性的构建出对温度和pH具有双响应性的半互穿网络结构的纳米纤维素-N-异丙基丙烯酰胺-丙烯酸磁性复合材料；并系统表征该纳米复合材料的半互穿网络结构和温度-pH双响应性的内在关系；开展纳米复合材料在单一组分和多组分系统下对重金属离子吸附动力学和吸附性能研究；阐明纳米复合材料的半互穿网络结构和温度-pH双响应性对重金属离子的智能化吸附机理，以期解决当前纳米吸附材料对重金属离子吸附和交换过程不可控及不可逆的现状。

Nano-adsorbents have aroused tremendous interest in the removal of heavy metal ions due to their large specific surface area, highly adsorption capacity and other advantages. However, there are still some deficiencies of utilizing conventional Nano-adsorbents. The adsorption and exchange of heavy metal ions are uncontrollable and irreversible, resulting in the limitation application of the Nano-adsorbents. In addition, the utilization of bagasse is mainly incineration, which is not only inefficient and low value, but also causes environmental pollution. Herein, bagasse and other fibers are applied as raw materials to prepare nanocellulose, followed by magnetically functionalization..The synthesis of the Dual-responsive Semi- Interpenetrating Networks (IPN) nanofibrils composites were then carried out by a free radical copolymerization of acrylic acid (AA) (pH-sensitive chain segments) and N-isopropylacrylamide (NIPAM) (temperature-sensitive chain segments) in the presence of magnetic cellulose nanofibrils. The intrinsic relationship between the structure and the temperature -pH dual responsiveness of the composite was systematically characterized, the adsorption mechanism of the heavy metal ions using as-prepared composite is systematically characterized using various kinetics models in single and binary systems. The relationship between the temperature-pH responsiveness, the structure of the SemiIPN and the adsorption capacity of the heavy metal ions is elucidated to solve the current situation of uncontrollable and irreversible adsorption and exchange of the heavy metal ions using nano-adsorbents.