文章摘要
聚丙烯酸钠/纳米纤维素晶体-g-聚丙烯酰胺复合高吸水性树脂的制备与表征
Preparation and Characterization of Sodium Polyacrylate/(Nanocrysatlline Cellulose)-g-Polyacrylamide Superabsorbent Composites
  
DOI:10.16865/j.cnki.1000-7555.2018.07.027
中文关键词: 聚丙烯酸钠  纳米纤维素晶体  复合高吸水性树脂  吸水性能
英文关键词: sodium polyacrylate  nanocrysatlline cellulose  superabsorbent composites  water absorption
基金项目:江苏省自然科学基金资助项目(BK20140967);江苏省大学生实践创新训练计划(201610298083Y)
作者单位
李本刚,范玉曼,张严丹,曹绪芝,罗振扬 南京林业大学 理学院,江苏 南京 210037 
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中文摘要:
      先用铈(Ⅳ)盐引发丙烯酰胺(AM)在纳米纤维素晶体(NCC)表面接枝聚合,接枝产物NCC-g-PAM 可稳定地分散在丙烯酸钠/丙烯酸混合单体水溶液中,然后以N,N-亚甲基双丙烯酰胺作交联剂通过原位光聚合制得聚丙烯酸钠(PAANa)/NCC-g-PAM 复合高吸水性树脂。用红外光谱、X射线衍射、元素分析等方法对NCC-g-PAM 进行了表征,通过红外光谱、扫描电镜、溶胀实验考察了NCC-g-PAM 的添加对高吸水性树脂结构、形貌和吸水性能的影响。结果表明,NCC-g-PAM 中NCC 的晶态结构未改变,聚丙烯酰胺(PAM)的含量为59.54%。PAANa/NCC-g-PAM 复合高吸水性树脂具有丰富的网孔结构,NCC-g-PAM 中的PAM 链与PAANa基体间形成了氢键。与PAANa高吸水性树脂相比,PAANa/NCC-g-PAM 复合高吸水性树脂的吸水倍率和吸水速率均有所增加,吸水倍率最高可达3000g/g,是PAANa的3.2倍,吸生理盐水倍率最高可达139g/g,是PAANa的2.5倍。
英文摘要:
      Acrylamide(AM) was grafted onto the surface of nanocrystalline cellulose(NCC) by initiating of cerium(Ⅳ) salt to give NCC-g-PAM, which can disperse stably in the solution of mixed sodium acrylate(AANa)/acrylic acid(AA) monomers. NCC-g-PAM was further in situ photopolymerized with AANa/AA monomers to obtain PAANa/NCC-g-PAM superabsorbent composites with N,N’-methylenebisacrylamide as crosslinker. NCC-g-PAM was characterized by IR, XRD and elemental analysis. The structure, morphology and water absorption of PAANa/NCC-g-PAM superabsorbent composites were investigated by IR, SEM and swelling test. The results show that the crystalline structure of NCC in NCC-g-PAM remains, and the PAM content in NCC-g-PAM is 59.54%. The PAANa/NCC-g-PAM superabsorbent composites have rich mesh structure,and hydrogen bonds are formed between the PAM segments in NCC-g-PAM and the PAANa matrix. Water absorption capacity and water absorption rate of the PAANa/NCC-g-PAM superabsorbent composites are higher than of the PAANa superabsorbent. The highest water absorption capacity of PAANa/NCC-g-PAM is 3000 g/g, which is 3.2 times of PAANa. The highest normal saline absorption capacity of PAANa/NCC-g-PAM is 139 g/g, which is 2.5 times of PAANa.
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