高级检索+

木质纤维吸油气凝胶的制备及性能

Synthesis and Characterization of Lignocellulose Oil-absorbing Aerogels

  • 摘要: 大豆秸秆粉末经乙二胺(EDA)润胀消晶后溶解在LiCl/DMSO中,与甲基丙烯酸甲酯(MMA)及丙烯酸丁酯(BA)在交联剂N,N-亚甲基双丙烯酰胺(MBA)和引发剂偶氮二异丁氰(AIBN)作用下反应,制得具有半互穿聚合网络木质纤维疏水吸油气凝胶,并利用FT-IR、SEM、流变仪和光学接触角等手段表征凝胶相关性能。研究发现:制得的气凝胶同时含有单体聚合交联网络和木质纤维链段,有明显的多孔三维网络结构,且具有良好的疏水吸油性能。可通过调节木质纤维与单体比例调控凝胶网络结构和疏水吸油性能。当木质纤维与单体比例为1:4时,气凝胶结构最为疏松,孔隙增大,吸油性能最佳,其吸油量可达10.61 g/g(二甲苯)和7.41 g/g(食用油)。

     

    Abstract: Soybean straw powder was swelled by ethanediamine(EDA) and dissolved in LiCl/DMSO solution to get a homogenies solution. In the homogenies solution, a novel hydrophobic oil-absorbing aerogel was fabricated from lignocellulose and monomers including methyl methacrylate (MMA) and butyl acrylate(BA) by the method of semi-interpenetrating polymer network (SIPN) with using N, N-methylene diacrylamide (MBA) as the crosslinker and azobisisobutyronitrile (AIBN) as the initiator. The chemical linkage, microstructure, rheology, hydrophobic and oil-absorption were determined by FT-IR, SEM, rheology tester, contact angle tester and so on. It could be concluded that the poly-(MMA-BA) matrix and lignocellulose chains were intertwined with each other in the aerogel and the aerogel had obvious porous three-dimensional network structure, good hydrophobicity and oil-absorption. The microstructure, hydrophobicity and oil-absorption could be regulated by adjusting the ratio of lignocellulose and the monomers. The lignocellulose aerogel obtained with the ratio of lignocellulose and monomers ratio of 1:4, had the loosest structure and relatively larger pores, and its absorption capacity on xylene and edible oil could reach up to 10.61 g/g and 7.41 g/g respectively, and these data were higher than those of others.

     

/

返回文章
返回