| 何星桦,栾云浩,李宇航,刘婉嫕,王聪,曹慧,刘鹏涛,刘忠.磁性疏水性纤维素纳米纤丝气凝胶的制备及性能研究[J].中国造纸学报,2021,36(4):33-37 |
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| 磁性疏水性纤维素纳米纤丝气凝胶的制备及性能研究 |
| Preparation and Performance Research of Magnetic Hydrophobic Cellulose Nanofibril Aerogel |
| 投稿时间：2021-01-05 |
| DOI：10.11981/j.issn.1000-6842.2021.04.33 |
| 中文关键词: 纤维素纳米纤丝 十六烷基三甲氧基硅烷 Fe3O4纳米粒子 气凝胶 |
| Key Words:cellulose nanofibril hexadecyltrimethoxysilane Fe3O4 nanoparticles aerogel |
| 基金项目:天津市教委科研计划资助项目（2018KJ098）。 |
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| 中文摘要: |
| 以TEMPO氧化法制备的纤维素纳米纤丝（CNF）为原料制备CNF气凝胶，随后采用Fe3O4纳米粒子和十六烷基三甲氧基硅烷（HDTMS）对其进行改性制得磁性疏水性CNF气凝胶，并对其疏水性能、磁性、吸附性及其他各项性能进行表征。结果表明，交联剂N，N-亚甲基双丙烯酰胺（MBA）可提高CNF之间的结合强度，使气凝胶结构更加稳定、不易被破坏。制备得到的气凝胶密度和孔隙率分别为0.015 g/cm3和99.02%，其水接触角可达133°，表现出优异的超疏水性，吸附倍率最高可达145 g/g（机油）；同时，添加Fe3O4纳米粒子使气凝胶具备较好的磁响应性能，有利于气凝胶的后期回收。 |
| Abstract: |
| In this study， cellulose nanofibril （CNF） aerogel was prepared using TEMPO-oxidized CNF as raw material， and then modified by hexadecyltrimethoxysilane （HDTMS） and Fe3O4 nanoparticles to obtain magnetic hydrophobic CNF aerogel， the hydrophobicity， magnetism， adsorption， and other properties of which were characterized. The results indicated that the crosslinking agent N，N-methylenebisacrylamide （MBA） had a significant effect on the structure of the aerogel， which could increase the bonding strength between the filaments， rendering a more stable， unbreakable aerogel structure. The density and porosity of the prepared aerogel material reached 0.015 g/cm3 and 99.02%， respectively， and the water contact angle of the aerogel could reach 133°， showing excellent superhydrophobicity， and its adsorption capacity could reach 145 g/g （to motor oil）. Moreover， the addition of Fe3O4 nanoparticles endowed the aerogel with better magnetic response performance， which is beneficial to its recovery. |
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