赵亚涛,蹇玉兰,三福华,柴希娟,解林坤.西南桦木材表面的硅烷化及憎水和憎油特性[J].包装工程,2021,42(17):125-131.
ZHAO Ya-tao,JIAN Yu-lan,SAN Fu-hua,CHAI Xi-juan,XIE Lin-kun.Properties for Water and Oil Repellence of Betula AlnoidesWood Surfaces Treated by Silylation Method[J].Packaging Engineering,2021,42(17):125-131. |
| 西南桦木材表面的硅烷化及憎水和憎油特性 |
| Properties for Water and Oil Repellence of Betula AlnoidesWood Surfaces Treated by Silylation Method |
| 投稿时间：2021-03-11 |
| DOI：10.19554/j.cnki.1001-3563.2021.17.016 |
| 中文关键词: 西南桦木材 甲基三甲氧基硅氧烷 水解 憎水 憎油 |
| 英文关键词: betula alnoides wood methyltrimethoxysilane hydrolysis water repellence oil repellence |
| 基金项目:国家自然科学基金(31760184、31660179);国家级大学生创新创业训练计划(201810677001) |
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| 中文摘要: |
| 目的 解决制备憎油性材料时对含氟化合物的依赖，减小木材对水和油的吸收性，赋予木材表面双憎功能。方法 采用甲基三甲氧基硅烷(MTMS)与0.1 mol/L的盐酸以4∶1的体积比混合，并置于冰浴中超声水解不同的时间，将木材放入水解溶液中浸渍处理5 min，利用X-射线光电子能谱仪(XPS)、傅里叶红外光谱仪(FT-IR)分析改性前后木材表面的元素组成及化学结构，借助接触角测量仪考察改性木材对水和油的润湿特性，计算其吸水率和吸油率。结果 改性木材表面引入了大量的Si元素，并键合了低表面能的—CH3基团;水解时间由30 min延长至240 min，水接触角由79.8°增加至90.7°，但油接触角却稳定在50°左右;改性前后的吸水率均大于吸油率。结论 所制备的木材都具有双憎功能，憎水稳定性随水解时间的延长而提高，但憎油稳定性受水解时间的影响较小。 |
| 英文摘要: |
| In order to overcome the limitation that fabrication of oleophobic surfaces were always dependent on the use of fluorinated compounds, the amphiphobic wood surfaces were fabricated with non-fluorinated chemical which exhibited to resist against absorption of both water and oil. Methyltrimethoxysilane (MTMS) was mixed with 0.1 mol/L hydrochloric acid in a 4∶1 ratio, and then the mixture liquid was sonicated in an ice-bath for different lengths of time to induce hydrolysis. After hydrolysis, the wood was immersed in the hydrolyzed MTMS solutions to coated for 5 minutes. The elemental composition and surface chemistry of wood before and after coated with MTMS were analyzed by X-ray photoelectron spectroscopy (XPS) and fourier transformed infrared spectroscopy (FT-IR), the wetting behaviour for water and oil was measured with static contact angle, and the absorption of water and oil was measured by submerging the wood in the liquid for different times. The results showed that an abundance of Si element and the low surface energy of methyl groups were present on the coated wood surface; the water contact angles increased gradually from 79.8° to 90.7° as a function of hydrolysis time extending from 30 min to 240 min, while oil contact angles remained about at 50° essentially the same; the rate of water absorption before and after coated with MTMS was greater than that of oil absorption. The wood coated with MTMS was amphiphobicity and the hydrophobic stability raised with the increase of hydrolysis time, but the oleophobic stability was less affected by the hydrolysis time. |
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