摘要
分别以碱木质素(ALL)与乙酰化木质素(ACL)为原料,使用氯仿(CF)或四氢呋喃(THF)制备不同质量分数的电喷溶液,利用静电喷雾技术得到了结构可控、高纯度的坍缩球状的木质素微纳颗粒。研究结果表明:木质素微纳颗粒的形态和尺寸与干燥速率有关,随着干燥速率提高,木质素微米颗粒平均直径从1.9μm增加到2.6μm,纳米颗粒直径主要分布在200~500 nm之间。此外,通过比较研究发现木质素涂层的疏水性主要受颗粒形态影响,颗粒尺寸越小,坍缩程度越大,则涂层的接触角越大。通过调控微纳颗粒形态、尺寸,可以获得不同疏水性能的材料。
Lignin micro/nano particles in collapsed spherical shape with controlled structure and high purity were obtained by electrostatic spraying technique using alkali lignin(ALL)and acetylated lignin(ACL)as raw materials dissolving in chloroform(CF)or tetrahydrofuran(THF)at different mass fractions.The results showed that the morphology and size of lignin micro/nano particles were dependent on the drying rate.As the drying rate increased,the average diameter of lignin microparticles increased from 1.9μm to 2.6μm,and the nanoparticle diameters were mainly distributed between 200-500 nm.Furthermore,a comparative study revealed that the hydrophobicity of the lignin coating was mainly influenced by the particle morphology.Using smaller-size particle,the greater degree of slumping,and the higher contact angle of the coating was obtained.By modulating the morphology and size of the micro/nano particles,materials with different hydrophobic properties could be obtained.
作者
欧阳琛
沈人杰
陈心茹
陈思君
任浩
OUYANG Chen;SHEN Renjie;CHEN Xinru;CHEN Sijun;REN Hao(College of Light Industry and Food Engineering,Nanjing Forestry University,Nanjing 210037,China)
出处
《林产化学与工业》
CAS
CSCD
北大核心
2023年第5期89-94,共6页
Chemistry and Industry of Forest Products
基金
江苏省大学生实践创新训练计划项目(202110298072Y)。
关键词
木质素
静电喷雾
微纳颗粒
lignin
electrospray
micro/nano particles
