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Chemistry and Industry of Forest Products ›› 2023, Vol. 43 ›› Issue (5): 89-94.doi: 10.3969/j.issn.0253-2417.2023.05.012

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Preparation of Lignin Micro/Nano Particles by Electrospray

Chen OUYANG, Renjie SHEN, Xinru CHEN, Sijun CHEN, Hao REN()   

  1. College of Light Industry and Food Engineering, Nanjing Forestry University, Nanjing 210037, China
  • Received:2022-07-08 Online:2023-10-28 Published:2023-10-27
  • Contact: Hao REN E-mail:renhao@njfu.edu.cn

Abstract:

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 1.9 μm to 2.6 μm, 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.

Key words: lignin, electrospray, micro/nano particles

CLC Number: