Research and Application of Lignin Depolymerisation Products Modified Melamine-Based Ceramic Additives

doi:10.16552/j.cnki.issn1001-1625.2024.1615

Abstract

Abstract: To address the high production cost and poor storage stability of traditional melamine (SMF) ceramic additives, lignin depolymerisation products were used as raw materials to prepare lignin depolymerisation products modified melamine (SLMF) ceramic additives through a four-step method. Single-factor experiments were conducted to optimize the preparation conditions. Fourier transform infrared spectroscopy, elemental analysis, thermogravimetric analysis, gel permeation chromatography were used to characterize the structure and properties of materials. The results show that SLMF successful introduces lignin structure and its thermal stability is significantly better than that of SMF. Application performance tests demonstrate that SLMF achieves excellent results at 0.5% (mass fraction) addition and a ball milling time of 6 min, and ceramic slurry exhibits excellent performance: outflow time is 17.45 s, viscosity is 2.57×10^-2 Pa·s, thickening rate is 1.25, average particle size is 1 011.35 nm, and green body flexural strength reaches 2.95 MPa. Compared to SMF, SLMF shows significant improvements in grinding aid, dispersing, and strengthening properties. Microstructure and XRD analyses reveal that SLMF effectively reduces particle size, decreases voids, improves green body density, and enhances crystallinity, resulting in higher green body strength. Compared with commercial additives, SLMF demonstrates superior overall performance and promising application potential.

Key words: lignin depolymerisation product, melamine, ceramic additive, grinding aid property, dispersing property, strengthening property

CLC Number:

TQ174

CHEN Tao, LI Siyu, ZENG Qibin, LIU Yifan, LIU Minghua. Research and Application of Lignin Depolymerisation Products Modified Melamine-Based Ceramic Additives[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2025, 44(7): 2608-2616.

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