Abstract: Calcium lignosulphonate was used to synthesize a spherical lignosulphonate resin in a cheap and non-toxic disperse medium by reversed phase suspension polymerization.The process conditions were optimized by orthogonal experiments.Under the optimal conditions(T=95℃,c_HCl=3 mol·L^-1,m_HCHO:m_CLS=7%,w_CLS=50%),globulation took about 20 min and the product was featured with excellent spherical shape,narrow particle size range,61.20%of water retention capacity,0.83 mmol·ml^-1 of total volume exchange capacity and 3.46 mmol·g^-1 of total exchange capacity.The results of Scanning Electron Micrograph and Scanning Probe Micrograph indicate that spherical lignosulphonate resin has a rugged surface with porous microstructure in the gel skeleton.The aver-age pore size of dry samples was determined to be 10.46 nm by the BET method.

Key words: spherical lignosulphonate resin, process optimization, structure characterization

摘要： Calcium lignosulphonate was used to synthesize a spherical lignosulphonate resin in a cheap and non-toxic disperse medium by reversed phase suspension polymerization.The process conditions were optimized by orthogonal experiments.Under the optimal conditions(T=95℃,c_HCl=3 mol·L^-1,m_HCHO:m_CLS=7%,w_CLS=50%),globulation took about 20 min and the product was featured with excellent spherical shape,narrow particle size range,61.20%of water retention capacity,0.83 mmol·ml^-1 of total volume exchange capacity and 3.46 mmol·g^-1 of total exchange capacity.The results of Scanning Electron Micrograph and Scanning Probe Micrograph indicate that spherical lignosulphonate resin has a rugged surface with porous microstructure in the gel skeleton.The aver-age pore size of dry samples was determined to be 10.46 nm by the BET method.

关键词: spherical lignosulphonate resin, process optimization, structure characterization