高压均质技术提高烟用料液稳定性

  目的  为改善烟用料液的均一性，避免分层、沉淀产生，运用高压均质技术提高料液的稳定性。  方法  通过选取不同的均质压力、均质次数探讨高压均质对料液稳定系数、离心沉淀率、颗粒粒径、烟草提取物粘度及颗粒沉降速率的影响。  结果  :（1）随着均质压力的升高，料液的稳定系数先增加后下降，离心沉淀率减小后又增大，均质压力120 MPa时料液稳定性较好；（2）随着均质次数的增加，料液的稳定系数增加，离心沉淀率下降后上升，根据回归分析的结果，均质次数7次时料液稳定性较好；（3）增大均质压力至150 MPa，料液颗粒粒径显著减小（均质前:1.02 μm；均质后:0.4 μm，P < 0.01），增加均质次数对料液颗粒粒径无显著影响；（4）均质次数较均质压力对料液烟草提取物粘度的影响更为显著；（5）增加均质压力至120 MPa，颗粒在料液中的沉降速率减小约45%（均质前:1.98 μm/s；均质后1.07 μm/s，P < 0.05）。  结论  高压均质技术可有效提高烟用料液均一、稳定性。 

Improving stability of tobacco casing by high pressure homogenization technology

Aim: In order to improve tobacco flavor homogeneity, avoid stratified precipitation, high pressure homogeneous technology was used to improve stability of liquid. Methods: The effects of high pressure homogenization on stability coefficient, centrifugal sedimentation rate, particle size, viscosity of tobacco extract and particle sedimentation rate were investigated by selecting different homogenization pressures and different number of homogenization times. Results: (1) With the increase of homogeneous pressure, the stability factor of the liquid increased first and then decreased, and the centrifugal sedimentation rate decreased first and then increased. The liquid stability was the best when the homogeneous pressure was 120 MPa; (2) With increase of the number of homogenization times, the stability factor of the liquid increased gradually, the centrifugal sedimentation rate decreased first and then increased. According to results of regression analysis, liquid stability reached the best level when homogenization was conducted 7 times; (3) As the homogeneous pressure increased to 150 MPa, particle diameter decreased significantly (before: 1.02μm; after: 0.4μm, P < 0.01). The increase of the number of homogenization times had no significant effect on particle diameter. (4) The number of homogenization times had a larger influence on liquid monomer viscosity compared with homogeneous pressure. (5) As the homogeneous pressure increased to 120 MPa, particle sedimentation rate decreased by about 45% (before: 1.98 μm/s; after: 1.07μm/s, P < 0.05). Conclusion: this experiments show that high pressure homogenization technology can effectively improve homogeneity and stability of tobacco flavor.