将聚胺固着剂（PA）、阳离子聚丙烯酰胺助留剂（CPAM）单独以及协同处理旧新闻纸浆，采用聚焦光束反射测定仪（FBRM）考察浆料中残余胶体粒子的数量、尺寸和尺寸分布，探讨固着剂/助留剂协同控制纸浆中溶解与胶体物质（DCS）的效果和机理。结果表明，PA单独处理纸浆时，会产生部分不能固着于纸张纤维或不被纤维网络截留的粒子聚集体；CPAM单独处理纸浆时，其电荷容易被DCS中和，导致其减少纸浆胶体粒子数量的效果明显下降，但不产生粒子聚集体；PA/CPAM协同处理纸浆时，后续的CPAM处理能将PA预处理纸浆时产生的部分粒子聚集体进一步固着到纸张纤维上，达到更好地降低胶体粒子数量的效果，且不产生更大的粒子聚集体。
A polyamine(PA) fixing agent, and a cationic polyacrylamide(CPAM) retention aid are used individually as well as in combination to treat the old newsprint pulp, and the focused beam reflectance measurement(FBRM) is used to measure the quantity, the size and the size distribution of the colloidal particles in the pulp filtrate, to reveal the combinative effect of the fixing agent and the retention aid on the controlling of the dissolved and colloidal substances(DCS) in the papermaking pulp raw material. It is indicated that when the PA is used singly to treat the pulp, some colloidal agglomerates will be formed which are not fixed with the fiber or not trapped in the fiber mat, thus they reside in the pulp filtrate; when the CPAM is used singly, its charge will be neutralized easily by the DCS, therefore, its ability to reduce the quantity of colloidal particles in the pulp will be weakened greatly, and larger colloidal agglomerates will not form; when the PA and the CPAM are used in combination, those agglomerates formed by the PA but resided in the aqueous phase will be further retained onto the fiber by the CPAM, in this course, the quantity of the colloidal particles will be reduced and larger colloidal agglomerates that form in the PA treatment will not form.
[1] Rebarber E S.How to avoid white pitch and its many pitfalls[J].TAPPI Journal,1995,78(5):252-254.
[2] Gill R I S.Chemical control of deposits-scopes and limitations[J].Paper Technology,1996,37(7):23-31.
[3] 陈嘉翔.废纸制浆技术的研究进展[J].中国造纸,2003,22(2):43-48.Chen Jiaxiang.Research progress in pulping technology of waste paper[J].China Pulp & Paper,2003,22(2):43-48.
[4] 王立军,陈夫山,张凤山.采用ATC和助留剂控制废纸浆微胶粘物含量[J].中国造纸,2005,24(10):7-9.Wang Lijun,Chen Fushan,Zhang Fengshan.Controlling micro-stickies contents of waste paper based pulp by anionic trash catcher and retention agent[J].China Pulp & Paper,2005,24(10):7-9.
[5] 陈启杰,陈夫山.PVAm/HCS/CPAM三元体系对废纸浆DCS控制的研究[J].中华纸业,2008,29(12):18-22.Chen Qijie,Chen Fushan.A study on PVAm/HCS/CPAM triple system to DCS control of wasterpaper pulp[J].China Pulp & Paper Industry,2008,29(12):18-22.
[6] 李师珍,薛国新,王娟,等.C-CDP/CPAM/MMT三元体系控制废纸浆DCS的作用与效果[J].中华纸业,2013,34(22):14-18.Li Shizhen,Xue Guoxin,Wang Juan,et al.The function and effect of CCDP/CPAM/MMT triple system to control the DCS in recycled pulp[J].China Pulp & Paper Industry,2013,34(22):14-18.
[7] Blanco A,De La Fuente E,Negro C,et al.Focused beam reflectant mea-surement as a tool to measure flocculation[J].TAPPI Journal,2002,10(1):14-20.
[8] Uduman N,Qi Y,Danquah M K.Marine microalgae flocculation and fo-cused beam reflectance measurement[J].Chemical Engineering Journal,2010,162(3):935-940.
[9] Greaves D,Boxall J,Mulligan J,et al.Measuring the particle size of a known distribution using the focused beam reflectance measurement tech-nique[J].Chemical Engineering Science,2008,63(22):5410-5419.
[10] Ruf A,Worlitschek J,Mazzotti M.Modeling and experimental analysis of PSD measurements through FBRM[J].Particle & Particle Systems Char-acterization,2000,17(4):167-179.
[11] 胡芳,谢来芳.利用胶体滴定对纸浆悬浮液进行电荷分析[J].中国造纸,2002,21(3):12-16.Hu Fang,Xie Laifang.Charge analysis of pulp by colloid titration[J].Chi-na Pulp & Paper,2002,21(3):12-16.
[12] 叶晓春.胶体滴定技术与湿部化学过程的控制[J].纸和造纸,2003(4):5-8.Ye Xiaochun.Colloidal titration technology and control of wet end chem-istry process[J].Paper & Paper Making,2003(4):5-8
[13] Wang L,Zhang Y,Chen H,et al.Effect of fixing agent dosage on the mechanism of colloidal substances retention onto pulp[J].BioResources,2014,9(2):3225-3235.
[14] Wang L,Zhang Y,Li G.Behavior of polyamine fixing agents on agglom-erating dissolved and colloidal substances in papermaking[J].BioRe-sources,2014,9(1):472-481.
[15] Hulkko V M,Deng Y.Effects of water-soluble inorganic salts and organ-ic materials on the performance of different polymer retention aids[J].Journal of Pulp and Paper Science,1999,25(11):378-383.
[16] 张旖倩.固着剂作用下纸浆中溶解与胶体物质的聚集行为研究[D].天津:天津科技大学,2014.Zhang Yiqian.Behavior of fixing agents on agglomerating dissolved and colloidal substances in papermaking[D].Tianjin:Tianjin University of Science & Technology,2014.
[17] 刘温霞,邱化玉.造纸湿部化学[M].北京:化学工业出版社,2005:106-107.Liu Wenxia,Qiu Huayu.Papermaking wet-end chemistry[M].Beijing:Chemical Industry Press,2005:106-107.
