两性木薯渣用于废纸浆助留助滤和改善成纸强度性能的研究  

Application of Amphoteric Cassava Dregs in ONP and Its Impacts on Retention,Drainage and Paper Physical Strength

作　　者：刘文静[1] 武书彬[1] 陶正毅[1] 

机构地区：[1]华南理工大学制浆造纸工程国家重点实验室,广东广州510641

出　　处：《林产化学与工业》2014年第2期61-66,共6页Chemistry and Industry of Forest Products

基　　金：国家自然科学基金资助项目(31270635);广东省产学研专项资助(2011A090200006)

摘　　要：探讨了两性木薯渣在不同用量、pH值、电导率、剪切力等条件下对废纸脱墨浆的细小纤维首程留着率、滤水性能以及手抄片物理性能的影响。研究结果表明,两性木薯渣用量为1.2%时,对废纸浆助留助滤效果最好,首程留着率可达90.46%,60 s滤液质量可达244.6 g;在pH值为8.5时助留效果最好,pH值超过8.5后助留助滤效果下降,因此两性木薯渣适用于在中偏弱碱性的抄造环境;随着电导率的升高,浆料细小组分首程留着率(FPR)降低了3.8%,数据表明两性木薯渣受电导率的影响较小;但两性木薯渣受剪切力影响较大,因此选择在压力筛出口处添加两性木薯渣有利于助剂发挥助留作用。同时两性木薯渣提高成纸的强度效果比较显著,抗张指数、耐破指数、撕裂指数和裂断长分别提高了104.38%、12.77%、12.95%和88.58%。The carboxymethylation pretreated cassava dregs grafted acrylamide and [ 2-methacryloyloxy ] trimethylammonium chloride（CMPCD-g-AD） was used in deinked pulp. The effects of the factors, including CMPCD-g-AD dosage, pH value, conductivity, and shearing force, on the retention, pulp drainage and handsheet physical properties were studied in this study. The results showed that the optimal retention and drainage could be obtained as the dosage of CMPCD-g-AD is 1. 2%, and the maximum value of drainage and first pass the retention （FPR） of recycled pulp is 244. 6 g in 60 s and 90. 46 %, respectively. The best pulp retention was acquired at pH 8. 5, and it decreased as the pH value was over 8. 5. Hence, the CMPCD-g-AD was suitable for applying in a nearly pH-neutral solution. The increasing of salt content had a adverse effect on drainage and the fines retention decreased slightly by 3. 8%. Shear force was negative for FPR, therefore, outlet of screen was proposed to be the point for adding CMPCD-g-AD. CMPCD-g-AD showed a significant positive impact on paper strength. The tensile index, burst index, tear index and breaking length were increased by 104. 38%,12. 77%,12. 95% and 88. 58%, respectively.

关 键 词：两性木薯渣 助留助滤 废纸脱墨浆 

分 类 号：TQ35[化学工程]