木粉改性及其对包装原纸性能的影响  

Modification of wood flour and effect on packaging base paper

作　　者：陈自豪 戴磊 龙柱 孙昌 陈萧 CHEN Zihao;DAI Lei;LONG Zhu;SUN Chang;CHEN Xiao(Laboratory of Papermaking,College of Textile Science and Engineering,Jiangnan University,Wuxi 214122,Jiangsu,China;Liaocheng Key Laboratory of High Yield Clean Pulping and Special Cultural Paper,Shandong Jincailun Paper Co.,Ltd.,Liaocheng 252000,Shandong,China)

机构地区：[1]江南大学纺织科学与工程学院造纸研究室,江苏无锡214122 [2]聊城市高得率清洁制浆特种文化纸重点实验室山东金蔡伦纸业有限公司,山东聊城252000

出　　处：《精细化工》2025年第3期654-659,共6页Fine Chemicals

基　　金：国家自然科学基金项目(22178208)。

摘　　要：使用均苯三甲酸(TF)、柠檬酸和(CA)3-氯-2-羟丙基三甲基氯化铵(CHPTAC)分别对杨木木粉进行改性,制得了3种改性木粉(TF木粉、CA木粉和CH木粉)。采用FTIR、XRD、TGA对改性前后木粉进行了表征和测试,阐释其改性机理。将其添加到废纸浆中制备了包装原纸。通过动态滤水、Zeta电位、环压强度、裂断长和撕裂指数、耐破指数的测试,考察了改性木粉对纸浆和包装原纸性能的影响。结果表明,TF木粉、CA木粉较原木粉(绝干木粉)均增加了酯基,CH木粉接枝了阳离子季铵盐基团;改性主要作用在木粉表面纤维素的非结晶区,3种改性木粉的结构未改变,而热稳定性略有提升。改性木粉对纸浆浆料滤水时间没有明显影响,但能提高木粉留着率。用含量(以绝干木粉的质量为基准,下同)为8%均苯三甲酸、8%柠檬酸或15%CHPTAC改性的木粉(TF8、CA8或CH15)制备包装原纸,与未添加改性木粉的包装原纸相比,当添加量(以纸浆质量为基准,下同)为10%时,制备的包装原纸的环压强度分别提高37%、45%和29%,裂断长分别提高29%、47%和41%。其中,CA8添加效果最好,添加CH15的环压强度略低。Poplar wood flour was modified with trimesic acid(TF),citric acid(CA)and 3-chloro-2-hydroxypropyltrimethyl ammonium chloride(CHPTAC),respectively,and three types of modified wood flour(TF wood flour,CA wood flour and CH wood flour)were obtained,and characterized via FTIR,XRD and TGA trying to clarify the modification mechanism,and then added to waste pulp to obtain packaging base paper.The effects of modified wood flour on the properties of pulp and packaging base paper were analyzed by dynamic water filtration,Zeta potential,ring compression strength,breaking length,tear index and break resistance index.The results demonstrated that TF and CA wood flour had more ester groups,while CH wood flour was grafted with cationic quaternary ammonium salt groups in comparison to basic wood flour(absolute dry wood flour).The modification mainly took place in the amorphous region of cellulose on the surface of wood flour,without changing the flour structure and the water filtration time of pulp,but showing improvement in thermal stability and wood flour retention rate.Comparing with those of the packaging base paper without addition of modified wood flour,the packaging base paper,prepared with addition amount of 10%wood flour(TF8,CA8 or CH15)modified with(based on the mass of absolute dry wood flour,the same below)8%homopteric acid,8%citric acid or 15%CHPTAC,showed an increase in the ring compression strength of 37%,45%and 29%,respectively and in the breaking length of 29%,47%and 41%,respectively.The packaging base paper with CA8 exhibited the best performance,while CH15 showed a slightly lower ring compressive strength but the largest increase in breaking length.

关 键 词：木粉 改性 包装原纸 强度 木粉留着率 造纸化学品 

分 类 号：TS761.7[轻工技术与工程—制浆造纸工程]