杨伟凯,陈昱文,张宗威,杨嘉玮,李建国,陈礼辉.Ca2+交联羧基化麦草秸秆化机浆的制备及性能研究[J].中国造纸学报,2023,38(2):69-76 |
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Ca2+交联羧基化麦草秸秆化机浆的制备及性能研究 |
Study on Preparation and Properties of Ca2+-Crosslinked Carboxylated Wheat Straw Chemi-mechanical Pulp |
投稿时间:2022-08-07 |
DOI:10.11981/j.issn.1000-6842.2023.02.69 |
中文关键词: 麦草秸秆化机浆 羧基化纤维 Ca2+交联 强度性能 |
Key Words:wheat straw chemi-mechanical pulp carboxylated fibers Ca2+ crosslinking strength properties |
基金项目:国家重点研发计划(2019YFC1905903);国家自然科学基金(31700520, 31971612)。 |
作者 | 单位 | 邮编 | 杨伟凯* | 福建农林大学材料工程学院,福建福州,350108 植物纤维功能材料国家林业和草原局重点实验室,福建福州,350108 | 350108 | 陈昱文 | 福建农林大学材料工程学院,福建福州,350108 植物纤维功能材料国家林业和草原局重点实验室,福建福州,350108 | 350108 | 张宗威 | 福建农林大学材料工程学院,福建福州,350108 植物纤维功能材料国家林业和草原局重点实验室,福建福州,350108 | 350108 | 杨嘉玮 | 福建农林大学材料工程学院,福建福州,350108 植物纤维功能材料国家林业和草原局重点实验室,福建福州,350108 | 350108 | 李建国 | 福建农林大学材料工程学院,福建福州,350108 植物纤维功能材料国家林业和草原局重点实验室,福建福州,350108 | 350108 | 陈礼辉 | 福建农林大学材料工程学院,福建福州,350108 植物纤维功能材料国家林业和草原局重点实验室,福建福州,350108 | 350108 |
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中文摘要: |
本研究采用TEMPO氧化体系,转化麦草秸秆化机浆(SP)纤维素C6位上的羟基为羧基,制备羧基化麦草秸秆化机浆(CSP);对CSP进行Ca2+交联,制备Ca2+交联羧基化麦草秸秆化机浆(CSP@Ca2+),探究其纸浆的物理强度性能。基于FT-IR、XPS等手段可以明显检测CSP 纤维的羰基/羧基官能团:羧基化1 h麦草秸秆化机浆纤维(CSP1)的羧酸含量为0.27 mmol/g,其Zeta电位从SP的-21.7 mV变化为-29.2 mV,这为Ca2+的交联提供作用位点。纸张物理强度结果表明,CSP1@Ca2+0.5的抗张指数、耐破指数和撕裂指数分别较SP提高154.4%、170.8%和12.9%。最终,CSP1@Ca2+0.5与SP配抄纸张(配抄比例为50∶50)的抗张指数、耐破指数和撕裂指数分别达27.1 N·m/g、2.28 kPa·m2/g和3.68 mN·m2/g,较SP分别提高83.4%、115.1%和8.3%。 |
Abstract: |
In this study, TEMPO oxidation was used to transform the hydroxyl group at C6 position of wheat straw pulp (SP) cellulose into carboxyl group to prepare carboxylated wheat straw pulp (CSP). Ca2+ crosslinked carboxylated wheat straw pulp (CSP@Ca2+) was prepared by crosslinking CSP with Ca2+, and its strength properties were explored. The carboxyl/carbonyl groups of CSP fibers were determined by using FT-IR and XPS: the carboxyl group content of CSP carboxylated for 1 h (CSP1) was 0.27 mmol/g and its Zeta potential varied from -21.71 to -29.2 mV, which provided reactive sites for Ca2+ crosslinking. Compared with SP, tensile, burst, and tear indexes of CSP1@Ca2+0.5 improved by 154.4%, 170.8%, and 12.9%, respectively. Tensile, burst, and tear indexes of the mixed CSP@Ca2+0.5/SP (50∶50) paper were 27.1 N·m/g, 2.28 kPa·m2/g, and 3.68 mN·m2/g, increased by 83.4%, 115.1% and 8.3%, respectively, compared with SP. |
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