| 郭宇,刘梦茹,高其超,杨文博,李海龙.宣纸纤维原料青檀皮制浆过程中钙迁移规律的研究[J].中国造纸,2026,45(4):106-113 |
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| 宣纸纤维原料青檀皮制浆过程中钙迁移规律的研究 |
| Study on Calcium Migration During the Pulping Process of Pteroceltis tatarinowii Bark Used as a Fiber Raw Material for Xuan Paper |
| 收稿日期：2026-01-12 修订日期：2026-02-08 |
| DOI：10.11980/j.issn.0254-508X.2026.04.014 |
| 关键词: 宣纸 青檀皮 钙迁移 赋存形态 |
| Key Words:Xuan paper Pteroceltis tatarinowii bark calcium migration occurrence forms |
| 基金项目: |
| 作者 | 单位 | 邮编 | | 郭宇* | 1华南理工大学轻工科学与工程学院,造纸与污染控制国家工程研究中心, 广东广州,510640 | 510640 | | 刘梦茹* | 1华南理工大学轻工科学与工程学院,造纸与污染控制国家工程研究中心, 广东广州,510640 | 510640 | | 高其超 | 2华南理工大学先进技术研究院,广东广州,511442 | 511442 | | 杨文博 | 1华南理工大学轻工科学与工程学院,造纸与污染控制国家工程研究中心, 广东广州,510640 | 510640 | | 李海龙 | 1华南理工大学轻工科学与工程学院,造纸与污染控制国家工程研究中心, 广东广州,510640 | 510640 |
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| 摘要:宣纸纤维原料青檀皮中的碱性钙盐可防止纸张老化，提高宣纸耐久性。为探究青檀皮制浆过程中钙的迁移与转化特征，本研究对浸泡、蒸煮、漂白等关键工序进行分段取样，通过化学逐级提取与成分测定，系统分析了各工段所得青檀皮（浆）和制浆废液中的钙含量，并结合钙晶体分布及形貌特征，揭示了青檀皮制浆过程中钙的迁移、赋存形态及结构变化规律。结果表明，钙在青檀皮制浆过程中呈“前段流失-后段富集”的趋势，钙的存在形式由内源结合钙逐渐向外源钙盐沉积转变。经浸泡、蒸煮后，青檀皮中的内源钙随果胶等组分溶出，钙含量从21.90 g/kg减少至17.23 g/kg；在漂白阶段，引入的次氯酸钙转化为难溶性钙盐等外源钙沉积在浆中，使得钙含量显著回升至29.27 g/kg。在1 t青檀皮浆生产的制浆系统中，次氯酸钙是最大的钙输入源（34.36 kg/t，占比59.1%），虽然绝大部分钙（49.20 kg/t）流失到制浆废液中，但青檀皮浆中仍保留有8.98 kg/t的钙。 |
| Abstract:Pteroceltis tatarinowii bark， is considered beneficial for inhibiting paper aging and improving durability of Xuan paper. To investigate the migration and transformation of calcium during the pulping process of Pteroceltis tatarinowii bark， samples were taken at key stages including soaking， cooking， and bleaching separately. Sequential chemical extraction and compositional analyses were employed to systematically determine the calcium content in Pteroceltis tatarinowii bark (pulp) samples and pulping effluents from different processing stages. Combined with observations of calcium crystal distribution and morphology， the migration behavior， occurrence forms， and structural evolution of calcium during pulping were clarified. The results showed that calcium exhibited a trend of “initial loss followed by later enrichment” during the pulping process， and its occurrence gradually changed from endogenous bound calcium to externally introduced calcium salt deposits. After soaking and cooking， endogenous calcium in the Pteroceltis tatarinowii bark was released together with pectin and other components， resulting in a decrease in calcium content from 21.90 g/kg to 17.23 g/kg. During the bleaching stage， calcium hypochlorite introduced exogenous calcium， which was further converted into poorly soluble calcium salts and deposited in the pulp， causing the calcium content increased significantly to 29.27 g/kg. In a pulping system producing 1 ton of Pteroceltis tatarinowii bark pulp， calcium hypochlorite was the largest calcium input source， contributing 34.36 kg/t (59.1%). Although most of the calcium (49.20 kg/t) was lost in pulping effluents， 8.98 kg/t remained in the final Pteroceltis tatarinowii bark pulp. |
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