| 石智萍,王颖超,李凯.原位调控细菌纤维素微凝胶孔径构建抗高表活“岛-链”触变网络[J].中国造纸,2025,44(10):77-85 |
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| 原位调控细菌纤维素微凝胶孔径构建抗高表活“岛-链”触变网络 |
| In-situ Pore Regulation of Bacterial Cellulose Microgel for High-surfactant-resistant “Island-Chain” Network |
| 收稿日期：2025-04-28 修订日期：2025-05-15 |
| DOI：10.11980/j.issn.0254-508X.2025.10.009 |
| 关键词: 细菌纤维素微凝胶 孔径调控 岛-链网络 流变行为 |
| Key Words:bacterial cellulose microgel pore size regulation island-chain network rheological behavior |
| 基金项目:国家自然科学基金（52263012，5256030125）、云南省“兴滇人才”计划项目（KKRD202205060，2022）、云南省教育厅工程研究中心项目（KKPU202205001）。 |
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| 摘要:本研究采用CaCO3含量调控（0~1 200 mg/L）、粒径筛选（0.5~100 μm）制备梯度孔径细菌纤维素微凝胶（BC-microgel），结合羟丙基甲基纤维素（HPMC）、脂肪醇聚氧乙烯醚（AEO）构建AEO/BC-microgel/HPMC复合体系。CaCO3含量为300 mg/L、粒径15 μm时可形成平均孔径3.17 μm的微凝胶结构，此时复合体系屈服应力达0.89 Pa，触变环面积提升至0.58 Pa/s，“岛-链”网络最稳；过量CaCO₃或粒径不当会导致孔结构紊乱、性能下降。本研究揭示了孔径调控与网络性能的构效关系，为高浓度表面活性剂体系功能化开发提供了理论依据。 |
| Abstract:In this study， hierarchical-pore bacterial cellulose microgels （BC-microgel） were prepared via methods including CaCO₃ content regulation （0~1 200 mg/L）， particle size screening （0.5~100 μm）. Then， AEO/BC-miccrogel/HPMC composite systems were constructed by combining with hydroxypropyl methyl cellulose （HPMC） and fatty alcohol-polyoxyethylene ether （AEO）. The results showed that when the CaCO₃ content was 300 mg/L and the particle size was 15 μm， the microgel structure with an average pore diameter of 3.17 μm could be formed. At this point， the “island-chain” network was stable and the yield stress of the composite system reached 0.89 Pa， and the thixotropic loop area increased to 0.58 Pa/s. Excessive CaCO₃ or improper particle size lead to disorder in pore structure and deterioration of performance. This study elucidated the structure-activity relationship between pore size regulation and network performance， thereby providing a theoretical basis for the functional development of high-concentra-tion surfactant systems. |
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