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| Preparation and Antibacterial Properties of Quaternized Modified Bacterial Cellulose |
| Received:June 18, 2025 Revised:July 04, 2025 |
| DOI：10.11980/j.issn.0254-508X.2025.10.003 |
| Key Words:bacterial cellulose antibacterial performance free radical polymerization |
| Fund Project:2024年科教产项目（2024ZDZX01）；济南市“新高校20条”资助项目（20228103）；济南市市校融合发展战略工程项目（JNSX2023040）；山东省自然科学基金（ZR2023QB038）；齐鲁工业大学科教产融合试点工程基础研究培新项（2023PX055）；山东省科技型中小企业创新能力提升工程项目（2023TSGC0319）。 |
| Author Name | Affiliation | Postcode | | LU Chengshuai* | State Key Lab of Green Papermaking and Resource Recycling, Qilu University of Technology （Shandong Academy of Sciences）, Ji’nan, Shandong Province, 250353 | 250353 | | RONG Xuhui | State Key Lab of Green Papermaking and Resource Recycling, Qilu University of Technology （Shandong Academy of Sciences）, Ji’nan, Shandong Province, 250353 | 250353 | | QIN Ke | State Key Lab of Green Papermaking and Resource Recycling, Qilu University of Technology （Shandong Academy of Sciences）, Ji’nan, Shandong Province, 250353 | 250353 | | MENG Guangfan | State Key Lab of Green Papermaking and Resource Recycling, Qilu University of Technology （Shandong Academy of Sciences）, Ji’nan, Shandong Province, 250353 | 250353 | | LI Xia | State Key Lab of Green Papermaking and Resource Recycling, Qilu University of Technology （Shandong Academy of Sciences）, Ji’nan, Shandong Province, 250353 | 250353 | | HAN Wenjia* | State Key Lab of Green Papermaking and Resource Recycling, Qilu University of Technology （Shandong Academy of Sciences）, Ji’nan, Shandong Province, 250353 | 250353 |
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| Abstract:In this study， bromination alkyl substitution was achieved by reacting 2-bromoisobutyryl bromide with the hydroxyl groups of the bacterial cellulose (BC) molecular chain， thereby anchoring bromine active groups onto the BC framework. Subsequently， surface-initiated atom transfer free radical polymerization (SI-ATRP) was employed to graft diallyldimethylammonium chloride (DADMAC) onto the BC surface， yielding quaternary ammonium bacterial cellulose (QBC). A systematic investigation was conducted to elucidate the structure， properties， and antibacterial mechanism of QBC. The result showed that extending the quaternization grafting reaction time resulted in the progressive grafting of DADMAC onto the BC chain， with the QBC24 sample obtained after 24 h. During this reaction， the surface roughness of QBC24 increased， the crystallinity index decreased significantly from 80.37% to 73.21%， and the surface Zeta potential shifted from -25.4 mV to 25.1 mV. The quaternary ammonium cations in QBC24 effectively disrupted bacterial cell structures， achieving antibacterial rates exceeding 99% against both Escherichia coli and Staphylococcus aureus， thereby demonstrating excellent broad-spectrum antibacterial performance. |
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