细菌纤维素-ZnO/水性聚氨酯复合薄膜的制备与性能

吴景; 曾威; 邝美霞; 钟成

doi:10.13801/j.cnki.fhclxb.20200407.001

细菌纤维素-ZnO/水性聚氨酯复合薄膜的制备与性能

doi: 10.13801/j.cnki.fhclxb.20200407.001

吴景^1,,
曾威^1, ,,
邝美霞^1,,
钟成^2,

1.
天津科技大学　化工与材料学院，天津 300457
2.
天津科技大学　食品营养与安全国家重点实验室，天津 300457

基金项目: 天津市自然科学基金（19PTSYJC00060；19JCZDJC34700）

详细信息

通讯作者:
曾威，博士，副研究员，硕士生导师，研究方向为有机/无机杂化体系的制备与应用　E-mail：zwei@tust.edu.cn

中图分类号: TB332
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- 被引次数: 0
出版历程
- 收稿日期: 2020-02-04
- 录用日期: 2020-04-06
- 网络出版日期: 2020-04-08
- 刊出日期: 2020-12-15

Preparation and properties of bacterial cellulose-ZnO/waterborne polyurethane composite films

WU Jing^1
,,
ZENG Wei^{1
, ,},
KUANG Meixia^1
,,
ZHONG Cheng^2
,

1.
College of Chemical Engineering and Materials Science, Tianjin University of Science and Technology, Tianjin 300457, China
2.
State Key Laboratory of Food Nutrition and Safety, Tianjin University of Science and Technology, Tianjin 300457, China

摘要

摘要: 以细菌纤维素(BC)为模板，以ZnSO₄、NaOH和尿素为原料，通过水热法制备了具有新型刷状结构的细菌纤维素-ZnO(BC-ZnO)复合颗粒，尺寸约为3~5 μm，其中BC含量约为19wt%，并对其可能的形成机制进行阐述。将不同含量的BC-ZnO复合颗粒通过原位聚合法引入到水性聚氨酯(WPU)中得到细菌纤维素-ZnO/水性聚氨酯(BC-ZnO/WPU)复合薄膜，对复合膜的结构与性能进行了表征。结果表明：复合颗粒在WPU中分散良好；复合膜的拉伸强度在BC-ZnO含量为1.0wt%时达到最高，相较于纯WPU提高了84.6%；吸水率从16.5%降到4.9%；BC-ZnO的引入提高了复合膜的初始热稳定性；复合膜具有良好的抗菌性，当BC-ZnO含量为1.3wt%时，对金黄色葡萄球菌的抗菌率超过99%，对大肠杆菌的抗菌率超过85%。
- 细菌纤维素 /
- ZnO /
- 水性聚氨酯 /
- 复合材料 /
- 改性
Abstract: Bacterial cellulose-ZnO (BC-ZnO) composite particles were prepared through the hydrothermal synthesis method using BC as a template, using Zinc sulfate、NaOH and urea as raw materials. The results show that BC-ZnO composite particles are the novel brush-like structure with a size of 3-5 μm. BC filaments are wrapped in brush-like ZnO at a level of approximate 19wt%. The formation mechanism of the brush-like structure of the composite particles is explained. Bacteria cellulose-ZnO/waterborne polyurethane (BC-ZnO/WPU) composite film was obtained by introducing different contents of BC-ZnO composite particles into waterborne polyurethane by in-situ polymerization method, and the structure and performance of the composite film were characterized. SEM shows that composite particles are well dispersed in polyurethane. The properties reach the optimal when the proportion of BC-ZnO is 1.0wt%, the tensile strength is 84.6% higher than that of pure WPU; the water absorption is deceased from 16.5% to 4.9%; the addition of BC-ZnO improves the initial thermal stability of the composite film; the composite film shows good antibacterial properties. When the BC-ZnO content is 1.3wt%, the antibacterial rate against S. aureus exceeds 99% and the antibacterial rate against E. coli exceeds 85%.
- bacterial cellulose /
- ZnO /
- waterborne polyurethane /
- composites /
- modification

HTML全文

图 1 细菌纤维素(BC)-ZnO复合颗粒的XRD图谱

Figure 1. XRD patterns of bacterial cellulose (BC)-ZnO composite particles

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图 2 BC-ZnO复合颗粒的EDS分析

Figure 2. EDS spectrum analysis of BC-ZnO composite particles

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图 3 BC-ZnO复合颗粒的热失重曲线

Figure 3. TG curve of BC-ZnO composite particles

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图 4 不同反应时间BC-ZnO的FE-SEM图像

Figure 4. FE-SEM images of BC-ZnO with different reaction times

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图 5 BC溶胶的POM图像

Figure 5. POM image of BC sol

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图 6 BC-ZnO的TEM图像

Figure 6. TEM image of the BC-ZnO

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图 7 刷状BC-ZnO复合颗粒的合成示意图

Figure 7. Schematic illustration of the synthesis of the brush-like BC-ZnO composite particles

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图 8 水性聚氨酯(WPU)和BC-ZnO/WPU的FTIR图谱

Figure 8. FTIR spectra of WPU and BC-ZnO/waterborne polyurethane (WPU)

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图 9 WPU和BC-ZnO/WPU横断面SEM图像

Figure 9. Cross-sectional SEM images of WPU and BC-ZnO/WPU

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图 10 BC-ZnO含量对BC-ZnO/WPU复合膜力学性能的影响

Figure 10. Effect of BC-ZnO content on the mechanical properties of BC-ZnO/WPU composite films

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图 11 不同BC-ZnO含量的BC-ZnO/WPU复合膜的吸水率

Figure 11. Water uptake of BC-ZnO/WPU composite films with different BC-ZnO contents

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图 12 不同BC-ZnO含量的BC-ZnO/WPU复合膜的热分解曲线

Figure 12. TG curves of BC-ZnO/WPU composite films with different BC-ZnO contents

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图 13 BC-ZnO/WPU复合膜对大肠杆菌和金黄色葡萄球菌的抗菌作用

Figure 13. Antibacterial effect of BC-ZnO/WPU composite films against E.coli and S.aureus

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