坚固的聚烯酸水凝具有稳定的胀和活性功能,由四分化纤维素纳米纤维和铁离子为吸收介层的吸收介层提供
Wenjiao Ge1, Shan Cao1, Han Yu1
1State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou 510640, China.
Carbohydrate polymers
|September 3, 2024
概括
使用烯酸,四分化纤维素纳米纤维 (QCNF) 和Fe3+的新型双网络水凝提供了增强的机械强度和吸水能力. 这些先进的水凝还具有活性食品包装应用的抗氧化和抗菌特性.
科学领域:
- 材料科学 材料科学 材料科学
- 聚合物化学 聚合物化学
背景情况:
- 开发具有平衡机械性能,吸收能力和主动功能的先进水凝仍然是一个挑战.
- 水凝对于吸收非常重要,但优化食品包装等应用的性能需要进一步的创新.
研究的目的:
- 为了合成和表征新的双网水凝,以提高吸收应用的性能.
- 研究四元化纤维素纳米纤维素 (QCNF) 和Fe3+对水凝性能的协同效应.
主要方法:
- 在QCNF和Fe3+的存在下,烯酸 (AA) 聚合形成双网水凝.
- 用光谱和显微镜分析来确认水凝结构和交叉连接.
- 机械测试 (拉伸强度,延伸强度,性,模量) 和在不同条件下测量膨胀比率.
- 通过DPPH测定评估的抗氧化活性和对大肠杆菌和金黄色杆菌的抗菌活性.
主要成果:
- 合成的PAA/QCNF/Fe3+ (PQFe) 水凝呈现出双网络结构,结合化学和物理交联.
- 取得了令人印象深刻的机械性能:拉伸强度为1.98 MPa,断裂延伸率为838.8%,性为7.47 MJ m-3,弹性模量为0.35 MPa.
- 与单网络水凝相比,PQFe水凝在不同的pH和盐水条件下表现出优越和稳定的膨胀比率.
- 观察到对大肠杆菌和黄金杆菌有显著的抗氧化和抗菌活性.
结论:
- CNF和Fe3+的协同作用组合有效地产生了强大的双网络水凝.
- PQFe水凝具有出色的机械强度,吸收能力和稳定性,以及宝贵的抗氧化和抗菌功能.
- 这些水凝作为活性食品包装的吸收性中间层具有显著的前景,提高了食品的保存和安全性.
相关概念视频
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