纤维素/氧化纤维素/南极磷虾蛋白复合抗菌纤维的制备与表征

为改善纤维素/磷虾蛋白(C/AKP)复合纤维的可降解性和抗菌性,在原液中加入氧化纤维素(DAC)制备C/DAC/AKP纺丝原液,采用湿法纺丝技术分别在H₂SO₄/Na₂SO₄/ZnSO₄和H₂SO₄/Na₂SO₄/KAl(SO₄)₂凝固浴中凝固后制得复合纤维,研究了DAC及凝固浴组分对纤维分子间作用、体外降解、抑菌以及热稳定等结构和性能的影响。结果表明:在相同的凝固浴中,相比于C/AKP复合纤维,C/DAC/AKP复合纤维体系内分子间氢键含量从24.26%增加至32.96%,热稳定性提高7.5%,降解性也有所改善;凝固浴中KAl(SO₄)₂的加入会提高纤维的分子间氢键以及热稳定性,同时C/AKP和C/DAC/AKP复合纤维均具有良好的抗菌效果,在生物材料方面具有良好的应用前景。

Preparation and characterization of cellulose/dialdehyde cellulose/Antarctic krill protein antibacterial fibers

In order to improve the degradability and antibacterial properties of cellulose/krill protein (C/AKP) composite fibers, C/DAC/AKP spinning solutions were prepared by adding dialdehyde cellulose (DAC) into the C/AKP solution. Fibers were produced from the C/DAC/AKP spinning solution using wet spinning technology, which was coagulated in H₂SO₄/Na₂SO₄/ZnSO₄ and H₂SO₄/Na₂SO₄/KAl(SO₄)₂ coagulation bath. The effects of DAC and coagulation bath components on the structures and properties of the fibers, such as intermolecular action, in vitro degradation, bacteriostasis and thermal stability, were investigated. The results show that using the same coagulation bath, the C/DAC/AKP composite fibers, demonstrate an increase of 24.26% to 32.96% in intermolecular hydrogen bonds in the system and a 7.5% increase in thermal stability compared to that for the C/AKP composite fibers, together with improved degradability. It is also made clear that the addition of KAl(SO₄)₂ in the coagulation bath improves the intermolecular hydrogen bond content and thermal stability of the fibers. It is illustrated that both C/AKP and C/DAC/AKP composite fibers have good antibacterial activity, and have good application prospects for biomaterials.