Preparation and Mechanical Properties of a Novel Textile Pad for Wound Debridement

Various types of wound debridement approaches are currently available in clinical practice such as autolytie, enzymatic. biodebridement, mechanical, and surgical debridemenl techniques. A critical look at these various options can explain their potential but also their limitations. In this study, a novel textile pad, which is composed of polyester filaments on the fleecy side and a bioeompatible coating on the opposite side, was made to provide a safe, inexpensive, easier and especially more efficient debridement process that can be used in all healthcare settings by all healthcare practitioners. Eighteen kinds of samples were prepared with different pile density, ground yarn count and coating amount. Dimensional morphology, stitch density, mass per unit area and mechanical properties were investigated to study the intrinsic relationship of structure and properties of textile pad for wound debridement. Results showed that tensile strength and suturing strength at piped site increased obviously with the increment of ground yarn count, while the amount of coating could also have a slight impact on these two properties. However, compressive load was mainly affected by pile density, with no obvious relation to ground yarn count and coating amount.     

含天然单萜复合物壳聚糖基纳米纤维的制备及抗菌性能研究

以麝香草酚、香芹酚和肉桂醛的复合物为抗菌剂,壳聚糖(CS)、聚氧化乙烯(PEO)为基材,利用静电纺丝法制得含天然单萜复合物CS/PEO纳米纤维材料;通过扫描电镜、红外光谱对纳米纤维的形貌、结构进行表征;考察聚乙二醇4000(PEG4000)和吐温80对单萜释放行为的影响;以振荡法分别测试了纳米纤维对大肠杆菌ATCC 8739和金黄色葡萄球菌ATCC 6538的抑菌性能。结果表明:制得的含天然单萜复合物CS/PEO纳米纤维表面光滑,粗细均一;PEG4000和吐温80对纤维中包裹的单萜有一定的保留作用;质量分数为5%的单萜复合物(m(麝香草酚)∶m(香芹酚)∶m(肉桂醛)=1∶1∶1)能在7 d中持续保持对大肠杆菌和金黄色葡萄球菌100%的抑制作用。     

PVDF/SiO2复合纳米纤维膜的制备及性能研究

采用静电纺丝技术,以聚偏氟乙烯（PVDF）为原料,掺杂不同质量纳米二氧化硅（SiO2）,制备PVDF/SiO2复合纳米纤维膜,研究分析复合纳米纤维膜的形貌、化学结构、晶型转变、拉伸性能和压电性能。结果表明：PVDF质量分数为10 %时,纤维平均直径为(473.97 ± 71.10)nm,纤网成膜良好,微观形貌清晰,PVDF/SiO2复合纳米纤维膜的直径范围为(514.96 ~ 834.16) nm,且纤维表面有颗粒状凸起;PVDF/SiO2复合纳米纤维膜的拉伸强力随纳米SiO2质量分数增大呈先增大后减小趋势,当纳米SiO2质量分数为0.3 %时,强力为(7.94 ± 0.68) N;静电纺丝的电场作用使PVDF由α晶型转变为β晶型,具备压电性能,输出电压值随纳米SiO2质量分数增大先上升后下降,当纳米SiO2质量分数为0.3 %时输出电压值最大,可达(2.00± 0.11)V。