CN107441545B - 一种皮肤粘附型纳米银离子抗菌敷料的制备方法 - Google Patents
一种皮肤粘附型纳米银离子抗菌敷料的制备方法 Download PDFInfo
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Abstract
本发明公开了一种皮肤粘附型纳米银离子抗菌敷料的制备方法,以纯溶剂的氯仿和乙醇,按照1~3:1的体积比混合作为溶剂,溶解质量浓度为8%~20%,体积比为1~4:1的聚乳酸和聚乙二醇;将得到的混合溶液加入静电纺丝装置进行敷料的制备,将接收到的敷料利用灭菌法进行灭菌,取出后晾干;将晾干的敷料浸泡于质量浓度为硝酸银溶液中,取出后晾干,制得皮肤粘附型纳米银离子抗菌敷料。本发明的优点在于使用舒适,不需要压敏胶固定,可改善传统医用敷料透气性差、粘附性差、贴合度低、粘连伤口、不隔菌、不抗菌的问题;同时在使用中不影响皮肤运动、出汗,轻薄柔软,可反复揭贴,且无皮肤残留。
Description
技术领域
本发明属于医疗辅助用品技术领域,具体涉及一种皮肤粘附型纳米银离子抗菌敷料的制备方法。
背景技术
作为皮肤急慢性伤口的保护与抗菌愈合是常见的临床挑战。长期的医疗实践中证实了敷料在抗菌促愈合方面有重要的作用。传统棉质纤维或高分子纺织敷料作为伤口透气性隔离物,与皮肤贴合度低,舒适性差,需要胶条固定,影响皮肤出汗等正常生理代谢,隔菌能力弱,使用中必须经常性更换以避免敷料自身染菌长菌。同时,作为固定敷料的压敏胶等较黏性物质会引起皮肤的过敏反应的问题。
现代无纺敷料可以制备纳米级超细纤维形成伤口隔离物,这一类敷料孔隙小,比表面积大,孔隙率高,使用时贴合皮肤,透气隔菌。在纳米级无纺纤维上载入银离子,可有效解决无纺纤维自身抗菌的问题,银离子敷料同样需要压敏胶粘附固定在伤口或皮肤上,且使用中常常有氧化银残留在皮肤表面造成皮肤染色。
发明内容
本发明的目的是提供一种皮肤粘附型纳米银离子抗菌敷料的制备方法,解决了现有技术中存在的舒适度低、透气性差及不抗菌的问题。
本发明所采用的技术方案是,一种皮肤粘附型纳米银离子抗菌敷料的制备方法,具体步骤如下:
步骤1,将氯仿和乙醇的混合溶液作为溶剂溶解聚乳酸和聚乙二醇,形成混合溶液;
步骤2,将经步骤1得到的混合溶液添加到静电纺丝装置中,在15KV~30KV的电压、纺丝速度0.8ml/h~1.2ml/h的条件下,接收距离在5cm~15cm范围、接收厚度为0.1mm~0.8mm的敷料,将接收到的敷料浸泡利用灭菌法进行灭菌90min~180min,取出后晾干;
步骤3,将经步骤2处理后得到的敷料浸泡于硝酸银溶液中3min~5min,取出后晾干,制备得到皮肤粘附型纳米银离子抗菌敷料。
本发明的特点还在于:
步骤1中的氯仿和乙醇都为纯溶剂,按体积比1~3:1混合,聚乳酸和聚乙二醇溶液质量百分比浓度为8%~20%,混合体积比为1~4:1;聚乳酸为分子量在10000Da~800000Da的各类型号分子中的一种,聚乙二醇为分子量在2000Da~8000Da的各类型号分子中的一种。
步骤2中灭菌法为质量百分比浓度为70%~75%的乙醇浸泡灭菌法或化学气体灭菌法。
步骤3中的硝酸银溶液的质量百分比浓度为5%~50%。
本发明的有益效果是:
利用本发明的制备方法所制备的皮肤粘附型纳米银离子抗菌敷料质地柔软、轻薄,贴合皮肤,与皮肤亲和力强,使用时不易脱落,不需要压敏胶固定;亲水透气,不影响皮肤出汗等正常代谢及伤口愈合;还能隔菌、杀菌,有效阻挡各种致病菌,避免细菌滋生;使用无刺激,有效保护伤口;无胶黏性,剥离容易,且无皮肤残留。
附图说明
图1是利用本发明的制备方法制备得到的皮肤粘附型纳米银离子抗菌敷料的扫描电镜图;
图2中a、b是利用本发明的制备方法制备得到的皮肤粘附型纳米银离子抗菌敷料的XPS图;
图3是利用本发明的制备方法制备得到的皮肤粘附型纳米银离子抗菌敷料对革兰氏阴性菌的抑菌效果图;
图4是利用本发明的制备方法制备得到的皮肤粘附型纳米银离子抗菌敷料对革兰氏阳性菌的抑菌效果图;
图5是传统纤维敷料、普通PLA静纺敷料、利用本发明的制备方法制备得到的皮肤粘附型抗菌敷料对于伤口愈合时间的柱状图。
具体实施方式
下面结合附图和具体实施方式对本发明进行详细说明。
本发明提供一种皮肤粘附型纳米银离子抗菌敷料的制备方法,具体步骤如下:
步骤1,将纯溶剂的氯仿和乙醇,按照体积比1~3:1混合作为溶剂,溶解质量百分比浓度为8%~20%的聚乳酸和聚乙二醇,形成混合溶液,其中,聚乳酸和聚乙二醇的体积比为1~4:1;
步骤2,将经步骤1得到的混合溶液添加到静电纺丝装置中,在15KV~30KV的电压、纺丝速度0.8ml/h~1.2ml/h的条件下,接收距离在5cm~15cm范围、接收厚度为0.1mm~0.8mm的敷料,将接收到的敷料浸泡在质量百分比浓度为70%~75%的乙醇中灭菌90min~180min,取出后晾干;
步骤3,将经步骤2处理后得到的敷料浸泡于质量百分比浓度为5%~50%的硝酸银溶液中3min~5min,取出后晾干,制备得到皮肤粘附型纳米银离子抗菌敷料。
采用本发明的制备方法制备出的皮肤粘附型纳米银离子抗菌敷料,其特点在于:是一种具有亲水性、负电性的聚乳酸-聚乙二醇复合薄膜敷料,可负载一定量的银离子,并通过电荷引力、范德华力贴敷在伤口上,形成伤口的保护膜。
表1皮肤粘附型纳米银离子抗菌敷料的力学能力表
圆形样品膜直径 | 最大力/N | 拉伸强度/MPa | 断裂伸长率/% |
20mm | 15~35 | 0.5~5 | 30~200 |
由表1表明:利用本发明的制备方法制备出的皮肤粘附型纳米银离子抗菌敷料力学性能优异,与皮肤亲和力强,可以实现皮肤褶皱或关节处伤口的有效贴敷保护,不影响皮肤运动、出汗,能促进伤口愈合,不易脱落,可反复揭贴。
如图1所示,该图是利用本发明的制备方法制备出的皮肤粘附型纳米银离子抗菌敷料的扫描电镜图;如图2中a、b所示,是本发明的制备方法制备出的皮肤粘附型纳米银离子抗菌敷料的XPS图;从结构上可以得出,制备出的皮肤粘附型纳米银离子抗菌敷料由0.8μm~1μm载银符合纤维构成空隙直径为0.5μm~2μm的透气性薄膜敷料,其孔隙进与三维结构完全可以滞留细菌,透水透气。
如图3所示,该图是利用本发明的制备方法制备出的皮肤粘附型纳米银离子抗菌敷料对革兰氏阴性菌的抑菌效果图;如图4所示,该图是利用本发明的制备方法制备出的皮肤粘附型纳米银离子抗菌敷料对革兰氏阳性菌的抑菌效果图;对革兰氏阴性菌与革兰氏阳性菌培养,与普通纤维敷料相对比,直径3mm的皮肤粘附型纳米银离子抗菌敷料可以产生直径5mm~12mm抑菌圈,有明显的对比抑菌杀菌能力。
如图5所示,该图是传统纤维敷料、普通PLA静纺敷料、皮肤粘附型纳米银离子抗菌敷料对于伤口愈合时间的柱状图;对使用传统纤维敷料、普通PLA静纺敷料、皮肤粘附型纳米银离子抗菌敷料的皮肤浅表性伤口、表皮擦伤、真皮层切口的平均愈合时间进行统计发现,相对于一般棉质或静纺敷料,皮肤粘附型纳米银离子抗菌敷料可以有效促进伤口愈合。
实施例1
步骤1,将纯溶剂的氯仿和乙醇,按照体积比1:1混合作为溶剂,溶解质量百分比浓度为8%的聚乳酸和聚乙二醇,形成混合溶液,其中,聚乳酸和聚乙二醇的体积比为1:1;
步骤2,将经步骤1得到的混合溶液添加到静电纺丝装置中,在15KV电压、纺丝速度0.8ml/h条件下,接收距离5cm,接收厚度为0.8mm的敷料,将接收到的敷料浸泡在质量百分比浓度为70%的乙醇中灭菌180min,取出后晾干;
步骤3,将经步骤2处理后得到的敷料浸泡于质量百分比浓度5%的硝酸银溶液中3min,取出后晾干,制备得到皮肤粘附型纳米银离子抗菌敷料。
实施例2
步骤1,将纯溶剂的氯仿和乙醇,按照体积比3:1混合作为溶剂,溶解质量百分比浓度为8%的聚乳酸和聚乙二醇,形成混合溶液,其中,聚乳酸和聚乙二醇体积比为4:1;
步骤2,将经步骤1得到的混合溶液添加到静电纺丝装置中,在30KV电压、纺丝速度1.2ml/h条件下,接收距离15cm,接收厚度为0.1mm的敷料,将接收到的敷料浸泡在质量百分比浓度为75%的乙醇中灭菌90min,取出后晾干;
步骤3,将经步骤2处理后得到的敷料浸泡于质量百分比浓度为50%的硝酸银溶液中5min,取出后晾干,制备得到皮肤粘附型纳米银离子抗菌敷料。
实施例3
步骤1,将纯溶剂的氯仿和乙醇,按照体积比1:1混合作为溶剂,溶解质量百分比浓度为8%的聚乳酸和聚乙二醇,形成混合溶液,其中,聚乳酸和聚乙二醇体积比为1:1;
步骤2,将经步骤1得到的混合溶液添加到静电纺丝装置中,在20KV电压、纺丝速度1ml/h条件下,接收距离10cm,接收厚度为0.1mm的敷料,将接收到的敷料浸泡在质量百分比浓度为70%的乙醇中灭菌90min,取出后晾干;
步骤3,将经步骤2处理后得到的敷料浸泡于质量百分比浓度为15%的硝酸银溶液中5min,取出后晾干,制备得到皮肤粘附型纳米银离子抗菌敷料。
实施例4
步骤1,将纯溶剂的氯仿和乙醇,按照体积比3:1混合作为溶剂,溶解质量百分比浓度为20%的聚乳酸和聚乙二醇,形成混合溶液,其中,聚乳酸和聚乙二醇的体积比为4:1;
步骤2,将经步骤1得到的混合溶液添加到静电纺丝装置中,在15KV电压、纺丝速度1.2ml/h条件下,接收距离10cm范围内,接收厚度为0.8mm的敷料,将接收到的敷料浸泡在质量百分比浓度为75%的乙醇中灭菌180min,取出后晾干;
步骤3,将经步骤2处理后得到的敷料浸泡于质量百分比浓度为15%的硝酸银溶液中3min,取出后晾干,制备得到皮肤粘附型纳米银离子抗菌敷料。
实施例5
步骤1,将纯溶剂的氯仿和乙醇,按照体积比3:1混合作为溶剂,溶解质量百分比浓度为20%的聚乳酸和聚乙二醇,形成混合溶液,其中,聚乳酸和聚乙二醇的体积比为4:1;
步骤2,将经步骤1得到的混合溶液添加到静电纺丝装置中,在20KV电压、纺丝速度1ml/h条件下,接收距离12cm范围内,接收厚度为0.8mm的敷料,将接收到的敷料浸泡在质量百分比浓度为75%的乙醇中灭菌170min,取出后晾干;
步骤3,将经步骤2处理后得到的敷料浸泡于质量百分比浓度为10%的硝酸银溶液中4min,取出后晾干,制备得到皮肤粘附型纳米银离子抗菌敷料。
利用本发明的制备方法所制备的皮肤粘附型纳米银离子抗菌敷料使用舒适,不需要压敏胶固定,还可改善传统医用敷料透气性差、粘附性差、贴合度低、粘连伤口、不隔菌、不抗菌的问题;同时在使用中不影响皮肤出汗,轻薄柔软,可反复揭贴,且无皮肤残留。
Claims (5)
1.一种皮肤粘附型纳米银离子抗菌敷料的制备方法,其特征在于,具体步骤如下:
步骤1,将氯仿和乙醇混合后的溶液作为溶剂溶解聚乳酸和聚乙二醇,形成混合溶液,所述聚乳酸为分子量在10000Da~800000Da的各类型号中的一种,聚乙二醇为分子量在2000Da~8000Da的各类型号中的一种;
步骤2,将经步骤1得到的混合溶液添加到静电纺丝装置中,在15KV~30KV电压、纺丝速度0.8ml/h~1.2ml/h的条件下,接收距离在5cm~15cm范围、接收厚度为0.1mm~0.8mm的敷料,将接收到的敷料利用灭菌法进行灭菌90min~180min,取出后晾干;
步骤3,将经步骤2处理后得到的敷料浸泡于硝酸银溶液中,取出后晾干,制备得到皮肤粘附型纳米银离子抗菌敷料。
2.根据权利要求1所述的一种皮肤粘附型纳米银离子抗菌敷料的制备方法,其特征在于,在所述步骤1中:氯仿和乙醇都为纯溶剂,且氯仿和乙醇按体积比1~3:1混合;聚乳酸和聚乙二醇的溶液质量百分比浓度为8%~20%,混合体积比例为1~4:1。
3.根据权利要求1所述的一种皮肤粘附型纳米银离子抗菌敷料的制备方法,其特征在于,在所述步骤2中:灭菌法为质量百分比浓度为70%~75%的乙醇灭菌法或化学气体灭菌法。
4.根据权利要求1所述的一种皮肤粘附型纳米银离子抗菌敷料的制备方法,其特征在于,所述步骤3中:硝酸银溶液的质量百分比浓度为5%~50%。
5.根据权利要求1或4所述的一种皮肤粘附型纳米银离子抗菌敷料的制备方法,其特征在于,所述步骤3中:在硝酸银溶液中浸泡的时间为3min~5min。
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