CN113287607A - 光热剂PACP-MnO2薄膜及其制备方法和应用 - Google Patents

光热剂PACP-MnO2薄膜及其制备方法和应用 Download PDF

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CN113287607A
CN113287607A CN202110376524.0A CN202110376524A CN113287607A CN 113287607 A CN113287607 A CN 113287607A CN 202110376524 A CN202110376524 A CN 202110376524A CN 113287607 A CN113287607 A CN 113287607A
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卢然
冉杰
田丽婷
马丽
程珂
吴光瑜
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Abstract

本发明公开了光热剂PACP‑MnO2薄膜及其制备方法和应用,属于抗菌膜材料技术领域。将PACP‑MnO2粉末溶于去离子水中,配制成PACP‑MnO2溶液,加入胶黏剂,震荡,静置后得到PACP‑MnO2薄膜。该光热剂PACP‑MnO2薄膜对大肠杆菌或金黄葡萄球菌有很好的抑制效果,同时,PACP‑MnO2薄膜表面的MnO2会消耗细菌表面的GSH,起到有效抗菌的目的。在980nm近红外光照射条件下,细菌可全部杀死。该薄膜材料具有很好的加工性,性能和结构具有很好的稳定性,可以应用于抗菌材料的制备中。

Description

光热剂PACP-MnO2薄膜及其制备方法和应用
技术领域
本发明属于抗菌膜材料技术领域,具体涉及光热剂PACP-MnO2薄膜及其制备方法和应用。
背景技术
我随着国的科技发展日新月异,人们的生活质量也得到了极大的提升,然而与此同时生存环境恶化,细菌微生物的不断滋生也严重地威胁着人们的身心健康。生活的环境中存在着诸多的有害微生物,它们的分布极为广泛,而且数量极其庞大,是人类健康的巨大隐患。生活中随处都会接触到像金黄色葡萄球菌、大肠杆菌和霉菌等细菌微生物,由于细菌传播化及病毒感染而导致患者死亡的事件时时在发生,令人触目惊。
目前研究较多的抗菌材料主要有以下几类:现如今经常用到的抗菌剂主要被分为以下几类:有机抗菌剂,无机抗菌剂和复合型抗菌剂。合成类有机抗菌剂主要包括:季较盐类、双脈类和二苯基酸类药物及其衍生物等等。虽然现在已经合成出来的有机类抗菌剂品种繁多且杀菌能力强,但是由于其较大的毒性且稳定差,甚至还会使有害微生物产生耐药性,使其应用受限。无机抗菌剂的特点是:耐热耐髙温,抗菌能力持久,无气味,较为安全。但是无机抗菌剂制备条件严苛,产率低,而且金属抗菌剂本身价格很高、抗菌过程中容易变色。近些年将无机抗菌剂同有机抗菌剂复合在一起,加工成复合型抗菌剂,通过两者之间的协同作用,在经济和抗菌性两方面形成互补。目前,光热抗菌正是一种备受关注的新型抗菌技术,即将具有较高光热转换效率的纳米结构材料,即光热剂输送到特定部位,随后用近红外光照射,光热剂能够将光能转化为热能产生过高热,从而通过细胞热消融途径来达到非侵入性的治疗效果。吸附剂PACP-MnO2在近红外光照条件下具有抗菌性,如果将其抗菌薄膜材料直接原位形成涂层,方便快捷。但是,需要额外提供一个基底材料,同时,由于薄膜厚度较薄,易破损;使其应用受到限制。
发明内容
针对现有技术中存在的问题,本发明要解决的一个技术问题在于提供光热剂PACP-MnO2薄膜的制备方法。本发明的要解决的另一个技术问题在于提供一种光热剂PACP-MnO2薄膜。本发明要解决的技术问题还有一个在于提供一种光热剂PACP-MnO2薄膜在制备抗菌材料中的应用。
为了解决上述问题,本发明所采用的技术方案如下:
光热剂PACP-MnO2薄膜的制备方法,将PACP-MnO2粉末溶于去离子水中,配制成PACP-MnO2溶液,加入胶黏剂,震荡,静置后得到PACP-MnO2薄膜。
所述光热剂PACP-MnO2薄膜的制备方法,所述胶黏剂为戊二醛;所述PACP-MnO2粉末与胶黏剂的质量体积比为0.03~0.05g/mL。
所述光热剂PACP-MnO2薄膜的制备方法,所述PACP-MnO2溶液的浓度为3~5g/L;加入胶黏剂后震荡25~35min,静置20~28h。
所述光热剂PACP-MnO2薄膜的制备方法,所述PACP-MnO2溶液的浓度为4g/L;所述PACP-MnO2粉末与胶黏剂的质量体积比为0.04g/mL;加入胶黏剂后震荡30min,静置24h。
上述光热剂PACP-MnO2薄膜的制备方法制备得到的光热剂PACP-MnO2薄膜。
上述光热剂PACP-MnO2薄膜在制备抗菌材料中的应用。
所述光热剂PACP-MnO2薄膜在制备抗菌材料中的应用,将所述光热剂PACP-MnO2薄膜与大肠杆菌或金黄葡萄球菌混合,在37℃条件下培养24h;然后再用近红外光照射0~5min。
所述光热剂PACP-MnO2薄膜在制备抗菌材料中的应用,近红外光的波长为980nm,辐射功率为1.5W;近红外光照射时间为5min,每1min摇动一次。
有益效果:与现有的技术相比,本发明的优点包括:
本发明将具有抗菌性能PACP-MnO2复合材料与合适的胶黏剂材料混合后得到PACP-MnO2薄膜材料,该材料在无近红外光照条件下展示良好的生物相容性,当有近红外光照条件下,细菌被快速杀死,说明该薄膜材料具有很好的加工性,性能和结构具有很好的稳定性,不易破损,方便长时间保存和使用;可以应用于抗菌材料的制备中。
附图说明
图1为实施例1制备的PACP-MnO2的扫描电子显微镜照片图;
图2为980nm近红外光照300s后大肠杆菌的扫描电子显微镜照片图;
图3为980nm近红外光照300s后金黄葡萄球菌发热扫描电子显微镜照片图;
图4为980nm近红外光照300s后细菌细胞的荧光图像;
图5为5mM GSH浓度下,300s后PACP-MnO2薄膜的扫描电子显微镜照片图。
具体实施方式
为使本发明的上述目的、特征和优点能够更加明显易懂,下面结合具体实施例对本发明的具体实施方式做详细的说明。
实施例1
1、吸附剂PACP的制备
将0.06g聚乙二醇辛基苯基醚(TritonX-100)添加到60mL的去离子水中形成均匀溶液,吸取0.38mL苯胺与0.29mL吡咯添加至溶液中,在室温下预冷1h;将过硫酸铵((NH4)2S2O8)水溶液添加至预冷混合物中0℃反应12h,离心超声得到沉淀,去离子水洗至无色,取黑色固体放入真空干燥箱中60℃下干燥24h,得到聚苯胺聚吡咯(PACP)空心球。
2、吸附剂PACP-MnO2的制备
称取0.13g的PACP,用45mL去离子水溶解配置成溶液,用盐酸将pH调整至1,随后超声15min。将12.5mL的0.05mol·L-1高锰酸钾(KMnO4)溶液加入至PACP溶液中,磁力搅拌器下反应4h,离心得到黑色沉淀,放入鼓风干燥箱中干燥24h,得到PACP-MnO2
3、光热剂PACP-MnO2薄膜的制备
称取0.20g的PACP-MnO2粉末溶于50mL去离子水溶解配置成溶液,加入5mL戊二醛溶液,充分震荡30分钟,然后静置24h,得到PACP-MnO2薄膜。图1为实施例1制备的PACP-MnO2薄膜的扫描电子显微镜照片图,由图1可知,该薄膜具有很好的稳定性,无近红外光照条件下展示良好的生物相容性。
对上述合成的光热剂PACP-MnO2薄膜与大肠杆菌或金黄葡萄球菌混合,设定温度为37℃,培养24小时;然后再用近红外光(980nm)对培养的溶液照射5分钟,通过DAPI和PI荧光分析活/死细菌,绿色表示活细胞,红色表示死细胞。
具体步骤如下:
(1)将耐药的金黄色葡萄球菌和大肠杆菌的单个菌落分别接种到50mL的无菌液体LB 培养基中,将耐药菌悬液在37℃的恒温培养摇床中以每分钟180转的速度孵育一夜;
(2)使用无菌磷酸盐缓冲盐水(PBS)将细菌稀释为1×106 CFU/mL,将PACP-MnO2薄膜裁成1cm*1cm尺寸大小;
(3)将200μL上述细菌溶液和1cm*1cm PACP-MnO2薄膜震荡摇匀,对细菌样品施加近红外辐射,照射时间为5分钟,每1分钟摇动一次;辐射功率为1.5W,波长980nm,每组平行三次。
(4)反应后溶液加入500μL无菌水高速离心洗涤菌液后留下沉淀,加水稀释至500μL。然后用200μL DAPI(12.5 μg/m L)和PI (1.25 μg/mL)染色15 min,室温避光放置30min后,取10μL溶液用于激光扫描荧光共聚焦显微镜成像。
图2为980nm近红外光照300s后,大肠杆菌的SEM图片,两端破裂说明大肠杆菌在光热条件下死亡。图3为980nm近红外光照300s后,金黄葡萄球菌的SEM图片,两端破裂说明金黄葡萄球菌在光热条件下死亡。图4为980nm近红外光照300s后,大肠杆菌染色后的荧光显微镜照片,红色说明大肠杆菌全部死亡。图5为PDA-MnO2薄膜5mM GSH浸泡300S后SEM,连续薄膜部分开裂,说明薄膜对GSH有响应效果。以上试验结果说明说明该薄膜材料具有很好的加工性,性能和结构具有很好的稳定性,可以应用于抗菌材料的制备中。

Claims (8)

1.光热剂PACP-MnO2薄膜的制备方法,其特征在于,将PACP-MnO2粉末溶于去离子水中,配制成PACP-MnO2溶液,加入胶黏剂,震荡,静置后得到PACP-MnO2薄膜。
2.根据权利要求1所述光热剂PACP-MnO2薄膜的制备方法,其特征在于,所述胶黏剂为戊二醛;所述PACP-MnO2粉末与胶黏剂的质量体积比为0.03~0.05g/mL。
3.根据权利要求1所述光热剂PACP-MnO2薄膜的制备方法,其特征在于,所述PACP-MnO2溶液的浓度为3~5g/L;加入胶黏剂后震荡25~35min,静置20~28h。
4.根据权利要求1所述光热剂PACP-MnO2薄膜的制备方法,其特征在于,所述PACP-MnO2溶液的浓度为4g/L;所述PACP-MnO2粉末与胶黏剂的质量体积比为0.04g/mL;加入胶黏剂后震荡30min,静置24h。
5.权利要求1~4任一所述光热剂PACP-MnO2薄膜的制备方法制备得到的光热剂PACP-MnO2薄膜。
6.权利要求5所述光热剂PACP-MnO2薄膜在制备抗菌材料中的应用。
7.根据权利要求6所述光热剂PACP-MnO2薄膜在制备抗菌材料中的应用,其特征在于,将所述光热剂PACP-MnO2薄膜与大肠杆菌或金黄葡萄球菌混合,在37℃条件下培养24h;然后再用近红外光照射0~5min。
8.根据权利要求6所述光热剂PACP-MnO2薄膜在制备抗菌材料中的应用,其特征在于,近红外光的波长为980nm,辐射功率为1.5W;近红外光照射时间为5min,每1min摇动一次。
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