CN115154670B - 一种石墨烯相氮化碳-硫化铋/高分子复合气管支架 - Google Patents
一种石墨烯相氮化碳-硫化铋/高分子复合气管支架 Download PDFInfo
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Abstract
本发明公开了一种石墨烯相氮化碳‑硫化铋/高分子复合气管支架,包括:将硫化铋附着在掺杂锌的石墨烯相氮化碳表面上构建掺杂锌的石墨烯相氮化碳‑硫化铋异质结复合粉末,将制备好的复合粉末加入到乙醇中制成乙醇悬浮液,然后与高分子乙醇悬浮液超声混合,离心干燥,得到掺杂锌的石墨烯相氮化碳‑硫化铋和高分子复合粉末,通过选择性激光烧结技术制得掺杂锌的石墨烯相氮化碳‑硫化铋高分子复合气管支架。本发明制备的复合气管支架在近红外光激发下能产生局部高温以及大量活性氧,从而起到良好的杀菌作用,同时支架释放的锌离子还具有促进气管软骨再生功能。
Description
技术领域
本发明属于化合物材料制备技术领域,更具体地说,本发明涉及一种石墨烯相氮化碳-硫化铋/高分子复合气管支架。
背景技术
由于恶性肿瘤、外伤、气管狭窄或其他病变等造成的气管损伤患者的越来越多。对于成人来说,气管损伤长度应该小于气管总长度的50%,对于小孩来说,气管损伤长度应小于气管总长度的30%。而长段气管缺损患者数量较多,几乎占气管狭窄案例的一半,且其造成的死亡率高达77%,所以临床上对于长段气管缺损的修复问题不可忽视,急需移植合适的人工气管支架。然而高分子复合气管支架表面没有相应的保护层,细菌容易黏附在气管支架表面造成细菌感染,严重影响修复效果。因此,开发具有良好的抗细菌感染功能的高分子复合气管支架对于治疗植入相关感染具有重大的临床价值。
青霉素和粘菌素等抗生素的研发对细菌性疾病的治疗提供了可行性的方法。但是长期使用和过度使用抗生素促进了具有抗生素耐药性的细菌进化。为了应对这一难题,仍在研发并使用新型抗生素和耐药性抑制剂。然而细菌对目前几乎所有的抗生素都不敏感,未来单纯依靠抗生素和相关方法来控制细菌感染将变得相当危险,因此迫切需要新的抑制和杀死细菌的策略。
光动力抗菌疗法由于其侵袭性小、选择性高、副作用小等优点,在功能性医疗器械领域显示出巨大的潜力。其主要是利用光敏剂吸收光能产生活性氧(ROS),然后ROS可以破坏细菌蛋白质甚至DNA,最终达到杀菌作用。然而,现有的生物膜和细菌膜的屏障功能可以阻止ROS的渗透,这降低了光动力抗菌效率。
目前已有多种提高细菌体内ROS有效浓度的策略,包括防止细菌粘附、破坏生物膜完整性、增强细菌膜通透性等。其中,光热处理是一种同时针对生物膜和细菌膜的有效方法,因为高温不仅能破坏生物膜结构,还能增强膜的透性。同时,它在抗菌应用方面也有许多优点,如侵袭性小、组织穿透深度深、无耐药性等。因此,将光动力疗法与光热疗法相结合,会起到显著的协同抗菌效果。
近年来,二维(2D)纳米材料作为光敏剂因其较大的表面积和独特的光学性质而引起了研究者的广泛关注。其中,石墨氮相化碳作为一种二维无金属光敏剂,由于具有良好的生物相容性、适中的带隙和良好的稳定性,在光动力抗感染方面得到了广泛的报道。硫化铋作为一种二元金属硫化物,由于其良好的生物相容性、光热转换效率高、物理化学稳定性,被广泛应用于抗菌研究。同时,掺杂锌的石墨烯相氮化碳和硫化铋可以通过静电作用形成紧密结合,构建掺杂锌的石墨烯相氮化碳-硫化铋异质结。此外,在软骨修复过程中,气管支架仅具有抗菌功能而不具有组织再生功能是不够的。因此,为了促进抗感染后的气管再生,将营养微量元素Zn掺杂到石墨烯相氮化碳中形成掺杂锌的石墨烯相氮化碳。然而,现有技术中,仍没有将掺杂锌的石墨烯相氮化碳与硫化铋复合并且掺入到高分子中制备成气管支架的研究。
由于气管支架移植后易受到细菌黏附和感染,传统抗生素对目前具有多重耐药性的细菌不起作用,以及银等重金属虽然对细菌有优异的杀菌效果,但是重金属沉积在人体体内对人体也有毒害作用。因此,寻求一种新的无毒无害,更加安全的抗菌方法来解决气管支架移植后的感染问题是非常必要的。
发明内容
本发明的一个目的是解决至少上述问题和/或缺陷,并提供至少后面将说明的优点。
为了实现根据本发明的这些目的和其它优点,提供了一种石墨烯相氮化碳-硫化铋/高分子复合气管支架,包括:将硫化铋附着在掺杂锌的石墨烯相氮化碳表面上构建掺杂锌的石墨烯相氮化碳-硫化铋异质结复合粉末,将制备好的掺杂锌的石墨烯相氮化碳-硫化铋异质结复合粉末加入到乙醇中制成乙醇悬浮液,然后与高分子乙醇悬浮液超声混合,离心干燥,得到掺杂锌的石墨烯相氮化碳-硫化铋和高分子复合粉末,最后通过选择性激光烧结技术制得所述掺杂锌的石墨烯相氮化碳-硫化铋高分子复合气管支架,其中所述高分子为聚乳酸、聚乙醇酸、聚乳酸-羟基乙醇酸共聚物、聚己内酯、聚对二氧环已酮中的至少一种。
优选的是,其中,掺杂锌的石墨烯相氮化碳-硫化铋异质结复合粉末的质量分数为2~10wt%,高分子的质量分数为90~98wt%,所述高分子的粒径为40~60μm,所述掺杂锌的石墨烯相氮化碳-硫化铋异质结复合粉末的粒径为1~4μm。
一种掺杂锌的石墨烯相氮化碳-硫化铋/高分子复合气管支架的制备方法,包括以下步骤:
步骤一、首先,将硫脲溶解在去离子水中,得到硫脲溶液,硫脲与去离子水的质量体积比为1g:10mL,随后向硫脲溶液中加入硝酸铋,硫脲与硝酸铋的质量比为5:2;在第一温度下搅拌第一预设时间;随后,将产物转移到高压釜中,在第二温度下保温第二预设时间,洗涤干燥后获得硫化铋纳米棒;
步骤二、将三聚氰胺放置在马弗炉中从室温升温到第三温度并保温第三预设时间,得到块体后研磨成粉末,然后将粉末在第三温度下继续持续第三预设时间,最后得到类石墨烯相氮化碳纳米片;
步骤三、将制备好的类石墨烯相氮化碳纳米片溶解在去离子水中,类石墨烯相氮化碳纳米片和去离子水的质量体积比为1g:30mL,并超声处理第四预设时间;随后按照类石墨烯相氮化碳纳米片与醋酸锌为第一质量比添加醋酸锌,并在第四温度下搅拌至液体完全挥发;然后将所得产物干燥,将产物放置在马弗炉中在第三温度下保温第三预设时间,最后得到掺杂锌的类石墨烯相氮化碳纳米片;
步骤四、按照第二预设质量比,称取一定量的掺杂锌的类石墨烯相氮化碳纳米片和硫化铋纳米棒加入到盛有乙醇和水的烧杯中,通过超声分散将硫化铋附着在掺杂锌的类石墨烯相氮化碳纳米片上,然后将混合溶液离心干燥第五预设时间,得到掺杂锌的掺杂锌的石墨烯相氮化碳-硫化铋异质结复合粉末;
步骤五、按照第四预设质量比,称取一定量的掺杂锌的掺杂锌的石墨烯相氮化碳-硫化铋异质结复合粉末和高分子粉末并加入到盛有无水乙醇的烧杯中,通过超声分散第四预设时间实现均匀分散,然后将混合溶液离心干燥,得到掺杂锌的类石墨烯相氮化碳-硫化铋/高分子复合粉末;
步骤六、将所述掺杂锌的类石墨烯相氮化碳-硫化铋/高分子复合粉末置于选择性激光烧结系统中,根据预先建立的三维模型进行层层烧结,烧结完成后去除未烧结粉末,即得到掺杂锌的石墨烯相氮化碳-硫化铋/高分子复合气管支架。
优选的是,其中,所述步骤一中,所述第一温度为60℃,所述第一预设时间为10min;第二温度为180℃,第二预设时间为20h。
优选的是,其中,所述步骤二和步骤三中,所述第三温度为550℃,第三预设时间为4h。
优选的是,其中,所述步骤三中,所述第四预设时间为30min,第一质量比为1:0.8,第四温度为80℃。
优选的是,其中,所述步骤四中,所述第二预设质量比为2:1,掺杂锌的类石墨烯相氮化碳纳米片、乙醇和水的质量体积比为1g:30mL:30mL,第五预设时间为6h。
优选的是,其中,所述步骤五中,所述第四预设的质量比为2~10:90~98,每1g总质量的掺杂锌的石墨烯相氮化碳-硫化铋异质结复合粉末和高分子粉末对应30mL无水乙醇。
优选的是,其中,所述步骤六中,在激光烧结过程中,激光功率为3~6W,扫描速度为100~300mm/s,扫描间距为0.08~0.12mm,光斑直径为0.3~1.0mm,所述掺杂锌的类石墨烯相氮化碳-硫化铋/高分子复合粉末对应的粉层厚度为0.1mm,对应的粉床预热温度为140~160℃。
优选的是,其中,掺杂锌的石墨烯相氮化碳-硫化铋/高分子复合气管支架应用于新型气管植入材料。
本发明至少包括以下有益效果:本发明是一种3D打印掺杂锌的石墨烯相氮化碳-硫化铋/高分子复合气管支架及其制备方法,所述掺杂锌的石墨烯相氮化碳-硫化铋/高分子复合气管支架由选择性激光烧结技术制成,具有良好的孔隙率,有利于气管支架上的细胞黏附和分化以及血管的生成和组织再生。此外,还具有快捷高效的近红外光抗菌性能和良好的促进软骨细胞增殖和分化等优势。同时,降解速率与气管组织再生速率匹配,无需进行二次手术。
综上所述,本发明中制备的掺杂锌的石墨烯相氮化碳-硫化铋/高分子粉末、使用的选择性激光烧结技术、复合材料中的掺杂锌的石墨烯相氮化碳-硫化铋含量是发明人多次实验和创造性的劳动成果,本发明通过对掺杂锌的石墨烯相氮化碳-硫化铋的含量控制以及调整激光烧结系统的工艺参数,制备得到一种掺杂锌的石墨烯相氮化碳-硫化铋/高分子复合支架以应对相关植入物的细菌感染问题,在生物医用领域有广泛的应用价值,制备得到的石墨烯相氮化碳-硫化铋/高分子复合气管支架的抗菌率达到90%以上。
本发明的其它优点、目标和特征将部分通过下面的说明体现,部分还将通过对本发明的研究和实践而为本领域的技术人员所理解。
附图说明
图1为本发明实施例1中的掺杂锌的石墨烯相氮化碳-硫化铋异质结复合粉末的扫描电镜图;
图2为本发明实施例1掺杂锌的石墨烯相氮化碳-硫化铋/高分子复合气管支架的模型示意图;
图3为无光照处理条件下,本发明实施例1掺杂锌的石墨烯相氮化碳-硫化铋/高分子复合气管支架的抗菌效果图;
图4为有光照处理条件下,本发明实施例1掺杂锌的石墨烯相氮化碳-硫化铋/高分子复合气管支架的抗菌效果图;
图5为使用现有的聚乳酸气管支架进行促软骨再生试验的结果示意图;
图6为使用本实施例制备得到的掺杂锌的石墨烯相氮化碳-硫化铋/高分子复合气管支架进行促软骨再生试验的结果示意图。
具体实施方式
下面结合附图对本发明做进一步的详细说明,以令本领域技术人员参照说明书文字能够据以实施。
应当理解,本文所使用的诸如“具有”、“包含”以及“包括”术语并不排除一个或多个其它元件或其组合的存在或添加。
实施例1
本实施例提供了一种掺杂锌的石墨烯相氮化碳-硫化铋/高分子复合气管支架的制备方法,包括以下步骤:
步骤一、首先,将10g硫脲溶解在100mL去离子水中,得到硫脲溶液,随后向硫脲溶液中加入4g硝酸铋;在60℃下搅拌10min;随后,将产物转移到高压釜中,在180℃下保温第20h,洗涤干燥后获得硫化铋纳米棒;
步骤二、将三聚氰胺放置在马弗炉中从室温升温到550℃并保温4h,得到块体后研磨成粉末,然后将粉末在550℃下继续持续保温4h,最后得到类石墨烯相氮化碳纳米片;
步骤三、称取1g制备好的类石墨烯相氮化碳纳米片溶解在30mL去离子水中,并超声处理30min;随后添加醋酸锌0.8g,并在80℃下搅拌至液体完全挥发;然后将所得产物干燥,将产物放置在马弗炉中在550℃下保温4h,最后得到掺杂锌的类石墨烯相氮化碳纳米片;
步骤四、分别称取1g掺杂锌的类石墨烯相氮化碳纳米片和0.5g硫化铋纳米棒加入到盛有30mL乙醇和30mL水的烧杯中,通过超声分散将硫化铋附着在掺杂锌的类石墨烯相氮化碳纳米片上,然后将混合溶液离心干燥6h,得到掺杂锌的掺杂锌的石墨烯相氮化碳-硫化铋异质结复合粉末;
步骤五、称取0.02g掺杂锌的掺杂锌的石墨烯相氮化碳-硫化铋异质结复合粉末和0.98g粒径为40~60μm的聚乳酸粉质量比为,并加入到盛有30mL无水乙醇的烧杯中,通过超声分散30min实现均匀分散,然后将混合溶液离心干燥,得到掺杂锌的类石墨烯相氮化碳-硫化铋/高分子复合粉末;
步骤六、将所述掺杂锌的类石墨烯相氮化碳-硫化铋/高分子复合粉末置于选择性激光烧结系统中,根据预先建立的三维模型进行层层烧结,激光功率为3W,扫描速度为100mm/s,扫描间距为0.08mm,光斑直径为0.3mm,掺杂锌的类石墨烯相氮化碳-硫化铋/高分子复合粉末对应的粉层厚度为0.1mm,对应的粉床预热温度为140℃,烧结完成后去除未烧结粉末,即得到掺杂锌的石墨烯相氮化碳-硫化铋/高分子复合气管支架。
本实施例制备掺杂锌的石墨烯相氮化碳-硫化铋/高分子复合气管支架过程中,得到的掺杂锌的石墨烯相氮化碳-硫化铋异质结复合粉末扫描电镜图如图1所示,从图中可以看出,硫化铋很好地附着在掺杂锌的石墨烯相氮化碳纳米片表面且具有很好的整体形貌,石墨烯相氮化碳-硫化铋异质结复合粉末制备成功;图2所示为本实施例制备得到的掺杂锌的石墨烯相氮化碳-硫化铋/高分子复合气管支架的模型示意图。图3和图4为使用本实施例制备得到的掺杂锌的石墨烯相氮化碳-硫化铋/高分子复合气管支架进行抗菌实验的结果示意图,抗菌实验具体步骤为:将掺杂锌的石墨烯相氮化碳-硫化铋/高分子复合气管支架浸泡在一定量的浓度为1x107CUF/m的细菌溶液中培养24h,用近红外光照射15min后,收集1μL细菌溶液稀释到1mL,再从中取100μL细菌溶液,进行铺板。其中,图3表示没有光照处理的抗菌实验结果,图4表示有光照处理的抗菌实验结果,从图3和图4的对比可以看出,在光照条件下,本实施例制备得到的掺杂锌的石墨烯相氮化碳-硫化铋/高分子复合气管支架具有很好的抗菌实验效果,经过计算抗菌率可达98.5%。
图5为使用现有的聚乳酸气管支架进行促软骨再生试验的结果示意图,图6为使用本实施例制备得到的掺杂锌的石墨烯相氮化碳-硫化铋/高分子复合气管支架进行促软骨再生试验的结果示意图,促软骨再生试验具体步骤为:分别将聚乳酸气管支架和掺杂锌的石墨烯相氮化碳-硫化铋/高分子复合气管支架浸泡在血清培养液中,浸泡一天,气管支架降解,释放离子,得到浓度为0.2g/ml的各自浸提液;将6×103个小鼠骨髓间充质干细胞在48孔板中培养,培养1天后,用不同的浸提液替代小鼠软骨细胞诱导分化试剂盒的培养基。每隔一天,将每个孔中的浸提液替换成新的浸提液,培养7天,用4%多聚甲醛在室温下固定细胞30min,然后用PBS轻轻洗涤三次。加入100uL阿利新蓝8GX溶液,室温避光孵育30min,最后在荧光显微镜下观察染色图像。从图5和图6可以看出,图6的染色区域远远多于图5,说明本实施例制备的掺杂锌的石墨烯相氮化碳-硫化铋/高分子复合气管支架浸提液诱导再生的软骨远远多于聚乳酸气管支架浸提液诱导再生的软骨,即本实施例制备的掺杂锌的石墨烯相氮化碳-硫化铋/高分子复合气管支架具有优于聚乳酸气管支架的促软骨再生能力。
实施例2
本实施例提供了一种掺杂锌的石墨烯相氮化碳-硫化铋/高分子复合气管支架的制备方法,包括以下步骤:
步骤一、首先,将10g硫脲溶解在100mL去离子水中,得到硫脲溶液,随后向硫脲溶液中加入4g硝酸铋;在60℃下搅拌10min;随后,将产物转移到高压釜中,在180℃下保温第20h,洗涤干燥后获得硫化铋纳米棒;
步骤二、将三聚氰胺放置在马弗炉中从室温升温到550℃并保温4h,得到块体后研磨成粉末,然后将粉末在550℃下继续持续保温4h,最后得到类石墨烯相氮化碳纳米片;
步骤三、称取1g制备好的类石墨烯相氮化碳纳米片溶解在30mL去离子水中,并超声处理30min;随后添加0.8g醋酸锌,并在80℃下搅拌至液体完全挥发;然后将所得产物干燥,将产物放置在马弗炉中在550℃下保温4h,最后得到掺杂锌的类石墨烯相氮化碳纳米片;
步骤四、分别称取1g掺杂锌的类石墨烯相氮化碳纳米片和0.5g硫化铋纳米棒加入到盛有30mL乙醇和30mL水的烧杯中,通过超声分散将硫化铋附着在掺杂锌的类石墨烯相氮化碳纳米片上,然后将混合溶液离心干燥6h,得到掺杂锌的掺杂锌的石墨烯相氮化碳-硫化铋异质结复合粉末;
步骤五、分别称取0.05g掺杂锌的掺杂锌的石墨烯相氮化碳-硫化铋异质结复合粉末和0.95g粒径为40~60μm的聚乳酸粉末,并加入到盛有30mL无水乙醇的烧杯中,通过超声分散30min实现均匀分散,然后将混合溶液离心干燥,得到掺杂锌的类石墨烯相氮化碳-硫化铋/高分子复合粉末;
步骤六、将所述掺杂锌的类石墨烯相氮化碳-硫化铋/高分子复合粉末置于选择性激光烧结系统中,根据预先建立的三维模型进行层层烧结,激光功率为5W,扫描速度为200mm/s,扫描间距为0.10mm,光斑直径为0.6mm,掺杂锌的类石墨烯相氮化碳-硫化铋/高分子复合粉末对应的粉层厚度为0.1mm,对应的粉床预热温度为150℃,烧结完成后去除未烧结粉末,即得到掺杂锌的石墨烯相氮化碳-硫化铋/高分子复合气管支架。
实施例3
本实施例提供了一种掺杂锌的石墨烯相氮化碳-硫化铋/高分子复合气管支架的制备方法,包括以下步骤:
步骤一、首先,将10g硫脲溶解在100mL去离子水中,得到硫脲溶液,随后向硫脲溶液中加入4g硝酸铋;在60℃下搅拌10min;随后,将产物转移到高压釜中,在180℃下保温第20h,洗涤干燥后获得硫化铋纳米棒;
步骤二、将三聚氰胺放置在马弗炉中从室温升温到550℃并保温4h,得到块体后研磨成粉末,然后将粉末在550℃下继续持续保温4h,最后得到类石墨烯相氮化碳纳米片;
步骤三、称取1g制备好的类石墨烯相氮化碳纳米片溶解在30mL去离子水中,并超声处理30min;随后添加0.8g醋酸锌,并在80℃下搅拌至液体完全挥发;然后将所得产物干燥,将产物放置在马弗炉中在550℃下保温4h,最后得到掺杂锌的类石墨烯相氮化碳纳米片;
步骤四、分别称取1g掺杂锌的类石墨烯相氮化碳纳米片和0.5g硫化铋纳米棒加入到盛有30mL乙醇和30mL水的烧杯中,通过超声分散将硫化铋附着在掺杂锌的类石墨烯相氮化碳纳米片上,然后将混合溶液离心干燥6h,得到掺杂锌的掺杂锌的石墨烯相氮化碳-硫化铋异质结复合粉末;
步骤五、分别称取0.10g掺杂锌的掺杂锌的石墨烯相氮化碳-硫化铋异质结复合粉末和0.9g粒径为40~60μm的聚乳酸粉末,并加入到盛有30mL无水乙醇的烧杯中,通过超声分散30min实现均匀分散,然后将混合溶液离心干燥,得到掺杂锌的类石墨烯相氮化碳-硫化铋/高分子复合粉末;
步骤六、将所述掺杂锌的类石墨烯相氮化碳-硫化铋/高分子复合粉末置于选择性激光烧结系统中,根据预先建立的三维模型进行层层烧结,激光功率为6W,扫描速度为300mm/s,扫描间距为0.12mm,光斑直径为1.0mm,掺杂锌的类石墨烯相氮化碳-硫化铋/高分子复合粉末对应的粉层厚度为0.1mm,对应的粉床预热温度为160℃,烧结完成后去除未烧结粉末,即得到掺杂锌的石墨烯相氮化碳-硫化铋/高分子复合气管支架。
这里说明的设备数量和处理规模是用来简化本发明的说明的。对本发明的应用、修改和变化对本领域的技术人员来说是显而易见的。
尽管本发明的实施方案已公开如上,但其并不仅仅限于说明书和实施方式中所列运用,它完全可以被适用于各种适合本发明的领域,对于熟悉本领域的人员而言,可容易地实现另外的修改,因此在不背离权利要求及等同范围所限定的一般概念下,本发明并不限于特定的细节和这里示出与描述的图例。
Claims (1)
1.一种掺杂锌的石墨烯相氮化碳-硫化铋/高分子复合气管支架的制备方法,其特征在于,包括以下步骤:
步骤一、首先,将硫脲溶解在去离子水中,得到硫脲溶液,硫脲与去离子水的质量体积比为1g:10mL,随后向硫脲溶液中加入硝酸铋,硫脲与硝酸铋的质量比为5:2;在第一温度下搅拌第一预设时间;随后,将产物转移到高压釜中,在第二温度下保温第二预设时间,洗涤干燥后获得硫化铋纳米棒;
步骤二、将三聚氰胺放置在马弗炉中从室温升温到第三温度并保温第三预设时间,得到块体后研磨成粉末,然后将粉末在第三温度下继续持续第三预设时间,最后得到类石墨烯相氮化碳纳米片;
步骤三、将制备好的类石墨烯相氮化碳纳米片溶解在去离子水中,类石墨烯相氮化碳纳米片和去离子水的质量体积比为1g:30mL,并超声处理第四预设时间;随后按照类石墨烯相氮化碳纳米片与醋酸锌为第一质量比添加醋酸锌,并在第四温度下搅拌至液体完全挥发;然后将所得产物干燥,将产物放置在马弗炉中在第三温度下保温第三预设时间,最后得到掺杂锌的类石墨烯相氮化碳纳米片;
步骤四、按照第二预设质量比,称取一定量的掺杂锌的类石墨烯相氮化碳纳米片和硫化铋纳米棒加入到盛有乙醇和水的烧杯中,通过超声分散将硫化铋附着在掺杂锌的类石墨烯相氮化碳纳米片上,然后将混合溶液离心干燥第五预设时间,得到掺杂锌的掺杂锌的石墨烯相氮化碳-硫化铋异质结复合粉末;
步骤五、按照第四预设质量比,称取一定量的掺杂锌的石墨烯相氮化碳-硫化铋异质结复合粉末和高分子粉末并加入到盛有无水乙醇的烧杯中,通过超声分散第四预设时间实现均匀分散,然后将混合溶液离心干燥,得到掺杂锌的类石墨烯相氮化碳-硫化铋/高分子复合粉末;其中所述高分子为聚乳酸、聚乙醇酸、聚乳酸-羟基乙醇酸共聚物、聚对二氧环已酮中的至少一种;
步骤六、将所述掺杂锌的类石墨烯相氮化碳-硫化铋/高分子复合粉末置于选择性激光烧结系统中,根据预先建立的三维模型进行层层烧结,烧结完成后去除未烧结粉末,即得到掺杂锌的石墨烯相氮化碳-硫化铋/高分子复合气管支架;
掺杂锌的石墨烯相氮化碳-硫化铋异质结复合粉末的质量分数为2~10wt%,高分子的质量分数为90~98wt%,所述高分子的粒径为40~60μm,所述掺杂锌的石墨烯相氮化碳-硫化铋异质结复合粉末的粒径为1~4μm;
所述步骤二和步骤三中,所述第三温度为550℃,第三预设时间为4h;
所述步骤三中,所述第四预设时间为30min,第一质量比为1:0.8,第四温度为80℃;
所述步骤六中,在激光烧结过程中,激光功率为3~6W,扫描速度为100~300mm/s,扫描间距为0.08~0.12mm,光斑直径为0.3~1.0mm,所述掺杂锌的类石墨烯相氮化碳-硫化铋/高分子复合粉末对应的粉层厚度为0.1mm,对应的粉床预热温度为140~160℃;
所述步骤一中,所述第一温度为60℃,所述第一预设时间为10min;第二温度为180℃,第二预设时间为20h;
所述步骤四中,所述第二预设质量比为2:1,掺杂锌的类石墨烯相氮化碳纳米片、乙醇和水的质量体积比为1g:30mL:30mL,第五预设时间为6h;
所述步骤五中,所述第四预设的质量比为2~10:90~98,每1g总质量的掺杂锌的石墨烯相氮化碳-硫化铋异质结复合粉末和高分子粉末对应30mL无水乙醇;
所述石墨烯相氮化碳-硫化铋/高分子复合气管支架应用于新型气管植入材料。
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