CN105820587A - 一种改性医用弹性体及其制备方法 - Google Patents
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Abstract
本发明提供一种改性医用弹性体及其制备方法,该弹性体包括如下组分:鲑鱼胶原,细菌纤维素,聚乙烯醇,羧甲基纤维素钠,邻苯二甲酸二丁酯,交联剂,稳定剂,抗菌剂及粘合剂。制备方法:按重量份称取各组分;将鲑鱼胶原和细菌纤维素加入反应釜中,搅拌均匀,在氮气气氛中,加热反应,抽滤,水洗,真空干燥,得到鲑鱼胶原改性细菌纤维素粉体;将鲑鱼胶原改性细菌纤维素粉体溶解于去离子水中,超声,加入聚乙烯醇、羧甲基纤维素钠、邻苯二甲酸二丁酯、交联剂、稳定剂、抗菌剂及粘合剂,继续搅拌,抽真空脱泡;将产物浇注在模具中,冷冻,室温静置,即得。本发明的改性医用弹性体具有生物相容性,吸水性、透气性、保湿性均较高,有利于伤口愈合。
Description
技术领域
本发明涉及医用弹性体领域,具体涉及一种改性医用弹性体及其制备方法。
背景技术
近年来各国老龄化问题日趋严重,糖尿病、肥胖症等发病率持续增长,老年群体多发的褥疮、难愈性溃疡等慢性伤口护理需求日益增加,医用弹性体市场具有较大增长空间。对伤口愈合的研究表明,使用弹性体的目的不止是覆盖创面,还具有促进伤口愈合的作用。根据“湿润伤口愈合”理论,伤口在湿润的环境中愈合的更快。
目前,已经有国内和国外厂家开发出外用的胶原海绵成品。但以胶原为单一成分的海绵材料存在许多缺陷,而通过添加其它成分,如壳聚糖等制作复合胶原海绵,可以大大改善上述缺陷。
发明内容
发明目的:本发明的发明目的在于提供一种改性医用弹性体及其制备方法,通过对细菌纤维素进行胶原改性,并将具有超高生物相容性的聚乙烯醇、羧甲基纤维素钠与邻苯二甲酸二丁酯与改性后的细菌纤维素复合,从而制得了一种具有较高断裂伸长率、吸水性和保湿型的改性医用弹性体,且制备方法简单,成本低廉,易于产业化。
本发明的技术方案:
一种改性医用弹性体,按重量份计,包括如下组分:鲑鱼胶原5~15份,细菌纤维素5~15份,聚乙烯醇10~20份,羧甲基纤维素钠5~15份,邻苯二甲酸二丁酯1~5份,交联剂1~5份,稳定剂1~3份,抗菌剂1~3份及粘合剂2~8份。
所述交联剂为香草醛。
所述稳定剂为柠檬酸。
所述抗菌剂为纳米氧化锌、纳米银或二氧化钛中的一种。
所述粘合剂为淀粉。
一种改性医用弹性体的制备方法,包括如下步骤:
(1)按重量份称取各组分;
(2)将鲑鱼胶原和细菌纤维素加入反应釜中,搅拌均匀,在氮气气氛中,加热至50~60℃,反应10~20h,反应完全后,抽滤,水洗,于真空干燥箱中干燥12~24h,得到鲑鱼胶原改性细菌纤维素粉体;
(3)将步骤(2)制得的鲑鱼胶原改性细菌纤维素粉体溶解于去离子水中,超声20~30min,加入聚乙烯醇、羧甲基纤维素钠、邻苯二甲酸二丁酯、交联剂、稳定剂、抗菌剂及粘合剂,继续搅拌30~60min,抽真空脱泡;
(4)将步骤(3)所得产物浇注在模具中,然后在-5~-10℃冷冻12~24h,再在室温静置24~48h,即得改性医用弹性体。
有益效果:
与现有技术相比:
(1)本发明的改性医用弹性体具有生物相容性,促进创面愈合;
(2)本发明的改性医用弹性体吸水性、透气性、保湿性均较高,有利于伤口愈合;
(3)本发明的的制备方法工艺简单,对设备没有过高要求,原料价低易得,成本低廉,易于实现产业化。
具体实施方式
以下对本发明的具体实施方式进行详细说明。
实施例1
一种改性医用弹性体,按重量份计,包括如下组分:鲑鱼胶原5份,细菌纤维素5份,聚乙烯醇10份,羧甲基纤维素钠5份,邻苯二甲酸二丁酯1份,交联剂1份,稳定剂1份,纳米氧化锌1份及粘合剂2份。
制备方法如下:
(1)按重量份称取各组分;
(2)将鲑鱼胶原和细菌纤维素加入反应釜中,搅拌均匀,在氮气气氛中,加热至50℃,反应20h,反应完全后,抽滤,水洗,于真空干燥箱中干燥12h,得到鲑鱼胶原改性细菌纤维素粉体;
(3)将步骤(2)制得的鲑鱼胶原改性细菌纤维素粉体溶解于去离子水中,超声20min,加入聚乙烯醇、羧甲基纤维素钠、邻苯二甲酸二丁酯、交联剂、稳定剂、纳米氧化锌及粘合剂,继续搅拌30min,抽真空脱泡;
(4)将步骤(3)所得产物浇注在模具中,然后在-5℃冷冻24h,再在室温静置48h,即得改性医用弹性体。
实施例2
一种改性医用弹性体,按重量份计,包括如下组分:鲑鱼胶原8份,细菌纤维素8份,聚乙烯醇13份,羧甲基纤维素钠8份,邻苯二甲酸二丁酯2份,交联剂2份,稳定剂1份,纳米氧化锌1份及粘合剂4份。
制备方法如下:
(1)按重量份称取各组分;
(2)将鲑鱼胶原和细菌纤维素加入反应釜中,搅拌均匀,在氮气气氛中,加热至50℃,反应20h,反应完全后,抽滤,水洗,于真空干燥箱中干燥15h,得到鲑鱼胶原改性细菌纤维素粉体;
(3)将步骤(2)制得的鲑鱼胶原改性细菌纤维素粉体溶解于去离子水中,超声22min,加入聚乙烯醇、羧甲基纤维素钠、邻苯二甲酸二丁酯、交联剂、稳定剂、纳米氧化锌及粘合剂,继续搅拌40min,抽真空脱泡;
(4)将步骤(3)所得产物浇注在模具中,然后在-6℃冷冻24h,再在室温静置42h,即得改性医用弹性体。
实施例3
一种改性医用弹性体,按重量份计,包括如下组分:鲑鱼胶原10份,细菌纤维素10份,聚乙烯醇15份,羧甲基纤维素钠10份,邻苯二甲酸二丁酯3份,交联剂3份,稳定剂2份,纳米银2份及粘合剂4份。
制备方法如下:
(1)按重量份称取各组分;
(2)将鲑鱼胶原和细菌纤维素加入反应釜中,搅拌均匀,在氮气气氛中,加热至55℃,反应15h,反应完全后,抽滤,水洗,于真空干燥箱中干燥18h,得到鲑鱼胶原改性细菌纤维素粉体;
(3)将步骤(2)制得的鲑鱼胶原改性细菌纤维素粉体溶解于去离子水中,超声25min,加入聚乙烯醇、羧甲基纤维素钠、邻苯二甲酸二丁酯、交联剂、稳定剂、纳米银及粘合剂,继续搅拌40min,抽真空脱泡;
(4)将步骤(3)所得产物浇注在模具中,然后在-7℃冷冻20h,再在室温静置36h,即得改性医用弹性体。
实施例4
一种改性医用弹性体,按重量份计,包括如下组分:鲑鱼胶原12份,细菌纤维素12份,聚乙烯醇18份,羧甲基纤维素钠12份,邻苯二甲酸二丁酯4份,交联剂4份,稳定剂3份,纳米银3份及粘合剂6份。
制备方法如下:
(1)按重量份称取各组分;
(2)将鲑鱼胶原和细菌纤维素加入反应釜中,搅拌均匀,在氮气气氛中,加热至55℃,反应10h,反应完全后,抽滤,水洗,于真空干燥箱中干燥22h,得到鲑鱼胶原改性细菌纤维素粉体;
(3)将步骤(2)制得的鲑鱼胶原改性细菌纤维素粉体溶解于去离子水中,超声28min,加入聚乙烯醇、羧甲基纤维素钠、邻苯二甲酸二丁酯、交联剂、稳定剂、纳米银及粘合剂,继续搅拌50min,抽真空脱泡;
(4)将步骤(3)所得产物浇注在模具中,然后在-8℃冷冻16h,再在室温静置30h,即得改性医用弹性体。
实施例5
一种改性医用弹性体,按重量份计,包括如下组分:鲑鱼胶原15份,细菌纤维素15份,聚乙烯醇20份,羧甲基纤维素钠15份,邻苯二甲酸二丁酯5份,交联剂5份,稳定剂3份,二氧化钛3份及粘合剂8份。
制备方法如下:
(1)按重量份称取各组分;
(2)将鲑鱼胶原和细菌纤维素加入反应釜中,搅拌均匀,在氮气气氛中,加热至60℃,反应10h,反应完全后,抽滤,水洗,于真空干燥箱中干燥24h,得到鲑鱼胶原改性细菌纤维素粉体;
(3)将步骤(2)制得的鲑鱼胶原改性细菌纤维素粉体溶解于去离子水中,超声30min,加入聚乙烯醇、羧甲基纤维素钠、邻苯二甲酸二丁酯、交联剂、稳定剂、二氧化钛及粘合剂,继续搅拌60min,抽真空脱泡;
(4)将步骤(3)所得产物浇注在模具中,然后在-10℃冷冻12h,再在室温静置24h,即得改性医用弹性体。
性能测试:
分别测定本发明实施例1~5制备的改性医用弹性体的物理性能,包括断裂伸长率、孔隙率、相对保湿性和透气率,结果如表1所示。
断裂伸长率的测试方法:根据GB/T14344-2008《长丝拉伸性能试验方法》标准测试。
孔隙率的测定方法如下:将一定质量的海绵置于体积为V1的乙醇中,脱泡,海绵和乙醇的总体积记为V2,则(V2-V1)即为海绵的体积。将含乙醇的海绵取出,所剩乙醇体积为V3,则海绵中所含乙醇的体积(V1-V3)为海绵空隙所占的体积,海绵的总体积为V=(V2-V1)+(V1-V3)=V2-V3。孔隙率=(V1-V3)/(V2-V3)。
相对保湿性的测定方法如下:将待测材料剪成2cm×2cm的样品,精密称定质量W1,浸泡于去离子水50mL中使其吸水达平衡,用滤纸吸去表面水分,精密称定质量W2,然后取出在500r/min的转速下离心3min,精密称定质量W3,计算保湿率,计算公式为:相对保湿性=(W3-W1)/(W2-W1)×100%。
透气率的测定方法如下:广口瓶内装一定量的蒸馏水,用待测材料密封瓶口,室温放置24h,计算透气率,计算公式为:透气率=24h失水量/对照组失水量×100%。
表1实施例1~5制备的医用弹性体的物理性能
项目 | 实施例1 | 实施例2 | 实施例3 | 实施例4 | 实施例5 |
断裂伸长率(%) | 186 | 189 | 192 | 190 | 187 |
孔隙率(%) | 72.05 | 74.07 | 76.18 | 75.01 | 73.54 |
相对保湿性(%) | 2.8 | 2.9 | 3.4 | 3.1 | 2.8 |
透气率(%) | 41.8 | 42.1 | 43.8 | 42.5 | 41.9 |
由表1可知,本发明的改性医用弹性体断裂伸长率、透气性、保湿性均较高,有利于伤口愈合,能够满足医用弹性体的要求。
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。
Claims (6)
1.一种改性医用弹性体,其特征在于,按重量份计,包括如下组分:鲑鱼胶原5~15份,细菌纤维素5~15份,聚乙烯醇10~20份,羧甲基纤维素钠5~15份,邻苯二甲酸二丁酯1~5份,交联剂1~5份,稳定剂1~3份,抗菌剂1~3份及粘合剂2~8份。
2.根据权利要求1所述的改性医用弹性体,其特征在于,所述交联剂为香草醛。
3.根据权利要求1所述的改性医用弹性体,其特征在于,所述稳定剂为柠檬酸。
4.根据权利要求1所述的改性医用弹性体,其特征在于,所述抗菌剂为纳米氧化锌、纳米银或二氧化钛中的一种。
5.根据权利要求1所述的改性医用弹性体,其特征在于,所述粘合剂为淀粉。
6.一种权利要求1所述改性医用弹性体的制备方法,其特征在于,包括如下步骤:
(1)按重量份称取各组分;
(2)将鲑鱼胶原和细菌纤维素加入反应釜中,搅拌均匀,在氮气气氛中,加热至50~60℃,反应10~20h,反应完全后,抽滤,水洗,于真空干燥箱中干燥12~24h,得到鲑鱼胶原改性细菌纤维素粉体;
(3)将步骤(2)制得的鲑鱼胶原改性细菌纤维素粉体溶解于去离子水中,超声20~30min,加入聚乙烯醇、羧甲基纤维素钠、邻苯二甲酸二丁酯、交联剂、稳定剂、抗菌剂及粘合剂,继续搅拌30~60min,抽真空脱泡;
(4)将步骤(3)所得产物浇注在模具中,然后在-5~-10℃冷冻12~24h,再在室温静置24~48h,即得改性医用弹性体。
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