CN107232230A - 一种多元离子抗菌活性炭及其制备方法 - Google Patents
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Abstract
本发明涉及抗菌材料领域,公开了一种多元离子抗菌活性炭,包括以下原料制备而成:活性炭、二氧化硅粉体、AgNO3、TiO2、Cu、Zn、Mg和去离子水;其中,所述AgNO3、TiO2、Cu、Zn、Mg的质量分别为活性炭质量的2.9‑5.3%加上二氧化硅粉体总质量的1/3‑2/3。本发明的多元离子抗菌活性炭利用离子抗菌原理和微磁电场技术原理,形成了一种新型抗菌添加材料,能够有效地提高抗菌性能和使用寿命,避免了传统抗菌材料的抗菌性低下、使用寿命低和温度依赖性太强等问题。
Description
技术领域
本发明涉及抗菌材料领域,尤其涉及一种多元离子抗菌活性炭及其制备方法。
背景技术
活性炭是一种重要滤材,广泛应用于水质与空气净化领域。为方便使用,通常将活性炭粉与黏结剂混合,并加热成形为一种抗压强度良好的棒材。所述活性炭棒的形成方法可区分为挤出法与烧结法。
挤出法采用单螺杆挤出机将混合的活性炭粉与黏结剂喂入挤出机,通常活性炭粉占70%至95%,以160-185℃加工温度挤出,成管状,冷却后进行切割,即得活性炭棒。
烧结法则将混合的活性炭粉与黏结剂倒入金属模具内,置入烧结炉以220-300℃温度烧结20至60分钟,然后取出模具,冷却后打开模具,即得活性炭棒。烧结法所得之活性炭棒,其活性炭粉被黏结剂熔化堵塞较少。
然而活性炭在水处理时,在吸附大量有毒有害污染物同时,活性炭吸附了大量有机污染物,此时微生物极易繁殖,从而繁殖大量的细菌,因此,通常在炭棒中载银制备抗菌活性炭棒,以达到抗菌效果。现有技术中,抗菌活性炭棒的制备方法通常有以下几种:
一,挤出法,即在利用挤出法成型炭棒的过程中加入复合抗菌剂粉末,将活性炭粉、黏结剂与抗菌粉挤出形成载银活性炭,抗菌粉通常为银粉,其缺陷在于,所述复合抗菌剂在挤出成型后,被黏结剂所包覆,复合抗菌剂难以析出,抗菌效果较差。
二,烧结法,即在利用烧结法成型炭棒的过程中加入复合抗菌剂粉末,活性炭粉、黏结剂与抗菌粉烧结形成载银活性炭,抗菌粉通常为银粉,其缺陷在于,所述复合抗菌剂粉末较细小,使得与黏结剂的结合率较差,复合抗菌剂粉末大量析出,使得水中复合抗菌剂严重超标,而炭棒很快失去抗菌效果。
三,包覆法,即在活性炭棒外层包覆一层载银无纺布,其缺陷在于,载银无纺布中的阴离子大量析出,溶于水中,使得水溶液中银离子浓度超标,而炭棒很快失去抗菌效果。
发明内容
为了解决上述技术问题,本发明提供了一种多元离子抗菌活性炭及其制备方法。本发明制得的多元离子抗菌活性炭能够克服上述缺点,本发明的多元离子抗菌活性炭利用离子抗菌原理和微磁电场技术原理,形成了一种新型抗菌添加材料,能够有效地提高抗菌性能和使用寿命,避免了传统抗菌材料的抗菌性低下、使用寿命低和温度依赖性太强等问题。
为了实现上述目的,本发明采用以下技术方案:
一种多元离子抗菌活性炭,包括以下原料制备而成:活性炭、二氧化硅粉体、AgNO3、TiO2、Cu、Zn、Mg和去离子水;其中,所述AgNO3、TiO2、Cu、Zn、Mg的质量分别为活性炭质量的2.9-5.3%加上二氧化硅粉体总质量的1/3-2/3。
在本技术方案中,本发明的多元离子抗菌活性炭利用离子抗菌原理和微磁电场技术原理,形成了一种新型高效抗菌添加材料。有效地提高了抗菌性能和使用寿命,避免了传统抗菌材料的抗菌性低下、使用寿命低和温度依赖性太强等问题。其优点具体为:
(1)多元离子抗菌活性炭通过离子抗菌的方法来提高抗菌能力。通过离子抗菌的手段,吸附交换各种离子,使抗菌性达到最活跃的状态。添加各种对人体无害的离子来使抗菌性能提高。
(2)多元离子抗菌活性炭可以有效干扰细胞壁的合成。细菌细胞壁重要组分为肽聚糖,离子抗菌剂对细胞壁的干扰作用,主要抑制多糖链与四肽交联有连结,从而使细胞壁失去完整性,失去了对渗透压的保护作用,损害菌体而死亡。
多元离子抗菌活性炭可损伤细胞膜。细胞膜是细菌细胞生命活动重要的组成部分。因此,如细胞膜受损伤、破坏,将导致细菌死亡。
多元离子抗菌活性炭能够抑制蛋白质的合成。蛋白质的合成过程变更、停止、使细菌死亡。蛋白质对于细菌来说是物质基础,是有机大分子,是构成细胞的基本有机物,是生命活动的主要承担者。没有蛋白质就没有生命,而离子交换法破环了蛋白质的合成过程,使整个过程变更或者停止,这样细菌就停止生长或者死亡。
(3)添加有多元离子抗菌活性炭的使用寿命长。抗菌剂的使用寿命一般和抗氧化直接相关,抗氧化能力越好,使用寿命就越长;反之则相反。而多元离子抗菌活性炭的抗氧化加强是通过离子抗菌的技术来实现的,加强了耐氧化性,会让其在一定时间内保持其固有的属性,不被氧化,延长其使用寿命。而且离子交换可以加入抗氧化的离子,使材料隔绝氧气,提升材料的抗氧化,增加使用寿命。所以对比于其他的材料,添加有多元离子抗菌活性炭的材料使用寿命会比较长。
本发明通过磁场加强了复合金属离子的电离活性和强度,有效地提高了抗菌灭菌性能,有效地防止细菌的滋生。本发明的多元离子抗菌活性炭可用于制成滤芯,用于净水中;可用作添加剂添加进瓷砖中,可作为添加剂添加进涂料中,用途广泛。
作为优选,二氧化硅粒径为200-400目,占活性炭总质量的2.9-5.3%的活性炭的粒径为200-400目,剩余活性炭直径为5-10mm。
作为优选,占活性炭总质量的94.7-97.1%的活性炭先经过活化,活化工艺为:将直径为5-10mm的活性炭放置于活化炉内,升温至800-900℃,保温45min,然后继续升温至1200-1350℃,保温15-20min。
一种多元离子抗菌活性炭的制备方法,所述制备方法包括以下步骤:
a)各称取15-28份粒径200-400目的活性炭与二氧化硅粉体,加入到180-240份去离子水中配制成悬浮液A,以180-220r/min搅拌22-32min;
b)分别称取占活性炭与活性炭与二氧化硅粉体总质量的1/3-2/3的AgNO3、Cu粉、Zn粉、Mg粉,加入去离子水配成55-65份的悬浮液B,加热升温至80-90℃,搅拌45-50min,然后将悬浮液B以20-30滴/min的速度加入到步骤a)制得的悬浮液A中,制得悬浮液C;再称取TiO2,用去离子水配置成45-60份溶液,再按5-15滴/min的速度滴入悬浮液C中,制得悬浮液D;
c)称取480-510份直径5-10mm的活性炭进行活化,升温至800-900℃,保温45min,然后继续升温至1200-1350℃,保温15-20min;将活化后的活性炭浸入步骤b)制得的悬浮液D中,浸泡时间10-12h,然后放入烘箱内烘干,制得多元离子抗菌活性炭。在本技术方案中,在高温下C与氧气发生氧化还原进行活化,通过C的气体反应(烧失)达到碳粒中造碳的目的。其主要化学反应工如下:(氧气充足时):C+O2=CO2,若氧气不足:2C+O2=2CO,C+CO2=2CO。多元离子抗菌活性炭与普通活性炭的区别:普通活性炭不具有抗菌能力,多元离子抗菌活性炭吸附能力强,能去味,去臭,有效抑菌、抗菌。
作为优选,步骤b)中悬浮液B的搅拌速度为600-800r/min。
作为优选,步骤b)中将悬浮液B以25-28滴/min的速度加入到步骤a)制得的悬浮液A中。
作为优选,步骤c)中烘箱的温度为60-80℃。
与现有技术对比,本发明的有益效果是:
本发明的多元离子抗菌活性炭利用离子抗菌原理和微磁电场技术原理,形成了一种新型抗菌添加材料,能够有效地提高抗菌性能和使用寿命,避免了传统抗菌材料的抗菌性低下、使用寿命低和温度依赖性太强等问题。
具体实施方式
为使本领域技术人员更好地理解本发明的技术方案,但这些阐述并不对本发明做任何形式上的限定。除另有说明,否则本发明所用的所有科学和技术术语具有本发明所属和相关领域的一般技术人员通常所理解的含义。
下面结合具体实施例对本发明做出进一步详细的阐述,但应当明白,实施例不应理解为对本发明保护范围的限制。
实施例1
一种多元离子抗菌活性炭,包括以下原料制备而成:活性炭、二氧化硅粉体、AgNO3、TiO2、Cu、Zn、Mg和去离子水;
一种多元离子抗菌活性炭的制备方法,所述制备方法包括以下步骤:
a)各称取15份粒径为200-400目的活性炭与二氧化硅粉体,加入到180份去离子水中配制成悬浮液A,以180r/min搅拌22min;
b)分别称取占活性炭与活性炭与二氧化硅粉体总质量的1/3的AgNO3、Cu粉、Zn粉、Mg粉,加入去离子水配成55份的悬浮液B,加热升温至80℃,搅拌45min,搅拌速度为600r/min;然后将悬浮液B以25滴/min的速度加入到步骤a)制得的悬浮液A中,制得悬浮液C;再称取TiO2,TiO2的用量与AgNO3相同,用去离子水配置成45份溶液,再按5滴/min的速度滴入悬浮液C中,制得悬浮液D;
c)称取480份直径5-10mm的活性炭进行活化,升温至800℃,保温45min,然后继续升温至1200℃,保温15min;将活化后的活性炭浸入步骤b)制得的悬浮液D中,浸泡时间10h,然后放入烘箱内烘干,烘箱的温度为60℃,制得多元离子抗菌活性炭。
实施例2
一种多元离子抗菌活性炭,包括以下原料制备而成:活性炭、二氧化硅粉体、AgNO3、TiO2、Cu、Zn、Mg和去离子水;
一种多元离子抗菌活性炭的制备方法,所述制备方法包括以下步骤:
a)各称取20份粒径为200-400目的活性炭与二氧化硅粉体,加入到200份去离子水中配制成悬浮液A,以200r/min搅拌25min;
b)分别称取占活性炭与活性炭与二氧化硅粉体总质量的1/2的AgNO3、Cu粉、Zn粉、Mg粉,加入去离子水配成60份的悬浮液B,加热升温至85℃,搅拌48min,搅拌速度为700r/min;然后将悬浮液B以26滴/min的速度加入到步骤a)制得的悬浮液A中,制得悬浮液C;再称取TiO2,TiO2的用量与AgNO3,相同用去离子水配置成50份溶液,再按10滴/min的速度滴入悬浮液C中,制得悬浮液D;
c)称取500份直径5-10mm的活性炭进行活化,升温至855℃,保温45min,然后继续升温至1250℃,保温18min;将活化后的活性炭浸入步骤b)制得的悬浮液D中,浸泡时间11h,然后放入烘箱内烘干,烘箱的温度为65℃,制得多元离子抗菌活性炭。
实施例3
一种多元离子抗菌活性炭,包括以下原料制备而成:活性炭、二氧化硅粉体、AgNO3、TiO2、Cu、Zn、Mg和去离子水;
一种多元离子抗菌活性炭的制备方法,所述制备方法包括以下步骤:
a)各称取28份粒径为400目的活性炭与二氧化硅粉体,加入到240份去离子水中配制成悬浮液A,以220r/min搅拌32min;
b)分别称取占活性炭与活性炭与二氧化硅粉体总质量的2/3的AgNO3、Cu粉、Zn粉、Mg粉,加入去离子水配成65份的悬浮液B,加热升温至90℃,搅拌50min,搅拌速度为800r/min;然后将悬浮液B以28滴/min的速度加入到步骤a)制得的悬浮液A中,制得悬浮液C;再称取TiO2,TiO2的用量与AgNO3,用去离子水配置成60份溶液,再按15滴/min的速度滴入悬浮液C中,制得悬浮液D;
c)称取510份直径5-10mm的活性炭进行活化,升温至900℃,保温45min,然后继续升温至1350℃,保温20min;将活化后的活性炭浸入步骤b)制得的悬浮液D中,浸泡时间12h,然后放入烘箱内烘干,烘箱的温度为80℃,制得多元离子抗菌活性炭。
为测试本发明的抗菌剂的抗菌效果,将其添加到不同材料中的进行分析:
表1:在滤芯中的应用:
种类 | MIC(ppm) | MIC(ppm) | |
大肠杆菌 | 150 | 青霉菌 | 156 |
金黄色葡萄球菌 | 148 | 黑霉菌 | 152 |
表2:在抗菌瓷砖中的应用:
种类 | 大肠杆菌 | 金黄色葡萄球菌 | 枯草杆菌 | 肺炎杆菌 | 绿脓杆菌 |
灭菌率 | 99.9% | 99.7% | 99.9% | 99.8% | 99.9% |
本发明中所用原料、设备,若无特别说明,均为本领域的常用原料、设备;本发明中所用方法,若无特别说明,均为本领域的常规方法。
以上所述,仅是本发明的较佳实施例,并非对本发明作任何限制,凡是根据本发明技术实质对以上实施例所作的任何简单修改、变更以及等效变换,均仍属于本发明技术方案的保护范围。
Claims (7)
1.一种多元离子抗菌活性炭,其特征在于,包括以下原料制备而成:活性炭、二氧化硅粉体、AgNO3、TiO2、Cu、Zn、Mg和去离子水;其中,所述AgNO3、TiO2、Cu、Zn、Mg的质量分别为活性炭质量的2.9-5.3%加上二氧化硅粉体总质量的1/3-2/3。
2.根据权利要求1所述的一种多元离子抗菌活性炭,其特征在于,二氧化硅粒径为200-400目,占活性炭总质量的2.9-5.3%的活性炭的粒径为200-400目,剩余活性炭直径为5-10mm。
3.根据权利要求1所述的一种多元离子抗菌活性炭,其特征在于,占活性炭总质量的94.7-97.1%的活性炭先经过活化,活化工艺为:将直径为5-10mm的活性炭放置于活化炉内,升温至800-900℃,保温45min,然后继续升温至1200-1350℃,保温15-20min。
4.一种如权利要求1所述的多元离子抗菌活性炭的制备方法,其特征在于,所述制备方法包括以下步骤:
a)各称取15-28份粒径200-400目的活性炭与二氧化硅粉体,加入到180-240份去离子水中配制成悬浮液A,以180-220r/min搅拌22-32min;
b)分别称取占活性炭与活性炭与二氧化硅粉体总质量的1/3-2/3的AgNO3、Cu粉、Zn粉、Mg粉,加入去离子水配成55-65份的悬浮液B,加热升温至80-90℃,搅拌45-50min,然后将悬浮液B以20-30滴/min的速度加入到步骤a)制得的悬浮液A中,制得悬浮液C;再称取TiO2,用去离子水配置成45-60份溶液,再按5-15滴/min的速度滴入悬浮液C中,制得悬浮液D;
c)称取480-510份粒径5-10mm的活性炭进行活化,升温至800-900℃,保温45min,然后继续升温至1200-1350℃,保温15-20min;将活化后的活性炭浸入步骤b)制得的悬浮液D中,浸泡时间10-12h,然后放入烘箱内烘干,制得多元离子抗菌活性炭。
5.根据权利要求4所述的一种多元离子抗菌活性炭的制备方法,其特征在于,步骤b)中悬浮液B的搅拌速度为600-800r/min。
6.根据权利要求4所述的一种多元离子抗菌活性炭的制备方法,其特征在于,步骤b)中将悬浮液B以25-28滴/min的速度加入到步骤a)制得的悬浮液A中。
7.根据权利要求4所述的一种多元离子抗菌活性炭的制备方法,其特征在于,步骤c)中烘箱的温度为60-80℃。
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