CN106087582A - 一种阻燃抗菌复合空气滤纸的制备方法 - Google Patents

一种阻燃抗菌复合空气滤纸的制备方法 Download PDF

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CN106087582A
CN106087582A CN201610462049.8A CN201610462049A CN106087582A CN 106087582 A CN106087582 A CN 106087582A CN 201610462049 A CN201610462049 A CN 201610462049A CN 106087582 A CN106087582 A CN 106087582A
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吴迪
宋奇
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Abstract

本发明涉及一种阻燃抗菌复合空气滤纸的制备方法,属于空气过滤材料技术领域。本发明针对目前阻燃空气滤纸中的阻燃剂阻燃效率低,加入量大,导致滤纸力学性能下降,阻燃效果不能持久,会有返卤吸潮的现象产生,造成环境污染,同时滤纸表面易黏附细菌,造成二次污染的问题,本发明通过急速冷却混合壳聚糖、淀粉,将其与正硅酸乙酯及三甲基氯硅烷进行接枝反应,以壳聚糖为抑菌物,再将反应物接枝淀粉,增加阻燃性,再通过添加海泡石增加强度的同时,进一步提高阻燃性能,再通过与无碱玻璃微纤维、竹浆等混合造纸,再通过浸渍液浸渍,进行表面改性,添加桧柏油、多巴胺提高抗菌性,从而制备得阻燃抗菌复合空气滤纸。

Description

一种阻燃抗菌复合空气滤纸的制备方法
技术领域
本发明涉及一种阻燃抗菌复合空气滤纸的制备方法,属于空气过滤材料技术领域。
背景技术
空气滤纸作为空气过滤器滤芯的关键组成部分,其性能决定了空气过滤器的使用效果。随着医药、医疗卫生、电子等行业对厂房洁净度的要求越来越高,对空气过滤器提出了更高的要求。尤其是食品、制药等生产环节要求的超洁净烘箱或高温空气净化设备和系统,其最高工作温度达到350℃,因此对滤纸的耐温性提出了更高的要求。目前国内外在温度较高的环境中使用较多的是纯玻璃微纤维滤纸,这种滤纸不含粘结剂,国内外大多数滤纸生产厂家均可生产,这种不含粘结剂的过滤纸(有隔板)存在强度低的缺点,不利于机械化生产,且体积重量较大,易泄漏等缺点。
阻燃空气滤纸是用来制作空气滤清器中的纸质滤芯,这种纸质滤芯是空气滤清器中的关键性部件,决定着空气滤清器的性能。既要有好的过滤效率,又要有好的阻燃性能。目前国内市场上该类产品多使用添加型阻燃剂,该类阻燃剂有两大缺点,其一是阻燃效率低,加入的量一般都较大,从而导致滤纸力学性能下降,其二是阻燃效果不能持久,会有返卤吸潮的现象产生,造成环境污染。采用空气滤纸过滤时,细菌、病毒和微生物等都黏附在空气滤纸的表面,滤纸所处的适宜温、湿度就为细菌的繁殖提供了很好的环境,细菌有可能大量繁殖,一旦细菌大量繁殖就会造成二次污染。
发明内容
本发明所要解决的技术问题:针对目前阻燃空气滤纸中的阻燃剂阻燃效率低,加入量大,导致滤纸力学性能下降,阻燃效果不能持久,会有返卤吸潮的现象产生,造成环境污染,同时滤纸表面易黏附细菌,造成二次污染的问题,本发明通过急速冷却混合壳聚糖、淀粉,将其与正硅酸乙酯及三甲基氯硅烷进行接枝反应,以壳聚糖为抑菌物,再将反应物接枝淀粉,增加阻燃性,再通过添加海泡石增加强度的同时,进一步提高阻燃性能,再通过与无碱玻璃微纤维、竹浆等混合造纸,再通过浸渍液浸渍,进行表面改性,添加桧柏油、多巴胺提高抗菌性,从而制备得阻燃抗菌复合空气滤纸。
为解决上述技术问题,本发明采用如下所述的技术方案是:
(1)按固液比1:3,取壳聚糖放入质量分数为20%的盐酸溶液中,并向其中加入壳聚糖质量1~3%的玉米淀粉,并置于超声振荡器中在26~28KHz下振荡20~30min,再加入盐酸溶液体积30~40%的无水乙醇,搅拌均匀后放入液氮速冻机中,设定温度为-15~-10℃,冷冻3~5min;
(2)在上述冷冻结束后,按质量比6:4:1取冷冻物、正硅酸乙酯及三甲基氯硅烷放入高压反应釜中,升温至70~80℃,预热20~30min,使用质量分数为30%的氢氧化钠溶液调节pH至8.0~8.5,升温至120~130℃,以160r/min搅拌反应3~4h,自然冷却至室温,出料并过滤,使用蒸馏水冲洗滤渣直至冲洗液pH至中性;
(3)在上述冲洗过后,将滤渣与其质量5~7%的海泡石放入碾磨机中进行研磨,过200目筛,按重量份数计,取50~55份无碱玻璃微纤维、35~40份竹浆、18~24份过筛所得的颗粒及40~50份质量分数为质量分数为4%的盐酸溶液放入打浆机中进行打浆,打浆至25~32︒SR;
(4)将上述浆料与其质量0.6~1.2%的聚醋酸乙烯酯,搅拌均匀,再加入水调浆至固含量为3~4%,随后将调好的浆料以0.6~1.2cm/s的速度通过压纸机成型,压力设定为13~22MPa;
(5)将上述压制成型后的滤纸原纸以2.4~2.8m/s通过浸渍槽,使浸渍均匀涂布于滤纸,随后再将其置于真空干燥箱,设定温度为45~50℃,真空度为0.05~0.06MPa,干燥6~8h,即可得到阻燃抗菌复合空气滤纸。
所述的步骤(5)中浸渍液为按重量份数计,取40~50份聚氨酯树脂、22~24份苯丙乳液、8~16份桧柏油及1~2份多巴胺放入反应釜中于80~85℃下搅拌4~6h,再冷却至室温,即可得浸渍液。
经检测本发明所得的空气滤纸耐磨度为312~330kPa,抗张强度为0.68~0.82KN/m,抗菌性能达99.8%以上,过滤效率达98.9%以上,LOI值为41.8~46.2,平均孔径为28~34μm。
本发明与其他方法相比,有益技术效果是:
(1)本发明制备的空气滤纸通过以内部壳聚糖、外部桧柏油为抗菌物质,抗菌效果显著,以硅类物质、海泡石等天然物作为阻燃剂,不会对人体及环境造成伤害及污染,制备过程简便易操作;
(2)本发明所得的空气滤纸抗菌性能达99.8%以上,过滤效率达98.9%以上。
具体实施方式
按固液比1:3,取壳聚糖放入质量分数为20%的盐酸溶液中,并向其中加入壳聚糖质量1~3%的玉米淀粉,并置于超声振荡器中在26~28KHz下振荡20~30min,再加入盐酸溶液体积30~40%的无水乙醇,搅拌均匀后放入液氮速冻机中,设定温度为-10~-15℃,冷冻3~5min;在上述冷冻结束后,按质量比6:4:1取冷冻物、正硅酸乙酯及三甲基氯硅烷放入高压反应釜中,升温至70~80℃,预热20~30min,使用质量分数为30%的氢氧化钠溶液调节pH至8.0~8.5,升温至120~130℃,以160r/min搅拌反应3~4h,自然冷却至室温,出料并过滤,使用蒸馏水冲洗滤渣直至冲洗液pH至中性;在上述冲洗过后,将滤渣与其质量5~7%的海泡石放入碾磨机中进行研磨,过200目筛,按重量份数计,取50~55份无碱玻璃微纤维、35~40份竹浆、18~24份过筛所得的颗粒及40~50份质量分数为质量分数为4%的盐酸溶液放入打浆机中进行打浆,打浆至25~32︒SR;将上述浆料与其质量0.6~1.2%的聚醋酸乙烯酯,搅拌均匀,再加入水调浆至固含量为3~4%,随后将调好的浆料以0.6~1.2cm/s的速度通过压纸机成型,压力设定为13~22MPa;将上述压制成型后的滤纸原纸以2.4~2.8m/s通过浸渍槽,使浸渍均匀涂布于滤纸,随后再将其置于真空干燥箱,设定温度为45~50℃,真空度为0.05~0.06MPa,干燥6~8h,即可得到阻燃抗菌复合空气滤纸。所述的中浸渍液为按重量份数计,取40~50份聚氨酯树脂、22~24份苯丙乳液、8~16份桧柏油及1~2份多巴胺放入反应釜中于80~85℃下搅拌4~6h,再冷却至室温,即可得浸渍液。
实例1
按固液比1:3,取壳聚糖放入质量分数为20%的盐酸溶液中,并向其中加入壳聚糖质量2%的玉米淀粉,并置于超声振荡器中在27KHz下振荡25min,再加入盐酸溶液体积35%的无水乙醇,搅拌均匀后放入液氮速冻机中,设定温度为-13℃,冷冻4min;在上述冷冻结束后,按质量比6:4:1取冷冻物、正硅酸乙酯及三甲基氯硅烷放入高压反应釜中,升温至75℃,预热25min,使用质量分数为30%的氢氧化钠溶液调节pH至8.0,升温至125℃,以160r/min搅拌反应3h,自然冷却至室温,出料并过滤,使用蒸馏水冲洗滤渣直至冲洗液pH至中性;在上述冲洗过后,将滤渣与其质量6%的海泡石放入碾磨机中进行研磨,过200目筛,按重量份数计,取52份无碱玻璃微纤维、38份竹浆、20份过筛所得的颗粒及45份质量分数为质量分数为4%的盐酸溶液放入打浆机中进行打浆,打浆至
28︒SR;将上述浆料与其质量0.8%的聚醋酸乙烯酯,搅拌均匀,再加入水调浆至固含量为3.5%,随后将调好的浆料以0.9cm/s的速度通过压纸机成型,压力设定为20MPa;将上述压制成型后的滤纸原纸以2.6m/s通过浸渍槽,使浸渍均匀涂布于滤纸,随后再将其置于真空干燥箱,设定温度为48℃,真空度为0.05MPa,干燥7h,即可得到阻燃抗菌复合空气滤纸。所述的中浸渍液为按重量份数计,取45份聚氨酯树脂、23份苯丙乳液、12份桧柏油及1份多巴胺放入反应釜中于82℃下搅拌5h,再冷却至室温,即可得浸渍液。
经检测本发明所得的空气滤纸耐磨度为312kPa,抗张强度为0.68KN/m,抗菌性能达99.9%,过滤效率达99.1%,LOI值为41.8,平均孔径为28μm。
实例2
按固液比1:3,取壳聚糖放入质量分数为20%的盐酸溶液中,并向其中加入壳聚糖质量3%的玉米淀粉,并置于超声振荡器中在28KHz下振荡30min,再加入盐酸溶液体积40%的无水乙醇,搅拌均匀后放入液氮速冻机中,设定温度为-15℃,冷冻5min;在上述冷冻结束后,按质量比6:4:1取冷冻物、正硅酸乙酯及三甲基氯硅烷放入高压反应釜中,升温至80℃,预热30min,使用质量分数为30%的氢氧化钠溶液调节pH至8.5,升温至130℃,以160r/min搅拌反应4h,自然冷却至室温,出料并过滤,使用蒸馏水冲洗滤渣直至冲洗液pH至中性;在上述冲洗过后,将滤渣与其质量7%的海泡石放入碾磨机中进行研磨,过200目筛,按重量份数计,取55份无碱玻璃微纤维、35份竹浆、18份过筛所得的颗粒及40份质量分数为质量分数为4%的盐酸溶液放入打浆机中进行打浆,打浆至
32︒SR;将上述浆料与其质量1.2%的聚醋酸乙烯酯,搅拌均匀,再加入水调浆至固含量为4%,随后将调好的浆料以1.2cm/s的速度通过压纸机成型,压力设定为22MPa;将上述压制成型后的滤纸原纸以2.8m/s通过浸渍槽,使浸渍均匀涂布于滤纸,随后再将其置于真空干燥箱,设定温度为50℃,真空度为0.06MPa,干燥8h,即可得到阻燃抗菌复合空气滤纸。所述的中浸渍液为按重量份数计,取50份聚氨酯树脂、22份苯丙乳液、8份桧柏油及1份多巴胺放入反应釜中于85℃下搅拌6h,再冷却至室温,即可得浸渍液。
经检测本发明所得的空气滤纸耐磨度为330kPa,抗张强度为0.82KN/m,抗菌性能达99.93%,过滤效率达99.5%,LOI值为46.2,平均孔径为34μm。
实例3
按固液比1:3,取壳聚糖放入质量分数为20%的盐酸溶液中,并向其中加入壳聚糖质量1%的玉米淀粉,并置于超声振荡器中在26KHz下振荡20min,再加入盐酸溶液体积30%的无水乙醇,搅拌均匀后放入液氮速冻机中,设定温度为-10℃,冷冻3min;在上述冷冻结束后,按质量比6:4:1取冷冻物、正硅酸乙酯及三甲基氯硅烷放入高压反应釜中,升温至70℃,预热20min,使用质量分数为30%的氢氧化钠溶液调节pH至8.0,升温至120℃,以160r/min搅拌反应3h,自然冷却至室温,出料并过滤,使用蒸馏水冲洗滤渣直至冲洗液pH至中性;在上述冲洗过后,将滤渣与其质量5%的海泡石放入碾磨机中进行研磨,过200目筛,按重量份数计,取50份无碱玻璃微纤维、40份竹浆、24份过筛所得的颗粒及50份质量分数为质量分数为4%的盐酸溶液放入打浆机中进行打浆,打浆至
25︒SR;将上述浆料与其质量0.6%的聚醋酸乙烯酯,搅拌均匀,再加入水调浆至固含量为3%,随后将调好的浆料以0.6cm/s的速度通过压纸机成型,压力设定为13MPa;将上述压制成型后的滤纸原纸以2.4m/s通过浸渍槽,使浸渍均匀涂布于滤纸,随后再将其置于真空干燥箱,设定温度为45℃,真空度为0.05MPa,干燥6h,即可得到阻燃抗菌复合空气滤纸。所述的中浸渍液为按重量份数计,取40份聚氨酯树脂24份苯丙乳液、16份桧柏油及2份多巴胺放入反应釜中于80℃下搅拌4h,再冷却至室温,即可得浸渍液。
经检测本发明所得的空气滤纸耐磨度为328kPa,抗张强度为0.76KN/m,抗菌性能达99.99%,过滤效率达99.8%,LOI值为44.3,平均孔径为32μm。

Claims (2)

1.一种阻燃抗菌复合空气滤纸的制备方法,其特征在于具体制备步骤为:
(1)按固液比1:3,取壳聚糖放入质量分数为20%的盐酸溶液中,并向其中加入壳聚糖质量1~3%的玉米淀粉,并置于超声振荡器中在26~28KHz下振荡20~30min,再加入盐酸溶液体积30~40%的无水乙醇,搅拌均匀后放入液氮速冻机中,设定温度为-15~-10℃,冷冻3~5min;
(2)在上述冷冻结束后,按质量比6:4:1取冷冻物、正硅酸乙酯及三甲基氯硅烷放入高压反应釜中,升温至70~80℃,预热20~30min,使用质量分数为30%的氢氧化钠溶液调节pH至8.0~8.5,升温至120~130℃,以160r/min搅拌反应3~4h,自然冷却至室温,出料并过滤,使用蒸馏水冲洗滤渣直至冲洗液pH至中性;
(3)在上述冲洗过后,将滤渣与其质量5~7%的海泡石放入碾磨机中进行研磨,过200目筛,按重量份数计,取50~55份无碱玻璃微纤维、35~40份竹浆、18~24份过筛所得的颗粒及40~50份质量分数为质量分数为4%的盐酸溶液放入打浆机中进行打浆,打浆至25~32︒SR;
(4)将上述浆料与其质量0.6~1.2%的聚醋酸乙烯酯,搅拌均匀,再加入水调浆至固含量为3~4%,随后将调好的浆料以0.6~1.2cm/s的速度通过压纸机成型,压力设定为13~22MPa;
(5)将上述压制成型后的滤纸原纸以2.4~2.8m/s通过浸渍槽,使浸渍均匀涂布于滤纸,随后再将其置于真空干燥箱,设定温度为45~50℃,真空度为0.05~0.06MPa,干燥6~8h,即可得到阻燃抗菌复合空气滤纸。
2.根据权利要求1所述的一种阻燃抗菌复合空气滤纸的制备方法,其特征在于:所述的步骤(5)中浸渍液为按重量份数计,取40~50份聚氨酯树脂、22~24份苯丙乳液、8~16份桧柏油及1~2份多巴胺放入反应釜中于80~85℃下搅拌4~6h,再冷却至室温,即可得浸渍液。
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