CN113185742B - 一种防水耐腐蚀保护膜及其制备方法 - Google Patents
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Abstract
本发明涉及高分子材料领域,具体为一种防水耐腐蚀保护膜及其制备方法,包括PET基膜、第一膜层和第二膜层;所述第一膜层由改性聚酰亚胺和纳米ZnO复合而成;所述第二膜层为类水滑石超疏水层,本发明在PET基膜上复合第一膜层和第二膜层后有助于提升整体保护膜的力学性能,而且接触角≥155.9°,有良好的疏水防水和耐腐蚀性能,可以起到很好的保护效果。
Description
技术领域
本发明涉及高分子材料领域,具体涉及一种防水耐腐蚀保护膜及其制备方法。
背景技术
一些高档板材及大型电子设备在运输过程中需要用到保护膜对其表面进行防护以防止污渍沾染和锐物划伤,这些高档板材及大型电子设备往往通过海运出口,运输环境往往是高湿高腐蚀性,这就对保护膜的性能提出了较高的要求,目前的保护膜往往是PE材质,其防水耐腐蚀性能难以满足长时间海运的要求。
发明内容
发明目的:针对上述技术问题,本发明提供了一种防水耐腐蚀保护膜及其制备方法。
本发明所采用的技术方案如下:
一种防水耐腐蚀保护膜,包括PET基膜、第一膜层和第二膜层;
所述第一膜层由改性聚酰亚胺和纳米ZnO复合而成;
所述第二膜层为类水滑石超疏水层。
进一步地,所述改性聚酰亚胺的制备方法如下:
将4,4'-二氨基二苯砜、N,N-二甲基乙酰胺混合后,冰浴下搅拌5-10min,缓慢加入3,3'4,4'-二苯甲酮四羧酸二酐,室温反应3-5h后,加入二甲苯,升温至回流将反应生成的水蒸出,恢复室温,加入甲醇和硅倍半氧烷,搅拌1-5h后抽滤,所得固体在惰性气体保护下80-90℃干燥8-12h后,再一段升温至150-160℃,保温烘0.5-1h,再二段升温至200-220℃,保温烘0.5-1h,最后三段升温至300-320℃下保温烘0.5-1h即可。
进一步地,所述硅倍半氧烷为笼型八氨基苯基硅倍半氧烷、笼型八苯基硅倍半氧烷、梯形聚苯基硅倍半氧烷中的任意一种或以上。
进一步地,一段升温的速度为10-15℃/min,二段升温的速度为3-5℃/min,三段升温的速度为1-1.5℃/min。
上述防水耐腐蚀保护膜的制备方法如下:
S1:将纳米ZnO加入到N,N-二甲基乙酰胺中,超声振荡处理2-5h得到悬液,将棕榈蜡加入后,升温至40-50℃搅拌20-30min再将改性聚酰亚胺加入,继续搅拌1-1.5h后恢复室温得到第一膜层膜液,利用流延成膜工艺在PET基膜上形成第一膜层,得到第一膜体;
S2:将硝酸锌和硝酸钠加入到水中搅拌均匀得到均一的溶液,再用氨水调节溶液pH至6-7,升温至70-75℃反应10-20h,将第一膜体作为过滤膜铺设在漏斗中,将反应液倒入并抽滤,在第一膜体表面成膜,与滤纸分离后得到第二膜体,所得第二膜体浸入温度为50-60℃的硬脂酸的乙醇/水溶液中5-10h后取出水洗,40-50℃真空干燥5-10h后,在第一膜层表面形成类水滑石超疏水层;
S3:最后将保护膜以5-10℃/min的速度升温至70-80℃,保温5-10h后,再以1-2℃/min的速度降温至室温即可。
进一步地,改性聚酰亚胺、纳米ZnO、棕榈蜡的质量比为20-30:4-6:1-2。
进一步地,流延成膜工艺如下:
将PET基膜固定于聚四氟乙烯模具中,再将第一膜层膜液倒入,使其均匀铺满PET基膜表面,60-65℃下减压挥发溶剂,20-25h后取出即可。
进一步地,硝酸锌和硝酸钠的物质的量比为5:3。
进一步地,氨水的质量浓度为1-1.5%。
进一步地,乙醇/水溶液中乙醇与水的体积比为1:1,硬脂酸的质量浓度为2-3g/L。
本发明的有益效果:
本发明提供了一种防水耐腐蚀保护膜,使用PET作为基膜,PET膜机械性能优良,刚性、硬度及韧性高,耐穿刺,耐摩擦,耐高温和低温,但是其对于水汽和有机溶剂的阻隔和耐受性还达不到要求,发明人在PET基膜上依次复合改性聚酰亚胺/纳米ZnO膜和类水滑石超疏水层,聚酰亚胺目前综合性能相对较佳的聚合物材料,本发明合成的酮酐型聚酰亚胺是纳米ZnO良好的成膜载体,利用硅倍半氧烷对其改性后可以进一步改善其力学性能、柔韧性和耐热性,还使其与PET基膜有更好的结合性能,类水滑石称为层状双金属氢氧化物,单独使用具有易流失的缺点,发明利用抽滤成膜的方法使其在改性聚酰亚胺/纳米ZnO膜上沉降成膜,具有结合牢固度高(100次卷取折叠无剥落),且进一步提升耐腐蚀性能的优点,表面引入的超疏水表面可以防水自清洁,使保护膜表面时刻保持光洁。
附图说明
图1是本发明示意图防水耐腐蚀保护膜的结构示意图;
图中标号分别代表:
1-PET基膜、2-第一膜层、3-第二膜层。
图2为实施例1中类水滑石超疏水层的表面形貌图;
可以观察到类水滑石超疏水层表面平整连续均匀且致密,具有很好的防护效果。
具体实施方式
实施例中未注明具体条件者,按照常规条件或制造商建议的条件进行。所用试剂或仪器未注明生产厂商者,均为可以通过市售购买获得的常规产品。
实施例1:
一种防水耐腐蚀保护膜,包括PET基膜(浙江宏远,热成型泡罩包装PET薄膜,拉伸强度38.6MPa,断裂伸长率33.5%)、第一膜层和第二膜层;
其制备方法如下:
将纳米ZnO加入到N,N-二甲基乙酰胺中,超声振荡处理3h得到悬液,将棕榈蜡加入后,升温至40℃搅拌25min再将改性聚酰亚胺加入,改性聚酰亚胺、纳米ZnO、棕榈蜡的质量比为20:5:1,继续搅拌1.5h后恢复室温得到第一膜层膜液,将PET基膜固定于聚四氟乙烯模具中,再将第一膜层膜液倒入,使其均匀铺满PET基膜表面,60℃下减压挥发溶剂,25h后取出,即可在PET基膜上形成第一膜层,得到第一膜体,将物质的量比为5:3的硝酸锌和硝酸钠加入到水中搅拌均匀得到均一的溶液,再用质量浓度为1%的氨水调节溶液pH至6.4,升温至75℃反应10h,将第一膜体作为过滤膜铺设在漏斗中,将反应液倒入并抽滤,在第一膜体表面成膜,与滤纸分离后得到第二膜体,所得第二膜体浸入温度为60℃,质量浓度为2g/L的硬脂酸的乙醇/水溶液中10h后取出水洗(乙醇与水的体积比为1:1),40℃真空干燥5h后,在第一膜层表面形成类水滑石超疏水层,最后将保护膜以10℃/min的速度升温至75℃,保温5h后,再以1℃/min的速度降温至室温即可。
其中,所述改性聚酰亚胺的制备方法如下:
将4,4'-二氨基二苯砜、N,N-二甲基乙酰胺混合后,冰浴下搅拌10min,缓慢加入3,3'4,4'-二苯甲酮四羧酸二酐,室温反应4h后,加入二甲苯,升温至回流将反应生成的水蒸出,恢复室温,加入甲醇和笼型八氨基苯基硅倍半氧烷,搅拌2h后抽滤,所得固体在惰性气体保护下80℃干燥10h后,再以12℃/min的速度一段升温至160℃,保温烘0.5h,再以4℃/min的速度二段升温至200℃,保温烘1h,最后以1.2℃/min的速度三段升温至300℃下保温烘1h即可。
实施例2:
一种防水耐腐蚀保护膜,包括PET基膜(浙江宏远,热成型泡罩包装PET薄膜,拉伸强度38.6MPa,断裂伸长率33.5%)、第一膜层和第二膜层;
其制备方法如下:
将纳米ZnO加入到N,N-二甲基乙酰胺中,超声振荡处理2h得到悬液,将棕榈蜡加入后,升温至50℃搅拌20min再将改性聚酰亚胺加入,改性聚酰亚胺、纳米ZnO、棕榈蜡的质量比为30:4:1,继续搅拌1h后恢复室温得到第一膜层膜液,将PET基膜固定于聚四氟乙烯模具中,再将第一膜层膜液倒入,使其均匀铺满PET基膜表面,65℃下减压挥发溶剂,20h后取出,即可在PET基膜上形成第一膜层,得到第一膜体,将物质的量比为5:3的硝酸锌和硝酸钠加入到水中搅拌均匀得到均一的溶液,再用质量浓度为1.5%的氨水调节溶液pH至6,升温至75℃反应10h,将第一膜体作为过滤膜铺设在漏斗中,将反应液倒入并抽滤,在第一膜体表面成膜,与滤纸分离后得到第二膜体,所得第二膜体浸入温度为60℃,质量浓度为2g/L的硬脂酸的乙醇/水溶液中10h后取出水洗(乙醇与水的体积比为1:1),40℃真空干燥10h后,在第一膜层表面形成类水滑石超疏水层,最后将保护膜以5℃/min的速度升温至80℃,保温5h后,再以2℃/min的速度降温至室温即可。
其中,所述改性聚酰亚胺的制备方法如下:
将4,4'-二氨基二苯砜、N,N-二甲基乙酰胺混合后,冰浴下搅拌5min,缓慢加入3,3'4,4'-二苯甲酮四羧酸二酐,室温反应5h后,加入二甲苯,升温至回流将反应生成的水蒸出,恢复室温,加入甲醇和笼型八氨基苯基硅倍半氧烷,搅拌1h后抽滤,所得固体在惰性气体保护下90℃干燥8h后,再以15℃/min的速度一段升温至150℃,保温烘1h,再以3℃/min的速度二段升温至220℃,保温烘0.5h,最后以1.5℃/min的速度三段升温至300℃下保温烘1h即可。
实施例3:
一种防水耐腐蚀保护膜,包括PET基膜(浙江宏远,热成型泡罩包装PET薄膜,拉伸强度38.6MPa,断裂伸长率33.5%)、第一膜层和第二膜层;
其制备方法如下:
将纳米ZnO加入到N,N-二甲基乙酰胺中,超声振荡处理5h得到悬液,将棕榈蜡加入后,升温至40℃搅拌30min再将改性聚酰亚胺加入,改性聚酰亚胺、纳米ZnO、棕榈蜡的质量比为20:6:1,继续搅拌1.5h后恢复室温得到第一膜层膜液,将PET基膜固定于聚四氟乙烯模具中,再将第一膜层膜液倒入,使其均匀铺满PET基膜表面,60℃下减压挥发溶剂,25h后取出,即可在PET基膜上形成第一膜层,得到第一膜体,将物质的量比为5:3的硝酸锌和硝酸钠加入到水中搅拌均匀得到均一的溶液,再用质量浓度为1%的氨水调节溶液pH至7,升温至70℃反应20h,将第一膜体作为过滤膜铺设在漏斗中,将反应液倒入并抽滤,在第一膜体表面成膜,与滤纸分离后得到第二膜体,所得第二膜体浸入温度为50℃,质量浓度为3g/L的硬脂酸的乙醇/水溶液中5h后取出水洗(乙醇与水的体积比为1:1),50℃真空干燥5h后,在第一膜层表面形成类水滑石超疏水层,最后将保护膜以10℃/min的速度升温至70℃,保温10h后,再以1℃/min的速度降温至室温即可。
其中,所述改性聚酰亚胺的制备方法如下:
将4,4'-二氨基二苯砜、N,N-二甲基乙酰胺混合后,冰浴下搅拌10min,缓慢加入3,3'4,4'-二苯甲酮四羧酸二酐,室温反应3h后,加入二甲苯,升温至回流将反应生成的水蒸出,恢复室温,加入甲醇和笼型八氨基苯基硅倍半氧烷,搅拌5h后抽滤,所得固体在惰性气体保护下80℃干燥12h后,再以10℃/min的速度一段升温至160℃,保温烘0.5h,再以5℃/min的速度二段升温至200℃,保温烘1h,最后以1℃/min的速度三段升温至320℃下保温烘0.5h即可。
实施例4:
一种防水耐腐蚀保护膜,包括PET基膜(浙江宏远,热成型泡罩包装PET薄膜,拉伸强度38.6MPa,断裂伸长率33.5%)、第一膜层和第二膜层;
其制备方法如下:
将纳米ZnO加入到N,N-二甲基乙酰胺中,超声振荡处理2h得到悬液,将棕榈蜡加入后,升温至40℃搅拌20min再将改性聚酰亚胺加入,改性聚酰亚胺、纳米ZnO、棕榈蜡的质量比为20:4:1,继续搅拌1h后恢复室温得到第一膜层膜液,将PET基膜固定于聚四氟乙烯模具中,再将第一膜层膜液倒入,使其均匀铺满PET基膜表面,60℃下减压挥发溶剂,20h后取出,即可在PET基膜上形成第一膜层,得到第一膜体,将物质的量比为5:3的硝酸锌和硝酸钠加入到水中搅拌均匀得到均一的溶液,再用质量浓度为1%的氨水调节溶液pH至6,升温至70℃反应10h,将第一膜体作为过滤膜铺设在漏斗中,将反应液倒入并抽滤,在第一膜体表面成膜,与滤纸分离后得到第二膜体,所得第二膜体浸入温度为50℃,质量浓度为2g/L的硬脂酸的乙醇/水溶液中5h后取出水洗(乙醇与水的体积比为1:1),40℃真空干燥5h后,在第一膜层表面形成类水滑石超疏水层,最后将保护膜以5℃/min的速度升温至70℃,保温5h后,再以1℃/min的速度降温至室温即可。
其中,所述改性聚酰亚胺的制备方法如下:
将4,4'-二氨基二苯砜、N,N-二甲基乙酰胺混合后,冰浴下搅拌5min,缓慢加入3,3'4,4'-二苯甲酮四羧酸二酐,室温反应3h后,加入二甲苯,升温至回流将反应生成的水蒸出,恢复室温,加入甲醇和笼型八氨基苯基硅倍半氧烷,搅拌1h后抽滤,所得固体在惰性气体保护下80℃干燥8h后,再以10℃/min的速度一段升温至150℃,保温烘0.5h,再以3℃/min的速度二段升温至200℃,保温烘0.5h,最后以1℃/min的速度三段升温至300℃下保温烘0.5h即可。
实施例5:
一种防水耐腐蚀保护膜,包括PET基膜(浙江宏远,热成型泡罩包装PET薄膜,拉伸强度38.6MPa,断裂伸长率33.5%)、第一膜层和第二膜层;
其制备方法如下:
将纳米ZnO加入到N,N-二甲基乙酰胺中,超声振荡处理5h得到悬液,将棕榈蜡加入后,升温至50℃搅拌30min再将改性聚酰亚胺加入,改性聚酰亚胺、纳米ZnO、棕榈蜡的质量比为30:6:1,继续搅拌1.5h后恢复室温得到第一膜层膜液,将PET基膜固定于聚四氟乙烯模具中,再将第一膜层膜液倒入,使其均匀铺满PET基膜表面,65℃下减压挥发溶剂,25h后取出,即可在PET基膜上形成第一膜层,得到第一膜体,将物质的量比为5:3的硝酸锌和硝酸钠加入到水中搅拌均匀得到均一的溶液,再用质量浓度为1.5%的氨水调节溶液pH至7,升温至75℃反应20h,将第一膜体作为过滤膜铺设在漏斗中,将反应液倒入并抽滤,在第一膜体表面成膜,与滤纸分离后得到第二膜体,所得第二膜体浸入温度为60℃,质量浓度为3g/L的硬脂酸的乙醇/水溶液中10h后取出水洗(乙醇与水的体积比为1:1),50℃真空干燥10h后,在第一膜层表面形成类水滑石超疏水层,最后将保护膜以10℃/min的速度升温至80℃,保温10h后,再以2℃/min的速度降温至室温即可。
其中,所述改性聚酰亚胺的制备方法如下:
将4,4'-二氨基二苯砜、N,N-二甲基乙酰胺混合后,冰浴下搅拌10min,缓慢加入3,3'4,4'-二苯甲酮四羧酸二酐,室温反应5h后,加入二甲苯,升温至回流将反应生成的水蒸出,恢复室温,加入甲醇和笼型八氨基苯基硅倍半氧烷,搅拌5h后抽滤,所得固体在惰性气体保护下90℃干燥12h后,再以15℃/min的速度一段升温至160℃,保温烘1h,再以5℃/min的速度二段升温至220℃,保温烘1h,最后以1.5℃/min的速度三段升温至320℃下保温烘1h即可。
实施例6:
一种防水耐腐蚀保护膜,包括PET基膜(浙江宏远,热成型泡罩包装PET薄膜,拉伸强度38.6MPa,断裂伸长率33.5%)、第一膜层和第二膜层;
其制备方法如下:
将纳米ZnO加入到N,N-二甲基乙酰胺中,超声振荡处理5h得到悬液,将棕榈蜡加入后,升温至40℃搅拌25min再将改性聚酰亚胺加入,改性聚酰亚胺、纳米ZnO、棕榈蜡的质量比为25:5:1,继续搅拌1h后恢复室温得到第一膜层膜液,将PET基膜固定于聚四氟乙烯模具中,再将第一膜层膜液倒入,使其均匀铺满PET基膜表面,65℃下减压挥发溶剂,25h后取出,即可在PET基膜上形成第一膜层,得到第一膜体,将物质的量比为5:3的硝酸锌和硝酸钠加入到水中搅拌均匀得到均一的溶液,再用质量浓度为1%的氨水调节溶液pH至6,升温至70℃反应12h,将第一膜体作为过滤膜铺设在漏斗中,将反应液倒入并抽滤,在第一膜体表面成膜,与滤纸分离后得到第二膜体,所得第二膜体浸入温度为55℃,质量浓度为2g/L的硬脂酸的乙醇/水溶液中10h后取出水洗(乙醇与水的体积比为1:1),40℃真空干燥10h后,在第一膜层表面形成类水滑石超疏水层,最后将保护膜以5℃/min的速度升温至75℃,保温5h后,再以1℃/min的速度降温至室温即可。
其中,所述改性聚酰亚胺的制备方法如下:
将4,4'-二氨基二苯砜、N,N-二甲基乙酰胺混合后,冰浴下搅拌10min,缓慢加入3,3'4,4'-二苯甲酮四羧酸二酐,室温反应4h后,加入二甲苯,升温至回流将反应生成的水蒸出,恢复室温,加入甲醇和笼型八氨基苯基硅倍半氧烷,搅拌2h后抽滤,所得固体在惰性气体保护下80℃干燥12h后,再以10℃/min的速度一段升温至155℃,保温烘0.5h,再以4℃/min的速度二段升温至200℃,保温烘0.5h,最后以1℃/min的速度三段升温至300℃下保温烘0.5h即可。
对比例1:
对比例1与实施例1基本相同,区别在于,不包括第二膜层。
对比例2:
对比例2与实施例1基本相同,区别在于,第一膜层中不加入纳米ZnO。
对比例3:
对比例3与实施例1基本相同,区别在于,第一膜层中用市售聚酰亚胺(沁阳市天益化工有限公司)代替改性聚酰亚胺。
对比例4:
对比例4与实施例1基本相同,区别在于,改性聚酰亚胺制备时不加入笼型八氨基苯基硅倍半氧烷。
对比例5:
对比例5与实施例1基本相同,区别在于,第二膜体不用硬脂酸的乙醇/水溶液浸泡。
性能测试:
①参照GB/T 1040.2-2006,采用美特斯工业系统(中国)有限公司Instron-365型电子万能材料试验机对本发明实施例1-6及对比例1-5所制备的保护膜样品进行拉伸试验,测试样品的有效尺寸为3cm×3cm×1μm,夹具间距为20mm,拉伸速率为5mm/min,环境温度25℃。
②接触角测试
用接触角测量仪对实施例1-6及对比例1-5所制备的保护膜样品进行疏水性测试,具体采用0.5mm针头滴出5uL水滴,对每一个保护膜样品进行3-5次的测试后计算平均值。
③防水性测试
取一两端敞口直径为5cm的圆柱形容器,分别将实施例1-6及对比例1-5所制备的保护膜样品放在容器的一端并在其下表面覆盖上一片滤纸,再放上密封环夹紧,将放上保护膜样品和滤纸的一端朝下,敞口一端朝上,向容器中注入水并使水柱的高度为10cm,10h后观察滤纸上是否有通过样品渗水到滤纸上,无水渗出即通过测试,否则为不通过(单独将PET基膜进行测试未通过)。
④化学浸泡测试
分别用实施例1-6及对比例1-5所制备的保护膜样品将304不锈钢(尺寸40mm×20mm×0.4mm)紧密包覆,制成试样;
根据GB/T17897-1999的方法进行点蚀试验,把100g分析纯三氯化铁(FeCl3·6H20)溶于900mL 0.05mol/L盐酸溶液中,配制成三氯化铁溶液并倒入烧杯内,放入恒温水浴加热至35℃,达到规定温度后,放入试样连续浸泡24h,通过失重法计算腐蚀率。
腐蚀率=(W前-W后)/(S·t)
其中,W前为试样测试前重量
W后为试样测试后重量
S为试样总面积
t为测试时间
上述测试结果如下表1所示:
表1:
由上表1可知,在PET基膜上复合第一膜层和第二膜层后有助于提升整体保护膜的力学性能,而且接触角≥155.9°,有良好的疏水防水和抗腐蚀性能,可以起到很好的保护效果。
以上实施例仅用以说明本发明的技术方案,而非对其限制;尽管参照前述实施例对本发明进行了详细的说明,本领域的普通技术人员应当理解:其依然可以对前述各实施例所记载的技术方案进行修改,或者对其中部分技术特征进行等同替换;而这些修改或者替换,并不使相应技术方案的本质脱离本发明各实施例技术方案的精神和范围。
Claims (5)
1.一种防水耐腐蚀保护膜,其特征在于,包括PET基膜、第一膜层和第二膜层;
所述第一膜层由改性聚酰亚胺和纳米ZnO复合而成;
所述第二膜层为类水滑石超疏水层;
所述改性聚酰亚胺的制备方法如下:
将4,4'-二氨基二苯砜、N,N-二甲基乙酰胺混合后,冰浴下搅拌5-10min,缓慢加入3,3'4,4'-二苯甲酮四羧酸二酐,室温反应3-5h后,加入二甲苯,升温至回流将反应生成的水蒸出,恢复室温,加入甲醇和硅倍半氧烷,搅拌1-5h后抽滤,所得固体在惰性气体保护下80-90℃干燥8-12h后,再一段升温至150-160℃,保温烘0.5-1h,再二段升温至200-220℃,保温烘0.5-1h,最后三段升温至300-320℃下保温烘0.5-1h即可;
其制备方法,具体如下:
S1:将纳米ZnO加入到N,N-二甲基乙酰胺中,超声振荡处理2-5h得到悬液,将棕榈蜡加入后,升温至40-50℃搅拌20-30min再将改性聚酰亚胺加入,继续搅拌1-1.5h后恢复室温得到第一膜层膜液,利用流延成膜工艺在PET基膜上形成第一膜层,得到第一膜体;
S2:将硝酸锌和硝酸钠加入到水中搅拌均匀得到均一的溶液,再用氨水调节溶液pH至6-7,升温至70-75℃反应10-20h,将第一膜体作为过滤膜铺设在漏斗中,将反应液倒入并抽滤,在第一膜体表面成膜,与滤纸分离后得到第二膜体,所得第二膜体浸入温度为50-60℃的硬脂酸的乙醇/水溶液中5-10h后取出水洗,40-50℃真空干燥5-10h后,在第一膜层表面形成类水滑石超疏水层;
S3:最后将保护膜以5-10℃/min的速度升温至70-80℃,保温5-10h后,再以1-2℃/min的速度降温至室温即可;
所述硅倍半氧烷为笼型八氨基苯基硅倍半氧烷、笼型八苯基硅倍半氧烷、梯形聚苯基硅倍半氧烷中的任意一种或以上;
一段升温的速度为10-15℃/min,二段升温的速度为3-5℃/min,三段升温的速度为1-1.5℃/min;
改性聚酰亚胺、纳米ZnO、棕榈蜡的质量比为20-30:4-6:1-2。
2.如权利要求1所述的防水耐腐蚀保护膜,其特征在于,流延成膜工艺如下:
将PET基膜固定于聚四氟乙烯模具中,再将第一膜层膜液倒入,使其均匀铺满PET基膜表面,60-65℃下减压挥发溶剂,20-25h后取出即可。
3.如权利要求1所述的防水耐腐蚀保护膜,其特征在于,硝酸锌和硝酸钠的物质的量比为5:3。
4.如权利要求1所述的防水耐腐蚀保护膜,其特征在于,氨水的质量浓度为1-1.5%。
5.如权利要求1所述的防水耐腐蚀保护膜,其特征在于,乙醇/水溶液中乙醇与水的体积比为1:1,硬脂酸的质量浓度为2-3g/L。
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