CN117327310A - 一种聚四氟乙烯超疏水透气膜及其制备方法和应用 - Google Patents
一种聚四氟乙烯超疏水透气膜及其制备方法和应用 Download PDFInfo
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Abstract
本发明提供一种聚四氟乙烯超疏水透气膜及其制备方法和应用,所述制备方法包括如下步骤:(1)将聚四氟乙烯分散树脂和助剂油混合,熟化,预压成型,推挤,压延,得到聚四氟乙烯基膜;(2)将步骤(1)得到的聚四氟乙烯基膜加热除去助剂油,涂覆涂覆物,烘干预定型,拉伸,热定型,得到所述聚四氟乙烯超疏水透气膜;所述涂覆物包括含氟树脂,所述含氟树脂包括含氟树脂颗粒和/或含氟树脂乳液。本发明提供的制备方法制得的聚四氟乙烯超疏水透气膜具有表面超疏水,透气性好,制备工艺简单的特点。
Description
技术领域
本发明属于聚四氟乙烯膜材料技术领域,具体涉及一种聚四氟乙烯超疏水透气膜及其制备方法和应用。
背景技术
聚四氟乙烯(PTFE)是表面能低、耐候性能好、耐化学试剂优异的聚合物,PTFE的表面水接触角为120°,为疏水材料,为进一步提高其疏水性能需进行疏水性改性,以提高水接触角。
CN104072792A公开了一种超疏水聚四氟乙烯薄膜,所述超疏水聚四氟乙烯薄膜由下述方法制成,该方法包括:(1)超疏水薄膜的制膜液:取质量份为:PTFE乳液15-40份、纯水40-54份、醋酸锌8-25份、氯化钠或氯化钾1-20份,搅拌均匀;(2)将制膜液浸涂在基底上,温度不超过100℃干燥;(3)360-380℃煅烧20-40分钟;(4)0.5-1.5mol/L醋酸溶液浸泡20-40分钟;(5)从基底上揭下交联固化的聚四氟乙烯薄膜。该技术方案提供的超疏水聚四氟乙烯薄膜生产方法简单,超疏水表面具有高耐磨性和高耐候性,但制备过程需要制备制膜液,长时间的煅烧、浸泡等步骤,耗时长,不利于连续化生产。
CN104437126A公开了一种超疏水性聚四氟乙烯微孔膜的制备方法、由该方法制得的膜及其应用,所述超疏水性聚四氟乙烯微孔膜的制备方法包括以下步骤:(1)将聚四氟乙烯树脂、助挤剂、超疏水性含氟材料和任选的溶剂混合起来形成糊料;(2)将所述糊料制成初生膜;(3)对所述初生膜进行热处理、拉伸和烧结,形成所述超疏水性聚四氟乙烯微孔膜。该技术方案提供的超疏水性聚四氟乙烯微孔膜,疏水性好,水接触角可达140°,但疏水性仍有待于进一步提高。
CN114425244A公开了一种基于聚四氟乙烯的改性超疏水膜的制备方法及其应用,所述基于聚四氟乙烯的改性超疏水膜的制备方法,包括以下步骤:S1、疏水性聚四氟乙烯滤膜以乙醇预润湿后浸入热的氢氧化钠、十二烷基二甲基苄基氯化铵混合水溶液中,保温浸泡完成后以去离子水洗涤,得到第一改性滤膜;
S2、将所述第一改性滤膜浸入γ-氨基丙基三乙氧基硅烷的乙醇溶液中,得到第二改性滤膜;S3、将所述第二改性滤膜浸入分散有二氧化硅粒子的酸性缓冲溶液中,得到第三改性滤膜;S4、将所述第三改性滤膜浸入(1H,1H,2H,2H-)全氟癸基三乙氧基硅烷的乙醇溶液中,浸泡完成后干燥,制得所述改性超疏水膜。该技术方法提供的制备方法提高了聚四氟乙烯膜的疏水性,但制备过程较繁杂。
因此,需要开发一种表面超疏水,透气,制备工艺简单的聚四氟乙烯超疏水透气膜及其制备方法。
发明内容
针对现有技术的不足,本发明的目的在于提供一种聚四氟乙烯超疏水透气膜及其制备方法和应用,采用本发明所述制备方法制得的聚四氟乙烯超疏水透气膜具有表面超疏水,透气性好,制备工艺简单的特点。
为达此目的,本发明采用以下技术方案:
第一方面,本发明提供一种聚四氟乙烯超疏水透气膜的制备方法,所述制备方法包括如下步骤:
(1)将聚四氟乙烯分散树脂和助剂油混合,熟化,预压成型,推挤,压延,得到聚四氟乙烯基膜;
(2)将步骤(1)得到的聚四氟乙烯基膜加热除去助剂油,涂覆涂覆物,烘干预定型,拉伸,热定型,得到所述聚四氟乙烯超疏水透气膜;
所述涂覆物包括含氟树脂,所述含氟树脂包括含氟树脂颗粒和/或含氟树脂乳液。
本发明中,通过在聚四氟乙烯基膜表面涂覆涂覆物,烘干预定型,所述涂覆物包括含氟树脂,含氟树脂的分子链含大量-CF2、-CF3基团,表面能低,使聚四氟乙烯基膜表面形成具有含氟基团的粗糙结构,再通过拉伸和热定型的步骤,形成同时具有微孔结构和表面粗糙结构的聚四氟乙烯超疏水透气膜。采用所述方法制备得到的微孔结构和表面粗糙结构具有协同作用,能增加聚四氟乙烯超疏水透气膜的疏水性,产生荷叶效应,使所述聚四氟乙烯超疏水透气膜具有表面超疏水,透气的特点。
本发明中,所述超疏水意指水接触角≥150°
优选地,步骤(1)所述熟化的温度为30-60℃,例如32℃、34℃、36℃、38℃、40℃、45℃、48℃、50℃、55℃或58℃等,熟化的时间≥8h,例如9h、10h、15h、18h、20h、24h、28h、30h或35h等。
优选地,所述步骤(2)所述加热的温度为100-300℃,例如120℃、140℃、160℃、180℃、200℃、220℃、240℃、260℃或280℃等。
本发明中,所述加热的作用是将聚四氟乙烯基膜中助剂油挥发干净。
优选地,步骤(2)所述涂覆包括刷涂、压力喷涂、静电喷涂、溅射或沉积中的任意一种。
优选地,步骤(2)所述烘干预定型的温度为100-320℃,例如120℃、140℃、160℃、180℃、200℃、220℃、240℃、260℃、280℃或300℃等。
优选地,步骤(2)所述拉伸包括单向拉伸或双向拉伸。
优选地,步骤(2)所述热定型的温度为342-390℃,例如350℃、355℃、360℃、365℃、370℃、375℃、380℃或385℃等,时间为1-300s,例如5s、10s、50s、80s、100s、120s、150s、180s、200s、250s或280s等。
本发明中,所述含氟树脂在342-390℃高温下,300s以内均不易分解,使得在热定型工艺之后,所制得的具有表面粗糙结构的聚四氟乙烯超疏水透气膜不分解、不变形。若热定型的温度过高,则含氟树脂分解,若热定型的温度过低,则拉伸后的多孔结构易变形,制得的聚四氟乙烯超疏水透气膜不稳定。所述热定型的时间优选为1-300s,为了保证生产效率,热定型时间不宜更久。若热定型的时间过长,则含氟树脂分解,且效率低,若热定型的时间过短,则拉伸后的多孔结构易变形,制得的聚四氟乙烯超疏水透气膜不稳定。
优选地,所述助剂油包括石脑油、溶剂油或石蜡油中的任意一种或至少两种的组合。
本发明中,所述助剂油按照沸程从低到高分成三类:石脑油、溶剂油、石蜡油,沸程区间分别为120-150℃、150-300℃和300℃以上。
优选地,步骤(1)所述混合前还包括加入颜填料。
优选地,以所述聚四氟乙烯分散树脂、助剂油和颜填料的总质量为100%计,所述助剂油的质量百分比为15-30%,例如16%、17%、19%、20%、22%、24%、26%、28%或29%等,所述颜填料的质量百分比为0-5%,例如1%、1.5%、2%、2.5%、3%、3.5%、4%或4.5%等。
本发明中,所述助剂油的质量百分比优选为15-30%,所述颜填料的质量百分比优选为0-5%,若助剂油的质量百分比过大,则压延产生的聚四氟乙烯基膜的强度不足,应用能力不强;若助剂油的质量百分比过小,则推挤过程推挤力过大,对材料和设备均有损伤;若颜填料的质量百分比过大,则降低聚四氟乙烯超疏水透气膜本身的低表面张力、耐溶剂等优异性能。
优选地,所述含氟树脂颗粒包括聚四氟乙烯微粉、聚全氟乙丙烯(FEP)微粉或可熔性聚四氟乙烯(PFA)微粉中的任意一种或至少两种的组合,进一步优选为聚四氟乙烯微粉和可熔性聚四氟乙烯微粉的组合。
优选地,所述含氟树脂乳液包括聚四氟乙烯乳液、聚全氟乙丙烯乳液或可熔性聚四氟乙烯乳液中的任意一种或至少两种的组合,进一步优选为聚四氟乙烯乳液与聚全氟乙丙烯乳液和/或可熔性聚四氟乙烯乳液的组合。
本发明中,与聚四氟乙烯相比,聚全氟乙丙烯和可熔性聚四氟乙烯的的熔点较低,在烘干预定型步骤下,聚全氟乙丙烯和可熔性聚四氟乙烯部分熔融,与聚四氟乙烯基膜融合,将聚四氟乙烯、未熔融的聚全氟乙丙烯、未熔融的可熔性聚四氟乙烯牢牢地粘附在聚四氟乙烯基膜上,形成凹凸不平的结构,所制得的聚四氟乙烯超疏水透气膜的疏水效果更好。
优选地,所述含氟树脂包括含氟树脂颗粒和含氟树脂乳液的组合,进一步优选为聚四氟乙烯微粉和含氟树脂乳液的组合。
优选地,所述含氟树脂颗粒的粒径为0.2-25μm,例如0.2μm、0.5μm、1μm、5μm、12μm、15μm、17μm或25μm等。
本发明中,所述含氟树脂颗粒的粒径优选为0.2-25μm,经涂覆烘干,使聚四氟乙烯基膜表面形成具有-CF2、-CF3基团的微-纳粗糙结构,若含氟树脂颗粒的粒径过大,则颗粒尺度过大,不易形成微-纳结构,制得的聚四氟乙烯超疏水透气膜的疏水性能下降。
优选地,所述含氟树脂乳液的粒径为0.02-0.5μm,例如0.05μm、0.1μm、0.15μm、0.2μm、0.25μm、0.3μm、0.4μm或0.45μm等,固含量为1%-65%,例如2%、5%、10%、15%、20%、25%、30%、40%、45%、50%、55%或60%等。
本发明中,所述含氟树脂乳液的粒径优选为0.02-0.5μm,经涂覆烘干,使聚四氟乙烯基膜表面形成具有-CF2、-CF3基团的微-纳粗糙结构。
优选地,所述涂覆物还包括无机纳米颗粒。
本发明中,所述涂覆物还包括无机纳米颗粒,无机纳米颗粒可以增加含氟树脂形成的微纳表面的纳米尺度的结构,示例性地,所述涂覆物为含氟树脂颗粒和无机纳米颗粒的混合物或含氟树脂乳液和无机纳米颗粒的混合物。
优选地,以涂覆物的总质量为100%计,所述无机纳米颗粒的质量百分比为0~10%,例如1%、2%、3%、4%、5%、6%、7%、8%或9%等。
本发明中,若无机纳米颗粒的质量百分比过大,则无机纳米颗粒过多,不易沾附在基膜上,纳米颗粒易脱落,无法增加疏水性能。
优选地,所述涂覆物在聚四氟乙烯基膜上的涂覆厚度为0.02-50μm,例如0.02μm、0.05μm、0.1μm、0.5μm、1μm、10μm、20μm、30μm、40μm或45μm等。
本发明中,若涂覆厚度过厚,则增加制造成本;若涂覆厚度过薄,则表面粗糙程度不足,无超疏水性能。
第二方面,本发明提供一种如第一方面所述的制备方法制备得到的聚四氟乙烯超疏水透气膜。
优选地,所述聚四氟乙烯超疏水透气膜的水接触角≥150°,例如151°、152°、153°、154°、155°、156°、157°、158°或159°等。
第三方面,本发明提供一种如第二方面所述的聚四氟乙烯超疏水透气膜在防水透气膜或防油透气膜中的应用。
相对于现有技术,本发明具有以下有益效果:
本发明通过采用聚四氟乙烯分散树脂和助剂油制备聚四氟乙烯基膜,再经加热除去助剂油,涂覆涂覆物,然后烘干预定型,拉伸,热定型,制备得到具有微孔和表面粗糙结构的聚四氟乙烯超疏水透气膜,本发明所述制备方法制得的聚四氟乙烯超疏水透气膜具有表面超疏水,透气性好,制备工艺简单的特点。本发明所述聚四氟乙烯超疏水透气膜的水接触角≥150°,优选情况下,所述聚四氟乙烯疏水膜的水接触角为156°-158°。
具体实施方式
下面通过具体实施方式来进一步说明本发明的技术方案。本领域技术人员应该明了,所述实施例仅仅是帮助理解本发明,不应视为对本发明的具体限制。
实施例1
本实施例提供一种聚四氟乙烯超疏水透气膜及其制备方法,所述聚四氟乙烯超疏水透气膜采用如下方法制备得到:
(1)将聚四氟乙烯分散树脂(厂家:大金,牌号:F104)、助剂油(200#溶剂油)和颜填料(纳米二氧化钛,粒径为25nm)混合,在30℃熟化12h,预压成型,推挤,压延,得到聚四氟乙烯基膜;
其中,以聚四氟乙烯分散树脂、助剂油和颜填料的总质量为100%计,所述聚四氟乙烯分散树脂的质量百分比为78%,助剂油的质量百分比为21%,颜填料的质量百分比为1%。
(2)将步骤(1)得到的聚四氟乙烯基膜在200℃加热0.5h使助剂油挥发干净,将聚四氟乙烯微粉(厂家:大金,牌号:M12,粒径为25μm)和无机纳米颗粒(纳米二氧化钛,粒径为25nm)混合得到涂覆物,所述涂覆物中无机纳米颗粒的质量百分比为2%,压力喷涂在加热后的聚四氟乙烯基膜上,喷涂厚度为30μm,320℃烘干0.1h,单向拉伸,342℃热定型200s,得到所述聚四氟乙烯超疏水透气膜。
实施例2
本实施例提供一种聚四氟乙烯超疏水透气膜及其制备方法,其与实施例1的区别仅在于,步骤(1)不添加颜填料,聚四氟乙烯分散树脂质量百分比调整为79%,步骤(2)不添加无机纳米颗粒,其他与实施例1相同。
实施例3
本实施例提供一种聚四氟乙烯超疏水透气膜及其制备方法,其与实施例1的区别仅在于,步骤(2)不添加无机纳米颗粒,其他与实施例1相同。
实施例4
本实施例提供一种聚四氟乙烯超疏水透气膜及其制备方法,其与实施例1的区别仅在于,步骤(2)将聚四氟乙烯微粉(厂家:大金,牌号:M12,粒径为25μm)替换成同质量的聚四氟乙烯乳液(厂家:科慕,牌号:DISP35,固含量为35%,粒径为0.245μm),其他与实施例1相同。
实施例5
本实施例提供一种聚四氟乙烯超疏水透气膜及其制备方法,其与实施例1的区别仅在于,步骤(2)将聚四氟乙烯微粉(厂家:大金,牌号:M12,粒径为25μm)替换成同质量的聚四氟乙烯乳液(厂家:科慕,牌号:DISP35,固含量为25%,粒径为0.2μm)和聚四氟乙烯微粉(厂家:大金,牌号:M12,粒径为25μm)的组合,涂覆物中聚四氟乙烯微粉的质量百分比为20%,聚四氟乙烯乳液的质量百分比为78%,其他与实施例1相同。
实施例6
本实施例提供一种聚四氟乙烯超疏水透气膜及其制备方法,其与实施例5的区别仅在于,步骤(2)将聚四氟乙烯乳液(厂家:科慕,牌号:DISP35,固含量为25%,粒径为0.2μm)替换成同质量的可熔性聚四氟乙烯乳液(厂家:科慕,牌号:335D,固含量为60%,粒径为0.2μm),其他与实施例5相同。
实施例7
本实施例提供一种聚四氟乙烯疏水膜及其制备方法,其与实施例5的区别仅在于,步骤(2)将聚四氟乙烯乳液(厂家:科慕,牌号:DISP35,固含量为25%,粒径为0.2μm)替换成同质量的聚全氟乙丙烯乳液(厂家:科慕,牌号:D121,固含量为55%,粒径为0.18μm),其他与实施例5相同。
实施例8
本实施例提供一种聚四氟乙烯超疏水透气膜及其制备方法,所述聚四氟乙烯超疏水透气膜采用如下方法制备得到:
(1)将聚四氟乙烯分散树脂(厂家:大金,牌号:F104)、助剂油(200#溶剂油)和颜填料(纳米二氧化钛,粒径为25nm)混合,在40℃熟化10h,预压成型,推挤,压延,得到聚四氟乙烯基膜;
其中,以聚四氟乙烯分散树脂、助剂油和颜填料的总质量为100%计,所述聚四氟乙烯分散树脂的质量百分比为67%,助剂油的质量百分比为30%,颜填料的质量百分比为3%。
(2)将步骤(1)得到的聚四氟乙烯基膜在100℃加热3h使助剂油挥发干净,将聚四氟乙烯微粉(厂家:大金,牌号:M12,粒径为25μm)和无机纳米颗粒(纳米二氧化钛,粒径为25nm)的混合得到涂覆物,所述涂覆物中无机纳米颗粒的质量百分比为5%,静电喷涂在加热后的聚四氟乙烯基膜上,喷涂厚度为50μm,100℃烘干0.5h,双向拉伸,360℃热定型300s,得到所述聚四氟乙烯超疏水透气膜。
实施例9
本实施例提供一种聚四氟乙烯超疏水透气膜及其制备方法,所述聚四氟乙烯超疏水透气膜采用如下方法制备得到:
(1)将聚四氟乙烯分散树脂(厂家:大金,牌号:F104)、助剂油(200#溶剂油)和颜填料(纳米二氧化钛,粒径为25nm)混合,在60℃熟化8h,预压成型,推挤,压延,得到聚四氟乙烯基膜。
其中,以聚四氟乙烯分散树脂、助剂油和颜填料的总质量为100%计,所述聚四氟乙烯分散树脂的质量百分比为80%,助剂油的质量百分比为15%,颜填料的质量百分比为5%。
(2)将步骤(1)得到的聚四氟乙烯基膜在300℃加热0.1h使助剂油挥发干净,将聚四氟乙烯微粉(厂家:大金,牌号:M12,粒径为25μm)和无机纳米颗粒(纳米二氧化钛,粒径为25nm)的混合得到涂覆物,所述涂覆物中无机纳米颗粒的质量百分比为10%,静电喷涂在加热后的聚四氟乙烯基膜上,喷涂厚度为30μm,250℃烘干0.2h,双向拉伸,390℃热定型100s,得到所述聚四氟乙烯超疏水透气膜。
实施例10
本实施例提供一种聚四氟乙烯超疏水透气膜及其制备方法,其与实施例1的区别仅在于,步骤(2)将聚四氟乙烯微粉(厂家:大金,牌号:M12,粒径为25μm)替换成同质量的聚四氟乙烯微粉(厂家:大金,牌号:M12,粒径为25μm)和可熔性聚四氟乙烯微粉(厂家:大金,牌号:AC5500,粒径为20μm)的组合,聚四氟乙烯微粉和可熔性聚四氟乙烯微粉的质量比为1:1,其他与实施例1相同。
实施例11
本实施例提供一种聚四氟乙烯疏水膜及其制备方法,其与实施例1的区别仅在于,步骤(2)将聚四氟乙烯微粉(厂家:大金,牌号:M12,粒径为25μm)替换成同质量的可熔性聚四氟乙烯微粉(厂家:大金,牌号:AC5500,粒径为20μm),其他与实施例1相同。
对比例1
本对比例提供一种聚四氟乙烯超疏水透气膜及其制备方法,其与实施例1的区别仅在于,步骤(2)不包括将聚四氟乙烯微粉(厂家:大金,牌号:M12,粒径为25μm)和无机纳米颗粒(纳米二氧化钛,粒径为25nm)混合得到涂覆物,所述涂覆物中无机纳米颗粒的质量百分比为2%,压力喷涂在加热后的聚四氟乙烯基膜上,喷涂厚度为30μm的步骤,其他与实施例1相同
对比例2
本对比例提供一种聚四氟乙烯超疏水透气膜及其制备方法,其与实施例1的区别仅在于,步骤(2)不包括拉伸的步骤,其他与实施例1相同
对实施例和对比例提供的聚四氟乙烯超疏水透气膜进行如下性能测试。
疏水性能:按照GB/T30693-2014进行疏水性能测试,测试水接触角。
测试结果如表1所示。
表1
根据表1测试结果可知,实施例1-11提供的聚四氟乙烯超疏水透气膜的水接触角为152°-158°;实施例5-7、10-11提供的聚四氟乙烯疏水膜的水接触角为156°-158°。
与实施例1对比,若不添加无机纳米颗粒(实施例3),则水接触角降低,疏水性能下降,证明添加无机纳米颗粒制备得到的聚四氟乙烯超疏水透气膜的疏水性能更佳。
与实施例1对比,若涂覆物包括聚四氟乙烯乳液、聚四氟乙烯微粉和无机纳米颗粒(实施例5),则水接触角增加,疏水性能提高,证明含氟树脂包括含氟树脂颗粒和含氟树脂乳液制备得到的聚四氟乙烯超疏水透气膜的疏水性能更佳。
与实施例1对比,若将聚四氟乙烯微粉替换成同质量的聚四氟乙烯微粉和可熔性聚四氟乙烯微粉的组合(实施例10),则水接触角增加,疏水性能提高,证明含氟树脂为聚四氟乙烯微粉和可熔性聚四氟乙烯微粉制备得到的聚四氟乙烯超疏水透气膜的疏水性能更佳。
与实施例1对比,若步骤(2)不包括压力喷涂涂覆物的步骤(对比例1),则聚四氟乙烯超疏水透气膜的水接触角为135°,疏水性能下降,不具有超疏水性。
与实施例1对比,若步骤(2)不包括拉伸的步骤(对比例2),则聚四氟乙烯超疏水透气膜中无法产生微纳米级别的纤维结构,无透气性,且水接触角降低,疏水性能下降。
申请人声明,本发明通过上述实施例来说明本发明的一种聚四氟乙烯超疏水透气膜及其制备方法和应用,但本发明并不局限于上述实施例,即不意味着本发明必须依赖上述实施例才能实施。所属技术领域的技术人员应该明了,对本发明的任何改进,对本发明产品各原料的等效替换及辅助成分的添加、具体方式的选择等,均落在本发明的保护范围和公开范围之内。
Claims (10)
1.一种聚四氟乙烯超疏水透气膜的制备方法,其特征在于,所述制备方法包括如下步骤:
(1)将聚四氟乙烯分散树脂和助剂油混合,熟化,预压成型,推挤,压延,得到聚四氟乙烯基膜;
(2)将步骤(1)得到的聚四氟乙烯基膜加热除去助剂油,涂覆涂覆物,烘干预定型,拉伸,热定型,得到所述聚四氟乙烯超疏水透气膜;
所述涂覆物包括含氟树脂,所述含氟树脂包括含氟树脂颗粒和/或含氟树脂乳液。
2.根据权利要求1所述的制备方法,其特征在于,步骤(1)所述熟化的温度为30-60℃,熟化的时间≥8h;
优选地,步骤(2)所述加热的温度为100-300℃;
优选地,步骤(2)所述涂覆包括刷涂、压力喷涂、静电喷涂、溅射或沉积中的任意一种;
优选地,步骤(2)所述烘干预定型的温度为100-320℃;
优选地,步骤(2)所述拉伸包括单向拉伸或双向拉伸;
优选地,步骤(2)所述热定型的温度为342-390℃,时间为1-300s。
3.根据权利要求1或2所述的制备方法,其特征在于,所述助剂油包括石脑油、溶剂油或石蜡油中的任意一种或至少两种的组合;
优选地,步骤(1)所述混合前还包括加入颜填料;
优选地,以所述聚四氟乙烯分散树脂、助剂油和颜填料的总质量为100%计,所述助剂油的质量百分比为15-30%,所述颜填料的质量百分比为0-5%。
4.根据权利要求1-3任一项所述的制备方法,其特征在于,所述含氟树脂颗粒包括聚四氟乙烯微粉、聚全氟乙丙烯微粉或可熔性聚四氟乙烯微粉中的任意一种或至少两种的组合,进一步优选为聚四氟乙烯微粉和可熔性聚四氟乙烯微粉的组合;
优选地,所述含氟树脂乳液包括聚四氟乙烯乳液、聚全氟乙丙烯乳液或可熔性聚四氟乙烯乳液中的任意一种或至少两种的组合,进一步优选为聚四氟乙烯乳液与聚全氟乙丙烯乳液和/或可熔性聚四氟乙烯乳液的组合;
优选地,所述含氟树脂包括含氟树脂颗粒和含氟树脂乳液,进一步优选为聚四氟乙烯微粉和含氟树脂乳液的组合。
5.根据权利要求1-4任一项所述的制备方法,其特征在于,所述含氟树脂颗粒的粒径为0.2-25μm;
优选地,所述含氟树脂乳液的粒径为0.02-0.5μm,固含量为1%-65%。
6.根据权利要求1-5任一项所述的制备方法,其特征在于,所述涂覆物还包括无机纳米颗粒;
优选地,以涂覆物的总质量为100%计,所述无机纳米颗粒的质量百分比为0~10%。
7.根据权利要求1-6任一项所述的制备方法,其特征在于,所述涂覆物在聚四氟乙烯基膜上的涂覆厚度为0.02-50μm。
8.一种如权利要求1-7中任一项所述的制备方法制备得到的聚四氟乙烯超疏水透气膜。
9.根据权利要求8所述的聚四氟乙烯超疏水透气膜,其特征在于,所述聚四氟乙烯超疏水透气膜的水接触角≥150°。
10.一种如权利要求8或9所述的聚四氟乙烯超疏水透气膜在防水透气膜或防油透气膜中的应用。
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