CN203154874U - 油水分离用聚四氟乙烯微孔过滤薄膜 - Google Patents

油水分离用聚四氟乙烯微孔过滤薄膜 Download PDF

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CN203154874U
CN203154874U CN 201320053444 CN201320053444U CN203154874U CN 203154874 U CN203154874 U CN 203154874U CN 201320053444 CN201320053444 CN 201320053444 CN 201320053444 U CN201320053444 U CN 201320053444U CN 203154874 U CN203154874 U CN 203154874U
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filtration film
millipore filtration
film
ptfe
water
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黄磊
黄斌香
侯成成
顾榴俊
吕玲
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Shanghai JinYou Fluorine Materials Co Ltd
Shanghai Lingqiao Environmental Protection Equipment Works Co ltd
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LINGQIAO ENVIRONMENTAL PROTECTION EQUIPMENT FACTORY CO Ltd SHANGHAI
SHANGHAI JINYOU FLUORINE MATERIALS CO Ltd
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Abstract

一种油水分离用聚四氟乙烯微孔过滤薄膜。它包括聚四氟乙烯微孔过滤薄膜本体,所述的聚四氟乙烯微孔过滤薄膜本体为由三维立体拉伸工艺制备而成的聚四氟乙烯微孔过滤薄膜,其特征在于所述的聚四氟乙烯微孔过滤薄膜的孔径为25-75μm,孔隙率为80-97%,厚度为100-200μm。所述的聚四氟乙烯微孔过滤薄膜的长度为1000-2000米,宽幅为2.3m。所述的聚四氟乙烯微孔过滤薄膜的耐静水压力为20MPa,透湿量为11500g/m2·d,透气量为小于0.3ml/cm2S,与水的接触角为115°以上。本实用新型表面光滑平整,具有大量纤维状的空隙,空隙大小均匀,呈现多层结构,当含有油的污水到达膜的表面时,油可通过膜的表面,而水则不能通过膜的表面,从而达到油水分离。本实用新型可适宜于油水分离中应用。

Description

油水分离用聚四氟乙烯微孔过滤薄膜
技术领域
本实用新型涉及一种过滤膜,特别是涉及一种油水分离用聚四氟乙烯微孔过滤薄膜。
背景技术
随着日常生活中含油废水的大量排放和海上原油泄漏事故的频繁发生,人类赖以生存的水源遭到了严重的破坏,从而对人们的身体健康和大自然生物的多样性带来不利影响,引起了社会各界的强烈关注。油水分离技术涉及到化工、材料以及环保等多个领域,传统的油水分离的方法主要有沉降法、吸附法、气浮分离法、离心分离法、聚结法和破乳法等,它们各自都存在许多缺陷,有的分离效率不高,适用范围有限,有的化学试剂添加容易造成二次污染,还有的能耗过高,设备费用高昂,不利于大面积推广。
近几年来,随着膜技术的不断发展,特别是有机(高分子或聚合物)膜、无机膜和复合膜的出现使油水分离膜在水处理中具有越来越大的优势。油水分离膜首先从气相和液相悬浮液中截留微粒、细菌及其它污染物,然后将油或水以达到净化、分离和浓缩等目的。
其中,无机陶瓷膜发展迅速,尤其是氧化铝膜使用最为广泛,近来的新研究则注重二氧化钛膜、二氧化硅膜、二氧化锆膜及其复合膜。陶瓷膜的优点很多:能承受高温、高压,抗化学药剂能力强,机械强度高,受pH 值影响小,抗污染,寿命长等。但陶瓷膜制备成本高,膜孔不易小孔径化,可选用的材料种类较有机膜少得多。
另外,近年来还出现具有超疏水与超亲油功能的油水分离网膜或油水分离网。虽然这些分离网膜都达到了油水分离的效果,但是都各自存在一定的缺点。有的制备过程复杂,有的需要添加多种化学试剂,同时这些油水分离网膜的制备都需要添加如钢网、铜网、尼龙网等其他织物网作为支撑,增加了制作成本,另外膜与网的粘附强度也不能保证,同时油水分离网膜本身所用的材料也多为化工合成的高分子材料,不易降解,材料本身的亲油性,使得网膜极易被油污污染,分离使用后,不易处理,通常使用焚烧、掩埋的处理方法又会造成环境的二次污染等问题。
发明内容
本实用新型的目的是要提供一种油水分离用聚四氟乙烯微孔过滤薄膜,它不但能有效实现油水分离,而且使用方便,无二次污染等问题存在。
本实用新型的目的是这样实现的: 本实用新型的油水分离用聚四氟乙烯微孔过滤薄膜包括聚四氟乙烯微孔过滤薄膜本体,所述的聚四氟乙烯微孔过滤薄膜本体为由三维立体拉伸工艺制备而成的聚四氟乙烯微孔过滤薄膜,所述的聚四氟乙烯微孔过滤薄膜的孔径为25-75μm,孔隙率为80-97%,厚度为100-200μm。
所述的聚四氟乙烯微孔过滤薄膜的长度为1000-2000米,宽幅为2.3m。
所述的聚四氟乙烯微孔过滤薄膜的耐静水压力为20MPa,透湿量为11500g/m2·d,透气量为小于0.3ml/cm2S,与水的接触角为115°以上。
由于本实用新型的油水分离用聚四氟乙烯微孔过滤薄膜采用三维立体拉伸工艺制备而成的聚四氟乙烯微孔过滤薄膜,且其具有微孔结构的聚四氟乙烯微孔过滤薄膜表面光滑平整,均匀性很好,并聚四氟乙烯微孔过滤薄膜表面具有大量纤维状的空隙,空隙大小均匀,呈现多层结构,当含有油的污水到达膜的表面时,油可以轻松通过膜的表面,而水则不能通过膜的表面,从而达到油水分离的功能。
本实用新型的油水分离用聚四氟乙烯微孔过滤薄膜具有以下特点:
1、本实用新型的油水分离用聚四氟乙烯微孔过滤薄膜最大宽幅可达到2.3m,长度可以达到上千米甚至更长,厚度为100-200μm,可以根据工况和使用环境所适当调整,使用温度范围为-190-280℃,该膜具有良好的亲油性和优异的阻水性,当油水混合液到达薄膜表面时,油可以很轻易的通过薄膜,而水不能通过,从而达到了油水分离的作用。
2、本实用新型的油水分离用聚四氟乙烯微孔过滤薄膜具有非常优异的耐压强度,耐静水压力为20MPa,还耐酸碱腐蚀等,在使用过程不易损坏,从而保证了其较长的使用寿命。
3、本实用新型的油水分离用聚四氟乙烯微孔过滤薄膜具有极低的表面能和优异的疏水性,与水的接触角高达115°以上,因此油水中的杂质不易在膜的表面附着,便于清理。
4、本实用新型的油水分离用聚四氟乙烯微孔过滤薄膜具有良好的通透性,孔径为25-75μm,孔径大小均匀,其孔径大小可以根据所分离的油质和分离液体中杂质的不同进行调整,孔隙率高达80-97%,透湿量高达11500g/m2·d,透气量小于0.3ml/cm2S,可以保证较高的过滤效率。
本实用新型的油水分离用聚四氟乙烯微孔过滤薄膜可适宜于油水分离中用。
附图说明
本实用新型的具体结构由以下的实施例及其附图给出。
图1是本实用新型的油水分离用聚四氟乙烯微孔过滤薄膜的结构示意图。
具体实施方式
以下将结合附图对本实用新型的油水分离用聚四氟乙烯微孔过滤薄膜作进一步的详细描述。
参见图1,该实用新型的油水分离用聚四氟乙烯微孔过滤薄膜包含聚四氟乙烯微孔过滤薄膜本体,所述的聚四氟乙烯微孔过滤薄膜本体为由三维立体拉伸工艺制备而成的聚四氟乙烯微孔过滤薄膜1。
所述的聚四氟乙烯微孔过滤薄膜1的孔径为25-75μm,孔隙率为80-97%,厚度为100-200μm。
所述的聚四氟乙烯微孔过滤薄膜1的长度为1000-2000米,宽幅为2.3m。
所述的聚四氟乙烯微孔过滤薄膜1的耐静水压力为20MPa,透湿量为11500g/m2·d,透气量为小于0.3ml/cm2S,与水的接触角为115°以上。

Claims (3)

1.一种油水分离用聚四氟乙烯微孔过滤薄膜,它包括聚四氟乙烯微孔过滤薄膜本体,所述的聚四氟乙烯微孔过滤薄膜本体为由三维立体拉伸工艺制备而成的聚四氟乙烯微孔过滤薄膜(1),其特征在于所述的聚四氟乙烯微孔过滤薄膜(1)的孔径为25-75μm,孔隙率为80-97%,厚度为100-200μm。
2.根据权利要求1所述的油水分离用聚四氟乙烯微孔过滤薄膜,其特征在于所述的聚四氟乙烯微孔过滤薄膜(1)的长度为1000-2000米,宽幅为2.3m。
3. 根据权利要求1或2所述的油水分离用聚四氟乙烯微孔过滤薄膜,其特征在于所述的聚四氟乙烯微孔过滤薄膜(1)的耐静水压力为20MPa,透湿量为11500g/m2·d,透气量为小于0.3ml/cm2S,与水的接触角为115°以上。
CN 201320053444 2013-01-31 2013-01-31 油水分离用聚四氟乙烯微孔过滤薄膜 Expired - Lifetime CN203154874U (zh)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103752043A (zh) * 2014-01-20 2014-04-30 中国科学院化学研究所 用于强酸环境下的油水分离的具有锥形孔的多孔膜及其制备方法和用途

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103752043A (zh) * 2014-01-20 2014-04-30 中国科学院化学研究所 用于强酸环境下的油水分离的具有锥形孔的多孔膜及其制备方法和用途

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Granted publication date: 20130828