Structure generation in PTFE porous membranes induced by the uniaxial and biaxial stretching operations

Kurumada, Ken-ichi; Kitamura, Taketo; Fukumoto, Naohiro; Oshima, Masahiro; Tanigaki, M.; Kanazawa, Susumu

doi:10.1016/s0376-7388(98)00179-3

Cited by 91 publications

(37 citation statements)

References 5 publications

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“…and Qtaishat et al [7]. Various methods have been used for preparation of membranes with optimized pore size, porosity and tortuosity: stretching [8], thermally induced phase separation (TIPS) [9], non-solvent induced phase separation (NIPS) [10,11], and plasma assisted polymerization [12,13]. Microporous polymeric membranes such as poly(vinylidenefluoride) (PVDF), polypropylene (PP), and polytetrafluoroethylene (PTFE) have a low surface energy and high hydrophobicity [1].…”

Section: Introductionmentioning

confidence: 99%

CF4 plasma modified highly interconnective porous polysulfone membranes for direct contact membrane distillation (DCMD)

et al. 2015

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Section: Introductionmentioning

confidence: 99%

CF4 plasma modified highly interconnective porous polysulfone membranes for direct contact membrane distillation (DCMD)

et al. 2015

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“…Pore size regulation is highly specific to the material, the conditions, and the tearing speed. [46] However, adaption toward new pore sizes or materials require detailed studies. [47] Commercially, the process is used for the production of expanded polytetrafluoroethylene (ePTFE) that is sold by W. L. Gore & Associates in their products (e.g., GORE-TEX 1 membranes) and for Celgard 1 , as shown in Figure 3.…”

Section: Tearingmentioning

confidence: 99%

Porous Polymer Membranes by Hard Templating – A Review

2017

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Membranes are designed to bridge a precise separation process at the nanoscale with industrial applications running at cubic meters per hour. This review outlines materials applied in membrane production with a particular focus on polymers. Membrane performance and created value are directly linked to controlled pore formation. Their economic relevance has created a number of large companies and associated academic research at top institutions. The authors review, therefore, starts from well-established techniques applied in products and then moves on to evolving concepts from academia. Pore formation through hard templating is a versatile field for separation processes. A more detailed view is given on the two known concepts for nanopore formation, namely colloidal templates and random hard salt templating. A comparison between these two concepts underlines their relevance to combine a process specific separation with large scale manufacturing requirements (i.e., upscale possibility, flexible process control and environmental impact).

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“…Furthermore, the membranes with enhanced permeability, selectivity, and reduced bio-fouling have been achieved through the incorporation of organic/inorganic nanomaterials [20]. The main drawbacks associated with PVDF membranes are high hydrophobicity, high shrinkage, and reduced porosity of the membranes, thus decreasing the pure water flux [21,22].…”

Section: Iran Polymer Andmentioning

confidence: 99%

High-performance polyvinylidene fluoride/poly(styrene–butadiene–styrene)/functionalized MWCNTs-SCN-Ag nanocomposite membranes

2015

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content on membrane performance and structure was studied using pertinent methods and techniques. Percentage of water content of PVDF/SBS-MWCNTs-SCN 0.01-0.1 was estimated around 1.08-2.80 % and this value was further increased to 1.94-4.65 % in silver nanoparticle-modified system. Moreover, the porosity of silver nanoparticle-modified system was found superior compared with the other composites. Pure water flux, salt rejection, and recovery were also found optimal for 0.05 wt% silver nanoparticlebased modified system. According to the consequences, novel membranes have fine nano-filtration characteristics to be utilized in advance water treatment industrial units.

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Structure generation in PTFE porous membranes induced by the uniaxial and biaxial stretching operations

Cited by 91 publications

References 5 publications

CF4 plasma modified highly interconnective porous polysulfone membranes for direct contact membrane distillation (DCMD)

CF4 plasma modified highly interconnective porous polysulfone membranes for direct contact membrane distillation (DCMD)

Porous Polymer Membranes by Hard Templating – A Review

High-performance polyvinylidene fluoride/poly(styrene–butadiene–styrene)/functionalized MWCNTs-SCN-Ag nanocomposite membranes

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