PTFE (polytetrafluoroethylene) separation material
A technology of polytetrafluoroethylene and separation materials, applied in the direction of semi-permeable membrane separation, total evaporation, membrane, etc., can solve the problems of short service life, high cost of use, easy damage, etc., achieve strong fiber form, and improve durability , the effect of preventing collapse
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Embodiment 1
[0019] The polytetrafluoroethylene separation material of this embodiment has a three-dimensional interconnected pore structure, and is characterized in that: there are stem holes on the stems surrounding the pores; the total surface area of the stems, stem area:stem hole area=1-30:1 The pore diameter is 200-1000nm; the stem diameter is 200-500nm, and the stem pore diameter is not less than 100nm and less than 200nm.
[0020] Pore diameter, stem diameter, and porosity were detected by nano-CT.
[0021] Stem surface area image analysis: photographs of the material were taken with a scanning electron microscope (SEM photographs, magnified 10000-50000 times). Scan this photo with image processing equipment (the television image processor TVIP-4100II that Japan Avionics company produces, the television image processor that Latock system engineering company provides) stem and stem hole are separated to obtain stem and stem hole image, The image is processed by software to obta...
Embodiment 2
[0028] The PTFE material of this embodiment has a three-dimensional penetrating pore structure, and there are stem holes on the stems surrounding the pores, 300nm<pore diameter<600nm, 200nm<stem diameter<400nm, 100nm<stem hole diameter<150nm.
[0029] Wherein (I) the porosity of the pores is 60±10%, the porosity of the stem pores is 55±10%; the total surface area of the stems, stem area:stem hole area=1-15:1.
[0030] Or (II) the porosity of the pores is 60±10%, and the porosity of the stem pores is 55±10%; the total surface area of the stem, stem area:stem hole area=16-30:1.
[0031] Or (Ⅲ) the porosity of the pores is 80±10%, and the porosity of the stem pores is 30±15%; the total surface area of the stem, stem area:stem hole area=1-15:1.
[0032] Or (IV) The porosity of the pores is 80±10%, and the porosity of the stem pores is 30±15%; the total surface area of the stem, stem area:stem hole area=16-30:1.
[0033] The porosity of the material = the porosity of the p...
Embodiment 3
[0042] The PTFE material of this embodiment has a three-dimensional penetrating pore structure. There are stem holes on the stems surrounding the pores. The pore diameter is 450±10 nm, the stem diameter is 300±10 nm, and the stem hole diameter is 125±5 nm.
[0043] Wherein (I) the porosity of the pores is 60%, and the porosity of the stem pores is 55%; the total surface area of the stem, stem area:stem hole area=8:1.
[0044]Or (II) the porosity of the pores is 60%, and the porosity of the stem pores is 55%; the total surface area of the stem, stem area:stem hole area=24:1.
[0045] Or (Ⅲ) The porosity of the pores is 80%, and the porosity of the stem pores is 30%; the total surface area of the stem, stem area: stem hole area = 8:1.
[0046] Or (IV) The porosity of the pores is 80%, and the porosity of the stem pores is 30%; the total surface area of the stem, stem area:stem pore area=24:1.
[0047] Porosity of material = porosity of pores + (1 - porosity of pores) * ...
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