Tubular composite nanofiltration membrane
A composite nanofiltration membrane and tubular technology, which is applied in the field of tubular composite nanofiltration membranes, can solve the problems of high cost, high requirements for feed liquid, and low rejection rate, and achieve cost saving, excellent separation function, and energy saving consumption effect
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[0016] Example 1
[0017] A tubular composite nanofiltration membrane is in the form of a tubular structure, and the tubular structure sequentially includes a support layer, a base membrane layer, an interface polymerization layer and a protective layer four functional layers from the outside to the inside, wherein:
[0018] The support layer is a non-woven layer or a PET layer;
[0019] The base membrane layer is a polyethersulfone ultrafiltration membrane, and the raw materials of the liquid membrane-making liquid of the polyethersulfone ultrafiltration membrane include the following materials by weight: 16% polyethersulfone, 0.2% inorganic nanometer modified material, 74% N-N solvent, 9.7% porogen and 0.1% surfactant;
[0020] The interface polymerization layer is a polyamide composite nanofiltration membrane. The raw materials of the liquid membrane-making liquid of the polyamide composite nanofiltration membrane include an aqueous solution of piperazine hexahydrate and a...
Example Embodiment
[0029] Example 2
[0030] A tubular composite nanofiltration membrane is in the form of a tubular structure, and the tubular structure sequentially includes a support layer, a base membrane layer, an interface polymerization layer and a protective layer four functional layers from the outside to the inside, wherein:
[0031] The support layer is a non-woven layer or a PET layer;
[0032] The base membrane layer is a polyethersulfone ultrafiltration membrane, and the raw materials of the liquid membrane-making liquid of the polyethersulfone ultrafiltration membrane include the following materials by weight: 25% of polyethersulfone, 2% of inorganic nano-scale modified materials, 61% solvent, 10% porogen and 2% surfactant;
[0033] The interface polymerization layer is a polyamide composite nanofiltration membrane, and the raw materials of the liquid membrane-making liquid of the polyamide composite nanofiltration membrane include an aqueous solution of piperazine hexahydrate an...
Example Embodiment
[0042] Example 3
[0043] A tubular composite nanofiltration membrane is in the form of a tubular structure, and the tubular structure sequentially includes a support layer, a base membrane layer, an interface polymerization layer and a protective layer four functional layers from the outside to the inside, wherein:
[0044] The support layer is a non-woven layer or a PET layer;
[0045] The base membrane layer is a polyethersulfone ultrafiltration membrane, and the raw materials of the liquid membrane-making liquid of the polyethersulfone ultrafiltration membrane include the following materials by weight: 20% of polyethersulfone, 1% of inorganic nano-scale modified materials, 71% solvent, 5% porogen and 3% surfactant;
[0046] The interface polymerization layer is a polyamide composite nanofiltration membrane. The raw materials of the liquid membrane-making liquid of the polyamide composite nanofiltration membrane include an aqueous piperazine hexahydrate solution and an org...
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