Flavonoids from Peony Seed Meal by Nanofiltration Membrane Separation
Table 1
Physical properties of membranes.
Sample
Pore size (mm)
Porosity (%)
Advantage
Shortcoming
Manufacturer
PP
0.22
Low density, good mechanical properties, easy to form.
Its hydrophobicity and surface inertia affect the practical application of some aspects, such as the surface being easy to cause protein and platelet adhesion and easily causing a bacterial infection.
Zhejiang, P. R. China
PVDF
0.22
It has good mechanical properties, film-forming properties, excellent corrosion resistance, and chemical stability.
It burns with fluorine smoke and is not easy to bond.
Zhejiang, P. R. China
CA
0.22
Rich source, low price, good film formation, and biocompatibility.
The elongation at break is lower under dry conditions, and the texture is brittle.
Zhejiang, P. R. China
PES
0.22
Excellent heat resistance, physical and mechanical properties, and insulation properties.
In the treatment of wastewater, the driving force is high and it is easy to pollute, thus reducing the separation efficiency, increasing the operating cost of equipment, and shortening the service life of the membrane.
Zhejiang, P. R. China
PA
0.22
Good mechanical properties, good wear resistance, good chemical stability, and strong solvent resistance.
Affected by temperature and water absorption, it has general weather resistance and poor thermal stability.
