The Influence of Talc Addition on the Performance of Polypropylene Membranes Formed by TIPS Method

Abstract

The effect of talc addition on the morphology of capillary membranes formed by a thermally induced phase separation (TIPS) method was investigated in the presented work. The usability of such formed membranes for membrane distillation was evaluated. Two types of commercial capillary polypropylene membranes, fabricated for microfiltration process, were applied in the studies. A linear arrangement of polymer chains was obtained in the walls of membranes formed without a talc addition. In the case of membranes blended with talc, the linear structure was disordered, and a more porous structure was obtained. The changes in morphology enhanced the mechanical properties of blended membranes, and their lower thermal degradation was observed during 350 h of membrane distillation studies. Long-term studies confirmed the stability of talc dispersion in the membrane matrix. A leaching of talc from polypropylene (PP) membranes was not found during the membrane distillation (MD) process.

How does the use of a recycled polypropylene matrix influence the performance of flax/polypropylene composites compared to a virgin matrix?

“…One possible source of PE for rPP1 and rPP2 is the presence of PE induced by a sorting defect during recycling of PP or the presence of a PE phase in the composition of the sourced PP that were used to manufactured rPP1 and rPP2 11 . For vPP, the presence of talc is also evidenced in its composition (668 and 1020–1040 cm −1 ) 45 …”

“…11 For vPP, the presence of talc is also evidenced in its composition (668 and 1020-1040 cm À1 ). 45 To confirm the presence of the mineral compounds identified by IRTF SEM/EDX analysis was realized. Figure 2 presents SEM images of vPP, rPP1 and rPP2 with a Â50 or Â3000 magnification.…”

Atomic Layer Deposition for Polypropylene Film Engineering—A Review

“…This is due to their well‐controlled porosity, excellent machine suitability, low thermal and electrical conductivity, relatively narrow pore size distribution, high chemical and fatigue resistance. [ 6 ] The major applications of PP films are described in Figure 2b. PP porous films have been widely used as separation membranes for microfiltration, ultrafiltration, and membrane distillation processes.…”

Hierarchical structure and properties of high‐density polyethylene (HDPE) microporous films fabricated via thermally‐induced phase separation (TIPS): Effect of presence of ultra‐high molecular weight polyethylene (UHMWPE)

“…Lee et al prepared a composite film composed of PVDF and silicon dioxide using DOP and dibutyl phthalate (DBP) as diluents, 6 and they found the porosity of the films increased with the increase of silicon dioxide content. Gryta et al studied the effect of talcum powder on the morphology of capillary films prepared via TIPS, 7 and the addition of talc was found to greatly increase the porous structure. Zuo et al prepared PVDF films via TIPS with air and water as quenching medium, respectively, 8 and they found that films quenched in air showed larger pore size, higher permeability, and better mechanical strength than those in water.…”