| 英文摘要 |
Nowadays, more than 100 thousand waste tires are generated annually in Taiwan. This causes two major problems: the wastage of valuable rubbers and the disposal of waste tires leading to environmental pollution. Two major approaches to solve this problem are the recycle and the reuse of waste tire, and the reclaim of rubber raw materials. The waste tire, rubber, is one kind of thermosetting materials, which is cross-linked on processing and molding, and therefore cannot be softened or remolding by heating again. Thus, the technology for recycle of thermoset polymers (waste tire) is complex and less viable commercially.
However, recently, Reclaiming of rubber by physical, chemical, biotechnological, and de-link processes have been developed. Reclaiming of scrap rubber products is the conversion of a three dimensionally interlinked, insoluble and infusible strong thermoset polymer to a two dimensional, soft, plastic, tackier, low modulus and vulvanizable essentially thermoplastic product, reclaimed rubber.
Reusing or incorporation of reclaim rubber into new rubber compound, not only reduces the cost of the finished product but also saves our united resource of fossil feed stock. In this project, the reusing of reclaimed rubber for preparing polymer membrane was investigated and applied in CO2 separation and H2 purification. In this work, the reclaimed rubber is used as precursor to fabricate polymer membrane or blend polymer membrane. The effects of additives, casting dope composition, phase inversion method on the membrane morphology and permeability were investigated. The membrane morphology, surface roughness, d-spacing, thermal properties were analyzed by SEM, AFM, XRD, and TGA.
The results indicates that the reclaim rubber can be used as the precursor for polymeric membrane fabrication directly due to some crosslink structure are still remaining after de-link treatment. The optimum conditions determined were as follows: using toluene as solvent to prepare casting dope, and then following by casting and dry phase inversion. The optimum conditions resulted in a CO2/N2 selectivity of 11.6.
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