作者：Yaxin Qiu, Defeng Wu,* Lili Yan, Ye Zhou
关键字：spodumene slag; silica; polylactide; green composites; reinforcements.
论文来源：期刊
具体来源：RSC Advances
发表时间：2016年
RSC Advances, 2016, 6, 36942-36953.
ABSTRACT:
Nowadays
spodumene ores become an important lithium resource. The generated slag, as the new member of slag family,
would make the environmental burden mount up. Therefore, recycling of spodumene slag was studied in this
work, with the objective of exploring the possibility of spodumene slag to be
used as a common polymer filler. The microsized slag powder was firstly incorporated with polylactide
(PLA) through solution mixing, followed by the injection molding, and the
obtained composites were then studied in terms of morphology, rheological and
mechanical properties, as well as creep and degradation behavior. The results
reveal that the presence of slag powder enhances the system modulus evidently, while
maintains normal strength level of PLA. Therefore, the slag powder can be used
as a good inert filler in the polymeric material industry, with desirable
reduction of cost. Then, the slag powder was further refined into
nanoparticles, and again mixed with PLA. The results show that the presence of
those nanoparticles increases both the modulus and strength remarkably because
of their good dispersion and distribution in PLA matrix. As a result, those spodumene
slag-derived nanoparticles can be used as a good reinforcement or as the active
filler in the polymer additive industry. Both the slag powder and slag-derived
nanoparticles highly restrain creep of PLA chain, while promote degradation of
PLA remarkably. Therefore, those particles can be well used to tailor the final
properties of PLA. In addition, a modified model was developed successfully to
predict mechanical strength of as-obtained green composites. This work provides
a new way to fabricate a novel green polymer composite with controllable
performance by recycling of spodumene slag.
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http://pubs.rsc.org/en/content/articlepdf/2014/RA/C6RA03119F?page=search