Use Of Nanocrystal Cellulose And Its Derivative To Prepare Poly(Butylene Succinate) Composites

Since polymer has been widely used, this new material has made our life more convenient,but it also causes the "white pollution", Especially when the overuse of fossil energy has affected the production of plastics. Biodegradable materials provide a good method to deal with the white pollution. Poly(Butylene Succinate) is one of those aliphatic polyester which can degrade 100 percent under the right circumstance. Poly(Butylene Succinate) has the advantage of less cost and being easily processed. It’s very promising to overtake traditional polymer’s place. Now most researches on PBS concentrates on the effort to improve mechanical and thermal performance.Cellulose, which exists widely in the nature and is renewable, also has the potential to overtake traditional plastics that causes white pollution. Now researches on cellulose have focused on chemical modification, natural cellulose fiber composites and its potential use for energy production. However, there are only a few papers doing researches about PBS/NCC composites. In this paper, we will discuss this thoroughly.In this paper we discuss the mechanical and thermal performance of PBS/NCC composites. We use original NCC and also modify it with succinic anhydride and Diphenyl-methane-diisocyanate (MDI).Also we use PEO aqueous solution to acquire well dispersed NCC. Those different kinds of NCC are blended with pure PBS. The results show that PEO covered NCC has the most increase on mechanical performance, increased by 70% at most compared to pure PBS. While the freezing dried NCC with the increase of 30%, chemical modified NCC also around 30%. TGA results tell that all these composites is more stable than pure PBS.XRD results show that the PBS composite with NCC and NCC derivatives doesn’t affect the crystal form of PBS, and those peaks of pure PBS all appear, telling us that they all belong to the a form. Similarly, DSC results prove that the melting process which happens upon heating of pure PBS and PBS/NCC composites are almost the same. Except for the peak of cold crystallization appears, and also the enthalpy of fusion is increased compared to pure PBS. When we freezing dry the NCC with PEO which has a molecule weight of 3.5w, the enthalpy of fusion goes up by 9.5%.We manage to improve the mechanical performance of PBS a lot by using a special freezing dry method to acquire NCC from its water solution. This research can make PBS a more useful and better product in the future.