“…Usually, unmodified natural filler has poor dispersion, wettability, and adhesion with thermoplastic material. In general, the good performance composites can be achieved by filler modification via alkaline treatment, 16 –18 esterification, 1,3,9,13,19 –21 silane treatment, 2,22,23 use of maleated polymer, 10,24 –27 and other chemical. 4,11 Besides, fatty acid and its derivative can be also used as green coupling agent in natural filler treatment as it acts asa coupling effect on the natural filler-based composites.…”