title: Properties of rosin-based waterborne polyurethanes/cellulose nanocrystals composites.
abstract: Polymers from renewable biomass are viable supplements for synthetic polymers. In this study, cellulose nanocrystals (CNs) were used as nanofillers to improve properties of rosin-based waterborne polyurethanes (RWPU). The morphology, structure, thermal, and mechanical properties of the RWPU/CNs nanocomposites were investigated. It demonstrated that CNs were compatible with RWPU and dispersed homogeneously in the polymer matrix. CNs as nanofillers improved tensile strength of RWPU significantly. Tensile strength of RWPU/CNs composite films increased from 28.2 to 52.3 MPa with increasing CNs amount from 0 to 20 wt%. Moreover, the thermal stability of RWPU was also improved by CNs and the glass transition temperature of RWPU/CNs decreased comparing with RWPU. This work provided a novel pathway for preparation of biomass-based WPU with excellent properties from cellulose and rosin.
authors.affiliation: Institute of Chemical Industry of Forestry Products, Chinese Academy of Forestry, Key Laboratory of Biomass Energy and Material, National Engineering Laboratory for Biomass Chemical Utilization, Key and Laboratory on Forest Chemical Engineering, SFA, Nanjing 210042, Jiangsu Province, China.
authors.forename: He
authors.initials: H
authors.lastname: Liu
authors.forename: Shuqin
authors.initials: S
authors.lastname: Cui
authors.forename: Shibin
authors.initials: S
authors.lastname: Shang
authors.forename: Dan
authors.initials: D
authors.lastname: Wang
authors.forename: Jie
authors.initials: J
authors.lastname: Song
mesh_terms: D002482:Cellulose / Q000737:chemistry*; D053758:Nanoparticles / Q000737:chemistry*; D011140:Polyurethanes / Q000737:chemistry*; D012116:Resins, Plant / Q000737:chemistry*; D013696:Temperature; D013718:Tensile Strength
chemical_list: D011140:Polyurethanes; D012116:Resins, Plant; C013893:rosin; D002482:Cellulose