Thermoset nanocomposites from two-component waterborne polyurethanes and cellulose whiskers.
We prepared thermoset nancomposites from biomass-based two-component waterborne polyurethane (2K-WPU) and cellulose namowhiskers (CNWs). Due to the formation of hydrogen bonds, the viscosity of 2K-WPU dispersion was found to be increased with the addition of CNWs. SEM images showed "sea-island structure" corresponding to the microphase separation between CNWs nano-filler and the 2K-WPU matrix. The α-relaxation temperature (Tα) and glass transition temperature (Tg) increased with the increase of CNWs content, which was due to the formation of a rigid CNWs nano-phase acting as crosslinking points in the 2K-WPU matrix. Mechanical properties from tensile test showed Young's modulus and tensile strength of 2K-WPU/CNWs nanocomposites were reinforced by the addition of CNWs. Thermo-stability of 2K-WPU/CNWs nanocomposites decreased slightly with the increase of CNWs content, which could be attributed to the increased thermal conductivity of the material after adding CNWs.
Institute of Chemical Industry of Forest Products, Chinese Academy of Forestry; Key Laboratory of Biomass Energy and Material of Jiangsu Province; Key and Open Laboratory on Forest Chemical Engineering, State Forestry Administration; National Engineering Laboratory for Biomass Chemical Utilization, Nanjing 210042, China; Research Institute of New Technology, Chinese Academy of Forestry, Beijing 10091, China. Electronic address: woogm@hotmail.com.
Guo-min
GM
Wu
Institute of Chemical Industry of Forest Products, Chinese Academy of Forestry; Key Laboratory of Biomass Energy and Material of Jiangsu Province; Key and Open Laboratory on Forest Chemical Engineering, State Forestry Administration; National Engineering Laboratory for Biomass Chemical Utilization, Nanjing 210042, China.
Jian
J
Chen
Institute of Chemical Industry of Forest Products, Chinese Academy of Forestry; Key Laboratory of Biomass Energy and Material of Jiangsu Province; Key and Open Laboratory on Forest Chemical Engineering, State Forestry Administration; National Engineering Laboratory for Biomass Chemical Utilization, Nanjing 210042, China.
Shu-ping
SP
Huo
Institute of Chemical Industry of Forest Products, Chinese Academy of Forestry; Key Laboratory of Biomass Energy and Material of Jiangsu Province; Key and Open Laboratory on Forest Chemical Engineering, State Forestry Administration; National Engineering Laboratory for Biomass Chemical Utilization, Nanjing 210042, China; Research Institute of New Technology, Chinese Academy of Forestry, Beijing 10091, China.
Gui-feng
GF
Liu
Institute of Chemical Industry of Forest Products, Chinese Academy of Forestry; Key Laboratory of Biomass Energy and Material of Jiangsu Province; Key and Open Laboratory on Forest Chemical Engineering, State Forestry Administration; National Engineering Laboratory for Biomass Chemical Utilization, Nanjing 210042, China; Research Institute of New Technology, Chinese Academy of Forestry, Beijing 10091, China.
Zhen-wu
ZW
Kong
D018533:Biomass; D002482:Cellulose / Q000737:chemistry*; D055119:Elastic Modulus; D006860:Hydrogen Bonding; D053761:Nanocomposites / Q000737:chemistry* / Q000648:ultrastructure; D011140:Polyurethanes / Q000737:chemistry*; D012212:Rheology; D013696:Temperature; D013718:Tensile Strength; D013814:Thermal Conductivity; D044366:Transition Temperature; D014425:Turpentine / Q000737:chemistry; D014783:Viscosity
D011140:Polyurethanes; D002482:Cellulose; D014425:Turpentine
Cellulose nanowhiskers; Nanocomposite; Turpentine; Two-component waterborne polyurethanes