Preparation, Structure And Properties Of Conductive Cellulose Composite Materials

In this work, cellulose was dissolved to make regenerated cellulose fims (RC) at lowtemperature. Conductive cellulose composite materials were prepared by in-situ oxidativepolymerization methods using cellulose as the template, and further studies were carried outby learning its structure and properties. This research included three main parts.1. Preparation and properties of polyaniline (PANI)/cellulose composite materialsAt first, regenerated cellulose films (RC) were prepared from cellulose/LiOH/ureasolutions. Then, conductive PANI/cellulose composite materials were prepared by in-situoxidative polymerization methods using cellulose as the template. We studied the effects ofdifferent synthesis conditions on the properties of PANI/cellulose composite materials. Theoptimized reaction conditions had been achieved as follow: aniline concentration was0.11mol/L, molar ratio of aniline to oxidant was1.0, PANI was doped by hydrochloric acid,reaction temperature was at0℃，and reaction time was7h, the electrical conductivity ofcomposites could achieve5.93×10-2S/cm. The composites had good mechanical properties(Young’s modulus was1.23GPa, and tensile strength was47.12MPa).2. Preparation and properties of polypyrrole (PPy)/cellulose composite materialsAt first, regenerated cellulose films (RC) were prepared from cellulose/LiOH/ureasolutions. Then, conductive PPy/cellulose composite materials were prepared by in-situoxidative polymerization methods using cellulose as the template. We studied the effects ofdifferent synthesis conditions on the properties of PPy/cellulose composite materials. Theoptimized reaction conditions had been achieved as follow: pyrrole concentration was0.06mol/L, molar ratio of pyrrole to oxidant was2.0, reaction temperature was at0℃，andreaction time was4h, the electrical conductivity of composites could achieve6.91×10-1S/cm.The composites had good mechanical properties (Young’s modulus was0.61GPa, and tensilestrength was24.57MPa).3. Preparation and properties of polyaniline (PANI)/silver(Ag)/cellulose composite materialsAt first, regenerated cellulose films (RC) were prepared from cellulose/LiOH/ureasolutions. Then, Ag particles were in-situ deposited on RC. To achieve high electricalproperties, PANI particles were further deposited on the surface of Ag/cellulose by in-situpolymerization methods using RC-Ag as template. We studied the effects of differentsynthesis conditions on the properties of PANI/Ag/cellulose composite materials. Theoptimized reaction conditions had been achieved as follow: concentration of silver nitrate was0.04mol/L, molar ratio of sodium borohydride to silver nitrate was2.0, aniline concentrationwas0.1mol/L, molar ratio of aniline to oxidant was1.0, PANI was doped by hydrochloricacid, reaction temperature was at0℃，and reaction time was7h, the electrical conductivity ofcomposites could achieve9.36×10-1S/cm. The composites had good mechanical properties(Young’s modulus was1.57GPa, and tensile strength was51.47MPa).