【摘要】 纳米纤维素是一种新型高分子功能材料,具有独特的结构和优异的性能。本文采用加热析出法制备得到纳米纤维素(HNC)的直径为10-100 nm,XRD、FTIR、TG等测试结果表明HNC在制备过程中,纤维素晶体由I型转化为II型,但分子结构未发生变化。通过对纳米纤维素分散液进行压滤制备得到纳米纤维素膜(HNCF),其透光率为89.7%,抗拉强度为84.9 MPa,杨氏模量为4933.6 MPa。并进一步揭示了加热析出法制备纳米纤维素的机理。更多还原

【Abstract】 Nanocellulose(HNC) is a novel functional polymer material with unique structure and excellent performance. HNC with a width between 10-100 nm was prepared by heating cellulose solution directly. The structure of HNC did not change during the preparation process,but the crystal form transferred from Cellulose I to Cellulose II,which was validated by the results of XRD,FTIR,and thermal performance test. The nanocellulose film(HNCF) obtained by filtering the nanocellulose solution,which showed a transmittance of 89. 7%,tensile strength of 84. 9 MPa and Young’s modulus of 4933. 6 MPa,respectively. The convincing mechanism model explaining the function of sodium hydroxide and urea was revealed.更多还原