【摘要】 基于仿生物矿化原理，以苯丙氨酸衍生物作为模板剂和诱导剂，将其接枝到杉木细胞壁上，结合溶胶-凝胶法，诱导多羟基SiO₂在杉木细胞壁上有序沉积，并调控其结晶形态，实现对杉木力学性能的协同增效作用。结果表明：苯丙氨酸衍生物诱导SiO₂矿化杉木的方式分为化学结合（细胞壁）和物理沉积（细胞腔）两种方式，其中，化学结合是通过苯丙氨酸衍生物与杉木形成的富含矿化位点的有机膜，诱导SiO₂的成核结晶与有序沉积，生成了棒状SiO₂,这种形态的SiO₂有效地支撑了木材结构，分散了外力；矿化后木材的顺纹抗压强度、抗弯强度、弹性模量、抗压强重比和抗弯强重比分别为49.76 MPa、65.14 MPa、8 010.83 MPa、1 777.14 N·m/kg、2 326.43 N·m/kg,较空白组杉木分别提升了54.29%、27.20%、20.16%、32.26%和9.03%。更多还原

【Abstract】 Based on the principle of biomineralization, the phenylalanine derivatives serve as a template and inducer and graft it onto Chinese fir cell wall, combined with sol-gel method, inducing the ordered deposition and regulating crystalline morphology of polyhydroxy-SiO₂, thereby achieving synergetic effect of enhancing the wood mechanical performance. In result, the way of inducing SiO₂ mineralization of Chinese fir by phenylalanine derivatives can be divided into chemical combination（cell wall） and physical deposition（cell lumen）, among them, chemical combination is that the organic film of rich in mineralization site formed through the combination of phenylalanine derivatives and Chinese fir, which can induce the nucleation, crystallization, and ordered deposition, eventually generated rod-shaped SiO₂. Rod-shaped SiO₂ supports effectively wood structure and diffuse the external force.The longitudinal compressive strength, bending strength, elastic modulus, compressive weight ratio and bending strength to weight ratio are 49.76 MPa, 65.14 MPa, 8 010.83 MPa, 1 777.14 N·m/kg, and 2 326.43 N·m/kg, respectively. Compared with the blank group, the values of fir increased by 54.29%, 27.20%, 20.16%, 32.26% and 9.03%, respectively.更多还原