公开(公告)号：US20230043739A1

公开(公告)日：2023-02-09

申请号：US17883282

申请日：2022-08-08

申请人： CHANGZHOU INSTITUTE OF TECHNOLOGY

发明人： Li ZHAO ,  Chenyi LIU ,  Jie LI ,  Xiaoyun CAO ,  Xinping GUO ,  Rui ZHU

IPC分类号： C04B26/32 ,  C04B16/02 ,  C04B16/12 ,  C04B20/00 ,  C04B20/10

摘要： A method for preparing a silane coupling agent/silica/plant fiber composite includes the following steps: S1: pretreating plant fiber; S2: preparing hydrolysate of a silane coupling agent; S3: preparing a silane coupling agent/plant fiber composite; S4: preparing a silica nanoparticle dispersion; and S5: preparing a silane coupling agent/silica nanoparticle/plant fiber composite. Through the covalent interaction among a silanol group (Si—OH) formed by hydrolysis of the silane coupling agent, Si—OH of the silica, and a hydroxyl group (—OH) on the surface of the plant fiber, the present invention enables silica nanoparticles to be grafted on the surface of the plant fiber. Using a hydrophobic film formed by the silane coupling agent, harmful ions are prevented from invading, and the volume stability of the fiber is improved. Using the pozzolanic activity of the silica nanoparticles, the alkalinity and calcium hydroxide content around the fiber are reduced.