Environment-friendly fiber-reinforced calcium silicate board and production method thereof: Fid-Bau Portal

Environment-friendly fiber-reinforced calcium silicate board and production method thereof

ZHENG QIANG

The invention relates to the technical field of calcium silicate boards, and discloses an environment-friendly fiber-reinforced calcium silicate board and a production method thereof.The production method comprises the steps that lignin is removed from wood flour through sodium chlorite, hemicellulose is removed from wood flour through potassium hydroxide, cellulose fibers are separated from wood flour through hydrochloric acid, and finally cellulose nanofibers are obtained through grinding; the preparation method comprises the following steps: by taking cellulose nanofibers as a growth carrier, generating a nano calcium silicate coating layer on the surfaces of the nanofibers through an in-situ hydrothermal method to obtain cellulose nanofiber-loaded nano calcium silicate, and carrying out mixed pulping and autoclaved curing on the cellulose nanofiber-loaded nano calcium silicate, diatomite, quartz sand, quick lime and cement to obtain the fiber-reinforced calcium silicate board. Cellulose nanofiber loaded nano calcium silicate is used as reinforcing fiber, and the obtained environment-friendly calcium silicate board has higher comprehensive performance such as breaking strength and impact strength.

本发明涉及硅酸钙板技术领域，且公开了一种环保型纤维增强硅酸钙板及其生产方法，将木粉依次通过亚氯酸钠去除木质素、氢氧化钾去除半纤维素、盐酸分离纤维素纤维，最后研磨得到纤维素纳米纤维；然后以纤维素纳米纤维作为生长载体，通过原位水热法，在纳米纤维表面生成了纳米硅酸钙包覆层，得到了纤维素纳米纤维负载纳米硅酸钙，再与硅藻土、石英砂、生石灰、水泥经过混合打浆、蒸压养护得到纤维增强硅酸钙板；以纤维素纳米纤维负载纳米硅酸钙作为增强纤维，得到的环保型硅酸钙板具有更高的抗折强度和抗冲击强度等综合性能。

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