Coupling modified nanocrystal fiber-added fast-growing wood composite modifying agent for improving thermal stability of wood

Abstract

The invention discloses a coupling modified nanocrystal fiber-added fast-growing wood composite modifying agent for improving thermal stability of wood. The fast-growing wood composite modifying agent is prepared from the following raw materials in parts by weight: 3 to 3.5 parts of formaldehyde, 2 to 3 parts of urea, 1.5 to 2 parts of hexamethylene tetramine, 0.02 to 0.03 part of maleic anhydride, a proper amount of acetic acid, a proper amount of ammonium hydroxide, a proper amount of deionized water, 20 to 23 parts of DMDHEU of which the solid content is 42wt%, 1.5 to 2 parts of magnesium chloride hexahydrate, 10 to 11 parts of silica sol, 2 to 3 parts of nanocrystal cellulose, 0.8 to 1 part of nano titanium dioxide, a proper amount of absolute ethyl alcohol, 0.2 to 0.3 part of a silane coupling agent KH550, and a proper amount of 12 mol / L concentrated hydrochloric acid. According to the fast-growing wood composite modifying agent, a product is good in permeability, high in loss resistance and good in heat-resistant stability, the fast-growing wood composite modifying agent has a good modification effect on the fast-growing wood, the modified fast-growing wood has good compressive strength, the water absorption performance is reduced, and the modified fast-growing wood can be manufactured into furniture like outdoor tables and chairs.

Description

technical field [0001] The invention relates to the technical field of wood modification, in particular to a fast-growing wood composite modifier for improving the thermal stability of wood by coupling modified nano crystal fibers. Background technique [0002] As an important means of production in social and economic construction, wood and wooden materials are not only widely used in various fields in daily life, but also widely used in industrial fields such as transportation, construction and aerospace. With the increasing shortage of forest resources worldwide, especially the sharp decline in the number of precious wood, a large number of fast-growing tree species have been widely planted to meet the global wood supply in recent years. Compared with natural forest trees, fast-growing tree species are limited by factors such as short growth years, resulting in great differences between early and late wood, loose materials, and poor mechanical properties. Therefore, it is...

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Problems solved by technology

Although the mechanical properties of the modified fast-growing wood have been improved, the application of the fast-growing wood in the field of outdoor furniture and outdoor wood equipment has been affected due to its insufficient water absorption. It also hopes to have other additional properties to meet the demand for fast-growing wood such as outdoor furniture