A method for preparing a treated cellulosic material comprising: providing a cellulosic material; a first treatment protocol comprising impregnating the cellulosic material with an aqueous solution comprising a polymer, the polymer comprising a water-soluble polyetheramine; and a second treatment protocol comprising impregnating the cellulosic material with a modifying agent, the modifying agent comprising an aqueous dispersion comprising an epoxy-containing resin.

A hydrophobic fluid includes a solvent-based solution of at least one aliphatic and/or aromatic hydrocarbon, with a chain length of C9 to C15 and at least one ether, ester, ketone and/or an alcohol, in particular a non-flammable alcohol. The hydrophobic fluid also has a fluoropolymer, in particular a non-combustible fluoropolymer with a flash point>60° C. in a proportion of 0.1 to 30 wt. %.

Disclosed is a method of purification of utilized acetylation fluid recovered from a process of acetylating wood. The method involves subjecting the recovered acetylation fluid to cooling crystallization. By this method terpene and terpenoid impurities are removed, as well as other impurities. Disclosed is also a method of acetylating wood resulting in acetylated wood and utilized acetylation fluid comprising acetic acid, and purifying the utilized acetylation fluid by cooling crystallization.

Disclosed is a board made from acetylated mbberwood elements and a method for making same. The acetylated rubberwood elements have an acetyl content of at least 17% and/or are prepared by acetylating mbberwood elements using an acetylation agent in the vapour phase. The invention also pertains to acetylated rubberwood elements prepared by using an acetylation agent in the vapour phase.

An object of the present invention is to provide a flame-retardant woody material having low hygroscopicity and excellent flame-retardant performance, and a flame retardant for woody materials therefor. The present invention relates to a flame retardant for woody materials comprising an organic phosphorus compound represented by the following formula (1) and a nitrogen compound represented by the following formula (2); and also relates to a flame-retardant woody material comprising a woody material fireproofed with the flame retardant for woody materials: ##STR00001## wherein in the formula (1), R.sub.1 and R.sub.2 are the same or different, and each represents a hydrogen atom, hydroxy, or the like; n is an integer of 1 to 4; X.sub.1 and X.sub.2 are the same or different, and each represents a hydrogen atom, hydroxy, or the like; and ##STR00002## wherein in the formula (2), R.sub.3, R.sub.4, R.sub.5, R.sub.6, and R.sub.7 are the same or different, and each represents a hydrogen atom, methyl, or the like.

The present invention relates to a method for preparing a wood modifier and a method for wood modification, and in particular, to a method for preparing a room temperature cured multifunctional wood modifier and a method for wood modification to solve the problems of high construction temperature, high toxicity, poor leaching-resistance and single function of existing wood modifiers. The method includes: step 1: weighing a hydrophobic polymer resin, an additive, a curing agent and a solvent, mixing and then stirring at room temperature to obtain a functional reagent A; step 2: weighing nanoparticles, a surface modifier and toluene, mixing and then stirring, cleaning with acetone, centrifuging, and drying to obtain a functional reagent B; step 3: adding a functional reagent C into the functional reagent A, evenly stirring, adding the functional reagent B, and performing ultrasonic processing to obtain the multifunctional wood modifier.

A super strong and tough densified wood structure is formed by subjecting a cellulose-based natural wood material to a chemical treatment that partially removes lignin therefrom. The treated wood retains lumina of the natural wood, with cellulose nanofibers of cell walls being aligned. The treated wood is then pressed in a direction crossing the direction in which the lumina extend, such that the lumina collapse and any residual fluid within the wood is removed. As a result, the cell walls become entangled and hydrogen bonds are formed between adjacent cellulose nanofibers, thereby improving the strength and toughness of the wood among other mechanical properties. By further modifying, manipulating, or machining the densified wood, it can be adapted to various applications.

Disclosed is a method for preparing a hydrophilic writing sliced bamboo veneer, including, in sequence, the following steps: (1) processing a sliced bamboo veneer into thin bamboo sheets with a thickness of 0.2-0.6 mm; (2) selecting the thin bamboo sheets with less color difference and fewer processing defects, and rolling the selected thin bamboo sheets on a plane; (3) performing deburring, sanding, and surface polishing on the rolled thin bamboo sheets; (4) performing mildewproofing and mothproofing treatment on the thin bamboo sheets; (5) performing surface coating treatment on the thin bamboo sheets using a coating material; (6) drying the coated thin bamboo sheets at low temperature; (7) fine-polishing the dried thin bamboo sheets; (8) cutting the thin bamboo sheets; and (9) flattening, compacting, and piling the cut thin bamboo sheets for future use.

A process utilizes electron beam generated ionizing radiation or low energy electron irradiation to effect cure of polymerizable stain compositions applied to wood planking. The electron beam ionization process generates sufficient energy to break bonds and generate new cross-links within the polymeric stain composition thus bonding the stain strongly within the pores and surface of the wood planks further creating a durable treatment. The electron beam ionization process simplifies the curing process by eliminating or reducing the need for expensive photoinitiators. Pre-stained wood planking is suitable for exterior decking materials and building panels requiring a combination of color affected and durable finishes, thereby eliminating the need for field installation of pretreatments, stains, coatings and the like. These electron beam cured wood planks take on an assortment of appearances including clear, natural, translucent, and solid hues.

The present disclosure describes a treated cellulosic material comprising a cellulosic material having a porous structure defining a plurality of pores, at least a portion of the pores containing a treating agent comprising a polymer, the polymer comprising a polyurethane polymer. The present disclosure further describes a method for preparing a treated cellulosic material comprising providing a cellulosic material; and a first treatment protocol comprising impregnating the cellulosic material with an aqueous dispersion comprising a polymer, the polymer comprising a polyurethane polymer; and a second treatment protocol comprising impregnating the cellulosic material with a modifying agent, the modifying agent comprising a hydrophobic amine.