Disclosed herein are methods of modifying properties of a cellulosic material, the method comprising: depositing an additive onto the cellulosic material, the additive being in a vapor phase and configured to modify one or more properties of the cellulosic material; and adsorbing the additive into the cellulosic material, wherein the additive reacts with one or more functional groups of the cellulosic material. The depositing can comprise an atomic layer deposition of the additive onto the cellulosic material. The additive can be configured to react with a nucleophile in the cellulosic material. The one or more properties of the cellulosic material can include: hydrophobicity, thermal conductivity, thermal diffusivity, fungo-toxicity, toxicity, wettability, tensile strength, corrosiveness, biodegradability, bio-toxicity, or swelling.

Disclosed herein are methods of modifying properties of a cellulosic material, the method comprising: depositing an additive onto the cellulosic material, the additive being in a vapor phase and configured to modify one or more properties of the cellulosic material; and adsorbing the additive into the cellulosic material, wherein the additive reacts with one or more functional groups of the cellulosic material. The depositing can comprise an atomic layer deposition of the additive onto the cellulosic material. The additive can be configured to react with a nucleophile in the cellulosic material. The one or more properties of the cellulosic material can include: hydrophobicity, thermal conductivity, thermal diffusivity, fungo-toxicity, toxicity, wettability, tensile strength, corrosiveness, biodegradability, bio-toxicity, or swelling.

A two-part flame-retardant, a flame-retardant oriented strand (OSB) and method for forming a flame-retardant OSB is provided. The two-part flame-retardant composition includes an aqueous solution containing a water-soluble flame-retardant and a flame-retardant powder that is incorporated into an oriented strand board without substantially affecting the mechanical properties of the oriented strand board. The method includes applying the aqueous solution containing a water-soluble flame-retardant to an oriented strand board furnish and applying a flame-retardant powder to the wetted furnish, without requiring an additional drying step.

A treatment process and wood products thereof including a product formulation of a single phase solution combining a wood preservative (durable component) with a Flame Retardant component (FR) to produce a durable Flame Retardant (dFR) treated wood product. The durable component comprises a range of copper based and non-copper based wood preservatives, while the FR component comprises alkali metal silicates and alkali metal aluminate compounds. The dFR working solution undergoes chemical impregnation (treatment) followed by a heat (fixation) process step that locks the chemical into the wood making it non-leachable. The dFR treated wood products are tested for their enhanced fire performance properties. When heated, wood undergoes thermal degradation and combustion producing gases, vapors, tars and chars. Using a cone calorimeter burn test method, dFR treated wood products show a significant reduction in heat release rate, mass loss rate and smoke generated values compared to untreated radiate pine.

A treatment process and wood products thereof including a product formulation of a single phase solution combining a wood preservative (durable component) with a Flame Retardant component (FR) to produce a durable Flame Retardant (dFR) treated wood product. The durable component comprises a range of copper based and non-copper based wood preservatives, while the FR component comprises alkali metal silicates and alkali metal aluminate compounds. The dFR working solution undergoes chemical impregnation (treatment) followed by a heat (fixation) process step that locks the chemical into the wood making it non-leachable. The dFR treated wood products are tested for their enhanced fire performance properties. When heated, wood undergoes thermal degradation and combustion producing gases, vapors, tars and chars. Using a cone calorimeter burn test method, dFR treated wood products show a significant reduction in heat release rate, mass loss rate and smoke generated values compared to untreated radiate pine.

A two-part flame-retardant, a flame-retardant oriented strand (OSB) and method for forming a flame-retardant OSB is provided. The two-part flame-retardant composition includes an aqueous solution containing a water-soluble flame-retardant and a flame-retardant powder that is incorporated into an oriented strand board without substantially affecting the mechanical properties of the oriented strand board. The method includes applying the aqueous solution containing a water-soluble flame-retardant to an oriented strand board furnish and applying a flame-retardant powder to the wetted furnish, without requiring an additional drying step.

The present invention discloses an assembled bamboo sleeper, which is obtained by using a bamboo unit as a raw material, dried and modified at the temperature of 110-180° C., undergone coating treatment using a dopamine solution, adhesive dipping, curing and solidifying, assembling and gluing, further solidifying, further treatment using a dopamine solution, and anti-mildew and/or anti-corrosion and/or anti-insect treatment, and then fastened. The present invention further provides a preparation method for the foregoing bamboo sleeper. The bamboo sleeper prepared in the present invention is green and environmentally friendly, and applicable for ballasted tracks of railways and urban rail transit systems.

The present invention discloses an assembled bamboo sleeper, which is obtained by using a bamboo unit as a raw material, dried and modified at the temperature of 110-180° C., undergone coating treatment using a dopamine solution, adhesive dipping, curing and solidifying, assembling and gluing, further solidifying, further treatment using a dopamine solution, and anti-mildew and/or anti-corrosion and/or anti-insect treatment, and then fastened. The present invention further provides a preparation method for the foregoing bamboo sleeper. The bamboo sleeper prepared in the present invention is green and environmentally friendly, and applicable for ballasted tracks of railways and urban rail transit systems.

The invention relates to a method for the treatment of cellulosic material. The method is comprising the steps of impregnation of the cellulosic material and treatment of the impregnated cellulosic material by a fumigation step or an evaporation step. Impregnation is performed with a metal ion M and at least one ion precursor Z yielding an impregnated cellulosic material. The at least one ion precursor Z provides an anion A or an anion A and a cation Y comprised within at least one metal salt solution I or with a metal salt solution II comprising a metal ion M. The fumigation or evaporation step is yielding a cellulosic composite material comprising a compound M(NH4)A, MYA or M(OH)x, wherein M is a metal.

The invention relates to a method for the treatment of cellulosic material. The method is comprising the steps of impregnation of the cellulosic material and treatment of the impregnated cellulosic material by a fumigation step or an evaporation step. Impregnation is performed with a metal ion M and at least one ion precursor Z yielding an impregnated cellulosic material. The at least one ion precursor Z provides an anion A or an anion A and a cation Y comprised within at least one metal salt solution I or with a metal salt solution II comprising a metal ion M. The fumigation or evaporation step is yielding a cellulosic composite material comprising a compound M(NH4)A, MYA or M(OH)x, wherein M is a metal.