阅读说明：本技术 一种高拉伸强度高密度纤维板及其绿色制备方法 (A kind of high tensile high density fiberboard and its environment-friendly preparation method thereof ) 是由 高文花 贺礼龙 王胜丹 陈克复 王斌 曾劲松 徐峻 于 2019-07-29 设计创作，主要内容包括：本发明公开了一种高拉伸强度高密度纤维板及其绿色制备方法,属于纤维板生产技术领域。该方法具体工艺步骤如下：将纳米纤维素置于冷压机中进行脱水处理得到湿坯,再将脱水后的湿坯进行热压干燥,制成高拉伸强度高密度纤维板。本发明公开的高拉伸强度高密度纤维板绿色环保、质量轻并且可降解,基于这些特性,在航空航天、建筑装饰、交通运输等应用超轻复合材料领域具有广泛的应用前景；而且其在断裂时需要消耗大的断裂功,且弹性模量高,有望作为一种新型轻质防弹材料。(The invention discloses a kind of high tensile high density fiberboard and its environment-friendly preparation method thereofs, belong to Fibreboard Production technical field.This method is carried out dehydrating to obtain wet base the specific process steps are as follows: nano-cellulose is placed in cold press, then dewatered wet base is carried out hot-pressing drying, and high tensile high density fiberboard is made.High tensile high density fiberboard disclosed by the invention is environmentally protective, light weight and degradable, is based on these characteristics, is with a wide range of applications in aerospace, building decoration, communications and transportation etc. using ultra light composite field；And it needs to consume big work to break in fracture, and elasticity modulus is high, is expected to as a kind of novel light bullet resistant material.)

1. a kind of environment-friendly preparation method thereof of high tensile high density fiberboard, which comprises the following steps:

(1) vegetable-fibre slurry is subjected to enzymolysis processing；

(2) slurry after step (1) enzymatic hydrolysis is subjected to mechanical lapping processing；

(3) step (2) mechanical lapping treated slurry is subjected to enzymolysis processing；

(4) slurry after step (3) enzymatic hydrolysis mechanical lapping is carried out to handle to obtain nano-cellulose；

(5) package of nano-cellulose filter cloth obtained by step (4) is placed in cold press and is carried out dehydrating to obtain wet base；

(6) wet base cold pressing treatment obtained by step (5) is placed, wet base is made to be formed, wet base is subjected to hot-pressing drying after molding, is made High tensile high density fiberboard.

2. a kind of environment-friendly preparation method thereof of high tensile high density fiberboard according to claim 1, feature exist In in step (1) (3), slurry concentration is 1-5 wt% when the enzymolysis processing, and pH when enzymolysis processing is 4.5-6, and temperature is 35-60 DEG C, the time is 2-5 h；The enzyme of the enzymatic hydrolysis is the enzyme that fibre structure can be made loose.

3. a kind of environment-friendly preparation method thereof of high tensile high density fiberboard according to claim 1, which is characterized in that The enzyme of the enzymatic hydrolysis is cellulose complex enzyme, mashing enzyme or restriction endonuclease.

4. a kind of environment-friendly preparation method thereof of high tensile high density fiberboard according to claim 1, feature exist In in step (2) (4), slurry concentration is 1-2 wt% when the mechanical lapping is handled.

5. a kind of environment-friendly preparation method thereof of high tensile high density fiberboard according to claim 1, feature exist In in step (2), when the mechanical lapping is handled, pressure is 0-20 MPa, is ground number 15-25 times.

6. a kind of environment-friendly preparation method thereof of high tensile high density fiberboard according to claim 1, feature exist In in step (4), when the mechanical lapping is handled, pressure is 0-40 MPa, is ground number 40-50 times.

7. a kind of environment-friendly preparation method thereof of high tensile high density fiberboard according to claim 1, feature exist In in step (5), the concentration of the nano-cellulose is 10-14 wt%, quantification of 0.39-0.65 g/cm²。

8. a kind of environment-friendly preparation method thereof of high tensile high density fiberboard according to claim 1, feature exist In in step (5), the mesh number of the filter cloth is 400-600 mesh；The pressure of the dehydration is 0-0.4 MPa.

9. a kind of environment-friendly preparation method thereof of high tensile high density fiberboard according to claim 1, feature exist In in step (6), the pressure of the sizing is 0-0.4 MPa, and the time is 3-6 h.

10. a kind of high tensile high density fiberboard as made from the described in any item preparation methods of claim 1-9.

Technical field

The present invention relates to Fibreboard Production technical field, in particular to a kind of high tensile high density fiberboard and its green Color preparation method.

Background technique

Cellulose is one of the most abundant natural polymers in nature, and nano-cellulose refers to that diameter is less than The super-micro-fine fibres of 100 nm and the minimal physical structural unit of cellulose, it is such as highly crystalline with many good characteristics Degree, high-purity, high Young's modulus, high intensity, high-hydrophilic, hyperfine structure and high transparency etc. have natural fiber in addition Plain lightweight, degradable, bio-compatible and the characteristics such as renewable, papermaking, building, automobile, food, cosmetics, electronic product, There is huge potential application foreground in the fields such as medicine.

Nano-cellulose is due to great specific surface area and surface hydroxyl abundant, from densification ability and self-bonding Ability is strong.The high tensile strength fiber plate not only environmentally protective formaldehydeless discharge, but also its physical machine prepared by nano-cellulose Tool performance is higher than some other traditional wood base composite material, and light weight is degradable, is based on these characteristics, in aerospace, builds Decoration, communications and transportation etc. is built to be with a wide range of applications using ultra light composite field；And it needs to disappear in fracture Big work to break is consumed, and elasticity modulus is high, and injury of the kinetic energy to human body of bullet can be greatly decreased, is expected to as a kind of novel Lightweight bulletproof material.

Summary of the invention

It is an object of the invention to be directed to the deficiency of existing fibrous plate performance, a kind of high density of high tensile is provided Fiberboard and its environment-friendly preparation method thereof.

The purpose of the present invention is achieved through the following technical solutions.

A kind of environment-friendly preparation method thereof of high tensile high density fiberboard, method includes the following steps:

(1) vegetable-fibre slurry is subjected to enzymolysis processing；

(2) slurry after step (1) enzymatic hydrolysis is subjected to mechanical lapping processing；

(3) step (2) mechanical lapping treated slurry is subjected to enzymolysis processing；

(4) slurry after step (3) enzymatic hydrolysis mechanical lapping is carried out to handle to obtain nano-cellulose；

(5) gained nano-cellulose filter cloth package is placed in cold press and is carried out dehydrating to obtain wet base；

(6) the wet base cold pressing treatment of gained is placed, wet base is made to be formed, wet base is subjected to hot-pressing drying after molding, high stretching is made Strength high density fiberboard.

Preferably, in step (1) (3), slurry concentration is 1-5 wt% when the enzymolysis processing, and pH when enzymolysis processing is 4.5-6, temperature are 35-60 DEG C, and the time is 2-5 h.

Preferably, in step (1) (3), the enzyme of the enzymatic hydrolysis is the enzyme that fibre structure can be made loose.

It is further preferred that the enzyme of the enzymatic hydrolysis is cellulose complex enzyme, mashing enzyme or restriction endonuclease.Most preferably inscribe Enzyme.

Preferably, in step (2) (4), slurry concentration is 1-2 wt% when the nanosizing mechanical lapping is handled.

Preferably, in step (2), when the nanosizing mechanical lapping is handled, pressure is 0-20 MPa, grinds number 15- 25 times.

Preferably, in step (4), when the nanosizing mechanical lapping is handled, pressure is 0-40 MPa, grinds number 40- 50 times.

Preferably, in step (2) (4), the equipment of the nanosizing mechanical lapping is that plant fiber can be made to be dissociated into micro-nano The equipment of rice fibril.

Preferably, in step (5), the concentration of the nano-cellulose is 10-14 wt%, quantification of 0.39-0.65 g/ cm²。

Preferably, in step (5), the mesh number of the filter cloth is 400-600 mesh；The pressure of the dehydration is 0-0.4 MPa。

Preferably, in step (6), the pressure of the sizing is 0-0.4 MPa, and the time is 3-6 h.

Preferably, the pressure of the drying is 0.05-0.1 MPa, and dry temperature is 60-70 DEG C, and the dry time is 24-36 h。

Preferably, specific step is as follows for this method:

(1) vegetable-fibre slurry is subjected to enzymolysis processing using restriction endonuclease, slurry concentration is 1-5 wt%, pH when enzymolysis processing For 4.5-6, temperature is 35-60 DEG C, and the time is 2-5 h；

(2) pulp dilution after step (1) enzymatic hydrolysis to 1-2 wt% is subjected to mechanical lapping processing, pressure is 0-20 MPa, grinding Number 15-25 times；

(3) step (2) mechanical lapping treated slurry is subjected to enzymolysis processing using restriction endonuclease, treatment conditions and step (1) It is identical；

(4) pulp dilution after step (3) enzymatic hydrolysis to 1-2 wt% is subjected to mechanical lapping processing, pressure is 0-40 MPa, grinding Number 40-50 times obtains nano-cellulose；

It (5) is 10-14 wt%, quantification of 0.39-0.65 g/cm by 257-360 g concentration²Nano-cellulose 400-600 Purpose filter cloth package is placed in cold press, is carried out dehydrating under the pressure of 0-0.4 MPa, obtains wet base after dehydration completely；

(6) wet base cold pressing treatment is placed into 3-6 h, so that it is formed at this pressure, wet base after molding is transferred in baking oven, It is 0.05-0.1 MPa in pressure, it is fine to obtain high tensile high density by temperature dry 24-36 h under conditions of being 60-70 DEG C Plate is tieed up, by the sheets thus obtained equilibrium water conten that is placed in constant-temperature constant-humidity environment with spare.

A kind of high tensile high density fiberboard as made from made as described above method, the fiberboard is by nanofiber Element is constituted, and the diameter of the nano-cellulose is 20 nm or so；The density of the fiberboard is 1.33-1.42 g/cm3.When plate When average thickness is 2.3-2.4 mm, the tensile strength of plate is 36.73-45.62 MPa, and elasticity modulus is 1.93-3.87 GPa, Work to break is 24.54-54.91 kJ/m²。

Compared with prior art, the present invention have it is following the utility model has the advantages that

(1) it is two sections of enzymatic treatments and the mechanical method combined that the present invention, which prepares nano-cellulose method, belongs to green energy conservation ring Protect preparation process.

(2) high tensile high density fiberboard disclosed by the invention is environmentally protective, light weight and degradable, is based on this A little characteristics are with a wide range of applications in aerospace, building decoration, communications and transportation etc. using ultra light composite field； And it needs to consume big work to break in fracture, and elasticity modulus is high, is expected to as a kind of novel light bullet resistant material.

Specific embodiment

Specific implementation of the invention is described in further detail below in conjunction with example, but embodiments of the present invention are not It is limited to this.

The present invention is not particularly limited the type of lignocellulosic material used, source, below with softwood pulp For.