阅读说明：本技术 一种竹木纤维板用防水无菌布艺环保膜及其制备工艺 (Waterproof sterile cloth environment-friendly film for bamboo-wood fiberboard and preparation process thereof ) 是由 刘涛 刘杰 田永 于 2020-07-16 设计创作，主要内容包括：本发明公开了一种竹木纤维板用防水无菌布艺环保膜,涉及环保膜制备技术领域,主要为了解决现有环保膜力学性能差的问题；包括以下原料：聚羟基丁酸酯、聚己内酯、超高分子量聚乙烯粉末、纳米无机物、海藻酸钠、改性壳聚糖、改性添加剂、环氧聚合液、半乳甘露聚糖、螺旋藻多糖、紫草多糖、醋酸纤维素、增塑剂、氧化淀粉、辐照液,本发明所制得的环保膜可降解、易降解,绿色环保,通过加入超高分子量聚乙烯粉末,极大地提高了膜的抗拉、抗切割等力学性能,通过螺旋藻多糖和紫草多糖,提高了膜的抑菌抗菌性能,具有十分广阔的市场前景。(The invention discloses a waterproof sterile cloth environment-friendly film for bamboo and wood fiber boards, relates to the technical field of environment-friendly film preparation, and mainly aims to solve the problem that the existing environment-friendly film is poor in mechanical property; the method comprises the following raw materials: the environment-friendly film prepared by the method is degradable, easy to degrade and environment-friendly, and the mechanical properties of the film, such as tensile strength, cutting resistance and the like, are greatly improved by adding the ultra-high molecular weight polyethylene powder, and the antibacterial performance of the film is improved by the spirulina polysaccharide and the lithospermum polysaccharide, so that the environment-friendly film has a very wide market prospect.)

1. The waterproof sterile cloth art environment-friendly film for the bamboo-wood fiberboard is characterized by comprising the following raw materials by weight: 60-80 parts of polyhydroxybutyrate, 50-70 parts of polycaprolactone, 65-75 parts of ultra-high molecular weight polyethylene powder, 20-40 parts of nano inorganic matter, 80-100 parts of sodium alginate, 40-60 parts of modified chitosan, 10-20 parts of modified additive, 30-50 parts of epoxy polymer liquid, 10-30 parts of galactomannan, 15-25 parts of spirulina polysaccharide, 10-20 parts of lithospermum polysaccharide, 30-40 parts of cellulose acetate, 10-20 parts of plasticizer, 20-30 parts of oxidized starch and 100 parts of irradiation liquid.

2. The waterproof sterile cloth environment-friendly film for the bamboo-wood fiberboard of claim 1, which is characterized by comprising the following raw materials by weight: 65-75 parts of polyhydroxybutyrate, 55-65 parts of polycaprolactone, 68-72 parts of ultra-high molecular weight polyethylene powder, 25-35 parts of nano inorganic matter, 85-95 parts of sodium alginate, 45-55 parts of modified chitosan, 11-18 parts of modified additive, 35-45 parts of epoxy polymer liquid, 15-25 parts of galactomannan, 17-23 parts of spirulina polysaccharide, 13-17 parts of lithospermum polysaccharide, 33-37 parts of cellulose acetate, 12-18 parts of plasticizer, 23-27 parts of oxidized starch and 110-130 parts of irradiation liquid.

3. The waterproof sterile cloth environment-friendly film for the bamboo-wood fiberboard of claim 2, which is characterized by comprising the following raw materials by weight: 70 parts of polyhydroxybutyrate, 60 parts of polycaprolactone, 60 parts of ultra-high molecular weight polyethylene powder, 30 parts of nano inorganic matters, 90 parts of sodium alginate, 50 parts of modified chitosan, 15 parts of modified additives, 40 parts of epoxy polymerization liquid, 20 parts of galactomannan, 20 parts of spirulina polysaccharide, 15 parts of lithospermum polysaccharide, 35 parts of cellulose acetate, 15 parts of plasticizer, 25 parts of oxidized starch and 120 parts of irradiation liquid.

4. The waterproof sterile cloth environmental protection film for the bamboo-wood fiberboard of claim 1, wherein the nano inorganic substance is one of nano lamellar clay, nano hydroxyapatite and nano montmorillonite.

5. The waterproof sterile cloth environment-friendly film for the bamboo-wood fiberboard of claim 1, wherein the modified chitosan is prepared by reacting alkyl quaternary ammonium salt with chitosan, and the alkyl quaternary ammonium salt is one of 2, 3-epoxypropyltrimethyl ammonium chloride, 2, 3-epoxypropyldimethyl decyl ammonium chloride and 2, 3-epoxypropyldimethyl dodecyl ammonium chloride.

6. The waterproof sterile cloth environment-friendly film for the bamboo-wood fiberboard of claim 1, wherein the modified additive is chlorinated polyethylene.

7. The waterproof sterile cloth environment-friendly film for the bamboo-wood fiberboard of claim 1, wherein the epoxy polymerization solution is prepared by mixing epoxy polysiloxane and n-butanol according to a mass ratio of 1: 5.

8. The waterproof sterile cloth environment-friendly film for the bamboo-wood fiberboard of claim 1, wherein the plasticizer is acetyl tributyl citrate.

9. The waterproof sterile cloth environment-friendly film for the bamboo-wood fiberboard of claim 1, wherein the irradiation solution is an aqueous solution of 7-10 wt% of a high-purity olefin halamine monomer containing a quaternary ammonium group.

10. The preparation process of the waterproof sterile cloth environment-friendly film for the bamboo-wood fiberboard of any one of claims 1 to 9, which is characterized by comprising the following steps:

1) dissolving ultrahigh molecular weight polyethylene powder into a decalin dilute solution with the concentration of 8-12 wt%, and continuously stirring until the ultrahigh molecular weight polyethylene powder is completely dissolved;

2) adding sodium alginate, epoxy polymerization solution, galactomannan, spirulina polysaccharide and lithospermum polysaccharide into the solution obtained in the step 1), then sequentially adding modified chitosan, modified additive and cellulose acetate, finally adding oxidized starch, and fully and uniformly stirring to obtain a mixture A;

3) fully mixing polyhydroxybutyrate, polycaprolactone and a nano inorganic substance, then adding a plasticizer, and uniformly stirring to obtain a mixture B;

4) and stirring and mixing the mixture A and the mixture B, uniformly coating the mixture B on release paper after fully mixing, drying to form a preformed film, then putting the preformed film into an irradiation liquid for soaking for 30-40min, performing electron beam irradiation after soaking is completed, and then drying to finally obtain the required waterproof sterile cloth environment-friendly film for the bamboo-wood fiber board.

Technical Field

The invention relates to the technical field of preparation of environment-friendly films, in particular to a waterproof sterile cloth environment-friendly film for bamboo and wood fiber boards and a preparation process thereof.

Background

The fiberboard is also named as a density board, which is an artificial board made of wood fiber or other plant cellulose fiber as a raw material and urea formaldehyde resin or other suitable adhesives. During the manufacturing process, adhesives and/or additives may be applied. The fiber board has the advantages of uniform material, small longitudinal and transverse strength difference, difficult cracking and the like, and has wide application. The 1 cubic meter fiberboard needs 2.5 to 3 cubic meters of wood to manufacture, and can replace 3 cubic meters of sawn timber or 5 cubic meters of log. The development of fiberboard production is an effective way for the comprehensive utilization of wood resources.

The environment-friendly film is required to be used in the production of the fiberboard, the cost of the raw materials of the existing environment-friendly film is high, and the processed environment-friendly film has poor mechanical property and is easy to damage in the using process.

Disclosure of Invention

The embodiment of the invention aims to provide a waterproof sterile cloth environment-friendly film for bamboo-wood fiber boards and a preparation process thereof, so as to solve the problems.

In order to achieve the purpose, the invention provides the following technical scheme:

the waterproof sterile cloth environment-friendly film for the bamboo-wood fiberboard comprises the following raw materials in parts by weight: 60-80 parts of polyhydroxybutyrate, 50-70 parts of polycaprolactone, 65-75 parts of ultra-high molecular weight polyethylene powder, 20-40 parts of nano inorganic matter, 80-100 parts of sodium alginate, 40-60 parts of modified chitosan, 10-20 parts of modified additive, 30-50 parts of epoxy polymer liquid, 10-30 parts of galactomannan, 15-25 parts of spirulina polysaccharide, 10-20 parts of lithospermum polysaccharide, 30-40 parts of cellulose acetate, 10-20 parts of plasticizer, 20-30 parts of oxidized starch and 100 parts of irradiation liquid.

In one alternative: the composite material comprises the following raw materials by weight: 65-75 parts of polyhydroxybutyrate, 55-65 parts of polycaprolactone, 68-72 parts of ultra-high molecular weight polyethylene powder, 25-35 parts of nano inorganic matter, 85-95 parts of sodium alginate, 45-55 parts of modified chitosan, 11-18 parts of modified additive, 35-45 parts of epoxy polymer liquid, 15-25 parts of galactomannan, 17-23 parts of spirulina polysaccharide, 13-17 parts of lithospermum polysaccharide, 33-37 parts of cellulose acetate, 12-18 parts of plasticizer, 23-27 parts of oxidized starch and 110-130 parts of irradiation liquid.

In one alternative: the composite material comprises the following raw materials by weight: 70 parts of polyhydroxybutyrate, 60 parts of polycaprolactone, 60 parts of ultra-high molecular weight polyethylene powder, 30 parts of nano inorganic matters, 90 parts of sodium alginate, 50 parts of modified chitosan, 15 parts of modified additives, 40 parts of epoxy polymerization liquid, 20 parts of galactomannan, 20 parts of spirulina polysaccharide, 15 parts of lithospermum polysaccharide, 35 parts of cellulose acetate, 15 parts of plasticizer, 25 parts of oxidized starch and 120 parts of irradiation liquid.

In one alternative: the nano inorganic matter is one of nano lamellar clay, nano hydroxyapatite and nano montmorillonite.

In one alternative: the modified chitosan is prepared by reacting alkyl quaternary ammonium salt with chitosan, wherein the alkyl quaternary ammonium salt is one of 2, 3-epoxypropyl trimethyl ammonium chloride, 2, 3-epoxypropyl dimethyl decyl ammonium chloride and 2, 3-epoxypropyl dimethyl dodecyl ammonium chloride.

In one alternative: the modified additive is chlorinated polyethylene.

In one alternative: the epoxy polymerization liquid is prepared by mixing epoxy polysiloxane and n-butyl alcohol according to the mass ratio of 1: 5.

In one alternative: the plasticizer is acetyl tributyl citrate.

In one alternative: the irradiation liquid is 7-10 wt% of aqueous solution of olefin haloamine monomer containing high-purity quaternary ammonium group.

A preparation process of a waterproof sterile cloth environment-friendly film for bamboo-wood fiber boards comprises the following steps:

1) dissolving ultrahigh molecular weight polyethylene powder into a decalin dilute solution with the concentration of 8-12 wt%, and continuously stirring until the ultrahigh molecular weight polyethylene powder is completely dissolved;

2) adding sodium alginate, epoxy polymerization solution, galactomannan, spirulina polysaccharide and lithospermum polysaccharide into the solution obtained in the step 1), then sequentially adding modified chitosan, modified additive and cellulose acetate, finally adding oxidized starch, and fully and uniformly stirring to obtain a mixture A;

3) fully mixing polyhydroxybutyrate, polycaprolactone and a nano inorganic substance, then adding a plasticizer, and uniformly stirring to obtain a mixture B;

4) and stirring and mixing the mixture A and the mixture B, uniformly coating the mixture B on release paper after fully mixing, drying to form a preformed film, then putting the preformed film into an irradiation liquid for soaking for 30-40min, performing electron beam irradiation after soaking is completed, and then drying to finally obtain the required waterproof sterile cloth environment-friendly film for the bamboo-wood fiber board.

Compared with the prior art, the embodiment of the invention has the following beneficial effects:

the environment-friendly membrane prepared by the invention is degradable, easy to degrade and environment-friendly, the mechanical properties of the membrane such as tensile strength, cutting resistance and the like are greatly improved by adding the ultra-high molecular weight polyethylene powder, the antibacterial property of the membrane is improved by using the spirulina polysaccharide and the lithospermum polysaccharide, and the membrane has a very wide market prospect.

Detailed Description

The present invention is described in detail in the following examples, which are given for the purpose of illustration only and are not intended to limit the scope of the invention. Any obvious modifications or variations can be made to the present invention without departing from the spirit or scope of the present invention.