阅读说明：本技术 一种缓释香型装饰纸的抗菌超疏水整理方法 (Antibacterial super-hydrophobic finishing method for slow-release fragrant decorative paper ) 是由 刘丹丹 于 2019-10-30 设计创作，主要内容包括：本发明公开了一种缓释香型装饰纸的抗菌超疏水整理方法,将漂白针叶木浆与漂白阔叶木浆在水中浸泡,用打浆机疏解后,开始打浆,在浆料中加入钛白粉-高岭土复合悬浮液、湿强剂和助留剂,用标准纸页成型器抄片后,真空干燥、平衡水分得装饰原纸；将所得装饰原纸浸渍于缓释香型抗菌微胶囊溶液中,浸渍后取出,自然干燥得缓释香型抗菌整理的装饰纸；将疏水化改性的纤维素纳米颗粒、甲基三甲氧基硅烷和水放于密闭反应器中反应后,加入四氢呋喃中超声得超疏水涂料,用喷枪将其均匀喷涂在缓释香型抗菌整理的装饰纸上,在烘箱中固化,得到缓释香型抗菌超疏水装饰纸。(The invention discloses an antibacterial super-hydrophobic finishing method of slow-release fragrant decorative paper, which comprises the steps of soaking bleached softwood pulp and bleached hardwood pulp in water, pulping after defibering by a pulping machine, adding titanium dioxide-kaolin composite suspension, a wet strength agent and a retention aid into the pulp, making sheets by a standard paper sheet former, drying in vacuum and balancing moisture to obtain decorative base paper; dipping the obtained decorative base paper into a slow-release odor type antibacterial microcapsule solution, taking out after dipping, and naturally drying to obtain decorative paper for slow-release odor type antibacterial finishing; placing the hydrophobic modified cellulose nanoparticles, methyltrimethoxysilane and water in a closed reactor for reaction, adding tetrahydrofuran for ultrasonic treatment to obtain a super-hydrophobic coating, uniformly spraying the super-hydrophobic coating on the decorative paper subjected to slow-release odor type antibacterial finishing by using a spray gun, and curing in an oven to obtain the slow-release odor type antibacterial super-hydrophobic decorative paper.)

1. An antibacterial super-hydrophobic finishing method of slow-release fragrant decorative paper is characterized by comprising the following steps of:

(1) the manufacturing process of the decorative base paper comprises the following steps:

soaking 60-75 parts of bleached softwood pulp and 40-50 parts of bleached hardwood pulp in water for 3-4h, defibering the soaked pulp for 20-30min by using a beater, starting beating, adding 60-76 parts of titanium dioxide-kaolin composite suspension, 2-2.5 parts of wet strength agent and 0.06-0.08 part of retention aid into the pulp, making sheets by using a standard paper former, drying in vacuum, and balancing moisture to obtain decorative base paper;

the slow-release fragrant antibacterial finishing process of the decorative base paper comprises the following steps:

dipping the decorative base paper obtained in the step (1) in 50-60 parts of slow-release fragrance type antibacterial microcapsule solution, taking out after dipping for 1-2min, and naturally drying to obtain decorative paper for slow-release fragrance type antibacterial finishing;

the spraying process of the super-hydrophobic coating comprises the following steps:

placing 2-3 parts of hydrophobic modified cellulose nano-particles, 0.6-0.7 part of methyltrimethoxysilane and 2-3 parts of water in a closed reactor, reacting at 20-30 ℃ for 10-20min, adding 17-18 parts of tetrahydrofuran, performing ultrasonic treatment for 1-2h to obtain a super-hydrophobic coating, uniformly spraying the super-hydrophobic coating on the decorative paper obtained in the step (2) by using a spray gun, and curing in a drying oven at the temperature of 100 ℃ and 110 ℃ for 2-3h to obtain the slow-release fragrant antibacterial super-hydrophobic decorative paper.

2. The antibacterial super-hydrophobic finishing method of slow-release flavor decorative paper according to claim 1, characterized in that in step (1), the preparation of titanium dioxide-kaolin composite suspension:

dissolving 0.09-0.11 part of dispersing agent sodium hexametaphosphate in water, adding 15-19 parts of kaolin and 15-19 parts of titanium dioxide, dispersing for 25-35min, keeping the grinding concentration at 45-55%, and grinding and coating for 30-40min to obtain the titanium dioxide-kaolin composite suspension.

3. The antibacterial super-hydrophobic finishing method of slow-release aroma type decorative paper as claimed in claim 1, characterized in that in step (1), the beating degree is 30-35 ° SR, the wet strength agent is PAE, the retention aid is CPAM, and the papermaking quantitative rate is 80-90g/m ²。

4. The antibacterial super-hydrophobic finishing method of slow-release odor type decorative paper according to claim 2, characterized in that the preparation of the slow-release odor type antibacterial microcapsule solution in step (2):

dissolving 1-2 parts of chitosan in a dilute acetic acid solution with the volume fraction of 2% to obtain a chitosan acetic acid solution with the mass concentration of 2-3 g/L; dissolving 0.1-0.2 part of cross-linking agent sodium tripolyphosphate 1:5 in water, adding 3-4 parts of lemon essence, 2-4 parts of artemisia oil and 1-2 parts of emulsifier Tween 20, stirring at high speed for 20-30min in an oil bath at 40-45 ℃, then dropwise adding into chitosan acetic acid solution, and continuously stirring at constant temperature for reaction for 30-50min to obtain the slow-release fragrance type antibacterial microcapsule solution.

5. The antibacterial super-hydrophobic finishing method of the slow-release flavor type decorative paper, according to claim 2, is characterized in that in the step (3), the cellulose nano-particles are subjected to hydrophobic modification: adding water into 1:10 of 1-2 parts of cellulose nano particles to prepare a suspension, dissolving 0.8-1.9 parts of octadecylamine 1:10 in ethanol, mixing with the suspension, adjusting the pH to 7-8, stirring and reacting at 60-65 ℃ for 3-4h, and washing with ethanol for 3-5 times to obtain the hydrophobic modified cellulose nano particles.

Technical Field

The invention belongs to the field of decorative paper, and particularly relates to an antibacterial super-hydrophobic finishing method of slow-release fragrant decorative paper.

Background

In China, the production history of decorative base paper is over forty years, and the decorative base paper also belongs to a novel industry. With the increasingly diversified requirements of people on decoration styles, the performance of the decorative base paper needs to be continuously improved so as to meet the requirements of later-stage processing. However, the existing decorative base paper in the market has the defect of poor antibacterial hydrophobic property, and cannot simultaneously have the property of slow-release odor type, so that how to obtain the decorative paper with excellent antibacterial hydrophobic property of slow-release odor type is very important.

In the invention, the essence is microencapsulated by using a natural or synthetic polymer material to wrap the essence, so that not only can oxidative deterioration caused by direct light and heat influence of the essence be avoided, but also the volatilization of effective components in the essence can be avoided, the release of a fragrant substance is effectively controlled, and the stability of the fragrance is improved.

Meanwhile, the mugwort oil is a natural antibacterial substance extracted from dry leaves of mugwort of the family Compositae, has the advantages of wide antibacterial spectrum, strong antibacterial activity and the like, but has the defects of strong taste, unstable active ingredients, difficult storage and the like, and limits the application of the mugwort oil. The microcapsule technology can improve the stability of the Artemisia argyi oil and expand the application range of the Artemisia argyi oil. The microcapsule technology is utilized to coat some antibacterial agents or antibacterial substances with poor antibacterial durability and insufficient antibacterial spectrum to prepare the microcapsule antibacterial agent, the processing performance of the antibacterial agent can be improved, the application range of the antibacterial agent is expanded, and the decorative paper can be endowed with better antibacterial effect by combining the finishing technology and the microcapsule technology.

Disclosure of Invention

The invention aims to solve the existing problems and provides an antibacterial super-hydrophobic finishing method of slow-release odor type decorative paper.

The invention is realized by the following technical scheme:

an antibacterial super-hydrophobic finishing method of slow-release fragrant decorative paper comprises the following steps of:

(1) the manufacturing process of the decorative base paper comprises the following steps:

soaking 60-75 parts of bleached softwood pulp and 40-50 parts of bleached hardwood pulp in water for 3-4h, defibering the soaked pulp for 20-30min by using a beater, starting beating, adding 60-76 parts of titanium dioxide-kaolin composite suspension, 2-2.5 parts of wet strength agent and 0.06-0.08 part of retention aid into the pulp, making sheets by using a standard paper former, drying in vacuum, and balancing moisture to obtain decorative base paper;

the titanium dioxide-kaolin composite suspension is prepared by adopting a mechanochemical method, titanium dioxide coated kaolin is not simply physically adsorbed but is subjected to chemical reaction, chemical bonds Si-O-Ti and Al-O-Ti are formed between the titanium dioxide and the kaolin, the crystal structure is changed, the coating effect is good, and the requirements of decorative base paper on strength, air permeability, absorptivity, optical performance and the like can be met;

(2) the slow-release fragrant antibacterial finishing process of the decorative base paper comprises the following steps:

dipping the decorative base paper obtained in the step (1) in 50-60 parts of slow-release fragrance type antibacterial microcapsule solution, taking out after dipping for 1-2min, and naturally drying to obtain decorative paper for slow-release fragrance type antibacterial finishing;

sodium tripolyphosphate is taken as a cross-linking agent, lemon essence and artemisia oil are taken as capsule cores, chitosan is taken as a wall material, a slow-release fragrant type antibacterial microcapsule solution is prepared, and a dipping method is adopted to carry out slow-release fragrant type antibacterial finishing on decorative base paper, so that the slow-release effect is good; the decorative base paper can be endowed with good antibacterial performance, and through olfaction, the decorative paper impregnated with the slow-release odor type antibacterial microcapsule solution is strong in fragrance and long in fragrance retention time;

(3) the spraying process of the super-hydrophobic coating comprises the following steps:

placing 2-3 parts of hydrophobic modified cellulose nano-particles, 0.6-0.7 part of methyltrimethoxysilane and 2-3 parts of water in a closed reactor, reacting at 20-30 ℃ for 10-20min, adding 17-18 parts of tetrahydrofuran, performing ultrasonic treatment for 1-2h to obtain a super-hydrophobic coating, uniformly spraying the super-hydrophobic coating on the decorative paper obtained in the step (2) by using a spray gun, and curing in an oven at 110 ℃ of 100-;

the cellulose nano-particles are subjected to hydrophobic modification by using octadecylamine, the octadecylamine is successfully inoculated to the surfaces of the cellulose nano-particles through reaction, and the liquid contact angles of the modified cellulose nano-particles are increased; performing silanization modification on the hydrophobic modified cellulose nanoparticles by using methyltrimethoxysilane, performing hydrolytic condensation reaction on the methyltrimethoxysilane and hydroxyl groups of the cellulose nanoparticles to realize chemical modification, preparing a super-hydrophobic coating, spraying the super-hydrophobic coating on the decorative paper subjected to slow-release odor type antibacterial finishing, and heating and curing to obtain slow-release odor type antibacterial super-hydrophobic decorative paper;

further, the preparation of the titanium dioxide-kaolin composite suspension in the step (1): dissolving 0.09-0.11 part of dispersing agent sodium hexametaphosphate in water, adding 15-19 parts of kaolin and 15-19 parts of titanium dioxide, dispersing for 25-35min, keeping the grinding concentration at 45-55%, and grinding and coating for 30-40min to obtain the titanium dioxide-kaolin composite suspension.

Further, in the step (1), the beating degree is 30-35 DEG SR, the wet strength agent is PAE, the retention aid is CPAM, and the papermaking quantitative rate is 80-90g/m ²。

Further, the preparation of the slow-release fragrant antibacterial microcapsule solution in the step (2): dissolving 1-2 parts of chitosan in a dilute acetic acid solution with the volume fraction of 2% to obtain a chitosan acetic acid solution with the mass concentration of 2-3 g/L; dissolving 0.1-0.2 part of cross-linking agent sodium tripolyphosphate 1:5 in water, adding 3-4 parts of lemon essence, 2-4 parts of artemisia oil and 1-2 parts of emulsifier Tween 20, stirring at high speed for 20-30min in an oil bath at 40-45 ℃, then dropwise adding into chitosan acetic acid solution, and continuously stirring at constant temperature for reaction for 30-50min to obtain the slow-release fragrance type antibacterial microcapsule solution.

Further, the method for hydrophobization modification of the cellulose nanoparticles in the step (3): adding water into 1:10 of 1-2 parts of cellulose nano particles to prepare a suspension, dissolving 0.8-1.9 parts of octadecylamine 1:10 in ethanol, mixing with the suspension, adjusting the pH to 7-8, stirring and reacting at 60-65 ℃ for 3-4h, and washing with ethanol for 3-5 times to obtain the hydrophobic modified cellulose nano particles.

Compared with the prior art, the invention has the following advantages:

(1) the titanium dioxide-kaolin composite suspension is prepared by adopting a mechanochemical method, titanium dioxide coated kaolin is not simply physically adsorbed but is subjected to chemical reaction, chemical bonds Si-O-Ti and Al-O-Ti are formed between the titanium dioxide and the kaolin, the crystal structure is changed, the coating effect is good, and the requirements of decorative base paper on strength, air permeability, absorptivity, optical performance and the like can be met.

(2) Sodium tripolyphosphate is taken as a cross-linking agent, lemon essence and artemisia oil are taken as capsule cores, chitosan is taken as a wall material, a slow-release fragrant type antibacterial microcapsule solution is prepared, and a dipping method is adopted to carry out slow-release fragrant type antibacterial finishing on decorative base paper, so that the slow-release effect is good; the decorative base paper can be endowed with good antibacterial performance, and through olfaction, the decorative paper impregnated with the slow-release odor type antibacterial microcapsule solution is strong in fragrance and long in fragrance retention time.

(3) The cellulose nano-particles are subjected to hydrophobic modification by using octadecylamine, the octadecylamine is successfully inoculated to the surfaces of the cellulose nano-particles through reaction, and the liquid contact angles of the modified cellulose nano-particles are increased; and performing silanization modification on the hydrophobic modified cellulose nanoparticles by using methyltrimethoxysilane, performing hydrolytic condensation reaction on the methyltrimethoxysilane and hydroxyl groups of the cellulose nanoparticles to realize chemical modification, preparing the super-hydrophobic coating, spraying the super-hydrophobic coating on the decorative paper subjected to slow-release odor type antibacterial finishing, and heating and curing to obtain the slow-release odor type antibacterial super-hydrophobic decorative paper.

Detailed Description