WO2020082288A1 - 光触媒纳米TiO 2水溶胶固结于织物的方法和光触媒织物 - Google Patents

光触媒纳米TiO 2水溶胶固结于织物的方法和光触媒织物 Download PDF

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WO2020082288A1
WO2020082288A1 PCT/CN2018/111836 CN2018111836W WO2020082288A1 WO 2020082288 A1 WO2020082288 A1 WO 2020082288A1 CN 2018111836 W CN2018111836 W CN 2018111836W WO 2020082288 A1 WO2020082288 A1 WO 2020082288A1
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fabric
photocatalyst
tio
hydrosol
nano
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PCT/CN2018/111836
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English (en)
French (fr)
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滕召部
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江苏腾盛纺织科技集团有限公司
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Priority to PCT/CN2018/111836 priority Critical patent/WO2020082288A1/zh
Publication of WO2020082288A1 publication Critical patent/WO2020082288A1/zh

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    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06B—TREATING TEXTILE MATERIALS USING LIQUIDS, GASES OR VAPOURS
    • D06B15/00—Removing liquids, gases or vapours from textile materials in association with treatment of the materials by liquids, gases or vapours
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06B—TREATING TEXTILE MATERIALS USING LIQUIDS, GASES OR VAPOURS
    • D06B21/00—Successive treatments of textile materials by liquids, gases or vapours
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06B—TREATING TEXTILE MATERIALS USING LIQUIDS, GASES OR VAPOURS
    • D06B3/00—Passing of textile materials through liquids, gases or vapours to effect treatment, e.g. washing, dyeing, bleaching, sizing, impregnating
    • D06B3/10—Passing of textile materials through liquids, gases or vapours to effect treatment, e.g. washing, dyeing, bleaching, sizing, impregnating of fabrics
    • D06B3/18—Passing of textile materials through liquids, gases or vapours to effect treatment, e.g. washing, dyeing, bleaching, sizing, impregnating of fabrics combined with squeezing, e.g. in padding machines
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M11/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising
    • D06M11/32—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with oxygen, ozone, ozonides, oxides, hydroxides or percompounds; Salts derived from anions with an amphoteric element-oxygen bond
    • D06M11/36—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with oxygen, ozone, ozonides, oxides, hydroxides or percompounds; Salts derived from anions with an amphoteric element-oxygen bond with oxides, hydroxides or mixed oxides; with salts derived from anions with an amphoteric element-oxygen bond
    • D06M11/46—Oxides or hydroxides of elements of Groups 4 or 14 of the Periodic Table; Titanates; Zirconates; Stannates; Plumbates
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M23/00—Treatment of fibres, threads, yarns, fabrics or fibrous goods made from such materials, characterised by the process

Definitions

  • the invention relates to the field of photocatalytic materials, in particular to a method for photocatalyst nano-TiO 2 hydrosol to be consolidated in a fabric and a photocatalyst fabric.
  • Medium is a photocatalytic nanoscale TiO 2 is a general term photo-semiconductor material having a photocatalytic function representative, is an ideal material indoor environmental pollution control current international, under the action of light, have a strong catalytic degradation function, can Effectively degrades toxic and harmful gases such as formaldehyde in the air, can effectively kill a variety of bacteria, antibacterial rate is as high as 99.99%, and can decompose and harmless toxins released by bacteria or fungi, and also has deodorization, anti-bacterial Dirt and other functions.
  • the photocatalyst will produce a photocatalytic reaction similar to photosynthesis under the irradiation of light, producing free hydroxyl and active oxygen with extremely strong oxidizing ability, and has a strong photo-reduction function, so the unit volume of the photocatalyst The larger the surface area, the stronger the photocatalytic reaction and the more free hydroxyl and active oxygen produced. It can be said that the particle size is the key indicator of the quality of the photocatalyst. This requires the photocatalyst to be prepared and subsequently stored and used In the process, it is necessary not only that the particle size of TiO 2 should be sufficiently small, but also that TiO 2 must not agglomerate and affect the photoreaction area.
  • the solid content of the nano-scale TiO 2 in the hydrosol fixed on the surface of the fabric directly affects the final catalytic performance of the photocatalyst fabric product. Therefore, it is very important to ensure the stability and solid content of the hydrosol during the sizing process.
  • the technical problem to be solved by the present invention is to provide a method for the photocatalyst nano-TiO 2 hydrosol to be consolidated on the fabric, which can ensure that the solid content rate of the nano-scale TiO 2 on the surface of the fabric is more than 80%, with high stability and strong photocatalytic performance.
  • the fabric is transported to the padding tank equipped with the photocatalyst nano-TiO 2 hydrosol through the conveying roller, and passes through the photocatalyst nano-TiO 2 hydrosol in the padding tank, the temperature of the hydrosol is maintained at 20-60 °C, and the fabric walks The speed is 20 ⁇ 40m / min;
  • a further improvement scheme of the present invention is that the particle size of TiO 2 in the photocatalyst nano-TiO 2 hydrosol is 1-10 nanometers.
  • a further improvement scheme of the present invention is that the PH value of the photocatalyst nano-TiO 2 hydrosol is 2.5 to 4.0, and the mass content of TiO 2 is more than 2.8%.
  • a further improvement scheme of the present invention is that the photocatalyst nano-TiO 2 hydrosol is slightly yellow and translucent, and the absorbance is 0.07 to 0.11.
  • a further improvement of the present invention is that the fabric is fiber cloth.
  • the invention also discloses the photocatalyst fabric prepared by the method.
  • the solid content rate of the photocatalyst nano-TiO 2 per square meter of the fabric is more than 80%.
  • the fabric walking speed is limited to the fabric walking speed of 20-40 m / min
  • the temperature of the hydrosol is maintained at 20-60 ° C
  • the setting drying temperature is 160-180 ° C.
  • the purpose of defining the process conditions is that the nano-TiO 2 water content on the surface of the final photocatalyst fabric is as high as 80% or more, to improve the stability of the photocatalyst fabric product and the final catalytic performance of the photocatalyst.
  • the walking speed of the fabric guarantees the immersion time of the fabric in the hydrosol, and the TiO 2 particle concentration in the hydrosol meets the sizing rate of the fabric.
  • the solid content of TiO 2 in the fabric after rolling is not less than 80%.
  • the temperature of the hydrosol in the padding tank is controlled between 20 and 60 °C. When it is lower than 20 °C, the concentration stability is poor. The TiO 2 in the hydrosol precipitates and the activity decreases; but it cannot be higher than 60 °C. Energy consumption, and the water in the water sol is easy to evaporate and lose, causing the concentration to increase and TiO 2 to precipitate.
  • the setting drying temperature is 160 ⁇ 180 °C, if it is lower than 160 °C, the fabric can not be dried, causing the fabric to fade; if it is higher than 180 °C, under the condition of limited walking speed, the evaporation speed is too fast, and the solvent carrying TiO 2 particles is fast After evaporation, the TiO 2 particles have not effectively attached to the fabric, causing the TiO 2 particles to fall off, and the solid content is less than 80%.
  • the photocatalyst TiO 2 hydrosol with TiO 2 particle size of 5 nanometers and 3% content was used to finish the fabric.
  • the photocatalyst fabric is obtained by rolling, drawing, setting and drying.
  • the setting and drying temperature is 160 °C.
  • the photocatalyst fabric is obtained by rolling, drawing, setting and drying.
  • the setting and drying temperature is 170 °C.
  • the fabric is immersed in the padding tank equipped with photocatalyst nano-TiO 2 hydrosol by the conveying roller, the hydrosol temperature is maintained at 60 °C, and the fabric travel speed is 40 m / min;
  • the photocatalyst fabric is obtained by rolling, drawing, setting and drying after the fabric leaves the immersion chute.
  • the setting and drying temperature is 180 °C.
  • Step (1) The temperature of the hydrosol is maintained at 10 ° C, and the rest is as in Example 1.
  • Step (1) The temperature of the hydrosol is kept at 80 ° C, and the rest is as in Example 1.
  • step (1) the walking speed of the fabric is 15 m / min, and the rest is the same as in Example 1.
  • step (1) the walking speed of the fabric is 45 m / min, and the rest is the same as in Example 1.
  • step (2) the setting drying temperature is 155 ° C, and the rest is the same as in Example 1.
  • step (2) the setting drying temperature is 185 ° C, and the rest is the same as in Example 1.
  • Rhodamine B Take Rhodamine B aqueous solution with a concentration of 50mg / L, wet the cloth sample for 30 seconds and take it out, and drip the water vertically until no water drops flow;
  • Step (1) The temperature of the hydrosol in the padding tank is controlled between 20 and 60 °C. When it is lower than 20 °C (Comparative Example 1), the concentration stability is poor. TiO 2 is precipitated in the hydrosol and the activity decreases; above 60 °C (Comparative Example 2) Above this temperature, the water in the hydrosol evaporates and loses, the concentration increases, and TiO 2 also precipitates. Therefore, the final TiO 2 solid content on the fabric is less than 80%, and the photocatalytic performance detection effect is poor.
  • Step (1) The walking speed of the fabric guarantees the immersion time of the fabric in the hydrosol, and with the concentration of TiO 2 particles in the hydrosol, it satisfies the glue rate of the fabric, which is less than 20 m / min (Comparative Example 3). 2
  • the solid content is not improved, but the production efficiency is slowed down; higher than 40 meters per minute (Comparative Example 4), the solid content of TiO 2 on the fabric after rolling is significantly lower than 80%.
  • Step (2) The setting drying temperature is 160 ⁇ 180 °C, if it is lower than 160 °C (Comparative Example 5), the fabric cannot be dried, causing the fabric to fade; if it is higher than 180 °C (Comparative Example 6), under the conditions of limited walking speed Under the condition that the evaporation rate is too fast, the solvent carrying the TiO 2 particles quickly volatilizes, and the TiO 2 particles have not been effectively attached to the fabric, causing the TiO 2 particles to fall off, and the solid content is less than 80%.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Chemical Or Physical Treatment Of Fibers (AREA)
  • Catalysts (AREA)

Abstract

一种光触媒纳米TiO 2水溶胶固结于织物的方法及光触媒织物，生产中限定织物行走速度为织物行走速度为20～40米/分钟，水溶胶温度保持20～60℃，定型烘干温度为160～180℃。工艺条件的限定目的在于最终产出的光触媒织物表面的TiO 2水溶胶含固率达80％以上，提升光触媒织物产品的稳定和光触媒的最终催化性能。

Description

光触媒纳米TiO 2水溶胶固结于织物的方法和光触媒织物 技术领域
本发明涉及光催化材料领域，具体涉及光触媒纳米TiO 2水溶胶固结于织物的方法和光触媒织物。
背景技术
光催媒是一种以纳米级TiO 2为代表的具有光催化功能的光半导体材料的总称，是当前国际上治理室内环境污染的理想材料，在光线的作用下，产生强烈催化降解功能，能有效地降解空气中如甲醛等有毒有害气体，能有效杀灭多种细菌，抗菌率高达99.99％，并能将细菌或真菌释放出的毒素分解及无害化处理，同时还具备除臭、抗污等功能。
近年来，由于“装修污染症候群”的出现，室内环境污染问题频现，成为人们关注的热点。据权威报道，在我国70％以上的家庭装修污染超标，且污染严重超标达30％以上。它不但会引发肺炎、气管炎、白血病、脑血栓等疾病，还可能导致孕妇流产、新生儿畸形等一系列疾病。
将纳米级TiO 2整理于织物表面，形成光触媒产品，满足消费者“安全需求”，市场前景极为广阔。如上所述，光触媒在光的照射下，会产生类似光合作用的光催化反应，产生出氧化能力极强的自由氢氧基和活性氧，具有很强的光氧化还原功能，因此光触媒的单位体积的表面积越大，光催化反应的作用越强，产生出的自由氢氧基和活性氧越多，可以说粒径大小是光触媒优劣的关键指标， 这就要求光触媒在制备以及后续存放和使用过程中，不仅需要TiO 2粒径应足够的小，同时需要TiO 2不能发生团聚现象，影响光反应面积。
同时水溶胶中的纳米级TiO 2固着于织物表面的含固率，直接影响光触媒织物产品最终的催化性能。因此上胶整理过程中，保证水溶胶的稳定性及含固率至关重要。
发明内容
本发明要解决的技术问题是提供光触媒纳米TiO 2水溶胶固结于织物的方法，可保证织物表面纳米级TiO 2含固率达80％以上，稳定性高，光催化性能强。
本发明通过以下技术方案实现：
光触媒纳米TiO 2水溶胶固结于织物的方法，
(1)织物经输送辊传送至装有光触媒纳米TiO 2水溶胶的浸轧槽，并从浸轧槽内的光触媒纳米TiO 2水溶胶中穿过，水溶胶温度保持20～60℃，织物行走速度为20～40米/分钟；
(2)织物出浸转槽后过轧压、引布、定型烘干制得光触媒织物，定型烘干温度为160～180℃。
本发明进一步改进方案是，光触媒纳米TiO 2水溶胶中的TiO 2粒径为1～10纳米级。
本发明更进一步改进方案是，光触媒纳米TiO 2水溶胶PH值为2.5～4.0，TiO 2质量含量为2.8％以上。
本发明更进一步改进方案是，光触媒纳米TiO 2水溶胶呈微黄色半透明状，吸光度为0.07～0.11。
本发明再进一步改进方案是，所述织物为纤维布。
本发明还公开了该方法整理而得的光触媒织物。所述织物每平方米光触媒纳米TiO 2含固率为80﹪以上。
本发明与现有技术相比，具有以下明显优点：
本发明光触媒纳米TiO 2水溶胶用于整理织物的方法中限定织物行走速度为织物行走速度为20～40米/分钟，水溶胶温度保持20～60℃，定型烘干温度为160～180℃。工艺条件的限定目的在于最终产出的光触媒织物表面的纳米TiO 2水含因率高达80％以上，提升光触媒织物产品的稳定和光触媒的最终催化性能。
织物行走速度保证了织物在水溶胶中的浸泡时间，配合水溶胶内TiO 2粒子浓度，满足织物上胶率，经轧辊轧压后面料中TiO 2含固率不低于80％。
浸轧槽内水溶胶温度控制在20～60℃之间，当低于20℃，浓度稳定性差，水溶胶内TiO 2析出，活性下降；但也不能高于60℃，高于该温度不仅增加能耗，且水溶胶中水份易蒸发散失，造成浓度增大TiO 2析出。
定型烘干温度为160～180℃，如低于160℃，织物不能烘干，造成织物退色；如高180℃，在行走速度限定的条件下，蒸发速度过快，承载TiO 2粒子的溶剂迅速挥发，TiO 2粒子还未能有效地附着于织物，致使TiO 2粒子产生脱落，含固率低于80％。
具体实施方式
采用TiO 2粒径为5纳米级、含量为3％的光触媒TiO 2水溶胶整理织物。
实施例1
(1)织物经输送辊传送行浸于装有光触媒纳米TiO 2水溶胶的浸轧槽，水溶胶温度保持20℃，织物行走速度为20米/分钟；
(2)织物出浸转槽后经过轧压、引布、定型烘干制得光触媒织物，定型烘干温 度为160℃。
实施例2
(1)织物经输送辊传送行浸于装有光触媒纳米TiO 2水溶胶的浸轧槽，水溶胶温度保持50℃，织物行走速度为30米/分钟；
(2)织物出浸转槽后经过轧压、引布、定型烘干制得光触媒织物，定型烘干温度为170℃。
实施例3
(1)织物经输送辊传送行浸于装有光触媒纳米TiO 2水溶胶的浸轧槽，水溶胶温度保持60℃，织物行走速度为40米/分钟；
(2)织物出浸转槽后经过轧压、引布、定型烘干制得光触媒织物，定型烘干温度为180℃。
比较例1
步骤(1)水溶胶温度保持10℃，其余如实施例1。
比较例2
步骤(1)水溶胶温度保持80℃，其余如实施例1。
比较例3
步骤(1)中织物行走速度为15米/分钟，其余如实施例1。
比较例4
步骤(1)中织物行走速度为45米/分钟，其余如实施例1。
比较例5
步骤(2)中定型烘干温度为155℃，其余如实施例1。
比较例6
步骤(2)中定型烘干温度为185℃，其余如实施例1。
对实施例1～3和比较例1～6生产的光触媒织物进行质量检测。
1、光触媒织物TiO含固率检测
A、根据比色灯箱内的尺寸大小，将光触媒布样，分别剪成25cm*25cm见方的小样4块，其中的一份布作为对照样，放置一边，其余的布样放入搪瓷托盘内平铺摆放；
B、取浓度50mg/L的罗丹明B水溶液，将布样充分润湿30秒拿出，并垂直滴出水分，直至无水滴流下；
C、打开比色灯箱电源，将样品放入比色灯箱内用200W射灯照射，要注意布面无光影，确保全面照射到；
D、对照未处理样，每隔固定时间观察一次布样的褪色情况，直至部门颜色由红变浅，直至无色，布样褪色时间越短，表明光触媒TiO 2织物布面光催化性能越强，统计布样褪至无色所用时间。
E、从拿出布样，用笔划出红色不褪色部分，并算出该部分的面积，再按照公式计算，TiO 2含固率＝(布样总面积-布样不褪色部分面积)/布样总面积*100％2、光触媒织物布面光催化性能检测
A、将同质量的布，分别剪成2cm*2cm见方的小样，其中的一份布作为对照样(未用水溶胶整理)，其余的布样分别为实施例1、2、3和比较例1～6水溶胶整理后布样，将对照样布和用水溶胶整理后的布分别放入250ml烧杯内，贴好标签(易于分别)；
B、向装有样品的烧杯内，用吸量管各加入50ml浓度50mg/L罗丹明B，用玻璃棒搅动样品平铺摆放；
C、打开比色灯箱电源，将装有样口的烧杯放入比色灯箱内用200W射灯照射；
D、将测定波长调至550nm，用1cm比色皿对照空白，每隔一刻钟观察一次样品的吸光度，吸光度越小(颜色由深红变浅红，直至无色)，表明光触媒光催化性能越强，统计样品褪至无色所用时间。
Figure PCTCN2018111836-appb-000001
由实施例与对比例可以看出，实施例1至实施例3整理后的织物TiO 2含固率均超80％以上，布面催化性能力强，整理后的织物无褪色现象。
步骤(1)浸轧槽内水溶胶温度控制在20～60℃之间，当低于20℃(比较例1)，浓度稳定性差，水溶胶内有TiO 2析出，活性下降；高于60℃(比较例2)，高于该温度水溶胶中水份蒸发散失，浓度增大，TiO 2也有析出，因此最终织物上TiO 2含固率均达不到80％，光催化性能检测效果差。
步骤(1)织物行走速度保证了织物在水溶胶中的浸泡时间，配合水溶胶内TiO 2粒子浓度，满足织物上胶率，低于20米/分钟(比较例3)，最终对于织物上TiO 2含固率没有提升，但拉慢了生产效率；高于40米/分钟(比较例4)，经轧辊轧压后面料上TiO 2含固率明显低于80％。
步骤(2)定型烘干温度为160～180℃，如低于160℃(比较例5)，织物不能烘干，造成织物退色；如高180℃(比较例6)，在行走速度限定的条件下，蒸发速度过快，承载TiO 2粒子的溶剂迅速挥发，TiO 2粒子还未能有效地附着于织物，致使TiO 2粒子产生脱落，含固率低于80％。

Claims (7)

  1. 光触媒纳米TiO 2水溶胶固结于织物的方法，其特征在于：
    (1)织物经输送辊传送至装有光触媒纳米TiO 2水溶胶的浸轧槽，并从浸轧槽内的光触媒纳米TiO 2水溶胶中穿过，水溶胶温度保持20～60℃，织物行走速度为20～40米/分钟；
    (2)织物出浸转槽后过轧压、引布、定型烘干制得光触媒织物，定型烘干温度为160～180℃。
  2. 如权利要求1所述的光触媒纳米TiO 2水溶胶固结于织物的方法，其特征在于：光触媒纳米TiO 2水溶胶中的TiO 2粒径为1～10纳米级。
  3. 如权利要求1或2所述的光触媒纳米TiO 2水溶胶固结于织物的方法，其特征在于：光触媒纳米TiO 2水溶胶PH值为3.0～4.0，TiO 2质量含量为2.8％以上。
  4. 如权利要求1或2所述的光触媒纳米TiO 2水溶胶固结于织物的方法，其特征在于：光触媒纳米TiO 2水溶胶呈微黄色半透明状，吸光度为0.07～0.11。
  5. 如权利要求1所述的光触媒纳米TiO 2水溶胶固结于织物的方法，其特征在于：所述织物为纤维布。
  6. 权利要求1至5任一项方法制得的光触媒织物。
  7. 如权利要求6所述的光触媒织物，其特征在于：所述织物每平方米光触媒纳米TiO 2含固率率为80﹪以上。
PCT/CN2018/111836 2018-10-25 2018-10-25 光触媒纳米TiO 2水溶胶固结于织物的方法和光触媒织物 WO2020082288A1 (zh)

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JP2000110098A (ja) * 1998-10-05 2000-04-18 Nippon Paper Industries Co Ltd 酸化チタン複合粒子担持シートおよび酸化チタン複合粒子の製造方法
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