Blue Calico Printing and Dyeing Craft in Tongxiang

BLUE calico is a traditional Chinese handmade printed fabric.Dyed in indigo,it has a blue base with white patterns.Tongxiang,a city in east China’s Zhejiang Province,is well-known for printing and dyeing blue calico.The craft boasts a history of a millennium in the town with its heyday in the Tang(618-907)and Song(960-1279)dynasties.The technique was widely applied by the general public during the Ming and Qing dynasties(1368-1911).

Green and healthy innovation is the future of dyeing and printing industry

In the past year,the downside risks of the world economy increased,and China's domestic economy was impacted by multiple factors such as pandemic situation and extreme weather disasters,and the uncertainty of the dyeing and printing industry increased significantly.Last year,the production and benefit of the industry showed an obviously downward trend.The export of major dyeing and printing products has maintained growth,and the export performance has been good,but the rate has gradually declined.Generally speaking,in 2023,the industry and enterprises are stillfacing considerable production and operation pressure.

Desalting?Reversible dyeing?Dyeing and printing industry ushers in big changes!

Textile dyeing is the second-largest polluter of water worldwide,not including salt use.After the salt is used,it is transported to landfills or the ocean.Oceans have increased 0.5%salinity over past 10 years.Textile dyeing produces 2.8%of Global GHG,because of its huge demand of power from its operations.Now,the world’s dyeing and printing industry energy saving,consumption reduction,emission reduction,green,safety requirements are increasing.Green dyeing and printing have become the mainstream of global dyeing and printing industry in future.The continuous innovation and improvement of textile dyeing process and dyestuff is of extraordinary significance in today’s increasingly severe energy situation.

Dyeing and printing wastewater treatment using fly-ash coated with chitosan

Printing and dyeing industry is a considerable source of environmental contamination. In this study treatment of printing and dyeing wastewater with a new type of sewage treatment agent, fly-ash coated with chitosan particles （FCCP）, was examined. The effects ofpH, stirring time, sedimentation time and temperature on color, COD, turbidity and NH3-N removal were determined. The optimum dosage of FCCP and the influence of individual factors on removal efficiency were tested. The optimum parameters determined using the L16 （45） orthogonal experiment were as follows： FCCP （weight ratio of chitosan to fly-ash 1：6） dosage, 4 g.L^-1; temperature, 35℃; pH, 4. The stirring time and sedimentation time were 20 min and 5 h, respectively. Under these optimum conditions, the color, COD and NH3-N removal ratios were 97%, 80% and 75%, respectively.

Design and Operation of the Printing and Dyeing Wastewater Treatment Project by Combination of Coagulation Sedimentation - Hydrolytic Acidification with Aeration Tank - Biological Aerated Filter - Active Sand Filter

In order to protect quality of Baiyangdian surface water and Gaoyang groundwater,the project is applied to process printing and dyeing wastewater that contains complicated compositions,high concentrations of organics and SS,and lots of pollutants difficult to degrade by microorganism. The process and operating parameters of project are optimized and debugged,and its economic and environmental benefits are analyzed.The results show that the process of coagulation sedimentation-hydrolytic acidification with aeration tank-biological aerated filter-active sand filter is applied in Gaoyang Sewage Treatment Plant. The design scale of sewage treatment plant is 120000 m^3/d. The influent is as following: COD is 669mg/L; SS is 424mg/L; NH_3-N is 8.83mg/L; TP is 6.03mg/L. After the process,the best removal rates of COD,SS,NH_3-N and TP are 93. 5%,98. 8%,97. 1% and 96. 2%,respectively. The various indexes of effluent water complied with standard A of the first order in Pollutants Emission Standard of Urban Wastewater Treatment Plant( GB 18918-2002). The processing cost is only 0. 807 yuan/m^3. As a result,the project construction and operation not only improve the environment,but also promote regional economic development. Process design and operating parameters provide an important reference value for the printing and dyeing wastewater treatment industry.

Dyeing and printing industry:Scientific and technical progress,energy-saving and environmental protection have achieved balanced development Interview with Chen Zhihua,president of China Dyeing and Printing Association

The general operation of dyeing and printing industry maintained a trend of slow stabilization during the 12th Five-Year Program period with obvious results in science and technology,management,energy conservation and environmental protection as well as the balanced development of the industries.Chen Zhihua,president of China Dyeing and Printing Association(CDPA),said that the dyeing and printing industry has in-

Modified Dye for Water-Fast Ink-Jet Printing

A quaternary ammonium compound containing amino acid residue was synthesized by Converting 3-chloro-2-hydroxy- propyalkyldimethylammonium chlorides into its epoxide derivatives, then attaching an amino acid to the epoxide derivatives synthesized a quaternary ammonium compound containing amino acid residue. Modified dyes were prepared by the ionotropy of anionic dyes with the quaternary ammonium compound containing amino acid residue. It was discovered that the modified dyes exhibited an excellent pH controllable solubility. These modified dyes have good water solubility at pH> 8.0, but they were water insoluble at pH < 6.5. On the printing paper, modified dyes in water-based ink-jet print ink could convert to water insoluble form and give prints excellent water fastness.

Dye-sensitized solar cell module realized photovoltaic and photothermal highly efficient conversion via three-dimensional printing technology

Three-dimensional （3D） printing technology is employed to improve the photovoltaic and photothermal conversion efficiency of dye-sensitized solar cell （DSC） module. The 3D-printed concentrator is optically designed and improves the photovoltaic efficiency of the DSC module from 5.48% to 7.03%. Additionally, with the 3D-printed microfluidic device serving as water cooling, the temperature of the DSC can be effectively controlled, which is beneficial for keeping a high photovoltaic conversion efficiency for DSC module. Moreover, the 3D-printed microfluidic device can realize photothermal conversion with an instantaneous photothermal efficiency of 42.1%. The integrated device realizes a total photovoltaic and photothermal conversion efficiency of 49% at the optimal working condition.

Dyeing and Printing Industry (1-9,2005)

Although the Dyeing and Printing industry has experienced several international disputes, an in- crease in raw material prices and a two percent rise in the value of RMB since January 2005, it has remained a steady increase in production as well as profit making, and the quality of products has met its

负载型三维电极-电Fenton法处理活性艳橙X-GN废水

三维电极-电Fenton法是一种在电Fenton的基础上引入三维电极电催化技术的新型高级氧化法,在水处理中得到了广泛的应用。用过量浸渍煅烧法制备负载型三维电极,以采用该电极的三维电极-Fenton法处理活性艳橙X-GN废水。通过试验研究了pH、电压、Na_(2)SO_(4)投加量、Fe^(2+)投加量对处理效果的影响,并采用响应曲面法最优化实验条件。结果表明,当试验pH=4.7,电压为20.39 V,Na_(2)SO_(4)投加量为2.13 g/L,Fe^(2+)投加量为2.5 mmol/L时,COD和色度去除率可以达到85.41%和92.18%。负载型三维电极-电Fenton法对活性艳橙X-GN废水的色度和COD均具有较理想的处理效果。

沸石咪唑酯骨架-8的制备及其对刚果红的吸附性能

为制备印染废水的吸附材料,以六水合硝酸锌和2-甲基咪唑为原材料,以去离子水作溶剂,采用水溶剂法制备沸石咪唑酯骨架-8(ZIF-8)材料。借助扫描电子显微镜、红外光谱仪、X射线衍射仪等探究ZIF-8材料的结构,测试其对阴离子刚果红染料的吸附性能,并分析其吸附机制。结果表明:ZIF-8颗粒大小均匀,表面光滑,呈多面体结构;其热裂解温度为258℃,具有良好的热稳定性;ZIF-8对刚果红的吸附更符合准二级动力学模型和Langmuir吸附等温线模型,即以化学吸附为主且吸附位点等效;吸附过程为自发进行的放热反应,低温有利于吸附;在温度为20℃、pH值为7的条件下,ZIF-8对95 mg/L的刚果红溶液的吸附效果最佳,吸附量可达671.41 mg/g。

Procion MX Dyes在彩色蜡染制作工艺中的应用研究

文章以彩色蜡染制作工艺为研究对象,将文献研究法与实践相结合,从画蜡技巧、上色与固色原理、艺术表现技巧等方面解读Procion MX Dyes在彩色蜡染制作工艺中的应用原则和技巧。借助Procion MX Dyes的应用,提升了彩色蜡染的艺术表现力和使用价值,为蜡染产业的发展提供了可行性参考。

壳聚糖-魔芋葡甘聚糖复合絮凝剂在印染污水处理中的应用

利用改性-交联的方法制备壳聚糖/魔芋葡甘聚糖复合絮凝剂,以亚甲基蓝为例,对印染废水进行处理。探究了壳聚糖/魔芋葡甘聚糖复合絮凝剂的用量、吸附时间以及pH值对印染污水吸附率的影响。结果表明:在常温条件下,亚甲基蓝溶液初始浓度为8.0 mg/L,溶液PH为9,壳聚糖/魔芋葡甘聚糖复合絮凝剂的投加量为0.3 g,吸附时间72 h,亚甲基蓝溶液吸附率达到98.90%。

Biodegradability of terephthalic acid in terylene artificial silk printing and dyeing wastewater

As the characteristic pollutant, terephthalic acid(TA)was in charge of 40%—78% of the total COD of terylene artificial silk printing and dyeing wastewater(TPW-water). The studies on biodegradability of TA were conducted in a serial of activated sludge reactors with TPW-water. TA appeared to be readily biodegradable with removal efficiency over 96.5% under aerobic conditions, hardly biodegradable with removal efficiency below 10% under anoxic conditions and slowly biodegradable with a turnover between 31.4% and 56.0% under anaerobic conditions. TA also accounted for the majority of BOD in TPW-water. The process combined by anoxic, anaerobic and aerobic activated sludge reactor was suitable for TA degradation and TPW-water treatment. Further, the aerobic process was essentially much more effective than the anaerobic or anoxic one to degrade TA in TPW-water.

Stability of expanded granular sludge bed process for terylene artificial silk printing and dyeing wastewater treatment

Terylene artificial silk printing and dyeing wastewater(TPD wastewater), containing averaged 710 mg/L terephthalic acid(TA) as the main carbon source and the character pollutant, was subjected to expanded granular sludge bed(EGSB) process. The stability of the EGSB process was firstly conducted by laboratory experiment. TA ionization was the predominated factor influencing the acid-base balance of the system. High concentration of TA in wastewater resulted in sufficient buffering capacity to neutralize the volatile fatty acids(VFA) generated from substrate degradation and provided strong base for anaerobic system to resist the pH decrease below 6.5. VFA and UFA caused almost no inhibition on the anaerobic process and biogas production except that pH was below 6.35 and VFA was at its maximum value. Along with the granulating of the activated sludge, the efficiency of organic removal and production rate of biogas increased gradually and became more stable. After start-up, the efficiency of COD removal increased to 57%—64%, pH stabilized in a range of 7.99—8.04, and production rate of biogas was relatively high and stable. Sludge granulating, suitable influent of pH and loading were responsible for the EGSB stability. The variation of VFA concentration only resulted in neglectable rebound of pH, and the inhibition from VFA could be ignored in EGSB. The EGSB reactor was stable for TPD wastewater treatment.

Application of New Modified Bentonite in Decolorization of Simulated Printing and Dyeing Wastewater

The problem of colority control of printing and dyeing wastewater has become a technical problem that plagues related companies.Bentonite is an adsorbent with excellent properties.Modification of bentonite with environmentally friendly substances can improve its decolorization performance.In this experiment,the simulated printing and dyeing wastewater was taken as the control object,and the bentonite was modified with environmentally friendly materials such as sodium carboxymethyl cellulose(CMC)and lignin to prepare a new modified bentonite;then the modified bentonite was used to adsorb the simulated wastewater to reduce the water colority and COD;finally the relevant design of the adsorption process was made.Results indicate that M lignin∶M CMC∶M original bentonite=1∶2∶97 had the optimum treatment effect,the optimum modification temperature was 30℃ and the modification time was 4 h;the optimum conditions for the adsorption process were:pH=5,temperature=30℃,reaction time=60 min,dosage=0.05 g of modified bentonite/mL simulated dye solution.The final removal rate of colority and COD reached 95.0% and 98.2%,respectively.Compared with the original bentonite,this new modified bentonite has greater adsorption capacity and thus has greater application value.

可见光-近红外伪装分散染料墨水的制备及其性能

针对当前分散染料墨水其喷墨印花织物仅能与背景环境“同色”而不能“同谱”,无法有效躲避现有侦察技术的问题,开发了一套可见光-近红外伪装分散染料墨水。通过模拟绿叶、土壤和枯叶的反射光谱特征,筛选了特定分散染料,探究了印花工艺对织物伪装及服用性能的影响,通过超细化加工制备了分散染料墨水并探究了其性能。结果表明:调控分散蓝60、分散深蓝SUBC 12、分散橙30、分散黄CPY 015、分散红CPM 011与炭黑复配比例及印花工艺制备的仿绿叶、土壤和枯叶印花织物,其伪装及服用性能良好;5种分散染料墨水的粒径均小于173.00 nm,离心、耐热、高温储存和常温储存稳定性均高于80%,过滤流速分别为200、375、188、428、167 g/min,喷墨印花性能良好。

N-TiO_(2)/聚丙烯复合熔喷非织造材料的制备及其光催化性能

为制备具有光催化功能的聚丙烯(PP)熔喷非织造材料,首先通过溶胶-凝胶法制备氮掺杂二氧化钛(N-TiO_(2))光催化剂,然后采用超声浸渍的方法将N-TiO_(2)均匀负载在PP熔喷非织造材料表面得到N-TiO_(2)/PP复合熔喷材料,并对其结构和性能进行表征和分析,通过自由基捕获实验确定光催化机制。结果表明:N掺杂量为1%的N-TiO_(2)的颗粒大小均匀,粒径约为10 nm,在30 min暗吸附和90 min光照条件下,其光催化降解亚甲基蓝(MB)的效率最佳,达到98%;将该N-TiO_(2)负载在PP熔喷非织造材料表面后,可包裹在PP纤维表面,当负载量超过30 mg后出现团聚现象;负载量为30 mg的N-TiO_(2)/PP复合熔喷材料的光催化降解性能最优,在30 min暗吸附和90 min光照条件下,对亚甲基蓝(MB)的降解效率达到98%;在光激发下N-TiO_(2)会产生超氧自由基和羟基自由基,二者共同降解MB。

Fenton耦合A/O-MBR工艺体系处理印染废水

近年来,印染行业水处理标准不断提高,印染废水中难降解有机物浓度高、传统缺氧/好氧工艺(A/O工艺)达标难等问题亟待解决。本研究开发了Fenton、A/O工艺与MBR(膜生物反应器)的耦合工艺处理印染废水,开展Fenton+A/O-MBR工艺和A/O-MBR+Fenton工艺对比研究,对反应器中微生物菌群结构进行了初步分析。结果表明,该组合工艺对印染废水中常规污染物均具有良好的去除能力,在水力停留时间(HRT)为72 h条件下,两套工艺对COD的总去除率分别为93%与81%,NH3-N的去除率分别为97.9%与92.2%,表现出高效的除碳脱氮特性。反应器内的微生物16S rRNA多样性结果表明,活性污泥在A/O-MBR系统内仍然可以保持较好的生物种类多样性,前置Fenton预处理对A/O-MBR系统内的异养微生物与氮循环微生物菌群结构产生一定影响,从而造成污染物去除效果的差异。然而,Proteobacteria、Chloroflexi、Bacteroidetes和Planctomycetes是两套A/O-MBR反应器中缺氧和好氧池污泥的优势菌门。

baicalin-Fe^(2+)络合染料的制备及对蚕丝织物的印花

为了缩短天然染料印花加工流程和提升印花产品品质,采用黄芩苷与亚铁离子发生配位反应制备络合染料(B-Fe^(2+))。采用红外光谱、紫外-可见分光光度法、表面能谱等对产物进行表征,证实了配位化合物的形成,黄芩苷与亚铁离子配位比为2∶1。将制备的B-Fe^(2+)用于蚕丝织物的印花,得到最佳汽蒸工艺为:汽蒸温度105℃、汽蒸时间20 min。在此条件下,B-Fe^(2+)对蚕丝织物印花具有较高的K/S值,各项色牢度均达到4级及以上,印花织物白底沾色较少。