壳聚糖衍生物在活性染色中的应用

以壳聚糖为原料,合成了N-羟丙基十二烷基二甲基氯化铵壳聚糖(HDCC)和O-甲基丙烯酰胺-N-羟丙基十二烷基二甲基氯化铵壳聚糖(NMA-HDCC);研究了经壳聚糖(CTS),HDCC和NMA-HDCC预处理棉织物在活性染料无盐染色时的染色性能,如上染率、固色率、K/S值及色牢度性能,并与未预处理无盐染色及传统有盐染色进行对比。结果表明,对棉织物进行CTS,HDCC和NMA-HDCC预处理具有良好的促染作用,对提高活性染料的上染率和固色率有一定效果;CTS和HDCC能提高染色棉织物的K/S值,但色牢度较低;NMA-HDCC可与纤维素纤维形成共价键,能够显著提高染色织物的色牢度。     

季铵化壳聚糖改性棉织物活性无盐染色

用季铵化试剂3-氯-2-羟丙基三甲基氯化铵(CTA)对壳聚糖(CTS)进行改性,制备了季铵盐壳聚糖类衍生物2-羟丙基三甲基氯化铵-壳聚糖(CTA-CTS)。优化的改性工艺为:反应时间10 h,反应温度65℃,反应物质量比为:m(氢氧化钠)∶m(壳聚糖)=1∶1,m(CTA)∶m(壳聚糖)=3∶1。CTA-CTS应用于棉织物表面改性,不仅可以实现无盐染色,而且还能在不降低色牢度的情况下改善染色效果。     

壳聚糖在活性染料染色中的应用

研究了活性染料对经壳聚糖处理后的棉织物的染色性能,讨论了壳聚糖浓度、轧余率、焙烘温度和焙烘时间对染色性能的影响。结果表明,棉织物经壳聚糖处理后,染料上染率有所提高。     

水溶性、反应性壳聚糖衍生物在活性染料无盐染色中的应用研究

以脱乙酰度大于90%的壳聚糖(CTS)为原料,首先在其氨基上引入2,3-环氧丙基三甲基氯化铵(GTA),得到中间产物N-羟丙基三甲基氯化铵壳聚糖(HTCC),接着在6位羟基上引入羟甲基丙烯酰胺(NMA),得到终产物O-甲基丙烯酰胺-HTCC(NMA-HTCC).比较经CTS、HTCC和NMA-HTCC分别处理后的棉布染色效果与未处理棉布无盐和加盐的染色效果,结果表明,对于上染率和固色率、K/S值及色牢度,处理棉布的染色效果均比无盐未处理的染色效果有所提高.     

膨润土负载壳聚糖在活性染色净洗中的应用

以天然钙基膨润土为原料负载壳聚糖,制备一种复合吸附剂,并将其用于活性翠蓝KN-G染色棉织物的净洗.对膨润土负载壳聚糖进行了X射线衍射和红外光谱分析,考察了负载壳聚糖对净洗性能的影响.结果表明,壳聚糖与膨润土的较佳质量比为1:5,壳聚糖的脱乙酰度为90%,分子质量为100 kDa;净洗后的活性染料染色织物皂洗牢度可达到常规净洗剂的净洗效果,而净洗残液的吸光度值和CODCr值仅为常规的1/10.     

PDMAEMA阳离子改性剂在无盐染色中的应用

采用电子转移活化再生催化剂原子转移自由基聚合(ARGET-ATRP)法制备了结构精确,分子量均匀,分子量分布较窄的pH值、温度响应型聚合物聚甲基丙烯酸N,N-二甲基氨基乙酯(PDMAEMA),利用硅烷偶联剂KH-550将纤维素分子和PDMAEMA成功键合,使聚合物分子接枝在纤维表面,通过改变染色条件来探究最佳染色工艺。并评价了改性织物的染色性能。结果表明,与未改性织物的有盐染色相比,有更好的固色率和匀染性,解决了染色不匀的问题。     

WLS-20改性棉织物的活性无盐染色

采用自制的阳离子羽毛蛋白改性剂WLS-20对棉织物改性,并进行活性无盐染色。结果表明,改性剂WLS-20处理后的棉织物上染百分率与固色率均超过未改性棉织物传统加盐染色效果,并获得比阳离子改性剂WLS更好的染色效果。     

HE型活性染料在溶剂水体系中的无盐染色

采用HE型活性染料在乙醇 水体系中对棉织物进行无盐染色,并与常规染色效果进行比较。结果表明：乙醇 水体系中乙醇体积分数达到90%时,染料的上染率和固色率达到最大值;NaOH溶液预处理棉织物和升高染色温度有利于提高固色率,固色率较常规水溶液染色工艺提高了4.5%～43.8%。     

阳离子醚化改性棉织物活性无盐染色

用3-氯-2-羟丙基三甲基氯化铵(CHPTMA)对棉织物进行改性,再采用活性艳蓝KN-R和活性金黄B-4RFN进行染色.优化的预处理工艺为:CHPTMA 30g/L,NaOH 10 g/L,处理温度80℃,处理时间30 min.经检测,改性棉织物染色后的耐摩擦色牢度在4级以上,与常规加盐染色工艺相当.     

壳聚糖在棉织物甘蓝红染色中的应用

棉织物经壳聚糖处理后,再用甘蓝红进行染色。探讨壳聚糖改性液浓度、浸渍温度和浸渍时间对改性效果的影响,以及染料用量、pH值、时间和温度对染色效果的影响。结果表明,壳聚糖对棉织物的改性工艺为:壳聚糖改性液25%,80℃浸渍30 min;甘蓝红染色工艺为:染料7%(omf),pH值6,50℃染色60 min。改性后棉织物的染色深度和防紫外线性能均有提高,耐摩擦牢度也较高。     

棉织物经无盐染色剂BEBA改性后其染色性能的研究

研究了无盐染色剂BEBA对棉织物改性后的染色性能，比较了织物改性前后的吸附等温线、染色速率曲线和K／S值．研究发现，改性后棉织物的吸附等温线为朗缪尔型，而未改性织物的为弗莱因德利胥型；改性后织物的上染速率比未改性的快，上染百分率、固色率和K／S值也比未改性织物大，摩擦和耐皂洗牢度提高0．5级，分别达到4级和4-5级．     

HBP—NH_2接枝氧化棉织物无盐染色机制

为揭示HBP—NH2接枝氧化棉织物(HGCF)实现活性染料无盐染色的机制,研究水溶液中HGCF纤维表面的zeta电位、HGCF活性染料染色热力学、染色动力学以及HGCF染色色光的变化等。结果表明:当pH<6.5时,在水溶液中HGCF纤维表面的zeta电位为正;HGCF对活性艳黄A-4GLN的吸附符合Langmuir模型,Langmuir吸附常数和饱和吸附量都随着温度的升高而降低,染色热为-4.51 kJ/mol;与未接枝棉织物相比,HBP—NH2对氧化棉织物的接枝改性可以加快上染速率,提高平衡上染百分率,增大表观扩散系数;HBP—NH2的接枝改性对棉织物活性染料无盐染色色光略有影响。     

壳聚糖浸渍处理对棉织物活性染料染色的影响

棉织物经壳聚糖处理后，再分别用X型、K型、B型活性染料进行染色。探讨了壳聚糖处理温度、时间及其浓度对织物染色性能的影响。棉织物浸渍壳聚糖的条件温度以60℃，时间则以超过30min以上为宜；壳聚糖浓度高，利于染色，但浓度过高，对织物手感有不良影响。试验结果表明，壳聚糖浸渍处理棉织物后再染色，浮色少、色泽稳定、摩擦牢度较高。     

Application of polyethylene glycol,cetrimide, chitosan and their mixtures on cotton muslin fabric to improve rot resistance,antimicrobial property and its salt-free reactive dyeing

In the present work, cotton muslin fabric is treated with eco-friendly antimicrobial agents in order to observe the effect of those chemicals on the rot resistance properties, physical appearance, important textile-related mechanical properties and dyeability with reactive dyes. The cotton fabric has been treated with polyethylene glycol (PEG 200), cetrimide and chitosan individually and their blends, in the presence of citric acid and sodium hydrogen phosphate as mixed catalyst to investigate the effect of such treatment on fabric properties of treated cotton mentioned above. Amongst all individual and combined applications of above said chemicals, it is observed that treatment with a mixture of chitosan and PEG is showing good result in terms of improvement in rot resistance performance and an optimum balance in other textile-related mechanical and appearance properties indicating lowest degradation against microbial attack. A series of experiments were undertaken with varying percentage of both the chemicals to arrive at the optimum ratio of mixture of PEG and chitosan and compared with such effect for treatment with conventional quaternary ammonium compound EPTAC. This treatment shows much balance results and also creates a newer provision of salt-free reactive dyeing of such treated/cationized cotton muslin fabric by unconventional reactive dyeing in acid bath after such chemical treatment/modifications.     

Cationization of cotton using cattle hoof and horn for salt-free reactive dyeing

Cattle hoof and horn keratin hydrolysate from cattle hoofs and horns were successfully extracted and used to cationize cotton fabric. The effect of cationization was tested by dyeing the cationized cotton fabric using reactive dyes (cationized sample). The results were compared to conventionally dyed cotton fabric sample without cationization. The UV/VIS absorption result showed 6% improvement in exhaustion; the Color Eye K/S result gave 4.5% improvement in fixation and 6.8% in dye utilization for reactive dye (H-Reactive Red). Acceptable color fastness to washing (4/5) and light fastness (7) were achieved on cationized sample.