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In this paper, a silane coupling agent, 3-aminopropyltriethoxysilane, was reacted with nano-TiO2 to introduce amino group onto it which was then reacted with trichlorotriazine to obtain a dichlorotriazine functionalized nano-TiO2 for the firm fixation of it on cotton fibers. The reaction process was monitored by the titration of primary and secondary amino groups, and the reaction conditions were optimized with orthogonal method accordingly. The dichlorotriazine functionalized nano-TiO2 was reacted with cotton fabric by the nucleophile substitution reaction to afford nano-TiO2 functionalized cotton fabric, the structure and surface morphology of the nano-TiO2 finished cotton fibers were studied by FT-TR and SEM. In addition, the fixation duration of the nano-TiO2 modified cotton was studied according to AATCC test method 61–2010. The results show that the washing fastness of the nano-TiO2 is excellent.

Bleaching of cotton fabric with hydrogen peroxide (H2O2) is conventionally carried out under high temperature and strong alkaline conditions, for which the pad-steam process can be employed to present the benefits in lowering water and chemical consumptions. A notable drawback observed with the pad-steam process for bleaching of cotton fabric with H2O2 is that, although the cotton fabric is bleached to an acceptable whiteness, it is required to dwell in steam for almost an hour, causing tremendous energy consumption as well as extensive damage to the cotton fibers. It has been found that an activated peroxide system can be formed with the addition of N-[4-(triethylammoniomethyl)benzoyl]caprolactam chloride (TBCC) to H2O2 solution to generate 4-(triethylammoniomethyl)perbenzoic acid (TPA), allowing the establishment of a rapid pad-steam process. Sodium citrate was selected as the desired alkali for use in the rapid pad-steam process to neutralize 4-(triethylammoniomethyl)benzoic acid (TBA) released from th...

A cellulosic adsorbent (PDA–MCC) was prepared by halogenation of microcrystalline cellulose (MCC) and functionalized with pyridone diacid (PDA) for removing lead and cobalt ions from aqueous solutions. PDA–MCC was characterized by Fourier transform infrared spectroscopy, scanning electron microscope, and thermal gravimetric analysis. The performance of PDA–MCC in removing lead and cobalt ions was examined by investigating the adsorption behaviors of lead and cobalt ions on PDA–MCC. Results from the adsorption of lead and cobalt ions on PDA–MCC showed that the adsorption kinetics followed the pseudo-second-order kinetic model, and the adsorption isotherms could be described by the Langmuir model. The maximum adsorption capacities of PDA–MCC towards lead and cobalt ions were determined to be 177.75 and 122.70 mg/g, respectively, which are greater than those of most reported cellulosic adsorbents. The reusable experiment showed that PDA–MCC could be regenerated in an acid solution, and had the adsorption capacities remained greater than 75% even after five cycles of regeneration.

The oxygen low-temperature plasma (LTP) treatment on knitted woolen fabric was carried out to investigate the changes of shrinkage resistance, bursting strength and moisture absorption of knitted woolen fabric after treatment. In addition, the effects of different levels of exposure time, treatment power and gas flow rate on the change of felting rate, bursting strength and moisture absorption of knitted woolen fabric in the process of LTP were investigated. The results show that LTP treatment can improve the anti-felt, bursting strength, moisture absorption of knitted woolen fabric. According to the analysis of variance, in the process of LTP treatment, the exposure time is the primary factor that affects the degree of change in the hygroscopicity of knitted woolen fabric, and treatment power is the main factor that affects the degree of change in the shrinkage resistance of knitted woolen fabric. Finally, under the experimental conditions, the best treatment process of knitted woolen fabric by oxygen low-temperature plasma is 20 min, 150 sccm and 400 w.