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纳米分散染料胶囊喷墨印花墨水的制备及其性能

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为提高分散染料喷墨墨水的稳定性和喷射流畅性,采用甲基丙烯酸酯-丙烯酸丁酯共聚物对分散染料进行包覆,制备核壳结构的纳米分散染料胶囊,并配制墨水.研究了纳米分散染料胶囊壳层的玻璃化转变温度和厚度对墨水分散稳定性、过滤性能和喷墨印花织物性能的影响.结果表明:调控共聚单体比例和用量可以控制纳米分散染料胶囊壳层的玻璃化转变温度和厚度;纳米分散染料胶囊壳层的玻璃化转变温度升高和厚度适当增加有助于提升墨水的稳定性;当纳米分散染料胶囊壳层玻璃化转变温度为67.6℃,壳层厚度为 87.5 nm时,纳米分散染料胶囊墨水的耐热稳定性、储存稳定性和离心稳定性分别可以达到 81.6%、96.6%和 80.5%,具有较佳的喷射流畅性,印花织物各项牢度均达到 5 级,且手感柔软.
Preparation and properties of disperse dye nanocapsule inkjet printing ink
Objective In order to improve the stability and inkjet fluency of disperse dye inkjet ink,core-shell disperse dye nanocapsules(DDNC)were prepared,and the influences of glass transition temperature and thickness of disperse dye nanocapsules shell on the stability,filtration and ink-jet printing performance of the ink were studied.Method The DDNC were prepared via emulsion polymerization by using copolymer(P(MMA-co-BA))of methyl methacrylate and butyl acrylate as shell and C.I.Disperse Purple 93 as core.Then the DDNC were configured as ink-jet printing ink,and thermal stability,storage stability,centrifugal stability and filtration performance of the DDNC ink were tested.DDNC ink was used for polyester fabrics.Scanning electron microscope(SEM),spectrophotometric color meter,fabric style testing instrument and fastness meter were adopted to characterize the morphology,color performance,hand feeling and color fastness of the printed fabric.Results The results show that core-shell DDNC were successfully prepared and the glass transition temperature and thickness of P(MMA-co-BA)shell could be controlled by adjusting the proportion and amount of comonomers.the DDNC ink demonstrated significant improvement in thermal stability,storage stability and centrifugal stability compared with C.I.Disperse Purple 93 ink,which is attributed to the shield of the P(MMA-co-BA)shell.The stability of the DDNC ink could be improved by increasing the glass transition temperature of the shell and adopting reasonable shell thickness.When the glass transition temperature of the P(MMA-co-BA)shell was 67.6℃and the thickness of the shell was 87.5 nm,the thermal stability,storage stability and centrifugal stability of DDNC ink reached 81.6%,96.6%and 80.5%,respectively.The P(MMA-co-BA)shell with high glass transition temperature avoided film forming during the filtration process,thus reducing plugging of PVDF filter membrane pores.However,the particle size of the DDNC demonstrated a remarkably increase when the P(MMA-co-BA)shell became sufficiently thick,resulting in the reduction of filtration flow rate.DDNC ink showed a better filtration performance with a high flow rate of 5 mL/s to penetrate through PVDF filter membrane when the glass transition temperature of the P(MMA-co-BA)shell was 67.6℃and shell thickness was 87.5 nm.Optical images of the DDNC ink inkjet printing polyester fabrics displayed a bright color and clear pattern while C.I.Disperse Purple 93 ink failed to penetate properly,indicating that DDNC ink has good ink-jet performance and the P(MMA-co-BA)shell on the surface of the disperse dye could effectively improve the ink-jet performance without affecting color brightness.SEM shows a thin film formed on the surface of the printed polyester fabrics due to the P(MMA-co-BA)shell of the DDNC,which is conducive to improving the color fastness of the printed fabric.The rubbing and washing fastness of the printed fabrics reached grade 5.Conclusion The glass transition temperature and thickness of P(MMA-co-BA)shell can be controlled by adjusting the proportion and amount of comonomers,and the stability of the ink can be improved by increasing the glass transition temperature of the shell and adopting reasonable sbell thickness.When the glass transition temperature of P(MMA-co-BA)shell is 67.6℃and the thickness of the shell is 87.5 nm,the thermal stability,storage stability and centrifugal stability of DDNC ink can reach 81.6%,96.6%and 80.5%,respectively.The DDNC ink shows a better filtration performance with a high flow rate of 5 mL/s to penetrate through PVDF filter membrane.The fastness of printed fabrics can reach grade 5 with a soft hand feeling.This study offers an effective approach to improve the ink-jet performance of disperse dyes,with good application prospects in inkjet printing.

disperse dyeinkjet inkink-jet printingnanocapsulecore-shell structurestability

关玉、张恒玮、付政、付少海

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江南大学 江苏省纺织品数字喷墨印花工程技术研究中心,江苏 无锡 214122

分散染料 喷墨墨水 喷墨印花 纳米胶囊 核壳结构 稳定性

2024

纺织学报
中国纺织工程学会

纺织学报

CSTPCD北大核心
影响因子:0.699
ISSN:0253-9721
年,卷(期):2024.45(11)