CN116516670A - 一种仿棉涤纶长丝及其制备方法 - Google Patents
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Abstract
本申请涉及纺织领域,具体公开了一种仿棉涤纶长丝及其制备方法。一种仿棉涤纶长丝包括如下重量份原料:改性涤纶长丝20‑30份、纤维素水凝胶10‑20份,所述改性涤纶长丝为涤纶长丝经氢氧化钠、十二烷基磺酸钠与十六烷基三甲基溴化铵的混合改性溶液改性得到的改性涤纶长丝;其制备方法为:将纤维素水凝胶与改性涤纶长丝搅拌混匀反应后,抽滤烘干得到仿棉涤纶长丝。本申请的仿棉涤纶长丝可用于制备织物,其具有良好的吸湿回潮率。
Description
技术领域
本申请涉及纺织领域,更具体地说,它涉及一种仿棉涤纶长丝及其制备方法。
背景技术
涤纶长丝以其优异的性能,自工业化以来得到了迅速的发展,涤纶长丝已成为我国最大的化学纤维品种,2015年1~12月,全国累计生产化学纤维超过3500万吨,其中涤纶长丝占比达79%,涤纶广泛应用在服装与家纺中。但是常规的涤纶长丝由于分子结构排列规整,结晶度高达40%~60%,同时大分子中缺乏极性亲水基团,在标准环境下普通涤纶长丝的回潮率仅有0.4%,使得纤维吸湿性与天然纤维相比较差,易产生静电现象,影响了其舒适性。
随着化纤纺丝技术的进步,超细旦、多组分复合、原料复配等新型纤维层出不穷,加上纳米技术的运用,功能性长丝不断被开发出来。而涤纶长丝因其工艺流程短、能耗小、易组合、性能多样,但其目前PET纤维主要存在两个问题:一是大分子缺少极性亲水基团,标准大气条件下的回潮率只有0.4%,导致普通涤纶长丝不仅吸水性和染色性差,且容易产生静电、亲肤性能不好,在一定程度上限制了它的应用;二是由于同质化竞争,导致PET纤维产能过剩,行业效益下滑,需要寻找新的市场突破点。因此,对PET纤维进行亲水、功能化改性,改善其吸湿性能并丰富纤维的品种,提高其附加值,具有重要的理论意义和实用价值。
发明内容
为了提高仿棉涤纶长丝的吸湿性能,本申请提供一种仿棉涤纶长丝及其制备方法。
第一方面,本申请提供一种仿棉涤纶长丝,采用如下的技术方案:
一种仿棉涤纶长丝,包括如下重量份原料:改性涤纶长丝20-30份、纤维素水凝胶10-20份,所述改性涤纶长丝为涤纶长丝经氢氧化钠、十二烷基磺酸钠与十六烷基三甲基溴化铵的混合改性溶液改性得到的改性涤纶长丝。
通过上述方案,纤维素水凝胶包裹在改性涤纶长丝表面,形成双层晶体吸水结构,外层纤维素水凝胶具有强吸水能力,吸水后也具有较好的保水能力,内部经过改性的涤纶长丝表面粗糙具有较多极性基团,大大提升纤维的吸湿性,外层水凝胶的存在也使纤维具有良好的保水性。
可选的,所述混合改性溶液中氢氧化钠、十二烷基磺酸钠与十六烷基三甲基溴化铵的重量份之比为0.2:1:(1-1.25)。
可选的,所述改性涤纶长丝的制备步骤如下:80-90℃下,用KPS-NaHSO3做引发剂,将涤纶长丝浸入氢氧化钠、十二烷基磺酸钠与十六烷基三甲基溴化铵的混合改性溶液中辐照处理1-1.5h,得到改性涤纶长丝。
通过采用上述技术方案,经过处理水解纤维表面的酯键,增强了纤维表面的吸水能力,使纤维表面羟基化,在纤维表面形成多种极性基团,磺酸基团、氨基、羧酸基团的存在大大提升了纤维的吸水能力,增强纤维与表面纤维素水凝胶的复配交联能力,降低表面张力增强铺展润湿性,辐照引发反应的进行,引起分子的重排从而大大提升纤维吸水能力,在纤维表面形成自由基接枝点位,提高纤维与纤维素水凝胶的结合能力。
可选的,所述纤维素水凝胶由纤维素纳米晶、交联剂、羟基纤维素与凹凸棒粉末组成,其重量份之比为1:(0.6-0.8):1:0.5。
通过采用上述技术方案,水凝胶内经化学交联形成三维网络聚合物,具有高的比表面积,凹凸棒增强水凝胶粘附力的同时大大提升水凝胶的储水能力,使得到的水凝胶结构上拥有亲水基团和内部丰富的网状孔隙,从而能吸收储存大量的水。
可选的,所述涤纶长丝的原料包括精对苯二甲酸、乙二醇与聚乙二醇,其重量份之比为1:(0.9-1.35):0.6。
通过采用上述技术方案,聚乙二醇的加入能够提高涤纶长丝与纤维素水凝胶的结合能力,纤维表面能包裹更多的水凝胶,提高纤维的吸水能力。
可选的,所述涤纶长丝的原料中还可以加入无机填料。
通过采用上述技术方案,无机粒子可以促进纤维内空洞的形成,抑制堵塞,同时引起纤维内外渗透压的变化,进一步促使水向纤维内部扩散。
可选的,所述无机填料与聚乙二醇的加入重量份之比为1:(2-2.2)。
通过采用上述技术方案,控制无机填料的加入量,保证其能发挥良好作用而不对纤维造成负面影响。
第二方面,本申请提供一种仿棉涤纶长丝及的制备方法,采用如下的技术方案:
一种仿棉涤纶长丝的制备方法,制备包括以下步骤:
(1)加入纤维素纳米晶、交联剂、羟基纤维素与凹凸棒粉末超声处理30-35min后,加入氢氧化钠调节溶液pH在7-8之间,充分反应后离心,获得纤维素水凝胶;
(2)将改性涤纶长丝与纤维素水凝胶混匀搅拌反应后,抽滤烘干后,得到仿棉涤纶长丝。
通过采用上述技术方案,在碱性条件下制得的纤维素水凝胶具有较好吸附水的能力,与纤维也具有良好的加入凹凸棒粉增强纤维素水凝胶与纤维的黏结能力,其表面基团与水凝胶中其他原料发生界面作用,超声促使各类原料的均匀分散,通过抽滤反应使纤维素水凝胶与改性涤纶长丝组装在一起,形成牢固的化学键,增强纤维素水凝胶与涤纶长丝之间的作用力,形成以纤维素水凝胶为外层、改性涤纶长丝为内层的双层强吸水结构的涤纶长丝,使制得的方面涤纶长丝具有较强的吸水保水能力。
综上所述,本申请具有以下有益效果:
1、由于本申请采用改性纤维与纤维素水凝胶,二者均具有良好的吸附水的能力,通过对纤维的进一步改性,纤维素水凝胶与涤纶长丝间发生化学键合,形成了双层晶体吸水结构效果,有效提高了仿棉涤纶长丝的吸液速度和能力。
2、本申请中优选纤维素水凝胶的组成与配比以增强纤维素水凝胶与纤维的结合力,实现对纤维进行表面处理,改善了其表面活性,有利于纤维与纤维素水凝胶的进一步结合,形成纤维表面包覆层紧密包覆在纤维表面不发生迁移,结合更稳定,涤纶长丝获得更持久稳定的吸湿性。
具体实施方式
以下结合实施例对本申请作进一步详细说明。
实施例中未注明具体条件者,按照常规条件或制造商建议的条件进行。所用试剂或仪器未注明生产厂商者,均为可以通过市售购买获得的常规产品。
选用衣康酸作交联剂,选用硫酸钙作无机填料。
涤纶长丝的制备例
制备例1
一种涤纶长丝,制备方法如下:
0.3MPa下加入10kg精对苯二甲酸、9kg乙二醇与6kg聚乙二醇混匀进行酯化反应2h,加热到260℃常压下进行缩聚1h抽真空至0.03KPa下继续缩聚反应2h,制备得到聚酯切片,将聚酯切片270℃下经异性形喷丝板,熔融纺制成涤纶长丝。
制备例2
一种涤纶长丝,制备方法如下:
0.3MPa下加入10kg精对苯二甲酸、13.5kg乙二醇与6kg聚乙二醇混匀进行酯化反应2h,加热到260℃常压下进行缩聚1h抽真空至0.03KPa下继续缩聚反应2h,制备得到聚酯切片,将聚酯切片270℃下经异性形喷丝板,熔融纺制成涤纶长丝。
制备例3
0.3MPa下加入10kg精对苯二甲酸、13.5kg乙二醇、3kg无机填料与6kg聚乙二醇混匀进行酯化反应2h,加热到260℃常压下进行缩聚1h抽真空至0.03KPa下继续缩聚反应2h,制备得到聚酯切片,将聚酯切片270℃下经异性形喷丝板,熔融纺制成涤纶长丝。
制备例4
0.3MPa下加入10kg精对苯二甲酸、13.5kg乙二醇、3kg无机填料与6kg聚乙二醇混匀进行酯化反应2h,加热到260℃常压下进行缩聚1h抽真空至0.03KPa下继续缩聚反应2h,制备得到聚酯切片,将聚酯切片270℃下经异性形喷丝板,熔融纺制成涤纶长丝。
改性涤纶长丝的制备例
制备例5
一种改性涤纶长丝,其制备方法如下:80℃下,用KPS-NaHSO3做引发剂,将20kg涤纶长丝浸入2kg氢氧化钠、10kg十二烷基磺酸钠与10kg十六烷基三甲基溴化铵的混合改性溶液中辐照处理1h,得到改性涤纶长丝,涤纶长丝选用制备例1制备的。
制备例6
一种改性涤纶长丝,其制备方法如下:85℃下,用KPS-NaHSO3做引发剂,将20kg涤纶长丝浸入2kg氢氧化钠、10kg十二烷基磺酸钠与11kg十六烷基三甲基溴化铵的混合改性溶液中辐照处理1.2h,得到改性涤纶长丝。涤纶长丝选用制备例2制备的。
制备例7
一种改性涤纶长丝,其制备方法如下:90℃下,用KPS-NaHSO3做引发剂,将20kg涤纶长丝浸入2kg氢氧化钠、10kg十二烷基磺酸钠与12.5kg十六烷基三甲基溴化铵的混合改性溶液中辐照处理1.5h,得到改性涤纶长丝。涤纶长丝选用制备例1制备的。
制备例8
一种改性涤纶长丝,其制备方法如下:90℃下,用KPS-NaHSO3做引发剂,将20kg涤纶长丝浸入2kg氢氧化钠、10kg十二烷基磺酸钠与12.5kg十六烷基三甲基溴化铵的混合改性溶液中辐照处理1.5h,得到改性涤纶长丝。涤纶长丝选用制备例3制备的。
制备例9
一种改性涤纶长丝,与制备例8不同的是,涤纶长丝选用制备例4制备的。
实施例
实施例1
一种仿棉涤纶长丝,其制备方法如下:
(1)加入10kg纤维素纳米晶、6kg交联剂、10kg羟基纤维素与5kg凹凸棒粉末超声处理30min后,加入氢氧化钠调节溶液pH为7.0,充分反应后以5000r/min,离心5min去除气泡离心,得到纤维素水凝胶;
(2)取20kg纤维素水凝胶与20kg改性涤纶长丝混匀搅拌反应30min后,用聚四氟乙烯滤膜抽滤,烘干后,得到仿棉涤纶长丝。
本实施例中选用制备例5中制备的改性涤纶长丝。
实施例2
一种仿棉涤纶长丝,与实施例1的不同之处在于,其原料为15kg纤维素水凝胶与25kg的改性涤纶长丝。
实施例3
一种仿棉涤纶长丝,与实施例1的不同之处在于,其原料为10kg纤维素水凝胶与30kg的改性涤纶长丝。
实施例4
一种仿棉涤纶长丝,与实施例2的不同之处在于,所述纤维素水凝胶由10kg纤维素纳米晶、8kg交联剂、10kg羟基纤维素与5kg凹凸棒粉末超声处理35min后,加入氢氧化钠调节溶液pH在7-8之间,充分反应后以5000r/min,离心5min去除气泡离心,得到纤维素水凝胶。
实施例5
一种仿棉涤纶长丝,与实施例4的不同之处在于,本实施例中使用制备例6制得的改性涤纶长丝。
实施例6
一种仿棉涤纶长丝,与实施例4的不同之处在于,本实施例中使用制备例7制得的改性涤纶长丝。
实施例7
一种仿棉涤纶长丝,与实施例4的不同之处在于,本实施例中使用制备例8制得的改性涤纶长丝。
实施例8
一种仿棉涤纶长丝,与实施例4的不同之处在于,本实施例中使用制备例9制得的改性涤纶长丝。
对比例
对比例1
一种仿棉涤纶长丝,与实施例1的不同之处在于,本对比例中使用未经改性的涤纶长丝,采用制备例1制得的涤纶长丝。
对比例2
一种仿棉涤纶长丝,与实施例1的不同之处在于,本对比例中使用市售普通涤纶长丝。
对比例3
一种仿棉涤纶长丝,与实施例1的不同之处在于,本对比例的仿棉涤纶纤维未加入纤维素水凝胶。
性能检测试验
检测方法/试验方法
回潮率测定:按照GB/T 6529-2008《纺织品调湿和试验用标准大气》标准执行,将仿棉涤纶长丝置于烘箱中进行烘干,待90min之后取出织物在电子天平上称取质量;然后将仿棉涤纶长丝在室温下静置20min,再在电子天平上称取织物的质量,根据吸湿前后的质量来计算织物的回潮率。
表1实验检测结果
回潮率/% | |
实施例1 | 2.98 |
实施例2 | 2.99 |
实施例3 | 2.97 |
实施例4 | 3.01 |
实施例5 | 3.02 |
实施例6 | 3.03 |
实施例7 | 3.26 |
实施例8 | 3.27 |
对比例1 | 2.01 |
对比例2 | 1.08 |
对比例3 | 1.74 |
结合实施例1-3和对比例1-2并结合表1可以看出,实施例1-3的回潮率大大高于对比例1-2,说明经本申请方法制备的改性涤纶长丝与纤维素水凝胶结合制备的涤纶长丝纤维具有较好的吸水性,回潮性较好。
结合实施例1-4与对比例3并结合表1可以看出,实施例1-4的各项实验数据均高于对比例3,说明纤维素水凝胶的加入有利于大大提升长丝的吸湿性,使制备的仿棉涤纶长丝具有良好的回潮性,实施例1-4的各项数据相差不大,使用本申请规定范围内各原料制备水凝胶能获得较好性能的涤纶长丝纤维。
结合实施例4-6与表1可以看出,使用不同比例的混合改性溶液对纤维进行改性,均能得到靠近棉线性能,吸湿、回潮性较好的涤纶长丝。
结合实施例7-8与表1可以看出,使用原料中加入无机填料制备的改性涤纶长丝,能进一步提升涤纶长丝的吸湿性能。
本具体实施例仅仅是对本申请的解释,其并不是对本申请的限制,本领域技术人员在阅读完本说明书后可以根据需要对本实施例做出没有创造性贡献的修改,但只要在本申请的权利要求范围内都受到专利法的保护。
Claims (8)
1.一种仿棉涤纶长丝,其特征在于,所述仿棉涤纶长丝包括如下重量份原料:改性涤纶长丝20-30份、纤维素水凝胶10-20份,所述改性涤纶长丝为涤纶长丝经氢氧化钠、十二烷基磺酸钠与十六烷基三甲基溴化铵的混合改性溶液改性得到的改性涤纶长丝。
2.根据权利要求1所述的一种仿棉涤纶长丝,其特征在于,所述混合改性溶液中氢氧化钠、十二烷基磺酸钠与十六烷基三甲基溴化铵的重量份之比为0.2:1:(1-1.25)。
3.根据权利要求1所述的一种仿棉涤纶长丝,其特征在于,所述改性涤纶长丝的制备步骤如下:80-90℃下,用KPS-NaHSO3做引发剂,将涤纶长丝浸入氢氧化钠、十二烷基磺酸钠与十六烷基三甲基溴化铵的混合改性溶液中辐照处理1-1.5h,得到改性涤纶长丝。
4.根据权利要求1所述的一种仿棉涤纶长丝,其特征在于:所述纤维素水凝胶由纤维素纳米晶、交联剂、羟基纤维素与凹凸棒粉末组成,其重量份之比为1:(0.6-0.8):1:0.5。
5.根据权利要求3所述的一种仿棉涤纶长丝,其特征在于:所述涤纶长丝的原料包括精对苯二甲酸、乙二醇与聚乙二醇,其重量份之比为1:(0.9-1.35):0.6。
6.根据权利要求5所述的一种仿棉涤纶长丝,其特征在于:所述涤纶长丝的原料中还可以加入无机填料。
7.根据权利要求6所述的一种仿棉涤纶长丝,其特征在于:所述无机填料与聚乙二醇的加入重量份之比为1:(2-2.2)。
8.一种如权利要求1-7任一所述仿棉涤纶长丝的制备方法,其特征在于,制备包括以下步骤:
(1)加入纤维素纳米晶、交联剂、羟基纤维素与凹凸棒粉末超声处理30-35min后,加入氢氧化钠调节溶液pH在7-8之间,充分反应后离心,获得纤维素水凝胶;
(2)将改性涤纶长丝与纤维素水凝胶混匀搅拌反应后,抽滤烘干后,得到仿棉涤纶长丝。
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