CN110616565B - 一种尼龙66纺织物表面纳米防火涂层的制备方法 - Google Patents

一种尼龙66纺织物表面纳米防火涂层的制备方法 Download PDF

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CN110616565B
CN110616565B CN201911041605.4A CN201911041605A CN110616565B CN 110616565 B CN110616565 B CN 110616565B CN 201911041605 A CN201911041605 A CN 201911041605A CN 110616565 B CN110616565 B CN 110616565B
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李志伟
川查尔·库马·昆杜
李小红
张治军
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Abstract

本发明属于纳米涂层制备技术领域,公开一种尼龙66纺织物表面纳米防火涂层的制备方法。S1、将植酸PA、氧化石墨烯GO分散到溶剂中,然后在150~180 ℃密闭反应10~20 h,过滤、洗涤、干燥,即得GO‑PA复合物;S2、将木质素L、氧化石墨烯GO分散到溶剂中,然后在150~180 ℃密闭反应10~20 h,过滤、洗涤、干燥,即得GO‑L复合物;S3、将壳聚糖CS分散到溶剂中,形成CS分散液;S4、将GO‑PA复合物、GO‑L复合物加入步骤S3所得CS分散液中,调节pH值=3.5~4.5;S5、将尼龙66纺织物浸渍到步骤S4所得溶液中,取出尼龙66纺织物,干燥,在120~140 ℃条件下保持3~10 min,即在尼龙66纺织物表面获得纳米防火涂层。本发明利用纳米涂层技术,在PA 66纺织物的表面形成纳米防火涂层,显示出较好的阻燃性能。

Description

一种尼龙66纺织物表面纳米防火涂层的制备方法
技术领域
本发明属于纳米涂层制备技术领域,具体涉及一种尼龙66纺织物表面纳米防火涂层的制备方法。
背景技术
尼龙66合成纤维因具有优良的物理化学性能,是一种重要的纺织物原料。然而,由尼龙66纤维制备的纺织物遇火极易燃烧且产生严重的熔滴现象,限制了其应用。因此,在尼龙66纺织物表面构筑防火涂层,提高其阻燃性能是一种重要的策略。近年来,为了满足不断提升的环保要求,在尼龙66纺织物表面构筑生物质防火涂层受到了越来越多的关注。然而,为了获得较好的防火性能,通常需要较厚的涂层,从而影响纺织物的手感、色泽、力学等性能;与此同时,相应的制备过程复杂、制备时间也较长。
发明内容
为克服现有技术中存在的不足之处,本发明的目的旨在提供一种尼龙66纺织物表面纳米防火涂层的制备方法。
为实现上述目的,本发明采取的技术方案如下:
一种尼龙66纺织物表面纳米防火涂层的制备方法,包括以下步骤:
S1、将植酸PA、氧化石墨烯GO分散到溶剂中,然后在150~180 ℃密闭反应10~20 h;之后将溶液过滤,得到滤饼,洗涤、干燥后,即得GO-PA复合物;
S2、将木质素L、氧化石墨烯GO分散到溶剂中,然后在150~180 ℃密闭反应10~20h;之后将溶液过滤,得到滤饼,洗涤、干燥后,即得GO-L复合物;
S3、将壳聚糖CS分散到溶剂中,形成CS分散液;
S4、将GO-PA复合物、GO-L复合物加入步骤S3所得CS分散液中,调节pH值等于3.5~4.5;
S5、将尼龙66纺织物浸渍到步骤S4所得溶液中,之后将尼龙66纺织物取出,在60~90 ℃条件下干燥,最后在120~140 ℃条件下保持3~10 min,即在尼龙66纺织物表面获得纳米防火涂层。
较好地,步骤S1、S2和S3中,所述溶剂同为水或乙醇。
较好地,步骤S1中,植酸PA∶氧化石墨烯GO∶溶剂=(3~6) g∶(50~200) mg∶100 mL。
较好地,步骤S2中,木质素L∶氧化石墨烯GO∶溶剂=(1~5) g∶(0.25~0.5) g∶100mL。
较好地,步骤S3中,壳聚糖CS∶溶剂=(0.25~0.5) g∶100 mL。
较好地,步骤S4中,以质量比计,最终分散液中GO-PA复合物∶GO-L复合物∶壳聚糖CS=1∶(0.5~1)∶(5~16)。
较好地,步骤S4中,用酸调节溶液pH值。
较好地,所述酸为柠檬酸。
较好地,步骤S5中,浸渍时间为10~60 min,干燥时间为10~30 min。
有益效果:本发明利用纳米涂层技术,将壳聚糖(CS)、氧化石墨烯(GO)、植酸(PA)、木质素(L)相结合,在尼龙66(PA 66)纺织物的表面形成纳米防火涂层,并显示出较好的阻燃性能;除此之外,本发明提供的制备方法具有步骤简单、原料廉价易得、反应条件温、生产成本低等特点,适合大规模工业化生产。
附图说明
图1:PA66纺织物以及实施例1所得产品的扫描电子显微镜照片。
图2:PA66纺织物以及实施例1所得产品的数码照片。
具体实施方式
下面结合具体实施例对本发明的技术方案做进一步详细、清楚地描述,但本发明的保护范围并不局限于此。
实施例1
一种尼龙66纺织物表面纳米防火涂层的制备方法,包括以下步骤:
S1、将5 mL(含量70 wt.%)的植酸(PA)和50 mg的氧化石墨烯(GO)分散到100 mL水中,超声1 h,然后在150 ℃密闭反应18 h;之后将溶液过滤,得到滤饼,洗涤、干燥后,即得GO-PA复合物;
S2、将3 g木质素(L)和0.5 g的氧化石墨烯(GO)分散到100 mL水中,然后在150 ℃密闭反应18 h;之后将溶液过滤,得到滤饼,洗涤、干燥后,即得GO-PA复合物;
S3、将0.25 g壳聚糖(CS)分散到100 mL水中,形成CS溶液;
S4、将0.05 g GO-PA复合物、0.025 g GO-L复合物分散到步骤S3所得溶液中,并用柠檬酸调节pH值=4;
S5、将40 cm×20 cm×0.15 mm(长×宽×厚)的尼龙66 (PA66)纺织物浸渍到步骤S4所得溶液中,保持30 min,之后将尼龙66纺织物取出,在80 ℃条件下干燥30 min,最后在130 ℃条件下保持5 min,获得目标产品即在尼龙66纺织物表面获得纳米防火涂层。
图1是PA66纺织物以及实施例1所得产品的扫描电子显微镜(SEM)照片。图1N是不同放大倍数条件下PA66纺织物的SEM图;图1B是不同放大倍数条件下表面沉积有纳米防火涂层的PA66纺织物的SEM图;图1最右侧的标尺为同一行SEM的放大倍数。从图1可以看出:PA66纺织物再沉积防火涂层前表面比较光滑,纤维之前缝隙比较大;沉积防火涂层后表面有一些沉积物,纤维之间缝隙变窄。本结果初步证明:通过本发明,在PA66纺织物表面获得了纳米防火涂层。
图2是PA66纺织物以及实施例1所得产品的数码照片。图2N和图2B分别是PA66纺织物和表面沉积有纳米防火涂层的数码照片。从图2可以看出:含有涂层的PA66纺织物的表面色泽与涂层前PA66纺织物一致,说明制备的防火涂层具有较好的透光性,不影响PA66的色泽。
表1是PA66纺织物以及实施例1所得产品的X射线光电子能谱(XPS)数据。从表1中可以看出:纯PA66纺织物表面磷(P)含量为零,经过本发明制备后,PA66纺织物表面的P含量(原子百分比)提高到0.3 %,这主要来源于PA中的磷,进一步说明了涂层的成功制备。
Figure 861327DEST_PATH_IMAGE001
性能测试
(1)、极限氧指数LOI测试:按照ASTM D2863标准测试,样品尺寸:140 mm×50 mm×0.15 mm (长×宽×厚);
(2)、锥形量热测试:按照ISO 5660-1标准进行测试,样品尺寸:100 mm×100 mm×0.15 mm (长×宽×厚),辐射强度35 kW/m2
(3)、耐洗性能测试:按照AATC 61(2A)-1996标准进行测试,温度38±3 ℃;
(4)、拉伸性能测试:按照GB/T 3923.1-1997 测试,拉伸速度为10 cm/min,样品尺寸:25 cm×3 cm×0.15 mm (长×宽×厚)。
表2为PA66纺织物以及实施例1所得产品的涂层增量和阻燃性能测试数据(极限氧指数以及水洗前后的锥形量热数据)。从表2中可以看出:纳米防火涂层的增量为3.6±0.38wt.%,这主要是由于CS、GO-PA、GO-L在PA66纺织物表面形成了涂层,比通常的自组装等方法的增重量小,但是却能将PA66纺织物的极限氧指数从20±1提高到26.5±1,将PA66纺织物的峰值热释放速率从481±11降低到394±11(降低了大约18%),显示出较好的阻燃性能;经过5个循环水洗之后,峰值热释放速率降低率为12%,显示出较好的耐洗性能。
Figure 40635DEST_PATH_IMAGE002
表3为PA66纺织物以及实施例1所得产品的力学性能数据。从表3可以看出:两个样品的拉伸强度和断裂伸长率数值相近,说明纳米防火涂层对PA66的拉伸性能基本没有影响。
Figure 315759DEST_PATH_IMAGE003
实施例2
一种尼龙66纺织物表面纳米防火涂层的制备方法,包括以下步骤:
S1、将4 mL(含量70 wt.%)的植酸(PA)和50 mg的氧化石墨烯(GO)分散到100 mL的95 v%乙醇中,超声1 h,然后在180 ℃密闭反应10 h;之后将溶液过滤,得到滤饼,洗涤、干燥后,即得GO-PA复合物;
S2、将1.5 g木质素(L)和0.5 g的氧化石墨烯(GO)分散到100 mL的95 v%乙醇中,然后在180 ℃密闭反应20 h;之后将溶液过滤,得到滤饼,洗涤、干燥后,即得GO-PA复合物;
S3、将0.35 g壳聚糖(CS)分散到100 mL的95%乙醇中,形成CS溶液;
S4、将0.05 g GO-PA复合物、0.025 g GO-L复合物分散到步骤S3所得溶液中,并用柠檬酸调节pH值=3.5;
S5、将40 cm × 20 cm × 0.15 mm(长×宽×厚)的尼龙66 (PA66)纺织物浸渍到步骤S4所得溶液中,保持60 min,之后将尼龙66纺织物取出,在90 ℃条件下干燥30 min,最后在140 ℃条件下保持3 min,即可在尼龙66纺织物表面获得纳米防火涂层。
实施例3
一种尼龙66纺织物表面纳米防火涂层的制备方法,包括以下步骤:
S1、将7 mL(含量70 wt.%)的植酸(PA)和50 mg的氧化石墨烯(GO)分散到100 mL水中,超声1 h,然后在180℃密闭反应15 h;之后将溶液过滤,得到滤饼,洗涤、干燥后,即得GO-PA复合物;
S2、将4.5 g木质素(L)和0.5 g的氧化石墨烯(GO)分散到100 mL水中,然后在180℃密闭反应15 h;之后将溶液过滤,得到滤饼,洗涤、干燥后,即得GO-PA复合物;
S3、将0.4 g壳聚糖(CS)分散到100 mL水中,形成CS溶液;
S4、将0.025 g GO-PA复合物、0.025 g GO-L复合物分散到步骤S3所得溶液中,并用柠檬酸调节pH值=4;
S5、将40 cm × 20 cm × 0.15 mm(长×宽×厚)的尼龙66 (PA66)纺织物浸渍到步骤S4所得溶液中,保持50 min,之后将尼龙66纺织物取出,在60 ℃条件下干燥30 min,最后在120 ℃条件下保持10 min,即可在尼龙66纺织物表面获得纳米防火涂层。

Claims (9)

1.一种尼龙66纺织物表面纳米防火涂层的制备方法,其特征在于,包括以下步骤:
S1、将植酸PA、氧化石墨烯GO分散到溶剂中,然后在150~180 ℃密闭反应10~20 h;之后将溶液过滤,得到滤饼,洗涤、干燥后,即得GO-PA复合物;
S2、将木质素L、氧化石墨烯GO分散到溶剂中,然后在150~180 ℃密闭反应10~20 h;之后将溶液过滤,得到滤饼,洗涤、干燥后,即得GO-L复合物;
S3、将壳聚糖CS分散到溶剂中,形成CS分散液;
S4、将GO-PA复合物、GO-L复合物加入步骤S3所得CS分散液中,调节pH值等于3.5~4.5;
S5、将尼龙66纺织物浸渍到步骤S4所得溶液中,之后将尼龙66纺织物取出,在60~90 ℃条件下干燥,最后在120~140 ℃条件下保持3~10 min,即在尼龙66纺织物表面获得纳米防火涂层。
2.如权利要求1所述尼龙66纺织物表面纳米防火涂层的制备方法,其特征在于:步骤S1、S2和S3中,所述溶剂同为水或乙醇。
3.如权利要求1所述尼龙66纺织物表面纳米防火涂层的制备方法,其特征在于:步骤S1中,植酸PA∶氧化石墨烯GO∶溶剂=(3~6) g∶(50~200) mg∶100 mL。
4.如权利要求1所述尼龙66纺织物表面纳米防火涂层的制备方法,其特征在于:步骤S2中,木质素L∶氧化石墨烯GO∶溶剂=(1~5) g∶(0.25~0.5) g∶100 mL。
5.如权利要求1所述尼龙66纺织物表面纳米防火涂层的制备方法,其特征在于:步骤S3中,壳聚糖CS∶溶剂=(0.25~0.5) g∶100 mL。
6.如权利要求1所述尼龙66纺织物表面纳米防火涂层的制备方法,其特征在于:步骤S4中,以质量比计,最终分散液中GO-PA复合物∶GO-L复合物∶壳聚糖CS=1∶(0.5~1)∶(5~16)。
7.如权利要求1所述尼龙66纺织物表面纳米防火涂层的制备方法,其特征在于:步骤S4中,用酸调节溶液pH值。
8.如权利要求7所述尼龙66纺织物表面纳米防火涂层的制备方法,其特征在于:所述酸为柠檬酸。
9.如权利要求1所述尼龙66纺织物表面纳米防火涂层的制备方法,其特征在于:步骤S5中,浸渍时间为10~60 min,干燥时间为10~30 min。
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