CN114438787B - 一种织物用防尘、疏水、保色微孔涂料及其制备方法 - Google Patents
一种织物用防尘、疏水、保色微孔涂料及其制备方法 Download PDFInfo
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Abstract
本发明公开了一种织物用防尘、疏水、保色微孔涂料及其制备方法,依次包括下列步骤:(1)在水中加入分散剂、消泡剂和润湿剂并混合均匀,在搅拌状态下加入纳米氧化锆、纳米二氧化硅和电气石粉,获得浆体;(2)对步骤(1)获得的浆体进行超声分散;(3)向步骤(2)处理后的浆体中加入硅烷偶联剂和有机硅疏水剂,在回流加热状态下搅拌,充分反应;(4)加入有机硅树脂乳液和增稠剂,搅拌均匀,得到织物用防尘、疏水、保色微孔涂料。本发明获得的涂料既可以直接喷涂在织物上,也可以将织物浸涂于稀释后的涂料液后甩干,再将织物晾干,具有非常好的润湿性、附着力以及机械强度,透气,耐皂洗,防尘效率大于90%。
Description
技术领域
本发明涉及一种涂料,具体涉及一种用于织物表面处理的涂料,为织物提供防尘、疏水的透气涂层。
背景技术
纺织品是人们日常生活中接触得最多的产品之一,在“衣食住行”中独占一席。因为接触的频率高,时间长,因此而产生的烦恼也接连不断。例如雨天出行,常会发生裤子和鞋子被打湿的情形,严重影响舒适感;衣物不小心被汤汁、饮料等污染,清洗时费时费力,还常有洗不干净的情形;新买的裤子虽然洗了好多遍,但是还在掉色等等。
为了解决上述问题,需要对织物进行疏水和保色处理。现有技术中,这些处理通常在织物的整理工艺中进行,通过将织物以纺织整理剂进行浸轧、泡沫整理等手段处理后,制得疏水并耐皂洗的织物。其中,保色效果较易达成,处理后的织物经过一定次数的水洗后,仍能有较好的保色性;但是,织物的疏水性则受到洗涤的影响较大,几次洗涤后,润湿时间大幅缩短,接触角显著降低。同时,这种后整理处理对设备、工艺条件要求高,只能用于处理织物,而不适用于对服装鞋帽等成品的处理。
另一种方案是在织物表面喷一层疏水剂,虽然也可以在较短的时间内使织物具有一定的疏水性,但是无法在织物表面形成微米-纳米级的粗糙结构,无法将疏水剂的效果充分发挥,此外,疏水层与织物附着力弱,简单的擦拭等外力作用就会将涂层破坏,并且不耐水洗。
此外,当疫情、空气污染或其它突发状况来临时,由于产能调整及产品调配需要一定的反应时间,往往会有一个阶段,口罩和防护服等防护用品供不应求,造成社会自我保护的不便。而在这种情况下,关于如何自制相对有效的应急用防尘服、口罩等,尚缺少便捷可行的方案。
因此,如果能够提供具有防尘、疏水、保色性能的微孔涂料,使得使用者可以对成品织物直接通过喷涂、浸泡等方式进行表面处理,获得良好的疏水防尘、保色效果,同时又能保留透气性,则将能够有效解决上述问题。
发明内容
本发明的发明目的是提供一种织物用防尘、疏水、保色微孔涂料,使经涂覆后的织物表面保持透气性的同时,实现防尘、防水效果,本发明的另一发明目的是提供这种涂料的制备方法。
为达到上述发明目的,本发明采用的技术方案是:一种织物用防尘、疏水、保色微孔涂料的制备方法,依次包括下列步骤:
(1) 在水中加入分散剂、消泡剂和润湿剂并混合均匀,在搅拌状态下加入纳米氧化锆、纳米二氧化硅和电气石粉,获得浆体;
(2) 对步骤(1)获得的浆体进行超声分散;
(3) 向步骤(2)处理后的浆体中加入硅烷偶联剂和有机硅疏水剂,在回流加热状态下搅拌,充分反应;
(4) 加入有机硅树脂乳液和增稠剂,搅拌均匀,得到织物用防尘、疏水、保色微孔涂料。
获得的织物用防尘、疏水、保色微孔涂料,可以直接喷涂在织物上,也可以将织物浸泡于稀释后的涂料液,充分润湿后甩干,再将织物晾干即可。因此,该涂料可以用于成品服装、口罩、围巾等。试验表明,干燥后在织物表面能形成一层具有纳米-微米结构的牢固疏水膜,膜的接触角大于150°,滚动角达20°,具有非常好的润湿性、附着力以及机械强度,在7~10次皂洗后仍然有140°以上的接触角,50次皂洗后原本褪色的织物仍然不褪色。此外,纳米氧化锆和纳米氧化硅反应使得涂膜在微观下呈微孔结构,孔径在多处于50~200nm之间,在隔绝污染物微粒的同时,还可以保留透气性。
上述技术方案中,加入的原料按质量百分比为,有机硅树脂乳液 20~40%、纳米氧化锆 5~15%、纳米二氧化硅5~15%,电气石粉3~12%、硅烷偶联剂 0.5~2%、有机硅疏水剂0.5~8%、分散剂0.1~2%,消泡剂0.1~2%、润湿剂0.1~0.3%、增稠剂0.1~2%,余量为水。
进一步的技术方案,在步骤(4)中,与增稠剂一起加入成膜助剂,成膜助剂的质量百分比为1~2%。
优选的技术方案,所述有机硅树脂乳液为硅丙乳液,硅丙乳液的固含量为30-55%,粒径小于500nm,最低成膜温度小于32℃。
上述技术方案中,所述纳米氧化锆平均粒径小于70nm,有效含量大于99%;所述纳米二氧化硅的平均粒径小于25nm,固含量为25~40%;所述电气石粉应至少为1250目。
纳米氧化锆和纳米氧化硅具有可缓慢反应生成微孔硅酸盐结构的活性,在织物表面成膜,形成微孔涂层并具有透气性。
所述润湿剂的HLB值为6~13,表面张力小于40mN/m。
所述硅烷偶联剂含2个水解基团,2个非水解基团,杂质含量优选0.5%以下。
所述有机硅疏水剂活性物含量大于30%。
优选的技术方案,步骤(1)中,搅拌时的转速为1200~1500转/分,搅拌时间为45~60分钟;步骤(2)中,超声分散时间为30~40分钟;步骤(3)中,回流时的加热温度为45~55℃,回流反应时间为90~120分钟。
由于上述技术方案运用,本发明与现有技术相比具有下列优点:
1、本发明获得的涂料既可以直接喷涂在织物上,也可以将织物浸涂于稀释后的涂料液后甩干,再将织物晾干,干燥后在织物表面能形成一层具有纳米-微米结构的牢固疏水膜,膜的接触角大于150°,滚动角达20°,该涂料具有非常好的润湿性、附着力以及机械强度,在7~10次皂洗后仍然有140°以上的接触角,50次皂洗后原本褪色的织物仍然不褪色,手感滑爽,涂层极薄,对织物的色泽影响可以忽略,富含50~200nm的微孔,可保证阻拦污染物颗粒的同时保留织物的透气性。
2、本发明获得的涂料涂覆于手帕、毛巾等棉质织物上,成膜形成筛状的微孔涂层,涂层最大孔径小于200nm。由于涂膜内部形成长效电场,对织物的孔隙要求以及涂覆要求都有所降低,即便在较大孔隙的织物上涂覆,或涂膜有轻微外观瑕疵,亦可以顺利俘获细小的颗粒物,达到GB/T32610-2016标准规定的Ⅲ级以上的过滤效率,而涂覆于衣裤上其防尘效率大于90%,因而也可以用于制备应急用的日常防护型口罩和防尘服。
3、本发明使用的原材料均不含甲醛、有害芳香胺、丙烯腈、重金属、有机锡、AOX和杀虫剂,安全友好。
具体实施方式
下面结合实施例对本发明作进一步描述:
实施例1:采用下列步骤进行制备:
表1-1 配方表
材料名称 | 用量 | 厂家 | 型号 |
去离子水 | 40 | - | - |
分散剂 | 0.3 | 高泰 | P30 |
消泡剂 | 0.2 | 巴斯夫 | MO NXZ AC |
润湿剂 | 0.1 | 陶氏 | EF-106 |
纳米氧化锆 | 5 | 晶瑞新材料 | VK-R30 |
电气石粉 | 3 | 石家庄托玛琳矿产品 | 8000目 |
纳米氧化硅 | 7 | 宇达化工 | GS-40 |
硅烷偶联剂 | 0.5 | 南京能德新材料 | 3-缩水甘油醚氧基丙基甲基二甲氧基硅烷 |
有机硅疏水剂 | 2 | 迪高 | Phobe 1505 |
硅丙乳液 | 40 | 巴德富 | RS-2520D |
增稠剂 | 0.3 | 巴斯夫 | HS 1152 |
成膜助剂 | 1.6 | 伊士曼 | TEXANOL |
S1. 在反应釜中加入40重量份的去离子水,0.3重量份的 P30分散剂和0.2重量份的MO NXZ AC消泡剂和0.1重量份的EF-106润湿剂,其中润湿剂的HLB值为11.6,表面张力为30mN/m,混合均匀后加入5重量份的纳米氧化锆,其中纳米氧化锆的平均粒径为30nm,7重量份的纳米二氧化硅,其中纳米二氧化硅的平均粒径为19nm,固含量为40%,3重量份的8000目电气石粉,在1500转/分的转速下高速分散60分钟。
S2. 将S1分散得到的浆体转移至超声分散设备分散40分钟。
S3. 将S2中得到的浆体转移至反应釜,加入0.5重量份的硅烷偶联剂(3-缩水甘油醚氧基丙基甲基二甲氧基硅烷),2重量份的Phobe 1505有机硅疏水剂,其活性物含量为为85%,保持45-50℃,400转/分的转速下反应120分钟。
S4. 向S3中得到的新浆体中加入40重量份的RS-2520D硅丙乳液,其固含量为32%,粒径小于100nm,最低成膜温度为28℃,再加入0.3质量分的HS 1152增稠剂,1.6重量份的TEXANOL成膜助剂,搅拌均匀后得到织物用防尘、疏水和保色微孔涂料。
将该实施例获得的织物用保色微孔涂料以空气喷涂方式按照0.06-0.08kg/m2的涂布量对聚丙烯腈织物进行喷涂,在25±2℃,相对湿度50±2%的环境下干燥48小时,经测试,接触角为153°,滚动角为17°,取样测得织物表面最大孔径为为164nm。按照G/T 3291-2008所述方法进行皂洗测试8次后,接触角为142°,滚动角为23°。
实施例2:
表2-1 配方表
材料名称 | 用量 | 厂家 | 型号 |
去离子水 | 32.2 | - | - |
分散剂 | 0.6 | 高泰 | 123K |
消泡剂 | 0.2 | 巴斯夫 | MO 2134 AC |
润湿剂 | 0.3 | 陶氏 | BD-109 |
纳米氧化锆 | 15 | 晶瑞新材料 | VK-R50 |
电气石粉 | 4 | 托玛琳矿产品 | 6000目 |
纳米氧化硅 | 13 | 宇达化工 | LS-30 |
硅烷偶联剂 | 1.5 | 南京硅创新材料 | (3,3,3-三氟丙基)甲基二甲氧基硅烷 |
有机硅疏水剂 | 6 | 迪高 | Phobe 1401 |
硅丙乳液 | 25 | 巴德富 | RS-996KD |
增稠剂 | 0.2 | 巴斯夫 | HS 1152 |
成膜助剂 | 2.0 | 伊士曼 | OE300 |
S1. 在反应釜中加入32.2重量份的去离子水,0.6重量份的123K分散剂和0.2重量份的MO 2134AC消泡剂和0.3重量份的BD-109润湿剂,其中润湿剂的HLB值为12.5,表面张力为31mN/m,混合均匀后加入15重量份的纳米氧化锆,其中纳米氧化锆的平均粒径为50nm,有效含量为99.9%,13重量份的纳米二氧化硅,其中纳米二氧化硅的平均粒径为15nm,固含量为30%,4重量份的6000目电气石粉,在1300转/分的转速下高速分散60分钟。
S2. 将S1分散得到的浆体转移至超声分散设备分散30分钟。
S3. 将S2中得到的浆体转移至反应釜,加入1.5重量份的硅烷偶联剂[(3,3,3-三氟丙基)甲基二甲氧基硅烷],6重量份的Phobe 1401有机硅疏水剂,其活性物含量为50%,保持45-50℃,400转/分的转速下反应90分钟。
S4. 向S3中得到的新浆体中加入25重量份的RS-996KD硅丙乳液,其固含量为49%,平均粒径为100~200nm,最低成膜温度为22℃,再加入0.2质量分的HS 1152增稠剂,2.0重量份的OE300成膜助剂,搅拌均匀后得到织物用防尘、疏水和保色微孔涂料。
将该实施例所得的涂料与水按照1:3的比例稀释后,将纯棉织物在稀释后的涂料中浸泡5分钟,取出织物在1400转/分的转速下保持120秒甩干,在25±2℃,相对湿度50±2%的环境下干燥48小时,其接触角为159°,滚动角为16°,取样测得织物的最大孔径为84nm,按照G/T 3291-2008所述方法进行皂洗测试10次后,接触角为145°,滚动角为21°。
将该实施例所得的涂料按上述方法处理后的衣服裤子穿上后收紧袖口、领口和腰部可以作为应急用防尘服使用,防尘效率满足GB17956-2000中A类防尘服的标准要求。
实施例3:
表3-1 配方表
材料名称 | 用量 | 厂家 | 型号 |
去离子水 | 24.4 | - | - |
分散剂 | 0.5 | 陶氏 | OROTAN 963 |
消泡剂 | 0.2 | 巴斯夫 | ST 2410 AC |
润湿剂 | 0.2 | 陶氏 | LF-45 |
纳米氧化锆 | 10 | 晶瑞新材料 | VK-R50 |
电气石粉 | 12 | 托玛琳矿产品 | 3000目 |
纳米氧化硅 | 15 | 宇达化工 | GS-30 |
硅烷偶联剂 | 1.0 | 江西晨光新材料 | 正丙基甲基二甲氧基硅烷 |
有机硅疏水剂 | 5 | 迪高 | Phobe 1500N |
硅丙乳液 | 30 | 保立佳 | BLJ-KD96 |
增稠剂 | 0.2 | 陶氏 | TT615 |
成膜助剂 | 1.5 | 生兴行化学 | LOCA TS |
S1. 在反应釜中加入24.4重量份的去离子水,0.5重量份的OROTAN 963分散剂,0.2重量份的ST 2410 AC消泡剂和0.2重量份的LF-45润湿剂,其中润湿剂的HLB值为12.5,表面张力为32mN/m,混合均匀后加入10重量份的纳米氧化锆,其中纳米氧化锆的平均粒径为50nm,有效含量为99.9%,15重量份的纳米二氧化硅,其中纳米二氧化硅的平均粒径为15nm,固含量为30%,12重量份的3000目电气石粉,在1500转/分的转速下高速分散45分钟。
S2. 将S1分散得到的浆体转移至超声分散设备分散40分钟。
S3. 将S2中得到的浆体转移至反应釜,加入1.0重量份的硅烷偶联剂(正丙基甲基二甲氧基硅烷),5重量份的Phobe 1500N有机硅疏水剂,其活性物含量为50%,保持50-55℃,400转/分的转速下反应105分钟。
S4. 向S3中得到的新浆体中加入30重量份的BLJ-KD96硅丙乳液,其固含量为47%,粒径为100-300nm,最低成膜温度为22℃,再加入0.2质量分的TT615增稠剂,1.5重量份的LOCA TS成膜助剂,搅拌均匀后得到织物用防尘、疏水和保色微孔涂料。
将该实施中的涂料以0.04-0.06kg/m2的涂布量喷涂于干燥的毛巾、手帕等棉质织物表面,以吹风机吹干或自然干燥24h,做成口罩样式,就可作为日常防护型口罩使用。以符合GB/T22864-2009标准中一等品技术指标的割绒毛巾为测试材料,将该实施例中的涂料分别按照0.05kg/m2的涂布量对毛巾正反两面进行喷涂,在25±2℃、相对湿度50±%的环境下干燥后作为外侧,以孔径测定仪测得喷涂面的最大孔径为91nm。再叠置一层相同材质未处理的毛巾作为内侧,制作成口罩样式,可满足GB/T32610-2016标准规定的A级防护效果和Ⅱ级过滤效率,而未经处理的双层毛巾则无法满足Ⅲ级过滤效率要求,防护等级低于D级。
将上述实施例中经涂覆处理后的织物分别按照GB18401-2010和GB/T22282-2008规定的方法进行测试,其甲醛、可分解致癌芳香胺、丙烯腈、重金属、有机锡、AOX和杀虫剂与涂覆处理前的织物相比,均未出现数值的增长,并且涂料本身无异味。
Claims (9)
1.一种织物用防尘、疏水、保色微孔涂料的制备方法,其特征在于,依次包括下列步骤:
(1) 在水中加入分散剂、消泡剂和润湿剂并混合均匀,在搅拌状态下加入纳米氧化锆、纳米二氧化硅和电气石粉,获得浆体;
(2) 对步骤(1)获得的浆体进行超声分散;
(3) 向步骤(2)处理后的浆体中加入硅烷偶联剂和有机硅疏水剂,在回流加热状态下搅拌,充分反应;
(4) 加入有机硅树脂乳液和增稠剂,搅拌均匀,得到织物用防尘、疏水、保色微孔涂料;
其中,加入的原料按质量百分比为,有机硅树脂乳液 20~40%、纳米氧化锆 5~15%、纳米二氧化硅5~15%、电气石粉3~12%、硅烷偶联剂 0.5~2%、有机硅疏水剂0.5~8%、分散剂0.1~2%,消泡剂0.1~2%、润湿剂0.1~0.3%、增稠剂0.1~2%,余量为水。
2.根据权利要求1所述的织物用防尘、疏水、保色微孔涂料的制备方法,其特征在于:在步骤(4)中,与增稠剂一起加入成膜助剂,成膜助剂的质量百分比为1~2%。
3.根据权利要求1所述的织物用防尘、疏水、保色微孔涂料的制备方法,其特征在于:所述有机硅树脂乳液为硅丙乳液,硅丙乳液的固含量为30-55%,粒径小于500nm,最低成膜温度小于32℃。
4.根据权利要求1所述的织物用防尘、疏水、保色微孔涂料的制备方法,其特征在于:所述纳米氧化锆平均粒径小于70nm;所述纳米二氧化硅平均粒径小于25nm,固含量为25~40%;所述电气石粉至少为1250目。
5.根据权利要求1所述的织物用防尘、疏水、保色微孔涂料的制备方法,其特征在于:所述润湿剂的HLB值为6~13,表面张力小于40mN/m。
6.根据权利要求1所述的织物用防尘、疏水、保色微孔涂料的制备方法,其特征在于:所述硅烷偶联剂含2个水解基团,2个非水解基团。
7.根据权利要求1所述的织物用防尘、疏水、保色微孔涂料的制备方法,其特征在于:所述有机硅疏水剂的活性物含量应大于30%。
8.根据权利要求1所述的织物用防尘、疏水、保色微孔涂料的制备方法,其特征在于:步骤(1)中,搅拌时的转速为1200~1500转/分,搅拌时间为45~60分钟;步骤(2)中,超声分散时间为30~40分钟;步骤(3)中,回流时的加热温度为45~55℃,回流反应时间为90~120分钟。
9.采用权利要求1至权利要求8中任一制备方法制备获得的织物用防尘、疏水、保色微孔涂料。
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