CN114479592A - 一种新能源汽车用水性降噪涂料及其制备方法 - Google Patents
一种新能源汽车用水性降噪涂料及其制备方法 Download PDFInfo
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Abstract
本发明公开了涂料领域内的一种新能源汽车用水性降噪涂料,其由以下质量份数的原料组成:水性乳液20~50份、填料20~50份、分散剂0.2~2份、增稠剂0.2~2份、消泡剂0.1~2份、去离子水10~30份、功能性粉体15~25份;所述功能性粉体为任意比例的改性碳纤维和改性云母,改性碳纤维和改性云母均以十六烷基硅烷进行改性。其使用在新能源汽车上,可以明显的减少高频区域的噪音。
Description
技术领域
本发明涉及一种涂料,特别涉及车用水性降噪涂料的生产技术领域。
背景技术
随着人们环保意识的提升,以及国家大力发展低碳环保的引导,新能源汽车越来越受到各个主机厂的重视,市场上新能源汽车的比例逐年快速的增大,特别是的电动汽车更是新能源汽车发展的最主要方向。
相对传统的燃油汽车,采用燃油发动机提供动力,它的噪音来源主要为发动机噪音和外部噪音(如行驶过程中的风燥,发动机的噪音等),其中噪音的频率为主要在低频区域。新能源的电动汽车取消了发动机,而采用电池系统提供动力,所以消除了发动机引起的噪音,主要的噪音来源为外部噪音和电机设备发出的噪音;其噪音的频率主要集中在高频区域。
目前大家对新能源电池汽车的降噪研究,主要集中在车身结构的优化、各种零部件的安装方式及其结构优化等方面,而对其通过降噪涂料来达到降噪效果没有太多的研究,大多直接采用传统燃油汽车的降噪涂料用于新能源汽车车身上。而目前传统燃油汽车使用的降噪涂料,主要是针对低频区域噪音的消除,明显不适用于新能源电动汽车高频噪音的消除。目前,没有一种专为新能源电动汽车开发的水性降噪涂料。
发明内容
本发明目的是提出一种新能源汽车用水性降噪的涂料,其使用在新能源汽车上,可以明显的减少高频区域的噪音。
本发明的技术方案如下:
一种新能源汽车用水性降噪的涂料,由以下质量份数的原料组成:水性乳液20~50份、填料20~50份、、分散剂0 .2~2份、增稠剂0 .2~2份、消泡剂0 .1~2份、去离子水10~30份、功能性粉体15~25份。
所述水性乳液为纯丙乳液、苯丙乳液、醋酸乙烯的一种或几种。该水性乳液提供了材料良好的附着力。
所述填料为碳酸钙、滑石粉、硫酸钡、高岭土、硅灰石、钛白粉、碳黑中的至少任意一种。通过各种填料比例的调节,得到不同密度的产品。
所述分散剂为丙烯酸盐类分散剂。通过选用烯酸盐类分散剂,可以保证填料被稳定的包分散,得到内部均匀一致的涂料。
所述增稠剂为无机增稠剂、聚丙烯酸酯、聚氨酯增稠剂中的至少任意一种。通过选用不同种类的增稠剂及其不同比例的搭配,调节产品的粘度,保证合适的施工性能。
所述消泡剂为有机硅类消泡剂、丙烯酸类消泡剂中的至少任意一种。通过选用不同种类的消泡剂及其用量,可以消除产品内部的气泡,得到漆膜表面和内部都为紧实的产品。
所述功能性粉体为改性碳纤维和改性云母的一种或两者。通过该功能性粉体的增加,可以明显的减少高频区域的噪音;该功能性粉体主要分为两类:改性的碳纤维和改性的云母。
碳纤维具有高强度高模量的特性,该特性可以明显改善涂料的刚性,减少高频区的噪音。但碳纤维的粒径较小,很难均匀的溶于水性涂料中,同时添加量也相对较小;而通过对其表面进行有机处理,明显改善了碳纤维在水中的分散效果,同时可以大大提高其在涂料中的添加量。碳纤维表面处理的有机物质为十六烷基硅烷,采用的处理工艺为干法改性,具体的改性工艺如下所示:
将碳纤维放置于流化床反应器中,采用氮气吹送碳纤维,使其悬浮内流化床内,然后从顶部喷洒十六烷基硅烷,使其均匀的覆盖在碳纤维的表面,流化床的温度保持在120-150ºC,保温反应3-5小时,然后得到改性的碳纤维粉体。
云母为片状的结构,在涂料中起到天然的屏蔽功能,可以有效减低新能源电动车高频区域的噪音。但其吸油量较大,无法在涂料中大量的添加。通过对其表面改性,可以得到较小吸油量的云母,最终可以较大比例的添加到涂料中。云母表面处理的有机物质为十六烷基硅烷,采用的处理工艺为湿法改性,具体的改性工艺如下所示:
在搅拌釜内加入去离子水,边搅拌边加入云母,然后缓慢加入十六烷基硅烷,使其表面改性剂和云母充分混合均匀,将其温度加热至70-80 ºC,搅拌反应6-8小时;然后将粉体干燥、过筛,得到改性的云母粉体。
优选改性碳纤维的表面改性程度为2.0-4.0%,优选改性云母的表面改性程度为1.0-3.0 %。
本发明的还提出一种新能源汽车用水性降噪涂料的制备方法。其步骤为:
1)先将水性乳液、分散剂和消泡剂混合,在600~1000转/分钟的搅拌速度中加入功能性粉体,然后在20-30ºC温度范围内搅拌1-3小时;
2)然后在1000-2000转/分钟的搅拌速度中加入填料,待分散均匀后再加入增稠剂和去离子水,然后过滤,取得涂料。
第一阶段在600~1000转/分钟搅拌功能性粉体的工艺最为重要,保证了功能性填料可以充分的被分散均匀,同时采用水浴夹层来控制搅拌浆料的温度在20-30ºC温度范围内;这样避免过高温度搅拌时,功能性粉体产生二次团聚,从而影响最终材料的分散效果;再通过第二阶段1000-2000转/分钟的搅拌,确保填料的分散性,并最终通过增稠剂和去离子水的调节达到合适的粘度,确保产品具有良好的施工性。
附图说明
图1为实施例1-8的降噪效果图。
具体实施方式
一、改性碳纤维的制备
碳纤维表面处理的有机物质为十六烷基硅烷,采用的处理工艺为干法改性,具体的改性工艺如下所示:
将碳纤维放置于流化床反应器中,采用氮气吹送碳纤维,使其悬浮内流化床内,然后从顶部喷洒十六烷基硅烷,使其均匀的覆盖在碳纤维的表面,流化床的温度保持在120-150ºC,保温反应3-5小时,然后得到改性的碳纤维粉体。
二、改性云母的制备
云母为片状的结构,在涂料中起到天然的屏蔽功能,可以有效减低新能源电动车高频区域的噪音。但其吸油量较大,无法在涂料中大量的添加。通过对其表面改性,可以得到较小吸油量的云母,最终可以较大比例的添加到涂料中。云母表面处理的有机物质为十六烷基硅烷,采用的处理工艺为湿法改性,具体的改性工艺如下所示:
在搅拌釜内加入去离子水,边搅拌边加入云母,然后缓慢加入十六烷基硅烷,使其表面改性剂和云母充分混合均匀,将其温度加热至70-80 ºC,搅拌反应6-8小时;然后将粉体干燥、过筛,得到改性的云母粉体。
优选改性碳纤维的表面改性程度为2.0-4.0%,优选改性云母的表面改性程度为1.0-3.0 %。
三、涂料的制备
按如下步骤进行
(1)按表1对应质量份数,先将水性乳液、分散剂和消泡剂混合,搅拌中加入功能性粉体,搅拌速度为600~1000转/分钟,分1~3小时,取得均匀的浆料1。
(2)将填料缓慢加入上述浆料1中,搅拌10~20分钟,搅拌速度1000~1500转/分钟,然后将增稠剂和去离子水缓慢加入上述混合料1中,搅拌1-20分钟,搅拌速度800~1500转/分钟,取得均匀的浆料2。
(3)将浆料2进行过滤,得到最终产品。
表1:新能源汽车用水性降噪涂料配比表 (单位:kg)
四、涂料应用及性能鉴定结果:
上述实施例1-8的获得的水性降噪涂涂装于新能源汽车金属表面,在高频区域具有优良的降噪性能,经试验,复合损耗因子如下表2所示。
表2:降噪性能表:
从表2及图1可知,在涂料中加入改性的碳纤维和改性的云母可以明显降低新能源汽车的高频噪音。其中,实施例1-8的图线基本重合在一起,传统降噪涂料的图线位于实施例1-8的图线下方,两者之间的降噪效果有明显区别。同时,从图形中可以,在高频区域降噪效果更好。
本发明并不局限于上述实施例,在本发明公开的技术方案的基础上,本领域的技术人员根据所公开的技术内容,不需要创造性的劳动就可以对其中的一些技术特征作出一些替换和变形,这些替换和变形均在本发明的保护范围内。
Claims (10)
1.一种新能源汽车用水性降噪涂料,其特征在于由以下质量份数的原料组成:水性乳液20~50份、填料20~50份、分散剂0.2~2份、增稠剂0.2~2份、消泡剂0.1~2份、去离子水10~30份、功能性粉体15~25份;所述功能性粉体为任意比例的改性碳纤维和改性云母,改性碳纤维和改性云母均以十六烷基硅烷进行改性。
2.根据权利要求1所述的新能源汽车用水性降噪涂料,其特征在于:所述水性乳液由纯丙乳液、苯丙乳液、醋酸乙烯乳液中的至少任意一种。
3.根据权利要求1所述的新能源汽车用水性降噪涂料,其特征在于:所述填料为碳酸钙、滑石粉、硫酸钡、高岭土、硅灰石、钛白粉、碳黑中的至少任意一种。
4.根据权利要求1所述的新能源汽车用水性降噪涂料,其特征在于:所述分散剂为有机丙烯酸盐类分散剂。
5.根据权利要求1所述的新能源汽车用水性降噪涂料,其特征在于:所述增稠剂为无机增稠剂、聚丙烯酸酯、聚氨酯增稠剂中的至少任意一种。
6.根据权利要求1所述的新能源汽车用水性降噪涂料,其特征在于:所述消泡剂为有机硅类消泡剂、丙烯酸类消泡剂中的至少任意一种。
7.根据权利要求1所述的新能源汽车用水性降噪涂料,其特征在于:所述改性碳纤维的改性工艺如下所示:
将碳纤维放置于流化床反应器中,采用氮气吹送碳纤维,使其悬浮内流化床内,然后从顶部喷洒十六烷基硅烷,使其均匀的覆盖在碳纤维的表面,流化床的温度保持在120-150ºC,保温反应3-5小时,然后得到改性的碳纤维粉体。
8.根据权利要求1所述的新能源汽车用水性降噪涂料,其特征在于,所述改性云母的改性工艺如下所示:
在搅拌釜内加入去离子水,边搅拌边加入云母,然后缓慢加入十六烷基硅烷,使其表面改性剂和云母充分混合均匀,将其温度加热至70-80 ºC,搅拌反应6-8小时;然后将粉体干燥、过筛,得到改性的云母粉体。
9.根据权利要求1所述的新能源汽车用水性降噪涂料,其特征在于,改性碳纤维的表面改性程度为2.0-4.0%,改性云母的表面改性程度为1.0-3.0 %。
10.权利要求1所述新能源汽车用水性降噪涂料的制备方法,其特征在于包括如下步骤:
1)先将水性乳液、分散剂和消泡剂混合,在600-1000转/分钟的搅拌速度中加入功能性粉体,然后在20-30ºC温度范围内搅拌1-3小时;
2)然后在1000-2000转/分钟的搅拌速度中加入填料,待分散均匀后再加入增稠剂和去离子水,然后过滤,取得涂料。
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