CN111154229A - 一种阻燃的相变材料薄膜 - Google Patents
一种阻燃的相变材料薄膜 Download PDFInfo
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Abstract
本发明涉及热管理薄膜材料技术领域,具体公开了一种阻燃的相变材料薄膜,所述相变材料薄膜包含3%~50%基质、30%~80%相变微胶囊、5%~20%阻燃剂、0.1%~0.5%润湿分散剂和0.1%~1%消泡剂。本发明提供了了高效的环保无卤阻燃相变薄膜,在阻燃剂添加量小于20%的空间内,使相变复合薄膜满足阻燃V0等级。因此,改善了阻燃性能的有机相变材料应用于电子产品上会保证更加安全的应用环境。
Description
技术领域
本发明涉及热管理薄膜材料技术领域,具体涉及一种应用于电子、电器及电池的内部及其周边区域的具有阻燃功能的相变储热薄膜。
背景技术
相变材料是一种新型的储热材料,它具有储热密度高,相变过程温度恒定的特点,从而在航空航天、冷链运输、有机花卉、建筑、制冷和供暖系统、高温余热回收和太阳能发电等诸多领域都有广泛的应用。本发明针对相变材料的特殊性能,通过合理设计方案,将相变材料用于电子、电器和电池产品的内部及其周边区域,与石墨、热管、均温板、风扇和水冷板等稳态散热的方式协同,解决产品的瞬时高温及平衡温度波动对产品性能及安全的影响。
相变材料的种类繁多,按照温度点不同可以分为低温相变材料、中温相变材料和高温相变材料三个类别。按照相变材料的相变类型分为固液相变材料和固固相变材料两大类。按照相变材料的属性可以分为有机相变材料(例如石蜡类、多元醇类及多元酸等),无机类的相变材料(水合无机盐和液态金属等),共晶的相变材料(有机-有机共晶,有机-无机共晶,无机-无机共晶等)。针对各种相变材料的性质,基于电子产品的对寿命和稳定性的需求,我们选用稳定性好,循环次数多的有机类固液或者固固类的相变材料作为原材料制作相变薄膜。有机类的相变材料虽然稳定性好,寿命长,但是用在电子、电器和电池产品上如果过热非常容易引起燃烧现象的发生。目前已发表的专利文献中CN103146355A、CN109897610A、CN109449131A和CN105900228A使用有机相变材料做的薄膜产品均存在无法实现薄膜产品满足UL94阻燃V0的要求。
相变材料应用于电子产品上,体积晗值越高对电子产品的温度控制效果越有效。然而有机类的相变材料的晗值和密度相比于无机材料而言,在体积晗值上并无优势,在开发有机类相变复合薄膜产品时,为了提升产品性能,有机相变材料的添加量占比较大,因而需要开发高效的环保无卤阻燃体系,在阻燃剂添加量小于20%的空间内,使相变复合薄膜满足阻燃V0等级。因此,改善了阻燃性能的有机相变材料应用于电子产品上会保证更加安全的应用环境。
发明内容
本发明针对现有技术中的有机相变材料做的薄膜产品阻燃等级较低的问题,提供一种阻燃等级能到达到V0的相变材料薄膜;
该相变材料薄膜包含质量比重占5%~50%的基质、30%~80%的相变微胶囊、5%~20%的阻燃剂、0.1%~0.5%的润湿分散剂和0.1%~1%的消泡剂。
优选的,所述相变材料薄膜包含质量比重占25%~50%的基质、30%~54.5%的相变微胶囊、14%~20%的阻燃剂、0.2%~0.5%的润湿分散剂和0.1%~1%的消泡剂。
进一步地,所述基质包含聚酯树脂、EPDM树脂、丙烯酸类树脂、聚氨酯类树脂、环氧树脂、机硅类树脂、酚醛树脂和脲醛树脂中的一种或几种。
进一步地,相变微胶囊是壁材和芯材两种组成。
进一步地,所述相变微胶囊的芯材包含石蜡、脂肪酸、脂肪醇和脂肪酸酯中的一种。
进一步地,所述微胶囊的壁材包含脲醛树脂、密胺树脂、丙烯酸树脂和聚氨酯树脂等有材料中的一种,或氧化硅、氧化钛、氧化锌、氧化铝、氮化硼和氮化铝等无机材料的中的一种。
进一步地,所述阻燃剂包含氢氧化铝、氢氧化镁、氧化铝、膨胀石墨、硼酸锌、珍珠岩、蛭石、纳米氧化硅、纳米氧化钛、碳纳米管、石墨烯、多聚磷酸酯、多聚磷酸胺合笼状硅倍半氧烷中的一种或多种组分。
进一步地,所述润湿分散剂根据粉体和树脂的搭配选择对应体系的润湿分散剂。
进一步地,所述消泡剂为根据不同体系所选配的对应的消泡剂。
另一方面,本发明还提供了上述阻燃相变薄膜的制备工艺,所述制备工艺为,上述配方中各个组分按照一定的配比加入搅拌容器中,调整不同的搅拌速度和搅拌时间,直到溶液中粉体无结块,均匀分散;
将混合好的物料进入成型设备中,预热成型为薄膜样品,样品放入烘房进行进一步熟化。
与现有技术相比,本发明的有益效果;
本发明提供的相变材料薄膜在保证相变材料能够提供较高晗值的前提下,通过加入环保无卤阻燃剂,通过阻燃剂的相互搭配,阻燃剂与整体体系相互协同,获得了高效的阻燃性能。该相变材料薄膜应用于电子产品中,在电子产品发生极端异常的情况下如电池燃烧、爆炸等,优异的阻燃性能能够保证PCM薄膜不会助燃,从而避免了火势难以控制并造成更大的危险。本发明所提供的PCM薄膜材料可以与单双面胶进行贴合,并与其他膜材复合形成不同叠层的结构,根据产品需要模切成产品所需的形状。
具体实施方式
下面结合具体实施方式对本发明做进一步的说明。
实施例一:
本实施例提供了一种相变材料薄膜,其包含质量比重占25%的基质、54.5%的相变微胶囊、20%的阻燃剂、0.5%的润湿分散剂和0.1%的消泡剂。
本实施例中的基质为环氧树脂;相变微胶囊是壁材和芯材两种组成,芯材包含石蜡,壁材是密胺树脂;阻燃剂则包含质量比重占3%的氢氧化铝、15%的膨胀石墨和2%的纳米氧化硅三种组分;润湿分散剂选用BYK 9077;消泡剂选用BYK 1770。
本实施例中的阻燃相变薄膜的制备工艺如下:
将本实施例的配方中各个组分按照一定的配比加入搅拌容器中,调整不同的搅拌速度和搅拌时间,直到溶液中粉体无结块,均匀分散。检验合格后的物料进入成型设备中,预热成型为薄膜样品,样品放入烘房进行进一步熟化,进而制得本实施例中的阻燃相变薄膜。
实施例二:
本实施例提供了一种相变材料薄膜,其包含质量比重占10%的基质、83.9%的相变微胶囊、5%的阻燃剂、0.1%的润湿分散剂和1%的消泡剂。
本实施例中的基质包含丙烯酸类树脂和环氧树脂两种树脂;相变微胶囊同样是由壁材和芯材两种组成,芯材为脂肪酸,壁材则是是有机的脲醛树脂。本实施例中的阻燃剂包含石墨烯、多聚磷酸酯和笼状硅倍半氧烷,其中石墨烯的质量占比为阻燃剂部分的0.5%,多磷酸酯的占比为60%,笼状硅倍半氧烷的占比为39.5%。本实施例选用的润湿分散剂为BYK163;消泡剂则是BYK-017和BYK 1719的混合物,BYK-017和BYK 1719的质量比例为各50%。
本实施例中的阻燃相变薄膜的制备工艺如下:
将本实施例的配方中各个组分按照一定的配比加入搅拌容器中,调整不同的搅拌速度和搅拌时间,直到溶液中粉体无结块,均匀分散。检验合格后的物料进入成型设备中,预热成型为薄膜样品,样品放入烘房进行进一步熟化,进而制得本实施例中的阻燃相变薄膜。
实施例三
本实施例提供了一种相变材料薄膜,其包含质量比重占50%的基质、30%的相变微胶囊、18.8%的阻燃剂、0.2%的润湿分散剂和1%的消泡剂。
本实施例中的基质基质为EPDM树脂。相变微胶囊同样是由壁材和芯材两种组成,芯材包含脂肪醇,壁材为氧化硅。本实施例中的阻燃剂包含了质量比重占5%的氢氧化铝、5%的氢氧化镁、3.8%的氧化铝和5%的多聚磷酸胺等组分。本实施例中的润湿分散剂选用BYK-2200,消泡剂则选用BYK-070。
本实施例中的阻燃相变薄膜的制备工艺如下:
将本实施例的配方中各个组分按照一定的配比加入搅拌容器中,调整不同的搅拌速度和搅拌时间,直到溶液中粉体无结块,均匀分散。检验合格后的物料进入成型设备中,预热成型为薄膜样品,样品放入烘房进行进一步熟化,进而制得本实施例中的阻燃相变薄膜。
实施例四
本实施例提供了一种相变材料薄膜,其包含质量比重占5%的基质、80%的相变微胶囊、14%的阻燃剂、0.2%的润湿分散剂和0.8%的消泡剂。
本实施例中的基质基质为有机硅类树脂。相变微胶囊同样是由壁材和芯材两种组成,芯材为脂肪酸酯,壁材为聚氨酯树脂。本实施例中的阻燃剂包含了质量比重占3%的珍珠岩、1%的蛭石、8%的纳米氧化硅和2%的纳米氧化钛这几种成分。实施例中的润湿分散剂选用BYK-180,消泡剂则选用BYK-1790。
本实施例中的阻燃相变薄膜的制备工艺如下:
将本实施例的配方中各个组分按照一定的配比加入搅拌容器中,调整不同的搅拌速度和搅拌时间,直到溶液中粉体无结块,均匀分散。检验合格后的物料进入成型设备中,预热成型为薄膜样品,样品放入烘房进行进一步熟化,进而制得本实施例中的阻燃相变薄膜。
阻燃测试及结果
根据UL94标准,阻燃V0级的材料需要达到以下指标:
A:没有任何样品在测试火焰拿走之后,仍然有火苗燃烧超过10秒(有焰燃烧时间)。
B:对于每套5件样品,10次点燃后,带火苗的燃烧的总共时间不超过50秒。
C:没有任何样品一直烧到夹具上(包括有火苗的燃烧和发红的燃烧)。
D:没有任何样品,燃烧融化的液滴滴下点燃了下面12"处的棉花。
E:没有任何样品,在第二次移走测试火焰之后,持续发红燃烧超过30秒(无焰燃烧时间)。
本发明实施例一至四中的阻燃相变薄膜依照UL94标准所提供的测试规范进行阻燃测试后所得到测试结果中的各项指标如表1所示,其中,指标A项记录了样品在测试火焰拿走之后,仍然有火苗燃烧的最长时间,指标B项记录了10次点燃后,带火苗的燃烧的总共时间,指标C项记录了是否有样品一直烧到夹具上,指标C项记录了是否有样品一直烧到夹具上,指标D项记录了是否有样品燃烧融化的液滴滴下点燃了下面12"处的棉花,指标E项记录了是否有任何样品,在第二次移走测试火焰之后,持续发红燃烧超过30秒。
表1实施例一至四中的阻燃相变薄膜的阻燃测试结果
实施例 | 指标A | 指标B | 指标C | 指标D | 指标E |
实施例一 | 0s | 0s | 否 | 否 | 否 |
实施例二 | 0s | 15s | 否 | 否 | 否 |
实施例三 | 8s | 10s | 否 | 否 | 否 |
实施例四 | 5s | 5s | 否 | 否 | 否 |
由表1中的测试结果可以看出,本发明实施例中所提供的阻燃相变薄膜均达到阻燃V0等级,实施例一的10个样本中,无一被点燃,阻燃效果最佳,由此可见,本发明提供的相变材料薄膜在保证相变材料能够提供较高晗值的前提下,通过加入环保无卤阻燃剂,通过阻燃剂的相互搭配,阻燃剂与整体体系相互协同,获得了高效的阻燃性能。
本发明所提供的相变材料薄膜应用于电子产品中,在电子产品发生极端异常的情况下如电池燃烧、爆炸等,优异的阻燃性能能够保证相变材料薄膜不会助燃,从而避免了火势难以控制并造成更大的危险。
本发明所提供的相变材料薄膜材料可以与单双面胶进行贴合,并与其他膜材复合形成不同叠层的结构,根据产品需要模切成产品所需的形状。
Claims (10)
1.一种阻燃的相变材料薄膜,其特征在于,所述相变材料薄膜包含质量比重占5%~50%的基质、30%~80%的相变微胶囊、5%~20%的阻燃剂、0.1%~0.5%的润湿分散剂和0.1%~1%的消泡剂。
2.根据权利要求1所述的相变材料薄膜,其特征在于:所述相变材料薄膜包含质量比重占25%~50%的基质、30%~54.5%的相变微胶囊、14%~20%的阻燃剂、0.2%~0.5%的润湿分散剂和0.1%~1%的消泡剂。
3.根据权利要求1所述的相变材料薄膜,其特征在于:所述基质包含聚酯树脂、EPDM树脂、丙烯酸类树脂、聚氨酯类树脂、环氧树脂、机硅类树脂、酚醛树脂和脲醛树脂中的一种或几种。
4.根据权利要求1所述的相变材料薄膜,其特征在于:相变微胶囊是壁材和芯材两种组成。
5.根据权利要求4所述的相变材料薄膜,其特征在于,所述相变微胶囊的芯材包含石蜡、脂肪酸、脂肪醇和脂肪酸酯中的一种。
6.根据权利要求4所述的相变材料薄膜,其特征在于,所述微胶囊的壁材包含脲醛树脂、密胺树脂、丙烯酸树脂和聚氨酯树脂等有材料中的一种;
或氧化硅、氧化钛、氧化锌、氧化铝、氮化硼和氮化铝等无机材料的中的一种。
7.根据权利要求1所述的相变材料薄膜,其特征在于,所述阻燃剂包含氢氧化铝、氢氧化镁、氧化铝、膨胀石墨、硼酸锌、珍珠岩、蛭石、纳米氧化硅、纳米氧化钛、碳纳米管、石墨烯、多聚磷酸酯、多聚磷酸胺合笼状硅倍半氧烷中的一种或多种组分。
8.根据权利要求1所述的相变材料薄膜,其特征在于,所述润湿分散剂根据粉体和树脂的搭配选择对应体系的润湿分散剂。
9.根据权利要求1所述的相变材料薄膜,其特征在于,所述消泡剂为根据不同体系所选配的对应的消泡剂。
10.一种阻燃的相变材料薄膜的制备方法,其特征在于,所述制备工艺为,将权利要求1-9中任一所述的配方中的各个组分按照其配比加入搅拌容器中,调整不同的搅拌速度和搅拌时间,直到溶液中粉体无结块,均匀分散;
将物料进入成型设备中,预热成型为薄膜样品,样品放入烘房进行进一步熟化。
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CN112210096A (zh) * | 2020-09-12 | 2021-01-12 | 深圳垒石热管理技术有限公司 | 一种连续化生产高性能相变储热薄膜的方法 |
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