CN106273836B - 一种高耐候性隔热膜的制备方法 - Google Patents
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Abstract
本发明公开了一种高耐候性隔热膜的制备方法,属于隔热膜制备技术领域。本发明将制备的氮化硅晶须浆液与乙醇搅拌混合制得悬浮液,再利用正硅酸乙酯、无水乙醇和催化剂反应,制得的二氧化硅醇溶胶,并接枝甲基丙烯酸制得改性二氧化硅溶胶,将改性二氧化硅溶胶与上述悬浮液混合并加热反应,得到的反应液涂覆在清洗干燥后的玻璃板表面,反复涂覆、干燥工序,即可得高耐候性隔热膜,本发明制备工艺简单,制得的隔热膜具有优异的耐磨、耐候性及稳定性,隔热膜透光率高,隔热性能充分,对于紫外、紫外线的反射率高,不易老化,具有广泛的应用前景。
Description
技术领域
本发明公开了一种高耐候性隔热膜的制备方法,属于隔热膜制备技术领域。
背景技术
隔热膜又被称为防晒隔热膜,“防晒”是指能有效阻隔紫外线达90%以上。第三代产品运用了很多新技术,如“磁控镀膜”、“微米技术”、“纳米技术”、“航天科技”等,紫外线阻隔率提高到90~100%左右,红外线阻隔率提高到30~95%左右,胶的粘性更强,从而达到既降低膜的厚度又提高了防爆性能的效果。
汽车后市场渐渐成为“黄金产业”,而汽车防晒隔热膜市场在汽车后市场中所占的比重已经相当重了,毕竟在夏日里需要防晒隔热,需要防止紫外线的辐射对人体造成伤害,还可以有效防爆以最低限度的减少事故危害。随着私车家的增加,防晒隔热膜市场一片繁荣景象,行业渐渐发展起来。
隔热膜能有效阻挡太阳辐射的热量,防止热气进去室内,无须花钱把热气泵出。与窗帘和百叶窗不同,太阳隔热膜挡掉可能会通过窗户进入屋内高达79%的热气,换言之这相当于每100平方英尺承受阳光照射的玻璃每小时可节约12000个英国热量单位。
目前市面上的隔热膜大致可分为三种: (1)染色膜:就是一般所称的普通膜,这种隔热膜用起来就象是糊灯笼的玻璃纸,可说是一点隔热效果也没有,而且视线非常的差,因此时间一久就会慢慢褪色,而且受热后会散发异味。(2)半反光纸:这种太阳膜通常是4S店赠送用户的那种,隔热率大约20%~30%。(3)防爆隔热膜:具有双重效果,防爆隔热膜具有耐磨、半反光和防爆的功能,万一遇到碰撞,玻璃破碎时,还要以有效防止碎片飞散,不会危害到驾驶者的安全,安全性相当高,隔热率可以达到50%以上。
现有技术制备的隔热膜耐磨性及稳定性较差,容易老化脱落,且耐候性较差,对于红外线、紫外线的反射率较低,隔热膜透光率较低,隔热性不充分。
发明内容
本发明主要解决的技术问题:针对目前技术制备的隔热膜耐磨性及稳定性较差,容易老化脱落,且耐候性较差,对于红外线、紫外线的反射率较低,隔热膜透光率较低,隔热性不充分的问题,提供一种高耐候性隔热膜的制备方法,该方法将制备的氮化硅晶须浆液与乙醇搅拌混合制得悬浮液,再利用正硅酸乙酯、无水乙醇和催化剂反应,制得的二氧化硅醇溶胶,并接枝甲基丙烯酸制得改性二氧化硅溶胶,将改性二氧化硅溶胶与上述悬浮液混合并加热反应,得到的反应液涂覆在清洗干燥后的玻璃板表面,反复涂覆、干燥工序,即可得高耐候性隔热膜,本发明制备工艺简单,制得的隔热膜具有优异的耐磨、耐候性及稳定性,隔热膜透光率高,隔热性能充分,对于紫外、紫外线的反射率高,不易老化,具有广泛的应用前景。
为了解决上述技术问题,本发明所采用的技术方案是:
(1)称取20~30g氮化硅晶须,按固液比1:4与质量分数3%十二烷基苯磺酸钠溶液混合,搅拌混合30~50min后得到氮化硅晶须浆液,将氮化硅晶须浆液按体积比1:2与质量分数80%乙醇混合后在300~500r/min转速下机械搅拌1~2h,搅拌后得悬浮液,备用;
(2)依次取20.8~22.5mL正硅酸乙酯、275~285mL无水乙醇和70~80mL去离子水加入到三口烧瓶中,用质量分数10%氢氧化钠溶液调节pH为8.0后放入水浴锅中,在50~60℃温度下搅拌反应8~10h,反应后冷却至室温并出料,得到二氧化硅醇溶胶;
(3)量取100~150mL上述二氧化硅醇溶胶加入500mL三口烧瓶中,向三口烧瓶中加入0.5~0.7g甲基丙烯酰氧基丙基三甲氧基硅烷和50~60mL甲基丙烯酸,放入水浴锅中,在70~80℃温度下搅拌反应3~5h,反应结束后,得到改性二氧化硅溶胶;
(4)将上述制备得到的改性二氧化硅溶胶按体积比20:1与步骤(1)备用的悬浮液混合得混合液,将混合液加热至36~38℃,并保温搅拌反应15~20h,搅拌结束后冷却至室温,得反应液;
(5)将玻璃板分别用去离子水、无水乙醇、丙酮超声清洗5~10min后用吹风机吹干表面,将干燥的玻璃板表面均匀涂覆上述反应液,涂覆后放入烘箱中在80~100℃干燥60~80min后取出,再涂覆一层上述反应液,放入鼓风干燥箱中,在150~180℃温度下干燥1~2h后取出,并均匀涂覆一层上述反应液,放入真空干燥箱中在200~220℃温度下干燥2~4h,干燥后取出,冷却至室温后将薄膜从玻璃板下取下,最终形成厚度为0.8~1.2mm的隔热膜。
经检测,本发明制得的高耐候性隔热膜其可见光透过率在85%以上,同时具有70~80%的近红外屏蔽率,98~99%的紫外光屏蔽率,且耐温范围在-300~500℃,导热系数在0.03W/m·K以下,具有优异的隔热性能,使用寿命较普通的隔热膜长3倍以上。
本发明的有益效果是:
(1)本发明制得的高耐候性隔热膜牢固性强,隔热效果及耐磨性好,隔热膜整体性能稳定,提高了隔热膜使用寿命;
(2)本发明制得的高耐候性隔热膜耐候性及稳定性好,对于紫外、紫外线的反射率高,透光率佳高。
具体实施方式
首先称取20~30g氮化硅晶须,按固液比1:4与质量分数3%十二烷基苯磺酸钠溶液混合,搅拌混合30~50min后得到氮化硅晶须浆液,将氮化硅晶须浆液按体积比1:2与质量分数80%乙醇混合后在300~500r/min转速下机械搅拌1~2h,搅拌后得悬浮液,备用;随后依次取20.8~22.5mL正硅酸乙酯、275~285mL无水乙醇和70~80mL去离子水加入到三口烧瓶中,用质量分数10%氢氧化钠溶液调节pH为8.0后放入水浴锅中,在50~60℃温度下搅拌反应8~10h,反应后冷却至室温并出料,得到二氧化硅醇溶胶;再量取100~150mL上述二氧化硅醇溶胶加入500mL三口烧瓶中,向三口烧瓶中加入0.5~0.7g甲基丙烯酰氧基丙基三甲氧基硅烷和50~60mL甲基丙烯酸,放入水浴锅中,在70~80℃温度下搅拌反应3~5h,反应结束后,得到改性二氧化硅溶胶;再将上述制备得到的改性二氧化硅溶胶按体积比20:1与上述步骤备用的悬浮液混合得混合液,将混合液加热至36~38℃,并保温搅拌反应15~20h,搅拌结束后冷却至室温,得反应液;最后将玻璃板分别用去离子水、无水乙醇、丙酮超声清洗5~10min后用吹风机吹干表面,将干燥的玻璃板表面均匀涂覆上述反应液,涂覆后放入烘箱中在80~100℃干燥60~80min后取出,再涂覆一层上述反应液,放入鼓风干燥箱中,在150~180℃温度下干燥1~2h后取出,并均匀涂覆一层上述反应液,放入真空干燥箱中在200~220℃温度下干燥2~4h,干燥后取出,冷却至室温后将薄膜从玻璃板下取下,最终形成厚度为0.8~1.2mm的隔热膜。
实例1
首先称取20g氮化硅晶须,按固液比1:4与质量分数3%十二烷基苯磺酸钠溶液混合,搅拌混合30min后得到氮化硅晶须浆液,将氮化硅晶须浆液按体积比1:2与质量分数80%乙醇混合后在300r/min转速下机械搅拌1h,搅拌后得悬浮液,备用;随后依次取20.8mL正硅酸乙酯、275mL无水乙醇和70mL去离子水加入到三口烧瓶中,用质量分数10%氢氧化钠溶液调节pH为8.0后放入水浴锅中,在50℃温度下搅拌反应8h,反应后冷却至室温并出料,得到二氧化硅醇溶胶;再量取100mL上述二氧化硅醇溶胶加入500mL三口烧瓶中,向三口烧瓶中加入0.5g甲基丙烯酰氧基丙基三甲氧基硅烷和50mL甲基丙烯酸,放入水浴锅中,在70℃温度下搅拌反应3h,反应结束后,得到改性二氧化硅溶胶;再将上述制备得到的改性二氧化硅溶胶按体积比20:1与上述步骤备用的悬浮液混合得混合液,将混合液加热至36℃,并保温搅拌反应15h,搅拌结束后冷却至室温,得反应液;最后将玻璃板分别用去离子水、无水乙醇、丙酮超声清洗5min后用吹风机吹干表面,将干燥的玻璃板表面均匀涂覆上述反应液,涂覆后放入烘箱中在80℃干燥60min后取出,再涂覆一层上述反应液,放入鼓风干燥箱中,在150℃温度下干燥1h后取出,并均匀涂覆一层上述反应液,放入真空干燥箱中在200℃温度下干燥2h,干燥后取出,冷却至室温后将薄膜从玻璃板下取下,最终形成厚度为0.8mm的隔热膜。
经实例检测,本发明制得的高耐候性隔热膜其可见光透过率为88%,同时具有70%的近红外屏蔽率,98%的紫外光屏蔽率,且耐低温度为-300℃,导热系数为0.02W/m·K,具有优异的隔热性能,使用寿命较普通的隔热膜长3.5倍。
实例2
首先称取25g氮化硅晶须,按固液比1:4与质量分数3%十二烷基苯磺酸钠溶液混合,搅拌混合40min后得到氮化硅晶须浆液,将氮化硅晶须浆液按体积比1:2与质量分数80%乙醇混合后在400r/min转速下机械搅拌1.5h,搅拌后得悬浮液,备用;随后依次取21.7mL正硅酸乙酯、280mL无水乙醇和75mL去离子水加入到三口烧瓶中,用质量分数10%氢氧化钠溶液调节pH为8.0后放入水浴锅中,在55℃温度下搅拌反应9h,反应后冷却至室温并出料,得到二氧化硅醇溶胶;再量取125mL上述二氧化硅醇溶胶加入500mL三口烧瓶中,向三口烧瓶中加入0.6g甲基丙烯酰氧基丙基三甲氧基硅烷和55mL甲基丙烯酸,放入水浴锅中,在75℃温度下搅拌反应4h,反应结束后,得到改性二氧化硅溶胶;再将上述制备得到的改性二氧化硅溶胶按体积比20:1与上述步骤备用的悬浮液混合得混合液,将混合液加热至37℃,并保温搅拌反应18h,搅拌结束后冷却至室温,得反应液;最后将玻璃板分别用去离子水、无水乙醇、丙酮超声清洗8min后用吹风机吹干表面,将干燥的玻璃板表面均匀涂覆上述反应液,涂覆后放入烘箱中在90℃干燥70min后取出,再涂覆一层上述反应液,放入鼓风干燥箱中,在165℃温度下干燥1.5h后取出,并均匀涂覆一层上述反应液,放入真空干燥箱中在210℃温度下干燥3h,干燥后取出,冷却至室温后将薄膜从玻璃板下取下,最终形成厚度为1.0mm的隔热膜。
经实例检测,本发明制得的高耐候性隔热膜其可见光透过率为92%,同时具有75%的近红外屏蔽率,98.5%的紫外光屏蔽率,且耐热温度为100℃,导热系数为0.015W/m·K,具有优异的隔热性能,使用寿命较普通的隔热膜长4倍。
实例3
首先称取30g氮化硅晶须,按固液比1:4与质量分数3%十二烷基苯磺酸钠溶液混合,搅拌混合50min后得到氮化硅晶须浆液,将氮化硅晶须浆液按体积比1:2与质量分数80%乙醇混合后在500r/min转速下机械搅拌2h,搅拌后得悬浮液,备用;随后依次取22.5mL正硅酸乙酯、285mL无水乙醇和80mL去离子水加入到三口烧瓶中,用质量分数10%氢氧化钠溶液调节pH为8.0后放入水浴锅中,在60℃温度下搅拌反应10h,反应后冷却至室温并出料,得到二氧化硅醇溶胶;再量取150mL上述二氧化硅醇溶胶加入500mL三口烧瓶中,向三口烧瓶中加入0.7g甲基丙烯酰氧基丙基三甲氧基硅烷和60mL甲基丙烯酸,放入水浴锅中,在80℃温度下搅拌反应5h,反应结束后,得到改性二氧化硅溶胶;再将上述制备得到的改性二氧化硅溶胶按体积比20:1与上述步骤备用的悬浮液混合得混合液,将混合液加热至38℃,并保温搅拌反应20h,搅拌结束后冷却至室温,得反应液;最后将玻璃板分别用去离子水、无水乙醇、丙酮超声清洗10min后用吹风机吹干表面,将干燥的玻璃板表面均匀涂覆上述反应液,涂覆后放入烘箱中在100℃干燥80min后取出,再涂覆一层上述反应液,放入鼓风干燥箱中,在180℃温度下干燥2h后取出,并均匀涂覆一层上述反应液,放入真空干燥箱中在220℃温度下干燥4h,干燥后取出,冷却至室温后将薄膜从玻璃板下取下,最终形成厚度为1.2mm的隔热膜。
经实例检测,本发明制得的高耐候性隔热膜其可见光透过率为95%,同时具有80%的近红外屏蔽率,99%的紫外光屏蔽率,且耐高温度为500℃,导热系数为0.01W/m·K,具有优异的隔热性能,使用寿命较普通的隔热膜长4.5倍。
Claims (1)
1.一种高耐候性隔热膜的制备方法,其特征在于具体制备方法:
(1)称取20~30g氮化硅晶须,按固液比1:4与质量分数3%十二烷基苯磺酸钠溶液混合,搅拌混合30~50min后得到氮化硅晶须浆液,将氮化硅晶须浆液按体积比1:2与质量分数80%乙醇混合后在300~500r/min转速下机械搅拌1~2h,搅拌后得悬浮液,备用;
(2)依次取20.8~22.5mL正硅酸乙酯、275~285mL无水乙醇和70~80mL去离子水加入到三口烧瓶中,用质量分数10%氢氧化钠溶液调节pH为8.0后放入水浴锅中,在50~60℃温度下搅拌反应8~10h,反应后冷却至室温并出料,得到二氧化硅醇溶胶;
(3)量取100~150mL上述二氧化硅醇溶胶加入500mL三口烧瓶中,向三口烧瓶中加入0.5~0.7g甲基丙烯酰氧基丙基三甲氧基硅烷和50~60mL甲基丙烯酸,放入水浴锅中,在70~80℃温度下搅拌反应3~5h,反应结束后,得到改性二氧化硅溶胶;
(4)将上述制备得到的改性二氧化硅溶胶按体积比20:1与步骤(1)备用的悬浮液混合得混合液,将混合液加热至36~38℃,并保温搅拌反应15~20h,搅拌结束后冷却至室温,得反应液;
(5)将玻璃板分别用去离子水、无水乙醇、丙酮超声清洗5~10min后用吹风机吹干表面,将干燥的玻璃板表面均匀涂覆上述反应液,涂覆后放入烘箱中在80~100℃干燥60~80min后取出,再涂覆一层上述反应液,放入鼓风干燥箱中,在150~180℃温度下干燥1~2h后取出,并均匀涂覆一层上述反应液,放入真空干燥箱中在200~220℃温度下干燥2~4h,干燥后取出,冷却至室温后将薄膜从玻璃板下取下,最终形成厚度为0.8~1.2mm的隔热膜。
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