CN116215028A - 一种基于回收纤维的环保复合板及其制作工艺 - Google Patents
一种基于回收纤维的环保复合板及其制作工艺 Download PDFInfo
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Abstract
本发明涉及树脂板材技术领域,具体为一种基于回收纤维的环保复合板及其制作工艺。包括以下步骤:步骤1:制作低粘度环氧树脂;步骤2:制作改性氮化硼纳米管;制作改性六方氮化硼;步骤3:(1)将低粘度环氧树脂、改性氮化硼纳米管依次分散在乙酸乙酯中,得到预处理液;(2)将低粘度环氧树脂、高粘度环氧树脂、固化剂、改性六方氮化硼、溶剂混合均匀,得到树脂胶液;步骤4:将回收纤维布在预处理液中加压浸渍,干燥,得到预处理纤维布;步骤5:将预处理纤维布在树脂胶液中浸胶处理,干燥,得到半固化片;将多个半固化片叠配,上下表面贴合离型膜,置于钢板之间,热轧,冷却,拆卸,得到环保复合板。
Description
技术领域
本发明涉及树脂板材技术领域,具体为一种基于回收纤维的环保复合板及其制作工艺。
背景技术
环保复合板是一种由增强纤维层和树脂层压得到的板材,最常见的为环氧玻纤板材,被广泛用于电子产品的配件中。传统工艺中,环保复合板一般是以玻璃纤维布作为增强纤维,该类板材密度较重,不利于轻量化发展进程,急需寻找可替代的增强纤维层。
另一方面,近年来涤纶废丝等纺织废料在城市固体废物的占比逐渐增加,约占6%;如此庞大的废料的最终走向为填埋或焚化处理,资源浪费严重、对环境污染较大。因此,该类废料的回收利用具有重要意义。其中,再涤纶废丝是聚酯纤维生产过程中的原生废料,占废品比例的2%,由于该类废料杂质少、品质高,近两年被用于回收制作RPET(再生聚酯纤维),并以其为原料生产回收纤维布,该种纤维布由于密度小、质量轻,可作为玻璃纤维增强材料的替代产品,增加废料的高值化回收性。
但是,以回收纤维布(RPET纤维布)作为增强材料,由于其丝束较为紧密,树脂的浸润性差,与其之间存在层间断裂韧性低;另一方面,引入导热填料增强环保复合板散热性时,填料分布不均匀,树脂不能很好地包裹填料附着在布料上,增加了热阻;使得环保复合板导热系数低降低、力学性能下降。
综上,解决上述问题,制作一种基于回收纤维的环保复合板具有重要价值。
发明内容
本发明的目的在于提供一种基于回收纤维的环保复合板及其制作工艺,以解决上述背景技术中提出的问题。
为了解决上述技术问题,本发明提供如下技术方案:
一种基于回收纤维的环保复合板的制作工艺,包括以下步骤:
步骤1:(1)将间苯二酚二缩水甘油醚与3-丁烯酸反应,得到乙烯基单体;(2)将乙烯基单体、1-硫代甘油、催化剂依次加入至溶剂中,升温至65~75℃反应2~4小时;加入环氧氯丙烷,升温至85~95℃,滴加饱和氢氧化钠溶液,反应4~6小时,纯化,得到低粘度环氧树脂;
步骤2:使用3-氨丙基三甲氧基硅烷偶联剂改性氮化硼纳米管,得到改性氮化硼纳米管;使用苯甲酸改性六方氮化硼,得到改性六方氮化硼;
其中,改性氮化硼纳米管包括以下原料:按重量份数计,10份氮化硼纳米管、1.75~2.5份3-氨丙基三甲氧基硅烷偶联剂、200~300份去离子水;所述改性六方氮化硼包括以下原料:按重量份数计,10份六方氮化硼,5~8份苯甲酸、250~300份乙醇。
步骤3:(1)将低粘度环氧树脂、改性氮化硼纳米管依次分散在乙酸乙酯中,得到预处理液;(2)将低粘度环氧树脂、高粘度环氧树脂、固化剂、改性六方氮化硼、溶剂混合均匀,得到树脂胶液;
步骤4:将回收纤维布在预处理液中加压浸渍,干燥,得到预处理纤维布;
步骤5:将预处理纤维布在树脂胶液中浸胶处理,干燥,得到半固化片;将多个半固化片叠配,上下表面贴合离型膜,置于钢板之间,热轧,冷却,拆卸,得到环保复合板。
较为优化地,回收纤维布由100%RPET纤维通过针刺法制得;针刺密度为50~80次/cm2,厚度为0.6~1mm。
较为优化地,步骤1的(1)中,乙烯基单体的具体制作过程为:将间苯二酚二缩水甘油醚、三乙胺加入至反应器中,升温至70~80℃,加入4-甲氧基苯酚,滴加3-丁烯酸,升温至110~120℃,反应4~6小时,得到乙烯基单体;其中,间苯二酚二缩水甘油醚与3-丁烯酸的质量比为(1.2~1.3):1。
较为优化地,步骤1的(2)中,低粘度环氧树脂包括以下原料:按重量份数计,50份乙烯基单体、35~37份1-硫代甘油、27~29份环氧氯丙烷、0.5~1份催化剂、500~520份溶剂、25~30份饱和氢氧化钠溶液。
较为优化地,步骤3中,所述预处理液包括以下原料:按重量份数计,100份低粘度环氧树脂、10~20份改性纳米填料、880~890份乙酸乙酯。
较为优化地,步骤3中,所述树脂胶液包括以下原料:按重量份数计,15~20份低粘度树脂、80~85份高粘度环氧树脂、30~35份固化剂、10~20份改性六方氮化硼、8~12份溶剂。
较为优化地,所述固化剂为质量比为(1~1.5):2的聚醚胺D400和4,4-二氨基二苯基甲烷。
较为优化地,步骤3的(2)中,将1/2量的改性六方氮化硼分散在N,N-二甲基乙酰胺中,依次加入4-二甲基氨基吡啶、N,N-二环己基碳二亚胺、聚醚胺D400混合均匀,升温至90~95℃反应24小时,过滤洗涤干燥,得到原料A;
将低粘度环氧树脂、高粘度环氧树脂、4,4-二氨基二苯基甲烷、原料A、剩余1/2量的改性六方氮化硼、溶剂混合均匀,得到树脂胶液。
较为优化地,步骤4中,回收纤维布与预处理液的浸渍比为1:(10~12),加压浸渍的压力为2~3Mpa,浸渍时间为2~3小时,干燥过程为:25~30℃干燥10~15分钟,70~80℃干燥5~8分钟,120~130℃干燥2~3分钟;步骤5中,树脂胶液的浸胶量为70~90g/m2;干燥过程中:80~110℃干燥1~2小时,热压过程中:压力为3~8Mpa,在140~150℃下保温2~3小时,在160~180℃下保温8~10小时。
较为优化地,一种基于回收纤维的环保复合板的制作工艺制作得到的环保复合板。
本技术方案中,制作了低粘度环氧树脂,将其对回收纤维布进行预处理,增加回收纤维布与树脂胶液的界面相容性,从而增强层间作用力。同时,通过在预处理液引入改性氮化硼纳米管、在树脂胶液中引入改性六方氮化硼,协同增强环保复合板的导热系数。以此,制作一种具有优异力学性能和良好散热性的轻量化的环保复合板。
(1)方案中,使用回收纤维布取代玻璃纤维布用于制作环保复合板材,更加环保经济、更加轻便,传统使用玻璃纤维布制作的环氧玻纤板的密度为1.8~2.0g/cm3,而以回收纤维布制作的环保复合板,其密度为1.2~1.3g/cm3。
(2)由于方案中使用的是回收纤维布,其孔隙率低于常见的玻璃纤维布,更难浸润,且与树脂胶液之间亲和性差。因此,一是通过选用低针刺密度的回收纤维布增加浸润性,低针刺密度的孔隙率较高。二是通过制作低粘度树脂对回收纤维布进行预处理,增加与树脂胶液的亲和性。
其中,低粘度环氧树脂是以间苯二酚二缩水甘油醚为基础单体,利用环氧基团与3-丁烯酸中的羧基反应生成酯基,得到乙烯基单体,然后乙烯基单体的碳碳双键与1-硫代甘油的巯基反应接枝,最后与环氧氯丙烷反应,制作到低粘度环氧树脂;由于密度低,具有良好的渗透性;又由于其具有苯环和酯键,其在预处理过程中,可以很好的嵌入在回收纤维布中,而含有的环氧基团与树脂胶液优异的相似相容性,可以很好的产生界面作用,从而增强了环保复合板的层间断裂韧性和力学性能。
另一方面,树脂胶液中引入了低粘度环氧树脂,由于低粘度环氧树脂增加了树脂胶液的流动性,其自由体积小于高粘度环氧树脂,增加了链的迁移性,从而可以降低脆性,增加环保复合板的韧性。
(3)管状改性氮化硼纳米管与片状改性六方氮硼,协同形成连续的导热路线,有效提高环保复合板的导热性。预处理液中,除了引入低粘度环氧树脂,还引入了氨基硅烷偶联剂改性的氮化硼纳米管,其可以在溶剂的引导下很好的浸入回收纤维布的丝束中,从而与低粘度环氧树脂交联在回收纤维布的内部和表面;而改性六方氮化硼是使用苯甲酸改性的,其可与氮化硼之间π-π堆叠,使得氮化硼表面暴露较多羧基,增加了与环氧树脂的亲和性,有效交联在树脂胶液中,从而两者形成了导热通路,降低了热阻,增强导热性。
(3)方案中,固化剂包括聚醚胺D400和4,4-二氨基二苯基甲烷,其中,聚醚胺的引入,可以增强了环氧树脂的韧性,降低了脆性,抑制了微裂纹的产生,提高了环保复合板的力学性能。进一步方案中,将聚醚胺D400预先与部分改性六方氮化硼结合(氨基与羧基脱水产生酰胺),该预处理进一步降低了改性六方氮化硼的聚集,形成了更为均匀的交联网络,提高了环保复合板的力学性能和导热性。
具体实施方式
下面将对本发明实施例中的技术方案进行清楚、完整地描述,显然,所描述的实施例仅仅是本发明一部分实施例,而不是全部的实施例。基于本发明中的实施例,本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例,都属于本发明保护的范围。
以下实施方式中,间苯二酚二缩水甘油醚的CAS号为101-90-6;3-丁烯酸的CAS号为625-38-7;环氧氯丙烷的CAS号为106-89-8;3-氨丙基三甲氧基硅烷偶联剂的CAS号为919-30-2;苯甲酸的CAS号为65-85-0;4,4-二氨基二苯基甲烷的CAS号为215590-72-0;聚醚胺D400的CAS号为9046-10-0;丙二醇单甲醚醋酸酯的CAS号为84540-57-8;均为市购。氮化硼纳米管的平均纳米管直径为80nm,比表面积为32.91m2/g,六方氮化硼的平均粒径为100nm,比表面积为39.52m2/g,材料的厂家为西安瑞禧生物科技有限公司。高粘度环氧树脂为双酚A型环氧树脂,牌号为NPEL-128,环氧当量为180~190g/eq,厂家为广州亿珲盛化工有限公司。回收纤维布由100%RPET纤维通过针刺法制得;针刺密度为80次/cm2,厚度为1mm。树脂胶液的浸胶量为80g/m2。
实施例1:一种基于回收纤维的环保复合板的制作工艺,包括以下步骤:
步骤1:(1)将12.8g间苯二酚二缩水甘油醚、0.12g三乙胺加入至反应器中,升温至75℃,加入0.01g的4-甲氧基苯酚,滴加10g的3-丁烯酸,滴加时间为1小时,升温至115℃,反应5小时,得到乙烯基单体,可等比例放大;(2)将50g乙烯基单体、36.2g1-硫代甘油、0.8g4-二甲基氨基吡啶依次加入至500g二甲基亚砜中,升温至70℃反应4小时;28g加入环氧氯丙烷,升温至80℃,滴加27g饱和氢氧化钠溶液,反应5小时,纯化,得到低粘度环氧树脂,可等比例放大;
步骤2:(1)将0.25g的3-氨丙基三甲氧基硅烷偶联剂加入至25g去离子水中,搅拌15分钟,加入1g氮化硼纳米管超声分散均匀,烘干,球磨,得到改性氮化硼纳米管,可等比例放大;(2)将0.5g苯甲酸分散在30g乙醇中,加入1g六方氮化硼超声分散均匀,将其置于60℃烘箱中加热处理2小时,过滤,80℃下干燥2小时,制得改性六方氮化硼,可等比例放大;
步骤3:(1)按照重量份数计,将100份低粘度环氧树脂、15份改性氮化硼纳米管依次搅拌分散在885份乙酸乙酯中,得到预处理液;(2)将18份低粘度环氧树脂、82份高粘度环氧树脂、34份固化剂(12份聚醚胺D400、22份4,4-二氨基二苯基甲烷)、16份改性六方氮化硼、10份丙二醇单甲醚醋酸酯混合均匀,得到树脂胶液;
步骤4:将回收纤维布置于预处理液中,浸渍比为1:10,压力为2Mpa,加压浸渍3小时,25℃干燥10分钟,80℃干燥5分钟,120℃干燥3分钟;得到预处理纤维布;
步骤5:将预处理纤维布置于树脂胶液中,在真空度为500Pa下真空灌注,在100℃干燥2小时,得到半固化片;将3个半固化片叠配,上下表面贴合离型膜,置于钢板之间,在压力为8Mpa,在150℃下保温2小时,在180℃下保温8小时,冷却,拆卸,得到环保复合板。
实施例2:一种基于回收纤维的环保复合板的制作工艺,包括以下步骤:
步骤1:(1)将12.8g间苯二酚二缩水甘油醚、0.12g三乙胺加入至反应器中,升温至75℃,加入0.01g的4-甲氧基苯酚,滴加10g的3-丁烯酸,滴加时间为1小时,升温至115℃,反应5小时,得到乙烯基单体,可等比例放大;(2)将50g乙烯基单体、35g1-硫代甘油、0.8g4-二甲基氨基吡啶依次加入至500g二甲基亚砜中,升温至70℃反应4小时;27g加入环氧氯丙烷,升温至80℃,滴加25g饱和氢氧化钠溶液,反应5小时,纯化,得到低粘度环氧树脂,可等比例放大;
步骤2:(1)将0.25g的3-氨丙基三甲氧基硅烷偶联剂加入至25g去离子水中,搅拌15分钟,加入1g氮化硼纳米管超声分散均匀,烘干,球磨,得到改性氮化硼纳米管,可等比例放大;(2)将0.5g苯甲酸分散在30g乙醇中,加入1g六方氮化硼超声分散均匀,将其置于60℃烘箱中加热处理2小时,过滤,80℃下干燥2小时,制得改性六方氮化硼,可等比例放大;
步骤3:(1)按照重量份数计,将100份低粘度环氧树脂、10份改性氮化硼纳米管依次搅拌分散在890份乙酸乙酯中,得到预处理液;(2)将15份低粘度环氧树脂、85份高粘度环氧树脂、35份固化剂(15份聚醚胺D400、20份4,4-二氨基二苯基甲烷)、10份改性六方氮化硼、10份丙二醇单甲醚醋酸酯混合均匀,得到树脂胶液;
步骤4:将回收纤维布置于预处理液中,浸渍比为1:10,压力为2Mpa,加压浸渍3小时,25℃干燥10分钟,80℃干燥5分钟,120℃干燥3分钟;得到预处理纤维布;
步骤5:将预处理纤维布置于树脂胶液中,在真空度为500Pa下真空灌注,在100℃干燥2小时,得到半固化片;将3个半固化片叠配,上下表面贴合离型膜,置于钢板之间,在压力为8Mpa,在150℃下保温2小时,在180℃下保温8小时,冷却,拆卸,得到环保复合板。
实施例3:一种基于回收纤维的环保复合板的制作工艺,包括以下步骤:
步骤1:(1)将12.8g间苯二酚二缩水甘油醚、0.12g三乙胺加入至反应器中,升温至75℃,加入0.01g的4-甲氧基苯酚,滴加10g的3-丁烯酸,滴加时间为1小时,升温至115℃,反应5小时,得到乙烯基单体,可等比例放大;(2)将50g乙烯基单体、37g1-硫代甘油、0.8g4-二甲基氨基吡啶依次加入至500g二甲基亚砜中,升温至70℃反应4小时;29g加入环氧氯丙烷,升温至80℃,30g滴加饱和氢氧化钠溶液,反应5小时,纯化,得到低粘度环氧树脂,可等比例放大;
步骤2:(1)将0.25g的3-氨丙基三甲氧基硅烷偶联剂加入至25g去离子水中,搅拌15分钟,加入1g氮化硼纳米管超声分散均匀,烘干,球磨,得到改性氮化硼纳米管,可等比例放大;(2)将0.5g苯甲酸分散在30g乙醇中,加入1g六方氮化硼超声分散均匀,将其置于60℃烘箱中加热处理2小时,过滤,80℃下干燥2小时,制得改性六方氮化硼,可等比例放大;
步骤3:(1)按照重量份数计,将100份低粘度环氧树脂、10份改性氮化硼纳米管依次搅拌分散在880份乙酸乙酯中,得到预处理液;(2)将20份低粘度环氧树脂、80份高粘度环氧树脂、30份固化剂(10份聚醚胺D400、20份4,4-二氨基二苯基甲烷)、20份改性六方氮化硼、10份丙二醇单甲醚醋酸酯混合均匀,得到树脂胶液;
步骤4:将回收纤维布置于预处理液中,浸渍比为1:10,压力为2Mpa,加压浸渍3小时,25℃干燥10分钟,80℃干燥5分钟,120℃干燥3分钟;得到预处理纤维布;
步骤5:将预处理纤维布置于树脂胶液中,在真空度为500Pa下真空灌注,在100℃干燥2小时,得到半固化片;将3个半固化片叠配,上下表面贴合离型膜,置于钢板之间,在压力为8Mpa,在150℃下保温2小时,在180℃下保温8小时,冷却,拆卸,得到环保复合板。
实施例4:一种基于回收纤维的环保复合板的制作工艺,包括以下步骤:
步骤1:(1)将12.8g间苯二酚二缩水甘油醚、0.12g三乙胺加入至反应器中,升温至75℃,加入0.01g的4-甲氧基苯酚,滴加10g的3-丁烯酸,滴加时间为1小时,升温至115℃,反应5小时,得到乙烯基单体,可等比例放大;(2)将50g乙烯基单体、36.2g1-硫代甘油、0.8g4-二甲基氨基吡啶依次加入至500g二甲基亚砜中,升温至70℃反应4小时;28g加入环氧氯丙烷,升温至80℃,滴加27g饱和氢氧化钠溶液,反应5小时,纯化,得到低粘度环氧树脂,可等比例放大;
步骤2:(1)将0.25g的3-氨丙基三甲氧基硅烷偶联剂加入至25g去离子水中,搅拌15分钟,加入1g氮化硼纳米管超声分散均匀,烘干,球磨,得到改性氮化硼纳米管,可等比例放大;(2)将0.5g苯甲酸分散在30g乙醇中,加入1g六方氮化硼超声分散均匀,将其置于60℃烘箱中加热处理2小时;过滤,80℃下干燥2小时,制得改性六方氮化硼,可等比例放大;
步骤3:(1)按照重量份数计,将100份低粘度环氧树脂、15份改性氮化硼纳米管依次搅拌分散在885份乙酸乙酯中,得到预处理液;(2)将8份改性六方氮化硼分散在100份N,N-二甲基乙酰胺中,加入0.5份4-二甲基氨基吡啶、0.5份N,N-二环己基碳二亚胺、12份聚醚胺D400混合均匀,升温至95℃反应24小时,过滤洗涤干燥,得到原料A;将18份低粘度环氧树脂、82份高粘度环氧树脂、22份4,4-二氨基二苯基甲烷、原料A、8份改性六方氮化硼、10份丙二醇单甲醚醋酸酯混合均匀,得到树脂胶液。
步骤4:将回收纤维布置于预处理液中,浸渍比为1:10,压力为2Mpa,加压浸渍3小时,25℃干燥10分钟,80℃干燥5分钟,120℃干燥3分钟;得到预处理纤维布;
步骤5:将预处理纤维布置于树脂胶液中,在真空度为500Pa下真空灌注,在100℃干燥2小时,得到半固化片;将3个半固化片叠配,上下表面贴合离型膜,置于钢板之间,在压力为8Mpa,在150℃下保温2小时,在180℃下保温8小时,冷却,拆卸,得到环保复合板。
对比例1:使用针刺密度为150次/cm2的回收纤维布,其余与实施例1相同。
对比例2:不对回收纤维布进行预处理,其余与实施例1相同。
对比例3:树脂胶液中不引入低粘度环氧树脂,其余与实施例1相同;具体更改:步骤3的(2)中,将100份高粘度环氧树脂、34份固化剂(12份聚醚胺D400、22份4,4-二氨基二苯基甲烷)、16份改性六方氮化硼、10份丙二醇单甲醚醋酸酯混合均匀,得到树脂胶液。
对比例4:改性六方氮化硼使用与改性氮化硼纳米管的方式进行改性,其余与实施例1相同;具体更改:将0.25g的3-氨丙基三甲氧基硅烷偶联剂加入至25g去离子水中,搅拌15分钟,加入1g六方氮化硼超声分散均匀,烘干,球磨,得到改性六方氮化硼。
性能测试:将实施例和对比例中制作的环保复合板进行力学性能和散热性能的测试。裁切80mm×10mm×2mm的样品,在冲击能量为5.5J下进行悬臂梁无缺口冲击强度的检测;裁切20mm×10mm×2mm的样品,采用三点弯曲试验法,使用电子万能试验机,预加载速率为2mm/min下进行检测Ⅱ型层间断裂韧性。裁切10mm×10mm×2mm的样品,室温下使用LW-9389型界面材料热阻及热传导系数仪,检测导热系数。所得数据如下所示:
实施例 | 冲击强度kJ/m2; | 层间断裂韧性J·m-2 | 导热系数W·m-1·K-1, |
实施例1 | 245 | 1873 | 1.29 |
实施例2 | 240 | 1779 | 1.25 |
实施例3 | 235 | 1753 | 1.32 |
实施例4 | 259 | 1987 | 1.34 |
对比例1 | 226 | 1705 | 1.21 |
对比例2 | 208 | 1498 | 1.05 |
对比例3 | 225 | 1723 | 1.23 |
对比例4 | 234 | 1798 | 1.20 |
由上表的数据可知:制作得到的环保复合板具有优异的抗冲击性能、层间断裂韧性和散热性。实施例4中,由于将聚醚胺预先与改性六方氮化硼复合,进一步提高了分散均匀性,形成了更为均匀的网络,增强了力学性能和导热性。对比例1~4与实施例1对比,可知:由于对比例1中,回收纤维布的针刺密度增加,使得孔隙率降低,降低了预处理液的浸润性,从而使得性能下降;对比例2中,不进行预处理,显著降低了层间作用力,使得性能有大幅度下降;对比例3中,由于未引入低粘度环氧树脂,使得抗冲击性能下降;对比例4中,由于改性六方氮化硼使用的是硅烷偶联剂改性,降低了环保复合板的导热性。
最后应说明的是:以上所述仅为本发明的优选实施例而已,并不用于限制本发明,尽管参照前述实施例对本发明进行了详细的说明,对于本领域的技术人员来说,其依然可以对前述各实施例所记载的技术方案进行修改,或者对其中部分技术特征进行等同替换。凡在本发明的精神和原则之内,所作的任何修改、等同替换、改进等,均应包含在本发明的保护范围之内。
Claims (10)
1.一种基于回收纤维的环保复合板的制作工艺,其特征在于:包括以下步骤:
步骤1:(1)将间苯二酚二缩水甘油醚与3-丁烯酸反应,得到乙烯基单体;(2)将乙烯基单体、1-硫代甘油、催化剂依次加入至溶剂中,升温至65~75℃反应2~4小时;加入环氧氯丙烷,升温至85~95℃,滴加饱和氢氧化钠溶液,反应4~6小时,纯化,得到低粘度环氧树脂;
步骤2:使用3-氨丙基三甲氧基硅烷偶联剂改性氮化硼纳米管,得到改性氮化硼纳米管;使用苯甲酸改性六方氮化硼,得到改性六方氮化硼;
步骤3:(1)将低粘度环氧树脂、改性氮化硼纳米管依次分散在乙酸乙酯中,得到预处理液;(2)将低粘度环氧树脂、高粘度环氧树脂、固化剂、改性六方氮化硼、溶剂混合均匀,得到树脂胶液;
步骤4:将回收纤维布在预处理液中加压浸渍,干燥,得到预处理纤维布;
步骤5:将预处理纤维布在树脂胶液中浸胶处理,干燥,得到半固化片;将多个半固化片叠配,上下表面贴合离型膜,置于钢板之间,热轧,冷却,拆卸,得到环保复合板。
2.根据权利要求1所述的一种基于回收纤维的环保复合板的制作工艺,其特征在于:回收纤维布由100%RPET纤维通过针刺法制得;针刺密度为50~80次/cm2,厚度为0.6~1mm。
3.根据权利要求1所述的一种基于回收纤维的环保复合板的制作工艺,其特征在于:步骤1的(1)中,乙烯基单体的具体制作过程为:将间苯二酚二缩水甘油醚、三乙胺加入至反应器中,升温至70~80℃,加入4-甲氧基苯酚,滴加3-丁烯酸,升温至110~120℃,反应4~6小时,得到乙烯基单体;其中,间苯二酚二缩水甘油醚与3-丁烯酸的质量比为(1.2~1.3):1。
4.根据权利要求1所述的一种基于回收纤维的环保复合板的制作工艺,其特征在于:步骤1的(2)中,低粘度环氧树脂包括以下原料:按重量份数计,50份乙烯基单体、35~37份1-硫代甘油、27~29份环氧氯丙烷、0.5~1份催化剂、500~520份溶剂、25~30份饱和氢氧化钠溶液。
5.根据权利要求1所述的一种基于回收纤维的环保复合板的制作工艺,其特征在于:步骤3中,所述预处理液包括以下原料:按重量份数计,100份低粘度环氧树脂、10~20份改性纳米填料、880~890份乙酸乙酯。
6.根据权利要求1所述的一种基于回收纤维的环保复合板的制作工艺,其特征在于:步骤3中,所述树脂胶液包括以下原料:按重量份数计,15~20份低粘度树脂、80~85份高粘度环氧树脂、30~35份固化剂、10~20份改性六方氮化硼、8~12份溶剂。
7.根据权利要求6所述的一种基于回收纤维的环保复合板的制作工艺,其特征在于:所述固化剂为质量比为(1~1.5):2的聚醚胺D400和4,4-二氨基二苯基甲烷。
8.根据权利要求7所述的一种基于回收纤维的环保复合板的制作工艺,其特征在于:步骤3的(2)中,将1/2量的改性六方氮化硼分散在N,N-二甲基乙酰胺中,依次加入4-二甲基氨基吡啶、N,N-二环己基碳二亚胺、聚醚胺D400混合均匀,升温至90~95℃反应24小时,过滤洗涤干燥,得到原料A;
将低粘度环氧树脂、高粘度环氧树脂、4,4-二氨基二苯基甲烷、原料A、剩余1/2量的改性六方氮化硼、溶剂混合均匀,得到树脂胶液。
9.根据权利要求1所述的一种基于回收纤维的环保复合板的制作工艺,其特征在于:步骤4中,回收纤维布与预处理液的浸渍比为1:(10~12),加压浸渍的压力为2~3Mpa,浸渍时间为2~3小时,干燥过程为:25~30℃干燥10~15分钟,70~80℃干燥5~8分钟,120~130℃干燥2~3分钟;步骤5中,树脂胶液的浸胶量为70~90g/m2;干燥过程中:80~110℃干燥1~2小时,热压过程中:压力为3~8Mpa,在140~150℃下保温2~3小时,在160~180℃下保温8~10小时。
10.根据权利要求1~9任一项所述的一种基于回收纤维的环保复合板的制作工艺制作得到的环保复合板。
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