CN105568672A - 芳纶表面改性方法 - Google Patents

芳纶表面改性方法 Download PDF

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CN105568672A
CN105568672A CN201610021301.1A CN201610021301A CN105568672A CN 105568672 A CN105568672 A CN 105568672A CN 201610021301 A CN201610021301 A CN 201610021301A CN 105568672 A CN105568672 A CN 105568672A
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ethanol
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陈忠仁
马少华
闫智敬
毕文超
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Ningbo University
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Abstract

本发明涉及芳纶表面改性技术领域,具体地说,涉及一种芳纶表面改性方法。其包括以下步骤:(1)采用超声波对待改性芳纶进行表面处理;(2)对经步骤(1)处理后的芳纶进行干燥;(3)将经步骤(2)处理后的芳纶置于双氧水溶液浸泡;(4)将经步骤(3)处理后的芳纶,置于溶解有带有邻羟基基团的化合物的缓冲溶液中浸泡;(5)将经步骤(4)处理后的芳纶,冲洗干净后干燥;(6)将经步骤(5)处理后的芳纶,置入由乙醇和硅烷配制的溶液中浸泡;(7)将经步骤(6)处理后的芳纶,淋洗后干燥。经本发明的方法改性后的芳纶,拉伸强度高,与橡胶复合的粘度高。

Description

芳纶表面改性方法
技术领域
本发明涉及芳纶表面改性技术领域,具体地说,涉及一种芳纶表面改性方法。
背景技术
芳纶全称为″聚对苯二甲酰对苯二胺″,英文为Aramidfiber(帝人芳纶的商品名为Twaron,杜邦公司的商品名为Kevlar),是一种新型高科技合成纤维,具有超高强度、高模量和耐高温、耐酸耐碱、重量轻等优良生能,其强度是钢丝的5~6倍,模量为钢丝或玻璃纤维的2~3倍,韧性是钢丝的2倍,而重量仅为钢丝的1/5左右,在560度的温度下,不分解,不融化。它具有良好的绝缘性和抗老化性能,具有很长的生命周期。芳纶的发现,被认为是材料界一个非常重要的历史进程。
芳纶以其高比模量、高比强度、耐疲劳等优异性能在橡胶等多个领域得到了广泛的应用。但是从芳纶的结构可知,它是刚性分子,分子对称性高,定向程度和结晶度高,因而横向分子间作用力变弱;另外,分子结构中存在大量的芳香环,不易移动,使其分子间的氢键弱,横向强度低使得在压缩及剪切力作用下容易产生断裂。因此,为了充分发挥芳纶优异的力学性能,需要对芳纶表面进行改性处理。现有技术中缺乏一种行之有效的芳纶表面改性方法。
发明内容
本发明的内容是提供一种芳纶表面改性方法,其能够克服现有技术的某种或某些缺陷。
根据本发明的芳纶表面改性方法,其包括以下步骤:
(1)采用超声波对待改性芳纶进行表面处理;
(2)对经步骤(1)处理后的芳纶进行干燥;
(3)将经步骤(2)处理后的芳纶置于双氧水溶液浸泡;
(4)将经步骤(3)处理后的芳纶,置于溶解有带有邻羟基基团的化合物的缓冲溶液中浸泡;
(5)将经步骤(4)处理后的芳纶,冲洗干净后干燥;
(6)将经步骤(5)处理后的芳纶,置入由乙醇和硅烷配制的溶液中浸泡;
(7)将经步骤(6)处理后的芳纶,淋洗后干燥。
本发明中提供的方法,能够较佳地用于对芳纶短纤改性和芳纶长纤改性。通过本发明的方法改性后的芳纶能够具备较佳的力学性能,并能够较佳地与橡胶进行良好复合。
作为优选,步骤(1)中超声介质为水或水与乙醇的混合物。
作为优选,步骤(1)中超声功率为50~2000W,处理时间为1~30分钟。
作为优选,步骤(3)中双氧水的浓度为3%~5%。
作为优选,步骤(4)中,带有邻羟基基团的化合物采用多巴胺。
作为优选,步骤(4)中,缓冲溶液为Tris缓冲液。
作为优选,步骤(4)中,保持缓冲溶液的PH值为8~9。
作为优选,步骤(4)中,保持缓冲溶液与空气接触且维持常温。
作为优选,步骤(6)中,乙醇和硅烷的配比为10∶1。
作为优选,步骤(7)中,采用乙醇或丙酮进行淋洗。
本发明中:步骤(1)中,超声功率能够为50~2000W,处理时间能够为1~30分钟,超声介质能够为水或水与乙醇的混合物,超声介质的温度能够控制在50~90℃;步骤(3)中,双氧水溶液的浓度能够为3%~5%,浸泡时间能够为3~7分钟(较佳地为5分钟);步骤(4)中,带有邻羟基基团的化合物能够采用多巴胺,缓冲溶液能够采用TRIS(三羟甲基氨基甲烷)缓冲液,缓冲液的PH值能够为8~9(较佳地为8.5),并且保持缓冲溶液为常温且接触空气,浸泡时间能够为12~24小时;步骤(6)中,乙醇和硅烷的体积配比能够为100∶10,浸泡时间能够为3~5小时(较佳地为4小时);步骤(7)中,能够采用乙醇或丙酮进行淋洗。
通过本发明的方法所获取的芳纶能够较佳地与丁腈橡胶、天然橡胶等橡胶进行复合。
对通过本发明的方法所获取的改性芳纶进行测试,得出,通过本发明方法获取的改性芳纶与橡胶进行复合时,其粘附强度比普通芳纶提高了300%~600%以上其拉伸强度提高了600%~800%以上其断裂强力提高了700%~900%以上。
具体实施方式
为进一步了解本发明的内容,结合实施例对本发明作详细描述。应当理解的是,实施例仅仅是对本发明进行解释而并非限定。
实施例1
本实施例提供了一种芳纶表面改性方法,其包括以下步骤:
(1)采用超声波对待改性芳纶进行表面处理,超声功率为50W,处理时间为30分钟,超声介质为水,超声介质的温度控制在75℃左右;
(2)对经步骤(1)处理后的芳纶进行干燥;
(3)将经步骤(2)处理后的芳纶置于双氧水溶液浸泡,双氧水的浓度为3%,浸泡时间能够为3分钟;
(4)将经步骤(3)处理后的芳纶,置于溶解有带有邻羟基基团的化合物的缓冲溶液中浸泡,带有邻羟基基团的化合物采用多巴胺,缓冲溶液为TRIS(三羟甲基氨基甲烷)缓冲液,保持缓冲溶液的PH值为8,保持缓冲溶液与空气接触且维持常温,浸泡时间能够为12小时;
(5)将经步骤(4)处理后的芳纶,冲洗干净后干燥;
(6)将经步骤(5)处理后的芳纶,置入由乙醇和硅烷配制的溶液中浸泡,乙醇和硅烷的配比为10∶1,浸泡时间为3小时;
(7)将经步骤(6)处理后的芳纶,淋洗后干燥,采用乙醇进行淋洗。
通过本实施例的方法获取的改性芳纶在与橡胶进行复合时,其粘附强度比普通芳纶提高了500%以上,其拉伸强度提高了700%以上,其断裂强力提高了800%以上。
实施例2
本实施例也提供了一种芳纶表面改性方法,其与实施例1的不同之处在于:步骤(1)中,超声功率为2000W,处理时间为1分钟,超声介质为水与乙醇的混合物,超声介质的温度控制在90℃左右;步骤(3)中,双氧水的浓度为5%,浸泡时间能够为7分钟;步骤(4)中,带有邻羟基基团的化合物采用邻羟基苯乙酮,保持缓冲溶液的PH值为9,保持缓冲溶液与空气接触且维持常温,浸泡时间能够为24小时;步骤(6)中,乙醇和硅烷的配比为8∶1,浸泡时间为5小时;步骤(7)中,采用丙酮进行淋洗。
通过本实施例的方法获取的改性芳纶在与橡胶进行复合时,其粘附强度比普通芳纶提高了600%以上,其拉伸强度提高了800%以上,其断裂强力提高了900%以上。
实施例3
本实施例也提供了一种芳纶表面改性方法,其与实施例1的不同之处在于:步骤(1)中,超声功率为1000W,处理时间为15分钟,超声介质为70%的乙醇溶液,超声介质的温度控制在50~90℃之间;步骤(3)中,双氧水的浓度为45%,浸泡时间为5分钟;步骤(4)中,带有邻羟基基团的化合物采用邻羟基苯甲酸苯酯,保持缓冲溶液的PH值为8.5,保持缓冲溶液与空气接触且维持常温,浸泡时间能够为20小时;步骤(6)中,乙醇和硅烷的配比为12∶1,浸泡时间为4小时;步骤(7)中,采用乙醇和丙酮的混合液进行淋洗。
通过本实施例的方法获取的改性芳纶在与橡胶进行复合时,其粘附强度比普通芳纶提高了600%以上,其拉伸强度提高了800%以上,其断裂强力提高了900%以上。
以上示意性地对本发明及其实施方式进行了描述,该描述没有限制性。所以,如果本领域的普通技术人员受其启示,在不脱离本发明创造宗旨的情况下,不经创造性地设计出与该技术方案相似的方案及实施例,均应属于本发明的保护范围。

Claims (10)

1.芳纶表面改性方法,其包括以下步骤:
(1)采用超声波对待改性芳纶进行表面处理;
(2)对经步骤(1)处理后的芳纶进行干燥;
(3)将经步骤(2)处理后的芳纶置于双氧水溶液浸泡;
(4)将经步骤(3)处理后的芳纶,置于溶解有带有邻羟基基团的化合物的缓冲溶液中浸泡;
(5)将经步骤(4)处理后的芳纶,冲洗干净后干燥;
(6)将经步骤(5)处理后的芳纶,置入由乙醇和硅烷配制的溶液中浸泡;
(7)将经步骤(6)处理后的芳纶,淋洗后干燥。
2.根据权利要求1所述的方法,其特征在于:步骤(1)中超声介质为水或水与乙醇的混合物。
3.根据权利要求1或2所述的方法,其特征在于:步骤(1)中超声功率为50~2000W,处理时间为1~30分钟。
4.根据权利要求1或3所述的方法,其特征在于:步骤(3)中双氧水的浓度为3%~5%。
5.根据权利要求1所述的方法,其特征在于:步骤(4)中,带有邻羟基基团的化合物采用多巴胺。
6.根据权利要求1或5所述的方法,其特征在于:步骤(4)中,缓冲溶液为Tris缓冲液。
7.根据权利要求6所述的方法,其特征在于:步骤(4)中,保持缓冲溶液的PH值为8~9。
8.根据权利要求7所述的方法,其特征在于:步骤(4)中,保持缓冲溶液与空气接触且维持常温。
9.根据权利要求1~8中任一所述的方法,其特征在于:步骤(6)中,乙醇和硅烷的配比为10∶1。
10.根据权利要求9所述的方法,其特征在于:步骤(7)中,采用乙醇或丙酮进行淋洗。
CN201610021301.1A 2016-01-13 2016-01-13 芳纶表面改性方法 Pending CN105568672A (zh)

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CN107130429A (zh) * 2017-06-26 2017-09-05 浙江理工大学 一种在非水介质环境中的多巴胺或其衍生物在合成纤维表面快速沉积的方法
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CN107142084A (zh) * 2017-06-28 2017-09-08 滁州市三和纤维制造有限公司 一种用于摩擦材料的复合摩擦颗粒的制备方法
CN110066428A (zh) * 2019-05-24 2019-07-30 济宁齐鲁检测技术有限公司 一种改性nsf/nr复合材料及其制备方法和应用
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CN111118896A (zh) * 2019-12-30 2020-05-08 浙江华正新材料股份有限公司 一种改性芳纶和改性芳纶复合材料

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