CN106632915A - 一种阻燃凹凸棒土/聚丙烯酸纳米复合凝胶及其制备方法 - Google Patents
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Abstract
本发明公开了一种阻燃凹凸棒土/聚丙烯酸纳米复合凝胶及其制备方法,其特征在于,是由以下重量份的原料制成:聚磷酸铵2‑3,凹凸棒土5‑10,硼酸锌1‑2,盐酸溶液15‑20,硫酸锌溶液30‑40,无水乙醇适量,硅烷偶联剂KH‑570 2‑5,纳米氧化铜2‑4,硅烷偶联剂KH‑550 2‑5,壳聚糖2‑3,硝酸铈0.4‑1,丙烯酸5‑10,氮气适量,蒸馏水适量;本发明配合加入的壳聚糖富含氨基,不仅可以提供氨基接枝到凹凸棒土上,参与交联,增强其网络结构的稳定性,同时壳聚糖具有很好的吸附性,可以增加载体的载附量;通过添加聚磷酸铵和硼酸锌,使材料的阻燃抑烟效果好。
Description
技术领域
本发明涉及一种凹凸棒土载体及其制备,尤其涉及一种阻燃凹凸棒土/聚丙烯酸纳米复合凝胶及其制备方法。
背景技术
药物载体释放和靶向系统能够减少药物降解及损失,降低副作用,提高生物利用度,因而对它的研究越来越受到重视。高分子表面活性剂由于其独特的两亲性结构,可以进行自组装,形成各种形式的聚集体,如胶束、微乳液、凝胶、液晶、囊泡等。这些聚集体具有包载药物分子的能力,同时又对膜有良好的渗透性,成为药物载体的重要研究领域。凹凸棒土是一种以凹凸棒石为主要组分的,具有特殊纤维状晶体结构形态的含水富镁铝硅酸盐矿物。由于其优异的吸附性、离子交换、流变性、催化性和可塑性,而被应用于制备药物载体。
朱龙祥在其硕士学位论文《原位聚合制备凹凸棒/聚合物纳米复合材料中的凝胶现象及应用》中,利用凹凸棒土和丙烯酸制备了纳米复合水凝胶,但是其作为药物载体使用,还存在着载附量、抗菌性、缓释性欠佳的问题。
发明内容
基于以上思考,本发明旨在提供一种载附量大、抗菌性好的药物载体用纳米复合水凝胶,及其制备方法。
本发明所要解决的技术问题采用以下的技术方案来实现 :
一种阻燃凹凸棒土/聚丙烯酸纳米复合凝胶,其特征在于,是由以下重量份的原料制成:
聚磷酸铵2-3,凹凸棒土5-10,硼酸锌1-2,盐酸溶液15-20,硫酸锌溶液30-40,无水乙醇适量,硅烷偶联剂KH-570 2-5,纳米氧化铜2-4,硅烷偶联剂KH-550 2-5,壳聚糖2-3,硝酸铈0.4-1,丙烯酸5-10,氮气适量,蒸馏水适量;
所述盐酸溶液浓度为2-6mol/L;硫酸锌溶液为0.5-1mol/L。
所述的一种阻燃凹凸棒土/聚丙烯酸纳米复合凝胶及其制备方法,其特征在于,由以下步骤制成:
a. 将凹凸棒土在120-160℃下烘烤1-3h,去除其中的有机化合物后,分散于蒸馏水中,再加入盐酸溶液、硫酸锌溶液进行活化和离子交换吸附,再将聚磷酸铵和硼酸锌加入并混合搅拌 20min,使聚磷酸铵和硼酸锌进入凹凸棒土纳米孔道当中,并且表面富含硅羟基,有锌离子吸附;
b. 将步骤a所得凹凸棒纳米棒晶分散到无水乙醇中,加入硅烷偶联剂KH-570、硅烷偶联剂KH-550、壳聚糖,超声分散1-3h后,60-90℃回流20-26h,反应完成后用无水乙醇洗涤2-5次,干燥后,得到碳碳双键接枝和氨基接枝、壳聚糖接枝的凹凸棒纳米棒晶;
c. 将步骤b所得凹凸棒纳米棒晶分散到蒸馏水中,超声分散1-2h后,加入硝酸铈、纳米氧化铜、丙烯酸,氮气保护、磁力搅拌条件下,于50-80℃反应18-25h,用蒸馏水洗去未反应的丙烯酸和聚丙烯酸,即得纳米氧化铜、壳聚糖加强的凹凸棒土/聚丙烯复合凝胶。
所述的一种阻燃凹凸棒土/聚丙烯酸纳米复合凝胶及其制备方法,其特征在于,步骤b中的干燥条件为30-50℃下真空干燥20-26h。
本发明的有益效果是:用盐酸溶液和硫酸锌溶液处理凹凸棒土,使得凹凸棒土表面富含硅羟基,为下一步的接枝改性做准备,同时吸附的锌离子具有杀菌的作用,使载体能更好的应用在医疗方面;用硅烷偶联剂KH-550和KH-570改性凹凸棒土后,得到氨基和碳碳双键接枝的凹凸棒土;在硝酸铈的催化作用下,丙烯酸在凹凸棒纳米棒晶表面通过氧化还原反应引发聚合,然后与接枝氨基和碳碳双键的凹凸棒土发生交联聚合反应,形成三维网络结构的纳米复合水凝胶;同时,加入的壳聚糖富含氨基,不仅可以提供氨基接枝到凹凸棒土上,参与交联,增强其网络结构的稳定性,同时壳聚糖具有很好的吸附性,可以增加载体的载附量;通过添加聚磷酸铵和硼酸锌,使材料的阻燃抑烟效果好。
具体实施方式
下面结合实施例, 对本发明的具体实施方式作进一步描述。
实施例
一种阻燃凹凸棒土/聚丙烯酸纳米复合凝胶,其特征在于,是由以下重量份的原料制成:
聚磷酸铵3,凹凸棒土10,硼酸锌2,盐酸溶液20,硫酸锌溶液40,无水乙醇适量,硅烷偶联剂KH-570 5,纳米氧化铜4,硅烷偶联剂KH-550 5,壳聚糖3,硝酸铈1,丙烯酸10,氮气适量,蒸馏水适量;
所述盐酸溶液浓度为2-6mol/L;硫酸锌溶液为0.5-1mol/L。
所述的一种阻燃凹凸棒土/聚丙烯酸纳米复合凝胶及其制备方法,其特征在于,由以下步骤制成:
a. 将凹凸棒土在120-160℃下烘烤1-3h,去除其中的有机化合物后,分散于蒸馏水中,再加入盐酸溶液、硫酸锌溶液进行活化和离子交换吸附,再将聚磷酸铵和硼酸锌加入并混合搅拌 20min,使聚磷酸铵和硼酸锌进入凹凸棒土纳米孔道当中,并且表面富含硅羟基,有锌离子吸附;
b. 将步骤a所得凹凸棒纳米棒晶分散到无水乙醇中,加入硅烷偶联剂KH-570、硅烷偶联剂KH-550、壳聚糖,超声分散1-3h后,60-90℃回流20-26h,反应完成后用无水乙醇洗涤2-5次,干燥后,得到碳碳双键接枝和氨基接枝、壳聚糖接枝的凹凸棒纳米棒晶;
c. 将步骤b所得凹凸棒纳米棒晶分散到蒸馏水中,超声分散1-2h后,加入硝酸铈、纳米氧化铜、丙烯酸,氮气保护、磁力搅拌条件下,于50-80℃反应18-25h,用蒸馏水洗去未反应的丙烯酸和聚丙烯酸,即得纳米氧化铜、壳聚糖加强的凹凸棒土/聚丙烯复合凝胶。
所述的一种阻燃凹凸棒土/聚丙烯酸纳米复合凝胶及其制备方法,其特征在于,步骤b中的干燥条件为30-50℃下真空干燥20-26h。
本发明的技术参数为:在pH值为7.0时,对90.0mg/L的亚甲基蓝溶液的吸附量≥302.0 mg/g。
Claims (3)
1.一种阻燃凹凸棒土/聚丙烯酸纳米复合凝胶,其特征在于,是由以下重量份的原料制成:
聚磷酸铵2-3,凹凸棒土5-10,硼酸锌1-2,盐酸溶液15-20,硫酸锌溶液30-40,无水乙醇适量,硅烷偶联剂KH-570 2-5,纳米氧化铜2-4,硅烷偶联剂KH-550 2-5,壳聚糖2-3,硝酸铈0.4-1,丙烯酸5-10,氮气适量,蒸馏水适量;
所述盐酸溶液浓度为2-6mol/L;硫酸锌溶液为0.5-1mol/L。
2.根据权利要求1所述的一种阻燃凹凸棒土/聚丙烯酸纳米复合凝胶及其制备方法,其特征在于,由以下步骤制成:
a. 将凹凸棒土在120-160℃下烘烤1-3h,去除其中的有机化合物后,分散于蒸馏水中,再加入盐酸溶液、硫酸锌溶液进行活化和离子交换吸附,再将聚磷酸铵和硼酸锌加入并混合搅拌 20min,使聚磷酸铵和硼酸锌进入凹凸棒土纳米孔道当中,并且表面富含硅羟基,有锌离子吸附;
b. 将步骤a所得凹凸棒纳米棒晶分散到无水乙醇中,加入硅烷偶联剂KH-570、硅烷偶联剂KH-550、壳聚糖,超声分散1-3h后,60-90℃回流20-26h,反应完成后用无水乙醇洗涤2-5次,干燥后,得到碳碳双键接枝和氨基接枝、壳聚糖接枝的凹凸棒纳米棒晶;
c. 将步骤b所得凹凸棒纳米棒晶分散到蒸馏水中,超声分散1-2h后,加入硝酸铈、纳米氧化铜、丙烯酸,氮气保护、磁力搅拌条件下,于50-80℃反应18-25h,用蒸馏水洗去未反应的丙烯酸和聚丙烯酸,即得纳米氧化铜、壳聚糖加强的凹凸棒土/聚丙烯复合凝胶。
3.根据权利要求2所述的一种阻燃凹凸棒土/聚丙烯酸纳米复合凝胶及其制备方法,其特征在于,步骤b中的干燥条件为30-50℃下真空干燥20-26h。
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CN113024994B (zh) * | 2021-02-08 | 2021-12-10 | 厦门大学 | 一种纳米凹凸棒土/酚醛气凝胶的制备方法及其在制备耐磨汽车轮胎中的应用 |
US11597809B2 (en) | 2021-02-08 | 2023-03-07 | Xiamen University | Method for preparing nano attapulgite and phenolic aerogel and method for preparing abrasion-resistant vehicle tire |
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