CN109081938A - 一种纤维素气凝胶的制备方法及其应用 - Google Patents

一种纤维素气凝胶的制备方法及其应用 Download PDF

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CN109081938A
CN109081938A CN201710442402.0A CN201710442402A CN109081938A CN 109081938 A CN109081938 A CN 109081938A CN 201710442402 A CN201710442402 A CN 201710442402A CN 109081938 A CN109081938 A CN 109081938A
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范佳晨
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Abstract

本申请公开了一种纤维素气凝胶的制备方法及其应用，该方法包括：(1)、将壳聚糖溶液pH调整至9～10，然后加入木聚糖酶处理20～30min；在微波中处理10～30min，然后搅拌60～120min；加入纤维素酶处理20～60min，得到微纤维浆液；纤维浆液添加羧甲基纤维素，将pH调节为6～8，搅拌混合20～60min，并在流化器中进行流化处理，得到微纤化纤维素；(2)、将微纤化纤维素和乙烯基三甲氧基硅烷混合，调节pH至4～5，搅拌20～60min；然后冷冻干燥，获得纤维素气凝胶。本发明通过对纤维素气凝胶进行硅烷化改性，使其表面具有良好的疏水性能，表面水滴的接触角可达165°，这类疏水材料可用于吸附油剂、油类等，进行油水分离。

Description

一种纤维素气凝胶的制备方法及其应用
技术领域
本申请属于医学、环保技术领域，特别是涉及一种纤维素气凝胶的制备 方法及其应用。
背景技术
纤维素气凝胶经过改性后可以具有良好的疏水性，但是现有技术手段中， 其表面接触角只能达到150°左右，限制了其在油水分离中的应用。
发明内容
本发明的目的在于提供一种纤维素气凝胶的制备方法及其应用，以克服 现有技术中的不足。
为实现上述目的，本发明提供如下技术方案：
本申请实施例公开一种纤维素气凝胶的制备方法，包括：
(1)、将壳聚糖溶液pH调整至9～10，然后加入木聚糖酶处理20～30min； 在微波中处理10～30min，然后搅拌60～120min；加入纤维素酶处理20～60min， 得到微纤维浆液；纤维浆液添加羧甲基纤维素，将pH调节为6～8，搅拌混合 20～60min，并在流化器中进行流化处理，得到微纤化纤维素；
(2)、将微纤化纤维素和乙烯基三甲氧基硅烷混合，调节pH至4～5，搅 拌20～60min；然后冷冻干燥，获得纤维素气凝胶。
优选的，在上述的纤维素气凝胶的制备方法中，所述步骤(1)中，微波 输出功率为500W。
优选的，在上述的纤维素气凝胶的制备方法中，所述步骤(1)中，纤维 素酶质量分数为0.05～0.08％。
优选的，在上述的纤维素气凝胶的制备方法中，所述步骤(1)中，每克 微纤维浆液添加50～80mg羧甲基纤维素。
优选的，在上述的纤维素气凝胶的制备方法中，所述步骤(2)中，将微 纤化纤维素和乙烯基三甲氧基硅烷按照5:(1～3)混合。
优选的，在上述的纤维素气凝胶的制备方法中，所述步骤(2)中，通过 盐酸调节pH。
本申请还公开了纤维素气凝胶在油水分离中的应用。
与现有技术相比，本发明的优点在于：本发明通过对纤维素气凝胶进行 硅烷化改性，使其表面具有良好的疏水性能，表面水滴的接触角可达165°， 这类疏水材料可用于吸附油剂、油类等，进行油水分离。
具体实施方式
本发明通过下列实施例作进一步说明：根据下述实施例，可以更好地理 解本发明。然而，本领域的技术人员容易理解，实施例所描述的具体的物料 比、工艺条件及其结果仅用于说明本发明，而不应当也不会限制权利要求书 中所详细描述的本发明。
实施例1
将壳聚糖溶液pH调整至9，然后加入木聚糖酶处理30min；在输出功率 为500w的微波中处理15min，在8000rpm的速度搅拌60min；加入质量分数 为0.05％的纤维素酶处理30min，得到微纤维浆液；每克微纤维浆液添加50mg 羧甲基纤维素，将pH调节为8，搅拌混合20min，并在流化器中进行流化处 理，得到微纤化纤维素。
将微纤化纤维素和乙烯基三甲氧基硅烷按照5:2混合，调节pH至4，搅 拌30min；然后冷冻干燥，获得纤维素气凝胶。
制得的纤维素气凝胶，密度在13mg/cm3；孔隙率在99.7％，表面水滴的 接触角在165°。
实施例2
将壳聚糖溶液pH调整至9，然后加入木聚糖酶处理30min；在输出功率 为500w的微波中处理15min，在8000rpm的速度搅拌60min；加入质量分数 为0.08％的纤维素酶处理30min，得到微纤维浆液；每克微纤维浆液添加70mg 羧甲基纤维素，将pH调节为8，搅拌混合20min，并在流化器中进行流化处 理，得到微纤化纤维素。
将微纤化纤维素和乙烯基三甲氧基硅烷按照5:3混合，调节pH至4，搅 拌30min；然后冷冻干燥，获得纤维素气凝胶。
制得的纤维素气凝胶，密度在12.6mg/cm3；孔隙率在99.4％，表面水滴 的接触角在158°。
对比例
将壳聚糖溶液pH调整至9，然后加入木聚糖酶处理30min；在输出功率 为500w的微波中处理15min，在8000rpm的速度搅拌60min；加入质量分数 为0.05％的纤维素酶处理30min，得到微纤维浆液；每克微纤维浆液添加50mg 羧甲基纤维素，将pH调节为8，搅拌混合20min，并在流化器中进行流化处 理，得到微纤化纤维素。
将微纤化纤维素悬浮液调节pH至4，搅拌30min；然后冷冻干燥，获得 纤维素气凝胶。
制得的纤维素气凝胶，密度在11mg/cm3；孔隙率在79％，表面水滴的接 触角在105°。
最后，还需要说明的是，术语“包括”、“包含”或者其任何其他变体意在涵盖 非排他性的包含，从而使得包括一系列要素的过程、方法、物品或者设备不 仅包括那些要素，而且还包括没有明确列出的其他要素，或者是还包括为这 种过程、方法、物品或者设备所固有的要素。

Claims (7)

1.一种纤维素气凝胶的制备方法，其特征在于，包括：
(1)、将壳聚糖溶液pH调整至9～10，然后加入木聚糖酶处理20～30min；在微波中处理10～30min，然后搅拌60～120min；加入纤维素酶处理20～60min，得到微纤维浆液；纤维浆液添加羧甲基纤维素，将pH调节为6～8，搅拌混合20～60min，并在流化器中进行流化处理，得到微纤化纤维素；
(2)、将微纤化纤维素和乙烯基三甲氧基硅烷混合，调节pH至4～5，搅拌20～60min；然后冷冻干燥，获得纤维素气凝胶。
2.根据权利要求1所述的纤维素气凝胶的制备方法，其特征在于：所述步骤(1)中，微波输出功率为500W。
3.根据权利要求1所述的纤维素气凝胶的制备方法，其特征在于：所述步骤(1)中，纤维素酶质量分数为0.05～0.08％。
4.根据权利要求1所述的纤维素气凝胶的制备方法，其特征在于：所述步骤(1)中，每克微纤维浆液添加50～80mg羧甲基纤维素。
5.根据权利要求1所述的纤维素气凝胶的制备方法，其特征在于：所述步骤(2)中，将微纤化纤维素和乙烯基三甲氧基硅烷按照5:(1～3)混合。
6.根据权利要求1所述的纤维素气凝胶的制备方法，其特征在于：所述步骤(2)中，通过盐酸调节pH。
7.权利要求1至6所述的纤维素气凝胶在油水分离中的应用。
CN201710442402.0A 2017-06-13 2017-06-13 一种纤维素气凝胶的制备方法及其应用 Withdrawn CN109081938A (zh)

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CN113773715A (zh) * 2021-09-24 2021-12-10 四川汇园宝新材料科技有限公司 一种气凝胶保温涂料及其制备方法

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CN109865482A (zh) * 2019-04-02 2019-06-11 江南大学 一种抗菌油水分离纳米气凝胶复合材料及其制备方法与应用
CN109865482B (zh) * 2019-04-02 2020-08-25 江南大学 一种抗菌油水分离纳米气凝胶复合材料及其制备方法与应用
CN113429617A (zh) * 2021-06-24 2021-09-24 东华大学 一种木棉纳米纤维素气凝胶及其制备方法和应用
CN113773715A (zh) * 2021-09-24 2021-12-10 四川汇园宝新材料科技有限公司 一种气凝胶保温涂料及其制备方法

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