CN109081938A - 一种纤维素气凝胶的制备方法及其应用 - Google Patents
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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
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。
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Cited By (3)
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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 |
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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Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
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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