CN110483662A - 一种羧甲基壳聚糖交联凝胶 - Google Patents

一种羧甲基壳聚糖交联凝胶 Download PDF

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CN110483662A
CN110483662A CN201910603956.3A CN201910603956A CN110483662A CN 110483662 A CN110483662 A CN 110483662A CN 201910603956 A CN201910603956 A CN 201910603956A CN 110483662 A CN110483662 A CN 110483662A
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acid
carboxymethyl chitosan
linked gel
chitosan cross
carboxymethyl
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莫思琦
梅金凤
李忠玉
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Changzhou University
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    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61KPREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K47/00Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additives; Targeting or modifying agents chemically bound to the active ingredient
    • A61K47/30Macromolecular organic or inorganic compounds, e.g. inorganic polyphosphates
    • A61K47/36Polysaccharides; Derivatives thereof, e.g. gums, starch, alginate, dextrin, hyaluronic acid, chitosan, inulin, agar or pectin
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61KPREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
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    • B01J20/00Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/22Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising organic material
    • B01J20/26Synthetic macromolecular compounds
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    • B01J20/00Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
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    • C08B37/00272-Acetamido-2-deoxy-beta-glucans; Derivatives thereof
    • C08B37/003Chitin, i.e. 2-acetamido-2-deoxy-(beta-1,4)-D-glucan or N-acetyl-beta-1,4-D-glucosamine; Chitosan, i.e. deacetylated product of chitin or (beta-1,4)-D-glucosamine; Derivatives thereof

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Abstract

本发明公开了一种羧甲基壳聚糖交联凝胶。采用水溶性的羧甲基壳聚糖为原料,与氨基多羧酸进行交联。本发明工艺简单,反应条件温和。所得凝胶含有大量活性基团,有利于其在吸附和药物缓释等方面的运用。

Description

一种羧甲基壳聚糖交联凝胶
技术领域
本发明属于天然高分子改性领域,具体涉及一种羧甲基壳聚糖交联凝胶。
背景技术
壳聚糖是甲壳素经化学方法处理脱乙酰基后的产物,是一种天然的阳离子聚合物,它无毒、无害、安全可靠、易生物降解,具有良好的生物相容性。自上世纪60 年代以来,对壳聚糖的研究十分活跃,尤其是近十多年来的研究更为深入和广泛,在纺织、印染、造纸、食品、医药、环保及其他领域展示了广泛的应用前景。但壳聚糖只溶于酸或酸性溶液中,大大限制了它的应用范围。对壳聚糖进行化学改性,提高其溶解性,开发更高级的新用途,这是壳聚糖研究中最为活跃的课题。在众多的的壳聚糖衍生物中,羧甲基壳聚糖的研究较早,也最令人瞩目。
羧甲基壳聚糖是壳聚糖在碱性条件下与一氯乙酸反应得到的产物,它是一种两性聚电解质,能有效与重金属离子进行络合。与壳聚糖相比,羧甲基壳聚糖具有良好的水溶性,且无毒无味、生物相容性好、可降解,这些丰富而独特的性质使得羧甲基壳聚糖成为近年来研究较多的壳聚糖衍生物之一。羧甲基壳聚糖相对于壳聚糖的优势在于,羧甲基化的壳聚糖具有良好的水溶性,且其羧基对金属离子如镉、铅、汞、砷等有极强的螯合能力。作为重金属离子的富集剂,其显示了优异吸附的性能。天然高分子壳聚糖无毒,经改性后的羧甲基壳聚糖仍属无毒物,可用于生活污水及含有重金属离子的废水的净化。
发明内容
本发明的目的在于用水溶性好的羧甲基壳聚糖为原料,通过引入具有活性基团的氨基多羧酸,经交联反应得到三维凝胶材料。
本发明涉及的羧甲基壳聚糖交联凝胶,其制备方法为:
将羧甲基壳聚糖溶于水中,恒温搅拌至溶解后加入氨基多羧酸和缩合剂,恒温搅拌反应。其中羧甲基壳聚糖与氨基多羧酸的摩尔比为(0.5-5):1,缩合剂与羧甲基壳聚糖的摩尔比为(0.4-1):1,反应温度为0-80 ℃,反应时间为0.01-48 h。其中氨基多羧酸为亚氨基二乙酸(IDA)、乙二胺四乙酸(EDTA)、氨基三乙酸(NTA)、二亚乙基三胺五乙酸(DTPA)、谷氨酸二乙酸四钠(GLDA)及其盐中的任意一种。缩合剂为N,N'-二异丙基碳二亚胺双伯胺(DIC)、1-羟基苯并***(HOBT)、4-二甲氨基吡啶(DMAP)、碳化二亚胺(EDCI)、2-(7-氧化苯并三氮唑)-N,N,N',N'-四甲基脲六氟磷酸盐(HATU)、二环己基碳二亚胺(DCC)/ N-羟基琥珀酰亚胺(NHS)、1-(3-二甲氨基丙基)-3-乙基碳二亚胺盐酸盐(EDC)/ N-羟基琥珀酰亚胺(NHS)中的任意一种或多种。
相比于现有技术,本发明的技术方案的优点在于:
(1)该羧甲基壳聚糖交联凝胶原料易得,合成方法简便,条件易于控制。
(2)该羧甲基壳聚糖交联凝胶含有大量活性基团,有利于其在吸附和药物缓释等方面的运用。
附图说明
图1为羧甲基壳聚糖原料及本发明实施例1制备的羧甲基壳聚糖交联凝胶的红外光谱图。
具体实施方式
实施例1
(1)称取 1g羧甲基壳聚糖,加入30 mL水,充分溶解。
(2)称取1.5 g EDTA、0.78 g EDC,加入羧甲基壳聚糖溶液中,30 ℃恒温搅拌,搅拌速度为150 rpm,反应2 h,得到羧甲基壳聚糖交联凝胶。
实施例2
(1)称取2 g羧甲基壳聚糖,加入30 mL水,充分溶解。
(2)称取1.5 g EDTA、0.78 g EDC、0.47 g NHS,加入羧甲基壳聚糖溶液中,25 ℃恒温搅拌,搅拌速度为150 rpm,反应2 h,得到羧甲基壳聚糖交联凝胶。
实施例3
(1)称取2 g羧甲基壳聚糖,加入40 mL水,充分溶解。
(2)称取1.5 g EDTA、0.78 g EDC、0.47 g NHS,加入羧甲基壳聚糖溶液中,25 ℃恒温搅拌,搅拌速度为150 rpm,反应2 h,得到羧甲基壳聚糖交联凝胶。
实施例4
(1)称取1 g羧甲基壳聚糖,加入30 mL水,充分溶解。
(2)称取0.53 g GLDA、0.29 g EDC、0.18 g NHS,加入羧甲基壳聚糖溶液中,25 ℃恒温搅拌,搅拌速度为150 rpm,反应4 h,得到羧甲基壳聚糖交联凝胶。

Claims (4)

1.一种羧甲基壳聚糖交联凝胶,其特征在于该凝胶按下述方法制备而成:将羧甲基壳聚糖溶解于水中,加入氨基多羧酸、缩合剂,恒温搅拌反应,即可形成凝胶。
2.根据权利要求1所述羧甲基壳聚糖交联凝胶,其特征在于:氨基多羧酸为亚氨基二乙酸(IDA)、乙二胺四乙酸(EDTA)、氨基三乙酸(NTA)、二亚乙基三胺五乙酸(DTPA)、谷氨酸二乙酸四钠(GLDA)及其盐中的任意一种。
3.根据权利要求1所述羧甲基壳聚糖交联凝胶,其特征在于:缩合剂为N, N'-二异丙基碳二亚胺双伯胺(DIC)、1-羟基苯并***(HOBT)、4-二甲氨基吡啶(DMAP)、碳化二亚胺(EDCI)、2-(7-氧化苯并三氮唑)-N,N,N',N'-四甲基脲六氟磷酸盐(HATU)、二环己基碳二亚胺(DCC)/ N-羟基琥珀酰亚胺(NHS)、1-(3-二甲氨基丙基)-3-乙基碳二亚胺盐酸盐(EDC)/N-羟基琥珀酰亚胺(NHS)中的任意一种或多种。
4.根据权利要求1所述羧甲基壳聚糖交联凝胶,其特征在于:氨基多羧酸与羧甲基壳聚糖的摩尔比为(0.5-5):1,反应温度为0-80 ℃,反应时间为0.01-48 h。
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CN111215036A (zh) * 2020-01-10 2020-06-02 北京工业大学 一种edta改性磁性壳聚糖环糊精吸附剂的制备方法及其应用
CN111793146A (zh) * 2020-07-15 2020-10-20 大连理工大学 一种pH敏感型PCA-g-CMCS聚合物及其水凝胶的制备方法
CN111793146B (zh) * 2020-07-15 2022-02-11 大连理工大学 一种pH敏感型PCA-g-CMCS聚合物及其水凝胶的制备方法
CN112777672A (zh) * 2020-12-07 2021-05-11 江苏海普功能材料有限公司 功能化二氧化硅改性除氟材料及其制备和应用
CN112777672B (zh) * 2020-12-07 2023-07-25 江苏海普功能材料有限公司 功能化二氧化硅改性除氟材料及其制备和应用
CN114736399A (zh) * 2022-05-20 2022-07-12 常州大学 高弹性羧甲基壳聚糖/酸化碳纳米管复合水凝胶及其制备方法
CN114736399B (zh) * 2022-05-20 2024-02-13 常州大学 高弹性羧甲基壳聚糖/酸化碳纳米管复合水凝胶及其制备方法

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Application publication date: 20191122