TWI385124B - 可除氯之聚葡萄胺醣纖維及其製造方法 - Google Patents
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Description
本發明是有關於一種除氯纖維,特別是關於一種可除氯之聚葡萄胺醣纖維。
目前常見的水質淨化處理手段,包括去除水中顆粒雜質、去除水中有機物、去除水中餘氯、吸附水中重金屬、抑菌、軟化水質等。
有多種淨水材料能夠達到單一或部分上述淨水效果。舉例而言,可利用活性碳來去除水中有機物、氯、三氯甲烷及部份重金屬,但活性碳吸附有機物之後,反而會成為病原菌及細菌繁殖之溫床,因此必須定期更換。亞硫酸鈣也是一種常見的淨水材料,可用於去除水中餘氯,然而利用目前技術製備之亞硫酸鈣粒子硬度較低,因此不耐衝擊以及不耐久存。聚葡萄胺醣(chitosan)具備吸附重金屬之能力,且可製成纖維之型態,相較於顆粒型態之亞硫酸鈣,聚葡萄胺醣具有較佳的產業應用能力。
然而,上述及其他淨水材料各自有其淨水能力或應用上之限制。因此,亟需提出一種新的淨水材料,其可提供多重淨水功能以及較佳的產業應用性。
因此,本發明之一態樣就是在提供一種可除氯之聚葡萄胺醣纖維的製備方法。根據本發明一實施例,上述製備
方法包含配製一紡絲溶液,其係將亞硫酸鈣以及聚葡萄胺醣或其衍生物分散於溶劑中,其中聚葡萄胺醣或其衍生物與亞硫酸鈣之重量比為約5:1至約1:1;以及利用上述紡絲溶液進行濕式紡絲。
根據本發明一實施例,可除氯之聚葡萄胺醣纖維係由濕式紡絲技術所製備。上述可除氯之聚葡萄胺醣纖維包含亞硫酸鈣以及聚葡萄胺醣或其衍生物。其中在製備該可除氯之聚葡萄胺醣纖維時所用之聚葡萄胺醣或其衍生物與亞硫酸鈣之重量比為約5:1至約1:1。
本發明另一態樣提出一種除氯淨水材料,其至少包含上述可除氯之聚葡萄胺醣纖維。根據本發明之其他態樣,利用上述可除氯之聚葡萄胺醣纖維所製成之除氯淨水材料可運用於家用濾水裝置或工業用濾水裝置。
美國專利US 5,897,821號專利揭露了利用濕式紡絲法將聚葡萄胺醣製成聚葡萄胺醣纖維之方法。由於聚葡萄胺醣本身具備抗菌、重金屬吸附以及多種其他功能,因此可將聚葡萄胺醣纖維製成功能性紡織品。然而,聚葡萄胺醣纖維的除氯效果有限,因此作為淨水材料時,主要的訴求功能仍為重金屬吸附。
有鑑於此,本發明之一態樣就是在提供一種可除氯之聚葡萄胺醣纖維的製備方法。根據本發明之實施例,係在聚葡萄胺醣或其衍生物之紡絲液中加入亞硫酸鈣粉末,並使其均勻分散於溶劑中,而後進行濕式紡絲,以得到兼具
除氯以及重金屬吸附兩種功能之淨水纖維。
然而,在製備上述可除氯之聚葡萄胺醣纖維時,發現於紡絲溶液中加入亞硫酸鈣粉末時,紡絲溶液往往會出現沈澱使得紡絲困難,或者是紡絲所得之聚葡萄胺醣纖維易於脆裂而無法供產業上應用。
因此,根據本發明一實施例,提供一種可除氯之聚葡萄胺醣纖維的製備方法,該方法包含配製一紡絲溶液,其係將亞硫酸鈣以及聚葡萄胺醣或其衍生物分散於溶劑中,其中聚葡萄胺醣或其衍生物與亞硫酸鈣之重量比為約5:1至約1:1;以及利用上述紡絲溶液進行濕式紡絲。
根據本發明實施例,上述聚葡萄胺醣衍生物可為幾丁質(chitin)或其衍生物。
根據本發明實施例,上述亞硫酸鈣可為不含結晶水之亞硫酸鈣。此外,根據本發明實施例中,亞硫酸鈣在該紡絲溶液中之重量百分濃度為約3-5%。
下文將詳述根據本發明實施例製備可除氯之聚葡萄胺醣纖維之方法與材料;並以多個實驗例及比較例來分析比較其氯去除氯以及重金屬吸附率。
根據本發明一實施例,可除氯之聚葡萄胺醣纖維的製備方法如下:在1000 g重量百分濃度約3-5%之醋酸水溶液中加入50 g之聚葡萄胺醣以及50 g之無水亞硫酸鈣粉末,以得到紡絲溶液;
利用均質機攪拌上述紡絲溶液,使得其成為均勻的分散液;利用濕紡機將上述步驟所得之紡絲溶液抽絲,並在重量濃度5%之氫氧化鈉鹼性溶液中成型以得到一纖維;將上述纖維水洗數次直至纖維成中性,即可得到根據本實施例之可除氯之聚葡萄胺醣纖維。
根據本發明實施例,利用上述方法製備之可除氯之聚葡萄胺醣纖維包含亞硫酸鈣以及聚葡萄胺醣或其衍生物,其中聚葡萄胺醣或其衍生物與亞硫酸鈣之重量比為約5:1至約1:1。此外,上述可除氯之聚葡萄胺醣纖維之直徑為約100-250 μm。
在本發明多種實驗例中,改變上述方法中所用之亞硫酸鈣的重量百分比,以得到具有不同亞硫酸鈣添加量之可除氯之聚葡萄胺醣纖維。此外,利用習知聚葡萄胺醣纖維以及亞硫酸鈣除氯粒子作為比較例,並比較上述實驗例與比較例的除氯淨水效果。表1列出不同實驗例中,製備可除氯之聚葡萄胺醣纖維時所用亞硫酸鈣粉末之重量百分濃度。
在本系列實驗中,利用餘氯試劑來測試各實驗例及比較例之淨水材料的除氯效果。上述餘氯試劑主要成份為重量濃度為0.1的鄰-聯甲苯胺鹽酸鹽(o-Tolidine hydrochloride)溶液,其測試方法如下。首先,將50 μl之餘氯試劑加入原水中,使其反應並呈色。接著,利用分光光度計進行測定,吸收波長為約450 nm,以定量原水中之餘氯含量。其後,使原水通過上述各種淨水材料,並重複上述步驟,以定量經過上述淨水材料後,水中的餘氯含量。
本系列實驗例中,以室溫(約25℃)下,以原水的氯含量作為100%,並分別計算經過其他淨水材料後,水中餘氯含量減少之量,以得到個別淨水材料之氯去除率。表2至表5列出各實驗例及比較例之淨水材料的除氯效果。應注意,在下列各表格中,由於取樣時間不同,導致各組實驗中原水中的氯離子濃度不同,然而在同一表格中各實驗例及比較例係採用同時取樣之樣本。
由上表2可以發現,實驗例A中亞硫酸鈣量之添加量約1%,此時所得含亞硫酸鈣之聚葡萄胺醣纖維的除氯能力為約77%,與習知聚葡萄胺醣纖維的除氯能力(約76%)不相上下。也就是說,在此種亞硫酸鈣添加量下,無法賦予聚葡萄胺醣纖維額外的氯去除能力。
另一方面,由表5可知,當亞硫酸鈣量之添加量約10%(實驗例D)時,此時可能由於亞硫酸鈣的添加量過高,而導致影響聚葡萄胺醣纖維本身的物理性質,因而在製備過程中,所得紡絲溶液出現大量沈澱而不易形成均勻的分散液,即便進行濕式紡絲製程,所得之含亞硫酸鈣的聚葡萄胺醣纖維也非常容易脆裂,因而不適合進行實際的產業運用。
由上述系列實驗可知,僅當亞硫酸鈣的添加量為約3-5%時,所得之纖維才會具備良好的除氯能力以及產業利用性。
聚葡萄胺醣纖維本身即具備吸附重金屬之能力,為了進一步確認根據本發明實施例製備可除氯之聚葡萄胺醣纖維時,是否會損及其原本之重金屬吸附能力,下列實驗利用ICP-AES標準測試方法,來測試上述實驗例C(請確認)之可除氯之聚葡萄胺醣纖維以及比較例1之聚葡萄胺醣纖
維的重金屬吸附能力。表6列出以上述纖維進行錳(Mn)、鎘(Cd)、鈷(Co)及鎳(Ni)等重金屬之吸附試驗的結果。
由本系列試驗可知,實驗例C之可除氯之聚葡萄胺醣纖維對於錳、鎘及鈷的吸附能力均略優於習知聚葡萄胺醣纖維,至於兩者對於鎳的吸附能力則不相上下。由此可知,利用本發明實施例之方法來製備可除氯之聚葡萄胺醣纖維,不會損及其本身的重金屬吸附能力,而又能兼具優良的除氯能力。
對於家庭用水而言,水中的鈣離子及鎂離子殘留率也是重要的考量。利用習知亞硫酸鈣除氯粒子作為淨水材料時,問題之一就是會導致水中鈣離子濃度升高。因此亦根據ICP-AES標準來測試分別利用上述比較例1、比較例2及實驗例C(請確認)之淨水材料時,經淨水處理後之水
中鈣離子及鎂離子殘留率,表7為相關試驗結果。
由表7可以發現,原水中的鈣離子濃度約為27.5 ppm,當利用比較例2之習知亞硫酸鈣除氯粒子作為淨水材料時,會使得水中鈣離子濃度顯著升高至49.75 ppm。而利用實驗例C之可除氯之聚葡萄胺醣纖維作為淨水材料時,水中的鈣離子濃度為40.05 ppm。
由上述說明可知,根據本發明實施例之可除氯之聚葡萄胺醣纖維不但具備重金屬吸附能力,更有良好的除氯能力。此外,上述可除氯之聚葡萄胺醣纖維的產業應用性非常廣泛,可製成各種淨水材料,因此在民生上的應用範圍遠大於習知的除氯粒子。
根據本發明一態樣,利用可除氯之聚葡萄胺醣纖維作為除氯淨水材料時,因為纖維的作用表面積大,因此僅需添加少量的亞硫酸鈣,即可達到與習知亞硫酸鈣除氯粒子相近的除氯效果。相對地,由於亞硫酸鈣成分的添加量較低,經淨水處理後之水中殘留的鈣離子濃度也較低。
根據本發明另一態樣,可將上述可除氯之聚葡萄胺醣
纖維所組成之除氯淨水材料用於家用濾水裝置以及工業用濾水裝置。由於本發明實施例之除氯淨水材料係以纖維的形式呈現,此一除氯淨水材料除了本身吸附重金屬以及除氯的功能之外,尚可具有物理的過濾性。舉例來說,可將根據本發明實施例之可除氯之聚葡萄胺醣纖維製成濾網。
雖然本發明已以較佳實施例揭露如上,然其並非用以限定本發明,任何熟習此技藝者,在不脫離本發明之精神和範圍內,當可作各種之更動與潤飾,因此本發明之保護範圍當視後附之申請專利範圍所界定者為準。
Claims (11)
- 一種可除氯之聚葡萄胺醣纖維的製備方法,該方法包含:(a)配製一紡絲溶液,其係將聚葡萄胺醣或其衍生物分散於一溶劑中,其中該聚葡萄胺醣或其衍生物佔該溶劑之重量百分比為約3-5%; (b)將亞硫酸鈣加入該紡絲溶液中形成溶劑中,其中該亞硫酸鈣之重量百分濃度為約3-5%;以及(c)利用一濕紡機將步驟(b)所得之該紡絲溶液抽絲。
- 如請求項1所述之方法,其中該聚葡萄胺醣衍生物為幾丁質或其衍生物。
- 如請求項1所述之方法,其中該亞硫酸鈣為不含結晶水之亞硫酸鈣。
- 如請求項1所述之方法,其中該溶劑為3-5%醋酸水溶液。
- 如請求項1所述之方法,其中步驟(c)更包含利用重量百分濃度約5%之氫氧化鈉鹼性溶液以使該可除氯之聚葡萄胺醣纖維成型。
- 一種可除氯之聚葡萄胺醣纖維,其係由濕式紡絲技 術所製備,該可除氯之聚葡萄胺醣纖維包含:亞硫酸鈣;以及聚葡萄胺醣或其衍生物,其中聚葡萄胺醣或其衍生物與該亞硫酸鈣之重量比為約5:1至約1:1。
- 如請求項6所述之可除氯之聚葡萄胺醣纖維,其中該可除氯之聚葡萄胺醣纖維之直徑為約100 μm-250 μm。
- 如請求項6所述之可除氯之聚葡萄胺醣纖維,其中該聚葡萄胺醣衍生物為幾丁質或其衍生物。
- 一種除氯淨水材料,其至少包含如請求項6所述之可除氯之聚葡萄胺醣纖維。
- 一種家用濾水裝置,其至少包含如請求項6所述之可除氯之聚葡萄胺醣纖維所組成之除氯淨水材料。
- 一種工業用濾水裝置,其至少包含如請求項6所述之可除氯之聚葡萄胺醣纖維所組成之除氯淨水材料。
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US12/344,948 US20100084336A1 (en) | 2008-10-02 | 2008-12-29 | Dechlorinating Chitosan Fibers and Method for Manufacturing the Same |
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TW384320B (en) * | 1996-01-10 | 2000-03-11 | Moelnlycke Ab | Polysaccharide fibers, method of producing the polysaccharide fibers and absorbent structure including the same |
TW200827013A (en) * | 2006-12-22 | 2008-07-01 | Taiwan Textile Res Inst | A water-treatment particle and a method of manufacturing thereof |
TWM338155U (en) * | 2007-05-29 | 2008-08-11 | Taiwan Textile Res Inst | A fabric for filtering chlorine |
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JP3622366B2 (ja) * | 1996-09-05 | 2005-02-23 | 日本エクスラン工業株式会社 | キトサン繊維の製造方法 |
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TW384320B (en) * | 1996-01-10 | 2000-03-11 | Moelnlycke Ab | Polysaccharide fibers, method of producing the polysaccharide fibers and absorbent structure including the same |
TW200827013A (en) * | 2006-12-22 | 2008-07-01 | Taiwan Textile Res Inst | A water-treatment particle and a method of manufacturing thereof |
TWM338155U (en) * | 2007-05-29 | 2008-08-11 | Taiwan Textile Res Inst | A fabric for filtering chlorine |
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