 |
 |
 |
 |
 |
 |
||
 |
 |
 |
 |
 |
| 5 | 1/1 | 返回列表 |
| 查看: 940 | 回復(fù): 4 | |||
| 當(dāng)前只顯示滿足指定條件的回帖，點(diǎn)擊這里查看本話題的所有回帖 | |||
新手已上路木蟲 (職業(yè)作家)
|
[交流]
利用納米技術(shù)生產(chǎn)更加安全環(huán)保的尿不濕和衛(wèi)生產(chǎn)品 已有3人參與
|
||
|
根據(jù)發(fā)表在《Applied Materials Today》上的一項(xiàng)最新研究，一種由微型納米纖維制成的新材料，可以替代現(xiàn)在尿不濕和衛(wèi)生產(chǎn)品中使用的潛在有害物質(zhì)。 該論文的作者（來自印度理工學(xué)院）介紹，他們的新材料對環(huán)境影響較小，而且比人們現(xiàn)在使用的材料更加安全。 過去幾十年里，一次性尿不濕，衛(wèi)生棉和其它衛(wèi)生用品用高吸水樹脂（SAPs）作為吸收劑。這些物質(zhì)能夠吸收幾倍于自身重量的液體；平均每個(gè)尿不濕能吸收30倍于自身重量的體液。但是這個(gè)材料不能生物降解：在理想條件下，一個(gè)尿不濕要花500年才能降解。SAPs還會(huì)產(chǎn)生中毒性休克綜合征這樣的健康問題，在20世紀(jì)80年代它們被禁止在衛(wèi)生棉上使用。 據(jù)研究人員介紹，一種由靜電醋酸纖維素納米纖維（electrospun cellulose acetate nanofibers）制成的新材料，沒有這些缺點(diǎn)。在他們的研究中，研究團(tuán)隊(duì)分析了該材料，他們認(rèn)為可以代替目前女性衛(wèi)生產(chǎn)品中使用的SAPs。 “長時(shí)間使用市售產(chǎn)品，可能會(huì)導(dǎo)致中毒性休克綜合征和其他癥狀，開發(fā)SAPs的安全替代品，這非常重要，” 該論文的通訊作者錢德拉·沙馬博士說。我們建議在不改變產(chǎn)品性能，甚至提高其吸水性和舒適性的基礎(chǔ)上，消除目前市售產(chǎn)品中使用的有害物質(zhì)，非生物降解高吸水性樹脂。 納米纖維是利用電紡紗技術(shù)生產(chǎn)的一種長而薄的纖維。由于它們的表面積大，研究人員認(rèn)為它們比現(xiàn)有材料的吸水性更高。市售衛(wèi)生棉中使用的材料是由扁平的，帶狀纖維制成，大約30微米后。相比之下，納米纖維的厚度是150納米，要比目前材料薄200倍。該材料比現(xiàn)有產(chǎn)品中使用的材料更舒適，在使用后留下的殘留物更少。 納米纖維材料也是多孔材料（超過90%），傳統(tǒng)材料（80%），因此它吸水性更強(qiáng)。還可以證明一點(diǎn)：用生理鹽水和人工合成尿液測試，靜電紡織纖維材料比市售產(chǎn)品更吸水。他們也測試了兩個(gè)添加SAPs的納米纖維材料的不同版本，對比結(jié)果表明，單獨(dú)使用納米纖維的效果更好。 “我們的研究結(jié)果表明，靜電紡織納米纖維在吸水性和舒適性等方面都優(yōu)于市售的衛(wèi)生產(chǎn)品，我們認(rèn)為這是取代目前使用的有害物質(zhì)產(chǎn)品的很好備選，”夏爾馬博士說�！拔覀兿Ｍㄟ^衛(wèi)生產(chǎn)品更安全的使用和處置，能夠?qū)θ祟惤】岛铜h(huán)境產(chǎn)生積極影響�！� 以下為英文原文： Nanotech could give us safer, greener diapers and sanitary products A new material made of tiny nanofibers could replace potentially harmful materials found in diapers and sanitary products, according to new research published in Applied Materials Today. The authors of the new paper, from the Indian Institute of Technology, say their new material would have less of an environmental impact and be safer for humans than existing materials. For the last few decades, disposable diapers, sanitary napkins and other sanitary products have been made absorbent using superabsorbent polymers (SAPs). These materials are capable of absorbing many times their own weight in liquid; the average diaper can absorb 30 times its own weight in bodily fluids. But the material is not biodegradable: in ideal conditions, it can take as long as 500 years for a diaper to degrade. And SAPs have been linked to health problems like Toxic Shock Syndrome, leading to their ban in tampons in the 1980s. According to researchers, a new material – made of electrospun cellulose acetate nanofibers – does not have these drawbacks. In their study the team analyzed the material, and they suggest it could replace the use of SAPs in female hygiene products. "Prolonged use of commercially available products could lead to toxic shock syndrome and other conditions, so it's vital to develop a safe alternative to SAPs," explained Dr. Chandra Sharma, corresponding author of the study. "We propose to eliminate the use of harmful, non-biodegradable superabsorbent polymers from commercially available sanitary napkins without compromising the performance, and even enhancing absorbency and comfort." The nanofibers are long and very thin fibers made using a technique called elecrospinning – spinning using electricity. Because of their large surface area compared to their volume, the researchers thought they would be more absorbent than existing materials. They compared the performance of the material to commercially available sanitary napkins and found it to be even more absorbent. The material used in commercially available sanitary napkins is made up of flat, ribbon-like fibers that are about 30 micrometers thick. In contrast, the nanofibers are about 150 nanometers thick – about 200 times thinner. The material is more comfortable than those used in existing products and leaves behind less residue after use. The nanofiber material is also more porous (over 90 percent) than the traditional material used (80 percent), making it more absorbent. This was confirmed: in tests using saline and synthetic urine, the electrospun fiber material was much more absorbent than commercially available products. They also tested two alternative versions of the nanofiber material with SAPs added and found they were not as absorbent as the nanofibers alone. "Our results show that electrospun nanofibers outperform commercially available sanitary products in terms of absorbency and comfort, and we think this makes it a good candidate to replace the potentially harmful materials currently used," said Dr. Sharma. "By making sanitary products safer to use and dispose, we hope to have a global impact on health and the environment." |
回復(fù)此樓» 猜你喜歡
化工學(xué)院（學(xué)院正式調(diào)劑群+聯(lián)系方式）
已經(jīng)有0人回復(fù)
-
化工學(xué)院（學(xué)院官方群）-院士團(tuán)隊(duì)招生-學(xué)生自由度高-培養(yǎng)模式成熟高效
已經(jīng)有0人回復(fù)
-
金屬材料論文潤色/翻譯怎么收費(fèi)?
已經(jīng)有188人回復(fù)
-
黑龍江大學(xué)分析化學(xué)招調(diào)劑
已經(jīng)有0人回復(fù)
-
武漢高校國家級人才團(tuán)隊(duì)招收材料，化學(xué)，紡織等專業(yè)碩士調(diào)劑生
已經(jīng)有26人回復(fù)
-
紡大化工學(xué)院（官方群）-院士團(tuán)隊(duì)招生-學(xué)生自由度高發(fā)展好-培養(yǎng)模式成熟
已經(jīng)有0人回復(fù)
-
溫州大學(xué)化材學(xué)院王娟課題組招生
已經(jīng)有5人回復(fù)
-
學(xué)院官方群-院士團(tuán)隊(duì)招生-學(xué)生自由度高-培養(yǎng)模式成熟已有10余名學(xué)生赴985海外深造
已經(jīng)有0人回復(fù)
-
武漢紡織大學(xué)化工學(xué)院官方群-院士團(tuán)隊(duì)招生-學(xué)生自由度高-10余名學(xué)生赴985海外深造
已經(jīng)有0人回復(fù)
-
南昌航空大學(xué)蔣華麟教授課題組招收化學(xué)、環(huán)境、碳達(dá)峰碳中和及相關(guān)專業(yè)碩士信息
已經(jīng)有0人回復(fù)
-
湖北師范大學(xué)復(fù)試調(diào)劑
已經(jīng)有0人回復(fù)
» 本主題相關(guān)商家推薦: (我也要在這里推廣)
4樓2017-01-31 15:52:06
2樓2016-10-12 10:25:27
新手已上路
木蟲 (職業(yè)作家)
- 應(yīng)助: 82 (初中生)
- 金幣: 4153.3
- 紅花: 422
- 帖子: 4933
- 在線: 616.2小時(shí)
- 蟲號: 3474904
- 注冊: 2014-10-14
- 性別: GG
- 專業(yè): 元素化學(xué)
3樓2016-10-15 19:58:38
gxytju2008
專家顧問 (文壇精英)
-
專家經(jīng)驗(yàn): +1654 - MN-EPI: 2
- 應(yīng)助: 4105 (副教授)
- 貴賓: 0.053
- 金幣: 47554.2
- 散金: 4089
- 紅花: 503
- 帖子: 14997
- 在線: 7315.6小時(shí)
- 蟲號: 1111232
- 注冊: 2010-09-29
- 性別: GG
- 專業(yè): 材料物理化學(xué)
- 管轄: 微米和納米
5樓2017-01-31 19:13:01
| 最具人氣熱帖推薦 [查看全部] | 作者 | 回/看 | 最后發(fā)表 | |
|---|---|---|---|---|
|
[有機(jī)交流]
 甲基亞磺磺酸鈉和甲基磺酸酯反應(yīng)機(jī)理
 10+3
|
kaobao456 2026-03-29 | 4/200 |
|
|---|---|---|---|---|
|
|
[考研] 求收留 +6 | 1943443204 2026-03-28 | 6/300 |
|
|
|
[考研] 334分 一志愿武理 材料求調(diào)劑 +16 | 李李不服輸 2026-03-26 | 16/800 |
|
|
|
[考研] 291求調(diào)劑 +8 | HanBeiNingZC 2026-03-24 | 8/400 |
|
|
|
[考研] 0703本科鄭州大學(xué)求調(diào)劑 +7 | nhj_ 2026-03-25 | 7/350 |
|
|
|
[考研] 282求調(diào)劑 +4 | wcq131415 2026-03-24 | 4/200 |
|
|
|
[考研] 290求調(diào)劑 +3 | dfffsar 2026-03-29 | 3/150 |
|
|
|
[考研]
一志愿武漢理工，總分321，英一數(shù)二，求老師收留。
+11
|
nnnnnnn5 2026-03-25 | 11/550 |
|
|
|
[考研] 327求調(diào)劑 +6 | 汲亦昊 2026-03-29 | 6/300 |
|
|
[考研] 2026年華南師范大學(xué)歡迎化學(xué)，化工，生物，生醫(yī)工等專業(yè)優(yōu)秀學(xué)子加入！ +3 | llss0711 2026-03-28 | 6/300 |
|
|
|
[考研] 數(shù)一英一271專碩（085401）求調(diào)劑，可跨 +7 | 前行必有光 2026-03-28 | 8/400 |
|
|
|
[考研] 085602 化工專碩 338分 求調(diào)劑 +12 | 路癡小琪 2026-03-27 | 12/600 |
|
|
|
[考研] 求調(diào)劑 +6 | 蘆lty 2026-03-25 | 7/350 |
|
|
|
[考研] 085602 307分 求調(diào)劑 +7 | 不知道叫什么！ 2026-03-26 | 7/350 |
|
|
|
[考研] 一志愿上海理工能源動(dòng)力（085800）310分求調(diào)劑 +3 | zhangmingc 2026-03-27 | 4/200 |
|
|
|
[考研] 安徽大學(xué)專碩生物與醫(yī)藥專業(yè)(086000)324分，英語已過四六級，六級521，求調(diào)劑 +4 | 美味可樂雞翅 2026-03-26 | 4/200 |
|
|
|
[考研] 08開頭275求調(diào)劑 +4 | 拉誰不重要 2026-03-26 | 4/200 |
|
|
|
[考研] 351求調(diào)劑 +4 | 麥克阿磊 2026-03-24 | 4/200 |
|
|
|
[考研] 081200-11408-276學(xué)碩求調(diào)劑 +3 | 崔wj 2026-03-26 | 3/150 |
|
|
|
[考研] 303求調(diào)劑 +6 | 藍(lán)山月 2026-03-25 | 6/300 |
|