Haɗawa da halayen haske na ruwa -mai narkewa cellulose ether / EU (III)

Roba ruwa -soluble cellulose ether / EU (III) tare da haske yi, wato, carboxymethyl cellulose (CMC) / EU (III), methyl cellulose (MC) / EU (III), da kuma Hydroxyeyl cellulose (HEC) / EU (III) yayi magana akan tsarin waɗannan hadaddun kuma an tabbatar da shi ta hanyar FTIR. Siffar ƙaddamar da waɗannan abubuwan da suka dace shine EU (III) a 615nm. Canjin yar tsana na lantarki (ta 5D0→7F2 ku). Sauyawa CMC yana rinjayar bakan mai kyalli da ƙarfin CMC/EU (III). Abun cikin EU (III) shima yana shafar ƙarfin hadaddun. Lokacin da abun ciki na EU (III) shine 5% (rabo taro), ƙarfin kyalli na waɗannan matches na ruwa-soluble cellulose ether EU (III) ya kai matsakaicin.

Mahimman kalmomi: ruwa - ether cellulose mai narkewa; Eu (III); daidaita; mai haske

1.Gabatarwa

Cellulose shine macrometer na layi na layiβ-D rukunin glucose wanda aka haɗa ta (1,4) barasa. Saboda sabuntawar sa, biodegradable, biocompatibility, nazarin cellulose yana ƙaruwa. Hakanan ana amfani da Cellulose azaman fili na gani, lantarki, maganadisu, da aikin catalytic a matsayin ƙungiyar alkyr oxygen ligand na hukuma da yawa. Y.OKAMOTO da masu haɗin gwiwa sun yi nazarin gwaje-gwajen shirye-shirye da aikace-aikace masu ƙunshe da polymers ion da ba kasafai ba. Sun lura cewa kwamfutocin da suka dace da CMC/TB suna da ƙaƙƙarfan zagaye mai kyalli. CMC, MC, da HEC, a matsayin mafi mahimmanci kuma mafi yawan amfani da ruwa na cellulose -soluble cellulose, sun sami babban kulawa saboda kyakkyawan aikin su na solubility da ƙimar aikace-aikace mai yawa, musamman ma fasahar lakabin kyalli Tsarin cellulose a cikin maganin ruwa yana da kyau sosai. tasiri.

Wannan labarin ya ba da rahoton jerin ruwa-mai narkewa cellulose ether, wato shirye-shirye, tsari da kuma kyalli Properties kafa ta matomoid kafa ta CMC, MC da HEC da EU (III).

2. Gwaji

2.1 Kayan gwaji

CMC (digiri na maye gurbin (DS) shine 0.67, 0.89, 1.2, 2.4) kuma HEC ana bayar da su ta KIMA CHEMICAL CO., LTD.

MC (DP=450, danko 350 ~ 550mpa·s) KIMA CHEMICAL CO., LTD. Eu2O3 (AR) An samar da shi ta Shanghai Yuelong Chemical Factory.

2.2 Shiri na CMC (HEC, MC) / EU (III) hadaddun

EuCl3·Maganin 6H2O (maganin A): narkar da Eu2Os a cikin 1: 1 (rabin girma) HCI kuma tsarma zuwa 4. 94X 10-2 mol/L.

CMC/Eu(III) hadaddun m tsarin tsarin: Narkar da 0.0853g na CMC tare da daban-daban DSs a cikin ruwa, sa'an nan ƙara ma'auni Eu (III) dropwise zuwa ta ruwa bayani, sabõda haka, da taro rabo na CMC: Eu (III) ne 19: 1. Dama, reflux na 24 hours, Rotary evaporate zuwa bushewa, bushe bushe, niƙa zuwa foda tare da agate turmi.

CMC (HEC, MC/Eu (III) tsarin maganin ruwa mai ruwa: Ɗauki 0.0853 g na CMC (ko HEC ko MC)) samfurin kuma narkar da shi a cikin H2O, sa'an nan kuma ƙara daban-daban na bayani A (don shirya daban-daban Eu (III) Concentration complexion ), motsawa, mai tsanani zuwa reflux, matsawa zuwa wani adadin yawan adadin flask na volumetric, ƙara ruwa mai narkewa don tsarma zuwa alamar.

2.3 Fluorescence spectra na CMC (HEC, MC) / EU (III) hadaddun

Duk hadaddun tsarin ruwa an auna su da RF-540 fluorescence spectrophotometer (Shimadzu, Japan). An auna tsarin tsattsauran ra'ayi na CMC/Eu(III) tare da na'urar hasashe mai walƙiya ta Hitachi MPE-4.

2.4 Fourier canza infrared spectroscopy na CMC (HEC, MC) / Eu (III) hadaddun

An ƙarfafa FTIR IR na hadaddun tare da Aralect RFX-65AFTIR kuma an danna cikin allunan KBr.

3. Sakamako da Tattaunawa

3.1 Samuwar da tsarin CMC (HEC, MC) / EU (III) hadaddun

Saboda hulɗar lantarki, CMC yana cikin ma'auni a cikin bayani mai tsarma ruwa, kuma nisa tsakanin sassan kwayoyin halitta na CMC ya yi nisa, kuma ƙarfin juna yana da rauni. Lokacin da Eu (III) aka ƙara dropwise a cikin bayani, da CMC kwayoyin sarƙoƙi a cikin bayani The conformational Properties an canza duk, da electrostatic ma'auni na farko bayani da aka lalace, da CMC kwayoyin halitta oyan karkata. Lokacin da Eu (III) ya haɗu tare da ƙungiyar carboxyl a cikin CMC, matsayin haɗin kai bazuwar (1:16), Saboda haka, a cikin wani bayani mai tsarma ruwa, Eu (III) da CMC suna daidaitawa tare da ƙungiyar carboxyl a cikin sarkar, kuma wannan bazuwar haɗin kai tsakanin Eu (III) da sarƙoƙin ƙwayoyin cuta na CMC ba shi da kyau don fitar da iska mai ƙarfi, saboda yana sanya wani ɓangare na matsayin chiral ya ɓace. Lokacin da aka yi zafi da maganin, motsi na sassan kwayoyin CMC yana haɓaka, kuma an rage nisa tsakanin sassan kwayoyin CMC. A wannan lokacin, haɗin kai tsakanin Eu (III) da ƙungiyoyin carboxyl tsakanin sassan kwayoyin CMC yana da sauƙin faruwa.

An tabbatar da wannan haɗin kai a cikin bakan CMC/Eu(III) FTIR. Kwatanta masu lankwasa (e) da (f), 1631cm-1 kololuwa a cikin lanƙwasa (f) yana raunana a cikin (e), kuma sabbin kololuwa guda biyu 1409 da 1565cm-1 sun bayyana a cikin lanƙwasa (e), waɗanda sune COO - Base vs kuma vas, wato CMC/Eu(III) wani sinadari ne na gishiri, kuma CMC da Eu(III) galibi ana ɗaure su ne ta hanyar haɗin gwiwar ionic. A cikin lanƙwasa (f), kololuwar 1112cm-1 da aka kafa ta hanyar ɗaukar tsarin ether na aliphatic da babban kololuwar ƙima a 1056cm-1 wanda ke haifar da tsarin acetal da hydroxyl suna raguwa saboda samuwar hadaddun, kuma kyawawan kololuwa sun bayyana. . Na'urorin lantarki guda biyu na O atom a cikin C3-O da na'urorin lantarki guda biyu na O atom a cikin ether ba su shiga cikin haɗin kai ba.

Kwatanta masu lankwasa (a) da (b), ana iya ganin cewa makada na MC a cikin MC/Eu (III), ko iskar oxygen ce a cikin rukunin methoxyl ko iskar oxygen a cikin zoben glucose mai anhydrous, ya canza, wanda ya nuna. cewa a cikin MC Duk oxygens suna cikin haɗin kai tare da Eu (III).

3.2 Hasken haske na rukunin CMC (HEC, MC) / Eu (III) da abubuwan tasirin su

3.2.1 Hasken haske na rukunin CMC (HEC, MC) / EU (III)

Tunda kwayoyin ruwa suna da tasiri masu kashe kyalli, ƙarfin fitar da ion lanthanide mai ruwa da ruwa gabaɗaya yana da rauni. Lokacin da Eu (III) ions aka daidaita tare da ruwa mai narkewa cellulose ether, musamman tare da polyelectrolyte CMC kwayoyin, za a iya cire wani bangare ko duk na ruwa da aka hade, da kuma fitar da fitar da Eu (III) za a inganta a sakamakon. Siffofin fitar da wa annan katafaren duk sun ƙunshi 5D0→7F2 lantarki dipole canji na Eu(III) ion, wanda ke samar da kololuwa a 618nm.

3.2.2 Abubuwan da ke shafar kaddarorin kyalli na CMC (HEC, MC) / Eu (III)

Kaddarorin ethers na cellulose suna shafar ƙarfin haske, alal misali, rukunin CMC/Eu (III) da DSs daban-daban suka kafa suna da kaddarorin haske daban-daban. Lokacin da DS na CMC ba 0.89 ba, bakan haske na hadaddun CMC/Eu (III) kawai yana da kololuwa a 618nm, amma lokacin da DS na CMC shine 0.89, a cikin kewayon gwajin mu, m CMC/Eu ( III) III) Akwai kololuwar mafi rauni guda biyu a cikin bakan watsin, su ne 5D0 na magnetic dipole→7F1 (583nm) da canjin wutar lantarki dipole 5D0→7F3 (652nm). Bugu da ƙari, ƙarfin hasken wuta na waɗannan ɗakunan su ma sun bambanta. A cikin wannan takarda, an yi ƙulla ƙuri'ar fitar da Eu (III) a 615nm akan DS na CMC. Lokacin da DS na CMC=0.89, ƙarfin haske na m-jihar CMC/Eu(III) ya kai matsakaicin. Duk da haka, danko (DV) na CMC ba shi da wani tasiri a kan ƙarfin haske na ɗakunan da ke cikin iyakar wannan binciken.

4 Kammalawa

Sakamakon da ke sama ya tabbatar da cewa ginshiƙi na ether mai narkewa mai narkewa ruwa / Eu (III) suna da kaddarorin fitar da kyalli. Siffofin watsar da waɗannan rukunin gidaje sun ƙunshi canjin lantarki na dipole na Eu (III), kuma kololuwar 615nm ya haifar da 5D0.→Canjin 7F2, yanayin ether cellulose da abun ciki na Eu (III) na iya shafar ƙarfin haske.