Kutora bhakitiriya cellulose seyakagadzirwa, synthesize 2-hydroxy-3-sulfate propyate cellulose ether. Iyo infrared spectrometer inoongorora chimiro chechigadzirwa. Yakanakisa maitirwo mamiriro ekugadzirwa kweiyo base bacterial cellulose ether. Zvigumisiro zvakaratidza kuti kuchinjana kwe2-hydroxy-3-sulfonic acid-based propyate bacterial ether yakagadzirwa pasi pekugadzirisa mamiriro ezvinhu aiva 0.481mmol / g.
Keywords: bhakitiriya cellulose; 2-hydroxyl-3-sulfonic acid-based gornemine cellulose ether; exchange capacity
Microbial synthetic bacterial cellulose yakafanana nekudyara cellulose mumakemikari kuumbwa uye chimiro chemolecular. Iyo yakatwasuka polysaccharide yakabatana neD-pyrarot glucose ineβ-1, 4-glycoside zvisungo. Kuenzaniswa nechirimwa cellulose, bhakitiriya cellulose ine hunhu huri nani. Iyo ndeye Ultra-micro fiber net inoumbwa ne-ultra-micro fibers. Iripo muchimiro che pure cellulose uye ine akawanda akasiyana mabasa. Izvo zvikamu zveacoustic midziyo uye migodhi yemafuta zvakashandiswa zvakanyanya.
2-hydroxyl-3-sulfonate cellular cellulose ether yakakosha cellulose derivative inogona kugadzirwa nemhando yepamusoro yekunyudza mvura. Inogona zvakare kushandiswa seyakasimba kuchena kweadsorption yeheavy metal ion uye protein se cation. Feng Qingqin, Jie Zhefeng uye imwe cellulose inoshandiswa mumashanga emupunga wechibage kugadzira 2-hydroxyl-3-sulfate cellulose ether yakasimba asidhi cationic exchanges. Ichi chinyorwa chinoshandisa bacterial cellulose seyakagadzirwa, synthesizing 2-hydroxyl-3-sulfonic acid-based bacterial cellulose ether, uye inoshandisa orthogonal kuyedza kudzidza ayo akanakisa ekugadzira mamiriro uye 2-hydroxyl-3-sulfa-sulfa sulfa yakagadzirwa pasi pemamiriro aya. Kuchinjana kweasidhi -based gornemine cellulose ether inopa theoretical hwaro hwekushandiswa chaiko kwechinhu.
1. Chikamu chekuedza
1.1 Reagents uye zviridzwa
Bacterial cellulose (self-made), sodium hydroxide, sodium carbonate, sodium bisulfite, dioxane, epichlorohydrin, acetone, ethanol, sodium carbonate, mareagents ari pamusoro ndeekuongorora giredhi.
Incubator / drying box (Shanghai-Heng Technology Co., Ltd.); GQF-1 jet mill (Powder Center, Nanjing University of Science and Technology); Fourier infrared spectrometer (Germany); Agilent AAS-3510 atomic absorption spectrophotometer.
1.2 Kugadzirira kwe2-hydroxy-3-sulfopropyl bacterial cellulose ether
1.2.1 Synthesis ye-cross-linked bacterial cellulose
Wedzera 10g yebacterial cellulose powder, 60mL epichlorohydrin uye 125mL ye2mol.·L-1 NaOH mhinduro mufuraski ine mitsipa mitatu yakashongedzerwa nereflux condenser uye stirrer, kupisa kusvika reflux ye1h, sefa, uye kuyambuka-kugeza neacetone nemvura kune zviri pakati nepakati, uye yakaomeswa pasi pevacuum pa60.°C kuwana muchinjika-wakabatana bhakitiriya cellulose.
1.2.2 Synthesis ye sodium 3-chloro-2 hydroxypropanesulfonate
Wema 104.0gNaHSO3 woinyungudutsa mu200mLH2O, uye ngaizare neSO2 gasi. Kupisa kusvika 70-90°C nekukurudzira, wobva wawedzera 160mL epichlorohydrin ine funnel inodonha, uye ita pa85.°C kwe4h. Iyo reaction product yakanyoroveswa kusvika pazasi 5°C kupenya chigadzirwa, wobva wasvetwa, wogezwa, uye woomeswa kuti uwane chigadzirwa chakacheneruka cheyero. Chigadzirwa chisina kuchena chakadzokororwa ne1: 1 ethanol kuti iwane makristasi machena.
1.2.3 Synthesis ye2-hydroxy-3-sulfopropyl bacterial cellulose ether
Wedzera 2 g ye-cross-linked bacterial cellulose, imwe huwandu hwe3-chloro-2-hydroxypropanesulfonate, 0.7 g ye sodium carbonate, uye 70 mL ye dioxane aqueous solution muflask ine mitsipa mitatu ine reflux condenser uye stirrer, nitrogen Mudziviriro, chengetedza imwe tembiricha uye simbisa kuti iite kweimwe nguva yenguva, sefa, geza neacetone nemvura uchichinja kusarerekera, uye vacuum-oma pa60.°C kuti uwane kuomarara kweyero.
1.3 Kuongororwa kwemaitiro echigadzirwa
FT-IR bvunzo: yakasimba KBr piritsi, bvunzo renji: 500cm-1～4000cm-1.
1.4 Kutemerwa kwekuchinjana huwandu
Tora 1-2g ye2-hydroxy-3-sulfopropyl bacterial cellulose ether, wedzera huwandu hwakakodzera hwemvura yakagayiwa kuti inve, wozoidururira mukoramu yekutsinhana nekukuchidzira, sukurudza nehuwandu hwakakodzera hwemvura yakadirwa, wozoshandisa inenge 100mL 5% Hydrochloric acid sukurudza, dzora kuyerera kwe3mL paminiti. Zvadaro geza nemvura yakadirwa kusvika isingaratidzi acidity payakaedzwa nemethyl orange, wobva wageza ne60mL yesodium chloride ine concentration ye1mol L-1, dzora kuyerera kweinenge 3mL/min, uye unganidza tsvina ine Erlenmeyer flask. Zvadaro geza mbiru ne50-80mL mvura yakasvibiswa. Iyo yakaunganidzwa mhinduro yakaderedzwa ne 0.1mol·L-1 sodium hydroxide standard solution inoshandisa phenolphthalein sechiratidzo, uye nhamba yemamililita e sodium hydroxide yakadyiwa yaiva VNaOH.
2. Migumisiro uye nhaurirano
2.1 Chimiro chechimiro chemuchinjika-wakabatana bhakitiriya cellulose
Nekuda kwekuunzwa kwetsva C-H, iyo muchinjika-yakabatana bhakitiriya cellulose ndeye 2922.98cm-1. Kutambanudzwa kwekudengenyeka kweC-H pachindori cheshuga inowedzerwa, uye hunhu hwekunyura hwepamusoro hwemapoka ehydroxyl pa 1161.76cm-1 uye 1061.58cm-1 ye spectral line a haina kusimba, ari iwo maitiro ekunyudza nhongonya dzemapoka ehydroxyl mu cellulose. Pa 3433.2cm-1, iyo vibrational absorption peak yeiyo yakabatana hydroxyl boka ichiripo, asi hukama hwakasimba hunodzikira, zvichiratidza kuti boka rehydroxyl riri pamhete yeglucoside harina kunyatsotsiviwa.
2.2 Chimiro chechimiro che sodium 3-chloro-2-hydroxypropanesulfonate
3525～3481cm-1 ndiyo inotambanudzira vibrate yemubatanidzwa hydroxyl O-H bond, 2930.96cm-1 ndiyo asymmetric inotambanudza vibration yeC.-H, 2852.69cm ndiyo symmetrical stretching vibration yeC-H, 1227.3cm-1, 1054. 95cm-1 ndiko kudedera kwakatambanudzwa kweS=O, 810.1cm-1 ndiko kudedera kwakatambanudzwa kweCOS, uye 727.4cm-1 ndiko kudedera kweC.-Cl, zvichiratidza kuti chinangwa chigadzirwa chinoumbwa.
2.3 Kuumbwa kwemaitiro e2-hydroxy-3-sulfopropyl bacterial cellulose ether
3431cm-1 ndiyo OH inotambanudza vibration peak, 2917cm-1 ndiyo yakazara CH inotambanudza vibration peak, 1656cm-1 ndiyo CC inotambanudza vibration peak, 1212 ~ 1020cm-1 ndeye -SO2-antisymmetric uye symmetric inotambanudza vibration, 658cm-1. iyo SO bond inotambanudza vibration.
2.4 Kugadziridzwa kwemamiriro ekutanga e2-hydroxy-3-sulfopropyl bhakitiriya cellulose ether
Mukuedza, simba rekutsinhanisa rakashandiswa kuedza kunaka kwe2-hydroxy-3-sulfopropyl bacterial cellulose ether. Huwandu hwe3-chloro-2 hydroxypropanesulfonate sodium yakawedzerwa mukuita, kuwanda kweiyo dioxane aqueous solution, nguva yekuita uye tembiricha yakaita zvinhu zvina uye nhanho nhatu dze orthogonal kuyedza kuongorora mhedzisiro yechinhu chimwe nechimwe pabhakitiriya cellulose xanthate. . Kufurira ester properties.
Orthogonal miedzo inoratidza kuti iyo yakakwana musanganiswa wezvinhu zvina ndeye A2B1C3D. 1 Range yekuongorora inoratidza kuti kupisa kwekuita kune simba guru pane adsorption performance ye 2-hydroxy-3-sulfopropyl cellulose ether, uye huwandu huri 1. 914, hunoteverwa nehuwandu hwenguva, dioxane, uye chiyero chekudya che3. chloro-2 hydroxypropanesulfonate sodium. Kuchinjana kwe2-hydroxy-3-sulfopropyl bacterial cellulose ether yakagadzirirwa pasi pemamiriro ezvinhu akagadziriswa yaiva 0.481mmol / g, iyo yakanga yakakwirira kudarika yakafanana SE-type cellulose yakasimba acid cation kuchinjanisa miti yakashumwa mubhuku rekushandisa.
3. Mhedziso
Nekugadzirisa bhakitiriya cellulose, 2-hydroxy-3-sulfonic acid propyl bacterial cellulose ether yakagadziriswa, uye chimiro chayo chakaonekwa uye kukwanisa kwayo kuchinjana kwakayerwa. Mhedziso dzinotevera dzakatorwa: 1) 2-hydroxy-3 - Iyo yakanyanya kunaka maitiro mamiriro eiyo synthesis yesulfopropyl bacterial cellulose ether ndeiyi: 2g cross-linked bacterial cellulose, 3.5g 3-chloro-2-hydroxypropanesulfonate sodium, 0.7g sodium carbonate uye 7OmI30% dioxane Aqueous solution, reaction pa70°C pasi pe nitrogen kuchengetedzwa kwe1h, 2-hydroxy-3-sulfonic acid propyl bacterial cellulose ether yakagadzirwa pasi pemamiriro ezvinhu aya ane simba rekutsinhanisa; 2) 2-hydroxy-3-sulfonic acid boka Kuchinjana kwepropyl bacterial cellulose ether yakakwirira kudarika iyo yakafanana SE type cellulose yakasimba acid cation exchange resin yakashumwa mubhuku rekushandisa.
Nguva yekutumira: Mar-06-2023