Shan cellulose na kwayan cuta a matsayin albarkatun kasa, hada 2-hydroxy-3-sulfate propyate cellulose ether. Infrared spectrometer yana nazarin tsarin samfurin. Mafi kyawun yanayin tsari don haɗuwa da tushe na cellulose ether na kwayan cuta. Sakamakon ya nuna cewa ƙarfin musayar 2-hydroxy-3-sulfonic acid na tushen propyate kwayan ether da aka haɗa a ƙarƙashin yanayin ingantawa shine 0.481mmol / g.
Mahimman kalmomi: cellulose na kwayan cuta; 2-hydroxyl-3-sulfonic acid na tushen gornemine cellulose ether; musayar iya aiki
Microbial roba kwayan cellulose yayi kama da shuka cellulose a cikin sinadaran abun da ke ciki da kuma kwayoyin tsarin. Yana da madaidaiciyar polysaccharide da aka haɗa ta D-pyrarot glucose tare daβ-1, 4-glycoside bond. Idan aka kwatanta da shuke-shuke cellulose, kwayan cellulose yana da mafi kyau hali. Yana da ultra-micro fiber net wanda ya ƙunshi ultra-micro fibers. Ya wanzu a cikin sigar cellulose mai tsabta kuma yana da ayyuka na musamman. An yi amfani da abubuwan da ake amfani da su na kayan aikin motsa jiki da kuma hakar mai.
2-hydroxyl-3-sulfonate salula cellulose ether ne mai muhimmanci cellulose samu wanda za a iya yi da high ruwa sha kayan. Hakanan za'a iya amfani dashi azaman tsattsauran tsafta don tallan ion ƙarfe mai nauyi da furotin azaman cation. Feng Qingqin, Jie Zhefeng da sauran cellulose da ake amfani da su a cikin shinkafa harsashi masara bambaro don shirya 2-hydroxyl-3-sulfate cellulose ether karfi acid cationic musayar. Wannan labarin yana amfani da cellulose na kwayan cuta a matsayin kayan albarkatun kasa, yana haɗa 2-hydroxyl-3-sulfonic acid na tushen kwayoyin cellulose ether, kuma yana amfani da gwaje-gwaje na orthogonal don nazarin mafi kyawun yanayi na roba da 2-hydroxyl-3-sulfa-sulfa sulfa da aka shirya a karkashin wannan yanayin. Ƙarfin musanya na acid-based gornemine cellulose ether yana ba da tushen ka'idar don ainihin aikace-aikacen kayan.
1. Bangaren gwaji
1.1 Reagents da kayan aiki
Bacterial cellulose (kai), sodium hydroxide, sodium carbonate, sodium bisulfite, dioxane, epichlorohydrin, acetone, ethanol, sodium carbonate, sama reagents ne na nazari sa.
Akwatin incubator / bushewa (Shanghai-Heng Technology Co., Ltd.); GQF-1 jet niƙa (Cibiyar Foda, Jami'ar Kimiyya da Fasaha ta Nanjing); Fourier infrared spectrometer (Jamus); Agilent AAS-3510 atomic sha spectrophotometer.
1.2 Shiri na 2-hydroxy-3-sulfopropyl kwayoyin cellulose ether
1.2.1 Haɗin gwiwar cellulose na kwayan cuta mai alaƙa da giciye
Add 10g na kwayoyin cellulose foda, 60ml na epichlorohydrin da 125ml na 2mol.·Maganin L-1 NaOH a cikin flask mai wuyan wuya uku sanye take da reflux condenser da mai motsawa, zafi don reflux don 1h, tacewa, da giciye-wanke tare da acetone da ruwa zuwa matsakaicin kaddarorin, kuma bushe a ƙarƙashin injin a 60°C don samun cellulose na kwayan cuta mai haɗe-haɗe.
1.2.2 Maganar sodium 3-chloro-2 hydroxypropanesulfonate
Auna 104.0gNaHSO3 kuma a narkar da shi a cikin 200mLH2O, kuma bari a cika shi da SO2 gas. Yi zafi har zuwa 70-90°C tare da motsawa, sa'an nan kuma ƙara 160mL epichlorohydrin tare da faduwa mazugi, sa'an nan kuma mayar da martani a 85.°C da 4h. An sanyaya samfurin amsawa zuwa ƙasa da 5°C don yin crystallize samfurin, sannan a tsotse tsotsa, wanke, da bushewa don samun samfurin ɗanyen kodadde rawaya. An sake gyara ɗanyen samfurin tare da 1: 1 ethanol don samun farin lu'ulu'u.
1.2.3 Haɗin gwiwar 2-hydroxy-3-sulfopropyl kwayar cutar cellulose ether
Ƙara 2 g na cellulose na ƙwayoyin cuta, wani adadin 3-chloro-2-hydroxypropanesulfonate, 0.7 g na sodium carbonate, da 70 ml na maganin ruwa na dioxane a cikin flask mai wuya uku sanye take da reflux condenser da mai motsawa. nitrogen Karkashin kariya, sarrafa wani zafin jiki da motsawa don amsawa na wani ɗan lokaci, tace, wanke da acetone da ruwa zuwa tsaka tsaki, da bushe-bushe a 60.°C don samun m rawaya mai haske.
1.3 Binciken tsarin samfur
Gwajin FT-IR: kwamfutar hannu mai ƙarfi KBr, kewayon gwaji: 500cm-1～4000 cm - 1.
1.4 Ƙaddamar da ƙarfin musayar
Ɗauki 1-2g na 2-hydroxy-3-sulfopropyl bakteriya cellulose ether, ƙara daidai adadin distilled ruwa don jiƙa, sa'an nan kuma zuba shi a cikin ginshiƙi musayar tare da motsawa, kurkura tare da daidai adadin distilled ruwa, sa'an nan kuma amfani da game da 100mL 5% Hydrochloric acid kurkura, sarrafa adadin kwarara na 3ml a minti daya. Sannan a wanke da ruwa mai narkewa har sai bai nuna acidity ba idan an gwada shi da methyl orange, sannan a ɗaura shi da kusan 60mL na sodium chloride tare da ma'aunin 1mol L-1, sarrafa adadin ruwa a kusan 3mL/min, sannan a tattara magudanar tare da Erlenmeyer flask. Sa'an nan kuma wanke ginshiƙi tare da ruwa mai tsabta 50-80mL. Maganin da aka tattara an daidaita shi da 0.1mol·L-1 sodium hydroxide daidaitaccen bayani ta amfani da phenolphthalein a matsayin mai nuna alama, kuma adadin milliliters na sodium hydroxide da aka cinye shine VNaOH.
2. Sakamako da tattaunawa
2.1 Siffar sifa na cellulose na kwayan cuta mai alaƙa da giciye
Sakamakon gabatar da sabon C-H, cellulose na kwayan cuta mai haɗin giciye shine 2922.98cm-1. Miƙewar girgizawar C-H akan zoben sukari yana haɓaka, kuma halayen haɓakar kololuwar ƙungiyoyin hydroxyl a 1161.76cm-1 da 1061.58cm-1 na layin bakan a sun raunana, waɗanda sune halayen kololuwar ƙungiyoyin hydroxyl a cikin cellulose. A 3433.2cm-1, kololuwar jujjuyawa na rukunin hydroxyl masu alaƙa har yanzu yana wanzu, amma ƙarfin dangi yana raguwa, yana nuna cewa rukunin hydroxyl akan zoben glucoside ba a canza shi gaba ɗaya ba.
2.2 Siffar sifa na sodium 3-chloro-2-hydroxypropanesulfonate
3525～3481cm-1 shine miƙewar girgiza ƙungiyar hydroxyl O-H bond, 2930.96cm-1 shine asymmetric mikewa na C-H, 2852.69cm shine daidaitaccen girgizar girgizar C-H, 1227.3cm-1, 1054. 95cm-1 shine miƙewar girgizar S = O, 810.1cm-1 shine girgizawar COS, kuma 727.4cm-1 shine girgizawar C.-Cl, yana nuna cewa samfurin da aka yi niyya an ƙirƙira shi.
2.3 Siffar tsarin 2-hydroxy-3-sulfopropyl kwayar cellulose ether
3431cm-1 ne OH mikewa ganiya, 2917cm-1 ne cikakken CH mikewa ganiya, 1656cm-1 ne CC mikewa ganiya, 1212 ~ 1020cm-1 ne -SO2-antisymmetric da simmetric mikewa vibration, 658cm-1 ne. da SO bond mikewa vibration.
2.4 Inganta yanayin kira don 2-hydroxy-3-sulfopropyl kwayoyin cellulose ether
A cikin gwajin, an yi amfani da ƙarfin musayar don gwada ingancin 2-hydroxy-3-sulfopropyl kwayoyin cellulose ether. Adadin 3-chloro-2 hydroxypropanesulfonate sodium da aka kara a cikin amsawa, ƙaddamar da maganin ruwa na dioxane, lokacin amsawa da zafin jiki sun yi abubuwa hudu da matakai uku na gwaje-gwajen orthogonal don nazarin tasirin kowane factor akan kwayar cellulose xanthate. . Tasirin kaddarorin ester.
Gwaje-gwajen orthogonal sun nuna cewa mafi kyawun haɗin abubuwan 4 shine A2B1C3D. 1 Range bincike ya nuna cewa yawan zafin jiki na amsawa yana da tasiri mafi girma akan aikin adsorption na 2-hydroxy-3-sulfopropyl cellulose ether, kuma kewayon shine 1. 914, biye da ƙaddamar da lokaci, dioxane, da adadin ciyarwa na 3. - chloro-2 hydroxypropanesulfonate sodium. Ƙarfin musayar 2-hydroxy-3-sulfopropyl cellulose ether na ƙwayoyin cuta wanda aka shirya a ƙarƙashin ingantattun yanayi shine 0.481mmol/g, wanda ya fi na irin SE-type cellulose ƙarfi acid musayar bishiyoyin da aka ruwaito a cikin littafin.
3. Kammalawa
Ta hanyar gyaggyara cellulose na kwayan cuta, 2-hydroxy-3-sulfonic acid propyl bakteriyar cellulose ether an haɗa shi, kuma an kwatanta tsarinsa kuma an auna ƙarfin musanya. An zana waɗannan shawarwari masu zuwa: 1) 2-hydroxy-3 - Mafi kyawun yanayin tsari don haɗuwa da ƙwayoyin ƙwayoyin cuta na cellulose ether sulfopropyl sune: 2g giciye-haɗe da kwayar cutar cellulose, 3.5g 3-chloro-2-hydroxypropanesulfonate sodium, 0.7g sodium carbonate. da 7OmI30% dioxane Aqueous bayani, amsawa a 70°C a ƙarƙashin kariya ta nitrogen don 1h, 2-hydroxy-3-sulfonic acid propyl kwayoyin cellulose ether da aka shirya a ƙarƙashin wannan yanayin yana da ƙarfin musayar mafi girma; 2) Ƙungiyar 2-hydroxy-3-sulfonic acid Ƙarfin musayar propyl cellulose ether ya fi girma fiye da irin wannan nau'in SE cellulose mai ƙarfi acid musayar resin da aka ruwaito a cikin littafin jagora.
Lokacin aikawa: Maris-06-2023