Cellulose ether ndi polymer yopanga policle yopangidwa kuchokera ku cellulose yachilengedwe kudzera mu kusintha mankhwala. Cellulose ether ndi zochokera ku cellulose yachilengedwe. Kupanga kwa cellulose ether ndi kosiyana ndi opanga ma polima. Zida zake zoyambirira ndizopenchera, kuphatikiza kwachilengedwe kwa polymer. Chifukwa cha kuchuluka kwa kapangidwe ka cellulose, cellulose yomwe ilibe mphamvu yokhudzana ndi othandizira. Komabe, pambuyo pa mankhwalawa a wothandizira wazotupa, maunyolo a hydrogen pakati pa unyolo wazomwe unyolowo ndi maunyolowo adawonongedwa, ndipo kutulutsidwa kwa Hydroxyyl kumakhala kwa cellulose ya alkali. Pezani ether ether.
Pokonzekera matope, kuchuluka kwa ethel ether ether ether kuli kotsika kwambiri, koma kumatha kusintha kwambiri matope onyowa, ndipo ndi chowonjezera chomwe chimakhudza matope omanga. Kusankhidwa koyenera kwa cellulose kukhala ndi mitundu yosiyanasiyana, ma viscosies osiyanasiyana, kukula kwa tinthu tating'onoting'ono, madigiri osiyanasiyana owonjezeredwa ndikuthandizira kusintha kwa matope a ufa wa ufa. Pakadali pano, matope ambiri ndi matope okhala ndi magwiridwe antchito osavomerezeka, ndipo madziwo amalekanitsa atangoimirira.
Kusungidwa kwamadzi ndikofunikira pakugwiritsa ntchito methyl cellulose ether ether, ndipo ndi ntchito yomwe ambiri amawuma opanga matope, makamaka iwo akumwera kum'mwera ndi kutentha kwakukulu, samalani. Zinthu zomwe zikukhudza madzi osungira madzi osakaniza zimaphatikizapo kuchuluka kwa MC
Mphamvu za cellulose eder zimatengera mtundu, chiwerengero ndi kufalitsa m'malo opezekapo. Kugawika kwa cellulose kumachitikanso pamtundu wa mipweya yambiri, digiri ya kukongoletsa, kusungunuka komanso ntchito zokhudzana ndi ntchito. Malinga ndi mtundu wa magalamure pa ma molecular cheni, imatha kugawidwa mu monoether ndi osakaniza. MC nthawi zambiri timagwiritsa ntchito ndi monoether, ndipo HPMC imasakaniza ether. Methyl cellulose ether mc ndiye chinthucho pambuyo pa gulu la hydroxyl pa gawo la glucose la cellulose yazachilengedwe yagawidwa ndi methoxy. Njira yoyendera ndi [coh ,o2 (o) 3-h (och3) h] x. Gawo la Gulu la Hydroxyl pa unit lagawidwa ndi gulu la methoxypropyl, ndipo gawo linalo limasinthidwa ndi mtundu wa hydroxypyl, for plamula ndi [C6h7o2 (OC3K (OC2] N] N] X ethyl methyl cellulose ether ether, awa ndi mitundu yayikulu yomwe imagwiritsidwa ntchito komanso yogulitsidwa pamsika.
Potengera kusungunuka, imatha kugawidwa mu ionic komanso yosakhala ionic. Madzi osungunuka amadzi osakhala a celluse a ionic amakhala ndi mndandanda wa ma alkyl angapo a ma alkyl, ndi hydroxyalkyl et. Ionic CMC imagwiritsidwa ntchito makamaka popanga zotupa, kusindikiza mwadongosolo ndi kupanikizika ndi kufufuza kwamafuta. Opanda MC, HPMC, hemoc, etc. amagwiritsidwa ntchito makamaka popanga, mankhwala tsiku lililonse, mankhwala osungirako, osokoneza bongo, osokoneza bongo.
Kusunga kwamadzi kwa ethel ether: Popanga ziphato zomangira, makamaka ether ether ether, celluluse ether element upangiri wosasinthika, makamaka popanga matope apadera (matope osinthika), chofunikira komanso chofunikira. Udindo wofunikira wa kusungunuka wamadzi wosungunulira madzi mu matope makamaka ali ndi zinthu zitatu:
1.
2. Zotsatira za kuchuluka kwa matope ndi thixotropy
3. Kulumikizana ndi simenti.
Madzi osunga ma cellulose ethel ether amatengera madzi ophatikizika, kapangidwe ka matope, makulidwe a matope, kufunidwa kwamadzi kwa matope. Kusunga kwamadzi kwa maselo a cellulose kumachokera ku sulubility ndi madzinjeme a cellulose e okha. Monga tonse tikudziwa, ngakhale kuti ma cellulose a cellulose amakhala ndi mitundu yambiri yamagulu ambiri, samasungunuka m'madzi, chifukwa mawonekedwe a cellulose ali ndi crystality wamkulu. Kutha kwa ma hydrobyl kwa magulu a hydroxyl sikukwanira kuphimba maukonde olimba ndi van Der Waals pakati pa mamolekyulu. Chifukwa chake, zimangotupa koma sizisungunuka m'madzi. Pamene gawo lazolowera limayambitsidwa mu mawonekedwe a ma molecular, osati gawo lokhalo lomwe limawononga unyolo wa hydrogen, komanso mgwirizano wa hydchain umawonongedwa chifukwa cha ukwati wapafupi ndi maunyolo oyandikana nawo. Kukula m'malo mwake, kwakukulu pakati pa mamolekyulu. Chachikulu mtunda. Zotsatira zazikulu zakuwononga magwiridwe antchito a hydrogen, ma cellulose amasungunuka osungunuka madzi pachipindachi atayamba kukula ndi yankho lolowa, ndikupanga yankho lalitali. Kutentha kukakwera, hydration kwa polima kumachepetsa, ndipo madzi pakati pa maunyolo amachotsedwa kunja. Mphamvu zokwanira zikakhala zokwanira, mamolekyulu amayamba kuphatikizika, ndikupanga mawonekedwe atatu a gel osakaniza ndikupindidwa.
Post Nthawi: Desic-06-2022