Cellulose ether ndi polymer positi yopangidwa ndi cellulose yachilengedwe monga yaiwisi yosinthira mankhwala. Cellulose ether ndi zochokera ku cellulose wachilengedwe, kupanga kwa cellulose ndi kupanga polymer ndi yosiyana, zinthu zake zoyambirira ndizosiyana ndi cellulose, mankhwala achilengedwe. Chifukwa cha kuchuluka kwa cellulose, celluluse yokha sikutha kuchitira ndi wothandizila. Koma pambuyo mankhwalawa otupa othandizira, magwiridwe olimba kwambiri pakati pa unyolo ndi maunyolo adachotsedwa mu alkali adamasulidwa ku Alkalilose cellulose, ma cellulose em omwe adakuchitirani - kapena gulu.
Mphamvu za cellulose eder zimatengera mtundu, chiwerengero ndi kufalitsa m'malo opezekapo. Gulu la ethel ether ether limatengera mtundu wa mipweya, kuchuluka kwa chikondwerero, kusungunuka komanso ntchito zokhudzana ndi zogwirizana zitha kulembedwa. Malinga ndi mtundu wa magantimita pa ma molecular cheni, imatha kugawidwa mu ether imodzi ndi ether. MC nthawi zambiri imagwiritsidwa ntchito ngati ether imodzi, pomwe hpmc ndi ether yosakaniza. Methyl cellulose ether mc ndi gawo lachilengedwe la glucose pa hydroxyl limasinthidwa ndi fordoxyps (o) hpmmc ndi gawo la hydroxyl ndi gawo wa methoxide m'malo mwake, gawo lina la hydroxypyl yosinthidwa, njira yolumikizira ikhale [CE) 3-Oh.) ndipo ogulitsidwa pamsika.
Kuchokera kusungunuka kumatha kugawidwa mu mtundu wa ionic komanso mtundu wopanda ionic. Madzi osungunuka amadzi opanda main-celluse amapangidwa makamaka ndi alkyl ether ndi hydroxyl alkyl ether ether awiri amitundu. Ionic CMC imagwiritsidwa ntchito makamaka yopanga chotupa, cholembera, chosindikizira, chakudya ndi mafuta a petroleum. Osakhala MC, HPMC, hemac ndi zina zambiri zimagwiritsidwa ntchito pomanga zida, zokutira za latex, mankhwala, chemistry tsiku lililonse. Monga wothandizila kukula, wosunga madzi wosunga madzi, wosuta, wobalalitsa, wopanga makanema.
Cellulose ether ether kusungidwa
Popanga zida zomangira, makamaka matope osakanikirana osakanikirana, cellulose ether imagwira ntchito yosasinthika, makamaka popanga matope apadera (matope osinthika), ndi gawo lofunikira.
Udindo wofunikira wa solweble pa cellulose yam'madzi makamaka mwa matope makamaka ali ndi zochitika zitatu, yachiwiri ndi mphamvu ya matope ndi sitemety, ndipo chachitatu ndi kulumikizana ndi simenti.
Kusintha kwa ma ethel ether, kumadalira pansi kwa hydroscoficity, kapangidwe ka matope, matope amadzimadzi, nthawi yopenda. Kusunga kwamadzi kwa ethel ethembo kumachokera ku sulubility ndi madzinjeme a cellulose e sothese. Ndizodziwika bwino kuti maunyolo a cellulose owoneka bwino, ngakhale ali ndi kuchuluka kwamisiridwe kwambiri oh, ndi okonda madzi chifukwa cha mtundu wawo wa kristalo. Kutha kwa ma hydrobyl kwa magulu a hydroxyl sikukwanira kulipira zomangira zamphamvu za handmolecular ndi van der Waals. Pamene magimiti amayambitsidwa mu ma molecular unyolo, osati ma minito okhaokha owononga unyolo wa hydrogen, komanso magwiridwe antchito a hydchain amawonongeka chifukwa cha maunyolo pakati pa ma unyolo oyandikana nawo. Zokulirapo m'malo owonjezera, kutalika kwambiri pakati pa mamolekyulu ndi. Kuwonongedwa kwakukulu kwa hydrogen compoer, kuchulukitsa kwa cellulose, njira yothetsera cellulose ether kukhala solble, mapangidwe a mafayilo apamwamba. Kutentha kumakwera, hydration kwa polima kumachepetsa ndipo madzi pakati pa maunyolo amachotsedwa. Mphamvu yokhumudwitsa ndiyokwanira, mamolekyulu amayamba kuphatikizika ndipo gel imadumphira mu netiweki zitatu. Zinthu zomwe zikukhudza madzi osungira matope zimaphatikizapo mawonedwe a celdwar, mlingo, tinthu tating'onoting'ono ndi kutentha kwa ntchito.
Kukula kwa ethel ether ether, zabwinobwino magwiridwe antchito, mafayilo a polymer yankho. Kulemera kwa maselo (digiri ya polymerization) ya polymer imatsimikiziridwanso ndi kutalika kwa ma molengila ndi kapangidwe ka chiwerengero cha mitu yosiyanasiyana kumakhudza ma vidiyo. [eta] = km alpha
Makutu a Polymer of Polymer mayankho
M polyme molecular kulemera
α polymer mawonekedwe okhazikika
K isccess Sonyezani bwino
Makutu a polymer yankho limatengera kuchuluka kwa kuchuluka kwa polymer. Mawonekedwe a ma virus a ma cellulose amakhudzana ndi ntchito zosiyanasiyana. Chifukwa chake, ethel cellulose ali ndi mawonekedwe osiyanasiyana a mafayilo, ulamuliro wa Vicce Company umakhalanso chifukwa cha kuwonongeka kwa alkali cellulose, makamaka kuwonongeka kwa cellulose masinsa a cellulose kuti akwaniritse.
Kwa kukula kwa tinthu tating'onoting'ono, ndikulimbikitsa tinthu tambiri, kukonzanso kwamadzi. Tinthu tating'onoting'ono tomwe timakumana ndi ma cellulose tomwe timakumana ndi madzi, pomwepo zimasungunuka ndikukulunga kwa mamolekyudwe amadzi kuti asungunuke, nthawi zina mapangidwe a matope am'madzi kapena abglomerate. Kusungunuka kwa cellulose ether ndi imodzi mwazinthu zomwe zimasankha ma ether ether.
Kukula ndi thixotropy ya cellulose ether
Chinthu chachiwiri cha cellulose ether - kukula kwa cellulose ether dineri, yankho, kutentha, kutentha ndi zina. Katundu wa Societion wa Solution ndi wapadera ku cellulose ya alkyl ndi zotumphukira zake. Makhalidwe ozungulira amakhudzana ndi kuchuluka kwa cholowa m'malo mwake, njira yothetsera mavuto komanso owonjezera. Kwa hydroxyl alkyl osinthidwa, gel katundu umakhudzananso ndi digiri ya hydroxyl alkyl kusintha. Chifukwa chofuna kusamalira ma viscrence yotsika MC ndi HPMC ikhoza kukonzedwa 10% -15% yankho la MC ndi 2% - vpmc amatha kukonzekera 2% Njira yothetsera vuto la cellulose imaphatikizidwanso ndi 1% -2% yankho. Kulemera kwambiri kwa cellulose echin kukula kwa ether, kuchuluka komweko, kulemera kwa mabowo molefulira, [η] (DPN) kuchuluka kwa ma polymerization. Mafuta otsika maselo ochepera ether kuti awonjezere zambiri kuti akwaniritse mawonekedwe akufanizira. Maonekedwe ake samadalira kwambiri kuchuluka kwa misozi, mawonekedwe apamwamba kuti akwaniritse mawonekedwe, kuchuluka komwekofunika kuwonjezera, mafayilo amadalira kukula kwamphamvu. Chifukwa chake, kukwaniritsa kusasinthika kwina, kuchuluka kwa ethel ether ether (kukhazikika kwa njira) ndi kusintha kwa ma Isccess ayenera kutsimikiziridwa. Kutentha kutentha kwa yankho kutsika ndi kuchuluka kwa kuchuluka kwa chidwi, komanso kupanikizika kunachitika kutentha kwa firiji mutatha kukhazikika kwina. HPMC ili ndi miyala yayikulu kwambiri yanyengo.
Kusasinthika kumatha kusinthidwanso posankha kukula kwa tinthu ndi cellulose edzoze madigiri osiyanasiyana. Kusintha komwe kumatchedwa kuti kukhazikitsidwa kwa hydroxyl alkyl gulu lina lazolowa m'malo ena a siketoton kapangidwe ka MC. Mwa kusintha malingaliro ogwirizana a magawo awiri a magawo awiriwo, ndiye kuti, DS ndi MS ndi mfundo zokhudzana ndi memoxy ndi ma hydroxyl. Zosiyanasiyana za ethel ether zimafunikira pakusintha mfundo zamitundu iwiri yamitundu iwiri.
ubale womwe uli pakati pa kusasinthika ndi kusinthana. Mu Chithunzi 5, kuwonjezera kwa cellulose ethel ethel amakhudza kumwa kwamadzi kwa matope ndikusintha kuchuluka kwa madzi ndi simenti, komwe ndi zotsatira zake. Mlingo wapamwamba, kumwa madzi ambiri.
Cellulose eder ogwiritsa ntchito powdery omanga ayenera kusungunuka mwachangu m'madzi ozizira ndikupereka dongosolo lomwe likusinthasintha. Ngati mtengo wopaka utakhalapobe wotalika ndi colloidal ndi gawo logonera kapena losauka.
Palinso ubale wabwino pakati pa simenti osasinthika ndi mlingo wa ethel ether, cellulose ether angakuwonjezereka matope a matope, kuchuluka kwakukulu, zotsatira zake.
Cellulose ether aquehoous yankho ndi mafayilo apamwamba ali ndi thixotropy, yomwe ndi imodzi mwamakhalidwe a cellulose ether ether. Mankhwala am'madzi amtundu wa MC nthawi zambiri amakhala ndi madzi amtundu wa pseudopropric, koma oyenda ku Newtonian pamalo otsika. Pseudoplaty imachulukana ndi kuwonjezeka kwa kuchuluka kwa ma cellulose kapena ether ether ndipo sikuyimira pawokha kwa mtundu ndi digiri. Chifukwa chake, cellulose ed ars, kaya ndi MC, HPMC kapena hemc, nthawi zonse amawonetsa zomwezo ngati kuchuluka kwa zomwe zimachitika komanso kutentha. Kutentha kumawonjezeka, gel yazitsulo kumapangidwa ndi kuyenda kwamtundu wa thixotropic kumachitika. Cellulose eds okhala ndi chidwi chachikulu komanso mawonekedwe otsika otsika ku Vixotropy ngakhale pansi pa kutentha kwa gel. Katunduyu ndi phindu lalikulu pantchito yomanga matope kuti asinthe mayendedwe ake ndi kuwotcha nyumba. Iyenera kufotokozedwa pano kuti kukwera kwa etheluse ether ether, kukweza kwa madzi, koma mamasukidwe apamwamba kwambiri, omwe ali ndi vuto lakelo kukhazikika kwa matope ndi zomanga. Maonekedwe ake, zoonekeratu zotsatira zam'matambo, koma si ubale wofananira. Maonekedwe ena otsika, koma celluse yosinthidwa pokonzanso mphamvu yonyowa ya matope ali ndi luso labwino kwambiri, ndikuwonjezeka kwa mafayilo, cellulose madzi osungidwa bwino bwino.
Post Nthawi: Mar-30-2022