M'matope osakanizika, osakanizika, kuchuluka kwa ethel ether ether ether ali wotsika 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
1. Lingaliro
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.
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. Ndi chinthu chomwe chimapangidwa ndi gawo la gulu la hydroxyl pa unit ndi gulu lina la methoxy ndi gawo lina lokhala ndi gulu la hydroxypyl. Njira yoyesererayo ili [CE) (O) 3-MN) M [THE) T] Th3] Ah vhdroxyethyl exerose exula.
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 m'magulu omanga, mankhwala tsiku lililonse, okhazikika, osokoneza bongo, omwe amawapatsa.
Chachiwiri, kusungidwa kwamadzi kwa ether
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 sungunuka wamadzi wosungunulira wamadzi mu matope makamaka ali ndi magawo atatu, imodzi ndi njira yabwino yopezera ndalama, inayo ndiye chidwi cha matope 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.
Zinthu zomwe zikukhudza madzi osungira matope zimaphatikizapo mawonedwe a celdwause, owonjezera, tinthu tating'onoting'ono komanso kugwiritsa ntchito kutentha kwa:
Kuunika kwa cellulose ether ether, yabwinobwino. Mawonekedwe ndi gawo lofunikira la MC. Pakadali pano, opanga osiyanasiyana a MC amagwiritsa ntchito njira zosiyanasiyana zoyezera mafayilo a MC. Njira zazikuluzi zimadana ndi Rotovisko, Huspler, Ulonda wa Ulonda ndi Brookfield. Pazinthu zomwezo, chidwi cha mafayilo omwe chimayesedwa ndi njira zosiyanasiyana ndizosiyana kwambiri, ndipo ena amakhala ndi kusiyana pang'ono. Chifukwa chake, poyerekeza mawonekedwe, ziyenera kuchitika pakati pa njira zomwezi, kuphatikizapo kutentha, rotor, etc.
Nthawi zambiri, mafakiti apamwamba, abwinobwino amadzisungira madzi. Komabe, mafayilo apamwamba komanso okwera kwambiri olemera a MC, kutsika kolingana mu kusungunuka kwake kumabweretsa zovuta pa mphamvu ndi matope omanga matope. Maonekedwe ake, zoonekeratu kuti zimakula kwambiri patavala matope, koma siyofanana mwachindunji. Matope owoneka bwino, ndiye kuti, pomanga, amawonetsedwa ngati kumamatira ku starpiper ndi kutsatira kwakukulu kwa gawo lapansi. Koma sizothandiza kukulitsa mphamvu ya matonthozo onyowa. Pakumanga, magwiridwe antchito a Anti-Anti-sag sizachidziwikire. M'malo mwake, sing'anga zina zapakati komanso zochepa koma kusinthidwa methyl cellose celluse kukhala ndi ntchito yabwino kwambiri pokonzanso mphamvu ya matope onyowa.
Kuchuluka kwa cellulose ether ether wowonjezera matope, kukonzanso magwiridwe antchito, komanso kuwoneka bwino, zabwino zomwe zimasungidwa bwino.
Ponena za tinthu tating'onoting'ono, ndimalimbikitsa tinthu tating'onoting'ono, kusungirako kwamadzi. Zitafika zambiri za ma cellulose ether ether amalumikizana ndi madzi, malowo amasungunuka ndipo amapanga gel kuti mukulungitse mamolekyulu amadzi kuti asalowe pansi. Nthawi zina sizingafanane mosiyanasiyana ndikusungunuka ngakhale poyambitsa kwa nthawi yayitali, ndikupanga njira yopingasa kapena yovuta. Imakhudza kwambiri kusungira kwamadzi kwa maselo a cellulose, ndipo solobose ndi imodzi mwazinthu zomwe zimasankha cellulose ether ether ether ether.
Ubwino ndi mndandanda wofunikira wa methyl cellulose ether. MC yogwiritsa ntchito matope a ufa imafunikira kuti ikhale ufa, wokhala ndi madzi ochepa, ndipo zabwino zimafunikiranso 20% ~ 60% ya kukula kwa tinthu tochepa 63um. Ubwino umakhudza kusungunuka kwa methyl cellulose ether. Coarsing MC nthawi zambiri amakhala granular, ndipo ndikosavuta kusungunuka m'madzi popanda kuphatikizika, koma kuchuluka kwa chilengedwe ndiodekha kwambiri, kotero sioyenera kugwiritsa ntchito matope a ufa wa ufa. Mu matope a ufa wa ufa, MC imabalalitsidwa pakati pa zida zophatikizira monga kuphatikizika, fillet yabwino kwambiri ndi simenti, ndipo ufa wokwanira umatha kupewa methyl celluuse posakanikirana ndi madzi. MC ikawonjezeredwa ndi madzi kuti isungunuke, ndizovuta kwambiri kufalitsa ndikusungunuka.
Kuchita bwino kwa MC sikungowononga kokha, komanso kumachepetsa mphamvu zakomweko kwa matope. Pamene matope owuma a ufa amaziika pamalo akuluakulu, liwiro la matope owuma a ufa lidzachepetsedwa kwambiri, ndipo ming'alu imawoneka chifukwa cha nthawi zosiyanasiyana. Chifukwa cha matope owombera ndi ntchito yomanga makina, kufunikira kwa kukoma bwino kumakhala kokwera chifukwa cha nthawi yofupikira.
Chisangalalo cha MCnso chimakhudzanso madzi ake. Nthawi zambiri, pa cellose cellulose etchese yofananira koma njira zosiyanasiyana, pansi pa zowonjezera zomwezo, Fluder the ndulu yabwino yosungirako madzi.
Kusunga kwamadzi kwa MC kumakhudzananso ndi kutentha komwe kumagwiritsidwa ntchito, ndipo madzi osungira madzi a methyl cellulose ethel ethel cellulose ether amachepetsa ndi kuchuluka kwa kutentha. Komabe, pamalingaliro enieni, matope owuma nthawi zambiri amagwiritsidwa ntchito kutentha kwambiri (malo oposa 40) m'malo ambiri, omwe nthawi zambiri amathandizira kukongoletsa simenti komanso kuuma kwa matope a ufa. Kuchepa kwa kuchuluka kwa madzi kumadzetsa kumverera kowonekeratu kuti kugwirira ntchito komanso kusokonekera komwe kumakhudzidwa, ndipo ndizosavuta kuti muchepetse zinthu za kutentha pansi pa izi.
Ngakhale methyl hydrothyl cellulose embil owonjezera pano akuwonekera pamaso paukadaulo, kudalira kwawo kumapangitsabe kufooketsa matope a ufa wa ufa. Ngakhale kuchuluka kwa methyl hydrothyl cellulose kumachulukitsa (chiilimwe cha chilimwe), kugwirira ntchito komanso kusokonekera komanso kusokoneza zosowa zomwe mungagwiritse ntchito. Mwa chithandizo china chapadera pa MC, monga kuwonjezera kuchuluka kwa chikondwerero, etc.
3. Kukula ndi thixotropy ya cellulose ether
Kukula ndi thixotropy ya cellulose ether: ntchito yachiwiri ya cellulose ether-kukula kwa polymerization ya ethel ethel ethel ethel ethel ethel ethel ethel ethel ethel ethel ethel ethel ethel ethel ethel ethel ethel ethel ethel ethel ethel ethel ethel ethel ethel ethel ethel ethel ethel ethel ethel, yankho ndi zina. Katundu wolumikizidwayo ndi wapadera ku cellulose ya alkyl ndi zotumphukira zake. Kuchuluka kwa milita kumakhudzana ndi kuchuluka kwa malo olowa m'malo mwake, yankho ndi zowonjezera. Kwa hydroxyalyl osinthidwa, gel katundu wa gel omwe amakhudzananso ndi kuchuluka kwa hydroxyalkyl. Pa ma viscrence otsika MC ndi HPMC, 10% -15% yankho la MC ndi HPMC ikhoza kukonzedwa 5% - pomwe ma viscker MC ndi 3% amangokonzekera, ndipo nthawi zambiri Gulu la mafayilo la cellulose ether limaphatikizidwanso ndi 1% -2% yankho.
Kulemera kwambiri kwa cellulose etheulose ether ali ndi luso lalikulu. Mu yankho lomweli, yankho lomweli ndi miyala yosiyanasiyana imakhala ndi ma viscosies osiyanasiyana. Digirii. Ma Isccience amangotha kugwiritsa ntchito kuchuluka kwa ma celluur ether ether. Mavinyewa ake alibe kudalira pang'ono mtengo wometa ubweya, ndipo ma virus okwera amafika ku Viccect, ndipo kuchuluka kowonjezereka ndikochepa, ndipo mafayilo amatengera luso la kukula. Chifukwa chake, kukwaniritsa zosasinthika, kuchuluka kwa ethel ether ether (kukhazikika kwa yankho) ndi njira ya kusintha kwa iyenera kutsimikiziridwa. Kutentha kwa gel kulimanso kumachepetsa chozungulira ndikuwonjezeka kwa kuchuluka kwa njira yothetsera vutoli, ndipo ma gels firiji mukamaliza ndende inayake. Kukhazikika kwa HPMC ndikokwera kwambiri kutentha.
Kusasinthika kumathanso kusinthidwa ndikusankha kukula kwa tinthu ndikusankha cellulose eders eders osiyanasiyana osinthika. Kusintha komwe kumatchedwa ndikuyambitsa digiri ina ya migodi ya hydroxyaxyalkyll pamtundu wa mafupa a MC. Mwa kusintha malingaliro ogwirizana a magawo awiri a magawo awiriwo, ndiye kuti, ma DS ndi MS ndi mfundo zokhudzana ndi methoxy ndi ma hydroxyaxyalyl omwe nthawi zambiri amati. Zofunikira zogwirira ntchito zamagetsi ether ether zimatha kusinthidwa posintha malingaliro a wachibale wa magawo awiri.
Chiyanjano pakati pa kusasinthika ndi kusintha: kuwonjezera kwa ma cellulose ethel ethel ethel amakhudza kumwa madzi am'madzi, simenti ndi mphamvu yokulirapo, kuchuluka kwa madziwo.
Cellulose eder omwe amagwiritsidwa ntchito mu maluwa omanga ufa ayenera kusungunuka mwachangu m'madzi ozizira ndikupereka kusasinthika koyenera kwa dongosolo. Ngati atapatsidwa mtengo wina wamphongo, imakhalabe ndi chipika chodalirika komanso cocloidal.
Palinso ubale wabwino pakati pa kusasinthika kwa sitementi ya simenti ndi mlingo wa ether ether. Cellulose ether ingakulitse kwambiri matope a matope. Kukulira mlingo, zoonekeratu zotsatira zake. Mawonekedwe apamwamba kwambiri cellulose a mu chixotropy ali ndi hixotropy, yomwe ilinso chinthu chachikulu cha cellulose ether ether. Mankhwala am'madzi amtundu wa MC nthawi zambiri amakhala ndi madzi amtundu wa pseudopropropic komanso masamba a Newtonian pamtunda wotsika. Pseudoplation imachulukana ndi kulemera kwa maselo kapena ndende ya ethel ether, mosasamala mtundu wa gawo la mpweya wolowa m'malo mwake. Chifukwa chake, cellulose edi ya kalasi ya ma visce yomwe ija, ziribe kanthu mc, hpmc, hemc, nthawi zonse imawonetsa zomwezo ngati kuchuluka kwa zomwe zimachitika nthawi zonse.
Ma gels amapangidwa kuti kutentha kukuwukitsidwa, komanso kutulutsa kambiriko kwambiri. Kukhazikika kwambiri komanso kutsika kwa ma vinclose yotsika cellulose kumawonetsa thixotropy ngakhale pansi pa kutentha kwa gel. Katunduyu ndi phindu lalikulu pakusintha kwa malo opangira matope omanga. Iyenera kufotokozedwa pano kuti kukwera kwa ethel ethel ethel ether, mamasukidwe abwinowo, koma okwera kwambiri olemera kwambiri, ndipo amachepetsa mosiyanasiyana, omwe ali ndi mavuto ake pazachilengedwe komanso zomanga. Maonekedwe ake, zoonekeratu kuti zimakula kwambiri patavala matope, koma siyofanana. Ena mwapakatikati komanso otsika, koma ma celluse osinthidwa ali ndi magwiridwe antchito abwino pokonzanso mphamvu ya matope onyowa. Ndi kuwonjezeka kwa mafakiti, kusungira kwamadzi kwa ethel ethel. 4. Kubweza kwa cellulose ether
Kubwezera kwa cellulose ether: ntchito yachitatu ya ethel ether ndikuzengereza kuchuluka kwa simenti. Cellulose ether amavala matope ndi zinthu zosiyanasiyana zopindulitsa, komanso amachepetsa kutentha koyambirira kwa simenti ndikuchepetsa mphamvu ya simenti. Izi ndizosavuta kugwiritsa ntchito matope m'malo ozizira. Kubweza kumeneku kumachitika chifukwa cha Adsorption ya ma cellulose ether mamolekyulu pazinthu zopatsa mphamvu monga Chs ndi Ca (O) 2. Chifukwa chakuwonjezereka kwa mawonekedwe a core, cellulose emeulse yochepetsera kusuntha kwa ma ions mu yankho, poyerekeza ndi hydration njira.
Post Nthawi: Feb-04-2023