Kakaretso:Cellulose ether ke motsoako o ka sehloohong oa seretse se seng se kopantsoe.Mefuta le litšobotsi tsa sebopeho sa cellulose ether lia hlahisoa, 'me hydroxypropyl methylcellulose ether (HPMC) e khethoa e le tlatsetso ea ho ithuta ka mokhoa o hlophisitsoeng tšusumetso ea thepa e fapaneng ea seretse..Liphuputso li bontšitse hore: HPMC e ka ntlafatsa haholo ho boloka metsi a seretse, 'me e na le phello ea ho fokotsa metsi.Ka nako e ts'oanang, e ka boela ea fokotsa bongata ba motsoako oa seretse, ea lelefatsa nako ea ho beha seretse, 'me ea fokotsa matla a flexural le a hatellang a seretse.
Mantsoe a bohlokoa:seretse se itokisitseng;hydroxypropyl methylcellulose ether (HPMC);tshebetso
0.Selelekela
Seretse ke se seng sa lisebelisoa tse sebelisoang haholo indastering ea kaho.Ka nts'etsopele ea mahlale a lintho tse bonahalang le ntlafatso ea litlhoko tsa batho bakeng sa boleng ba moaho, seretse se tsoetse pele butle-butle ho ea khoebong joalo ka ho khothaletsa le nts'etsopele ea konkreite e tsoakiloeng.Ha ho bapisoa le seretse se lokiselitsoeng ke theknoloji ea khale, seretse se rekisoang se na le melemo e mengata e totobetseng: (a) boleng bo phahameng ba sehlahisoa;(b) bokgoni bo phahameng ba tlhahiso;(c) tšilafalo e fokolang ea tikoloho le e loketseng kaho e tsoetseng pele.Hajoale, Guangzhou, Shanghai, Beijing le litoropo tse ling tsa China li khothalelitse seretse se tsoakiloeng, 'me litekanyetso tse amehang tsa indasteri le maemo a naha li se li fanoe kapa li tla fanoa haufinyane.
Ho ea ka pono ea sebopeho, phapang e kholo pakeng tsa seretse se seng se tsoakane le seretse sa setso ke ho eketsoa ha metsoako ea lik'hemik'hale, eo har'a eona cellulose ether e leng motsoako o sebelisoang ka ho fetisisa oa lik'hemik'hale.Cellulose ether hangata e sebelisoa e le ntho e bolokang metsi.Sepheo ke ho ntlafatsa ts'ebetso ea seretse se seng se kopantsoe.Palo ea cellulose ether e nyane, empa e na le tšusumetso e kholo ts'ebetsong ea seretse.Ke tlatsetso e kholo e amang ts'ebetso ea kaho ea seretse.Ka hona, kutloisiso e eketsehileng ea phello ea mefuta le litšobotsi tsa sebopeho sa ether ea cellulose ts'ebetsong ea seretse sa samente e tla thusa ho khetha le ho sebelisa cellulose ether ka nepo le ho netefatsa ts'ebetso e tsitsitseng ea seretse.
1. Mefuta le litšobotsi tsa sebopeho sa cellulose ethers
Cellulose ether ke thepa ea polymer e qhibilihang ka metsing, e sebelisoang ho tloha selulose ea tlhaho ka ho qhibiliha ha alkali, karabelo ea grafting (etherification), ho hlatsoa, ho omisa, ho sila le mekhoa e meng.Li-cellulose ethers li arotsoe ka ionic le nonionic, 'me cellulose ea ionic e na le letsoai la carboxymethyl cellulose.Nonionic cellulose e kenyelletsa hydroxyethyl cellulose ether, hydroxypropyl methyl cellulose ether, methyl cellulose ether le tse ling tse joalo.Hobane ionic cellulose ether (carboxymethyl cellulose salt) ha e tsitsa ka pel'a li-ion tsa calcium, ha e sebelisoe ka seoelo lihlahisoa tse omeletseng tsa phofo tse nang le samente, lime e entsoeng ka slaked le lisebelisoa tse ling tsa samente.Li-cellulose ethers tse sebelisoang ka seretse sa phofo e omileng ke haholo-holo hydroxyethyl methyl cellulose ether (HEMC) le hydroxypropyl methyl cellulose ether (HPMC), e ikarabellang ho feta 90% ea karolo ea 'maraka.
HPMC e thehiloe ka karabelo ea etherification ea kalafo ea cellulose alkali activation ka etherification agent methyl chloride le propylene oxide.Karabelong ea etherification, sehlopha sa hydroxyl se molek'huleng ea selulose se nkeloa sebaka ke methoxy) le hydroxypropyl ho theha HPMC.Palo ea lihlopha tse nketsoeng sebaka ke sehlopha sa hydroxyl ho molek'hule ea selulose e ka hlahisoa ka tekanyo ea etherification (hape e bitsoa tekanyo ea ho fetola).Ether ea HPMC Tekanyo ea phetoho ea lik'hemik'hale e pakeng tsa 12 le 15. Ka hona, ho na le lihlopha tsa bohlokoa tse kang hydroxyl (-OH), ether bond (-o-) le lesale la anhydroglucose mohahong oa HPMC, 'me lihlopha tsena li na le tse itseng. tšusumetso ts'ebetsong ea seretse.
2. Phello ea cellulose ether ho thepa ea seretse sa samente
2.1 Lisebelisoa tse tala bakeng sa tlhahlobo
Cellulose ether: e hlahisoa ke Luzhou Hercules Tianpu Chemical Co., Ltd., viscosity: 75000;
Samente: Conch brand 32.5 grade composite samente;lehlabathe: lehlabathe le mahareng;fofa molora: sehlopha sa II.
2.2 Liphetho tsa liteko
2.2.1 Phello ea ho fokotsa metsi ea cellulose ether
Ho tloha kamano pakeng tsa ho tsitsa ha seretse le litaba tsa cellulose ether tlas'a tekanyo e tšoanang ea ho kopanya, ho ka bonoa hore ho lumellana ha seretse ho eketseha butle-butle ka keketseho ea litaba tsa cellulose ether.Ha tekanyo e le 0,3 ‰, ho lumellana ha seretse ho ka ba 50% ho feta ho feta ntle le ho kopanya, e leng se bontšang hore cellulose ether e ka ntlafatsa haholo ho sebetsa ha seretse.Ha palo ea cellulose ether e eketseha, tšebeliso ea metsi e ka fokotseha butle-butle.Ho ka nkoa hore cellulose ether e na le phello e itseng ea ho fokotsa metsi.
2.2.2 Ho boloka metsi
Ho boloka metsi a seretse ho bolela bokhoni ba seretse ho boloka metsi, hape ke index ea ts'ebetso ea ho lekanya botsitso ba likarolo tse ka hare tsa seretse se secha sa samente nakong ea lipalangoang le ho paka.Palo ea metsi e ka lekanyetsoa ka matšoao a mabeli: tekanyo ea stratification le sekhahla sa ho boloka metsi, empa ka lebaka la ho eketsoa ha sesebelisoa sa ho boloka metsi, ho bolokoa ha metsi a seretse se seng se kopantsoeng ho ntlafalitsoe haholo, 'me tekanyo ea stratification ha e na maikutlo a lekaneng. ho bontsha phapang.Teko ea ho boloka metsi ke ho bala sekhahla sa ho boloka metsi ka ho lekanya phetoho ea boima ba pampiri ea sefene pele le ka mor'a hore pampiri ea sefa e kopane le sebaka se boletsoeng sa seretse ka nako e itseng.Ka lebaka la ho kenngoa ha metsi hantle ha pampiri ea sefa, esita le haeba ho boloka metsi a seretse ho phahame, pampiri ea filthara e ntse e ka monya mongobo ka har'a seretse, kahoo.Sekhahla sa ho boloka metsi se ka bonahatsa ka nepo ho bolokoa ha metsi seretseng, ha sekhahla sa ho boloka metsi se phahame, ho boloka metsi ho betere.
Ho na le mekhoa e mengata ea tekheniki ea ho ntlafatsa ho boloka metsi a seretse, empa ho eketsa cellulose ether ke eona tsela e sebetsang ka ho fetisisa.Sebopeho sa cellulose ether se na le li-bond tsa hydroxyl le ether.Liathomo tsa oksijene lihlopheng tsena li amahanngoa le limolek'hule tsa metsi ho theha maqhama a haedrojene.Etsa limolek'hule tsa mahala tsa metsi hore e be metsi a tlamiloeng, e le hore a ka bapala karolo e ntle ho boloka metsi.Ho tloha kamano pakeng tsa tekanyo ea ho boloka metsi ea seretse le litaba tsa cellulose ether, ho ka bonoa hore ka har'a mefuta e mengata ea liteko, tekanyo ea ho boloka metsi ea seretse le litaba tsa cellulose ether li bontša kamano e ntle e lumellanang.Ha litaba tsa cellulose ether li phahame, sekhahla sa ho boloka metsi se eketseha..
2.2.3 Boima ba motsoako oa seretse
Ho ka bonoa ho tloha molao oa phetoho ea segokanyipalo sa motsoako oa seretse o nang le litaba tsa cellulose ether hore letsoalo la motsoako oa seretse le fokotseha butle-butle ka keketseho ea litaba tsa cellulose ether, le letsoalo le metsi la seretse ha litaba li ntse li eketseha. ke 0.3‰o E fokotsehile ka hoo e ka bang 17% (ha e bapisoa le ha ho na motsoako).Ho na le mabaka a mabeli a ho fokotseha ha sekhahla sa seretse: le leng ke phello ea ho kenya moea ea cellulose ether.Ether ea cellulose e na le lihlopha tsa alkyl, tse ka fokotsang matla a holim'a metsi a tharollo ea metsi, 'me li na le phello ea moea-intraining holim'a seretse sa samente, e leng se etsang hore moea oa seretse o eketsehe, le ho tiea ha filimi ea bubble le hona ho phahame ho feta moo. ea li-bubble tsa metsi a hloekileng, 'me ha ho bonolo ho e ntša;ka lehlakoreng le leng, ether ea selulose e atoloha ka mor'a ho monya metsi 'me e nka molumo o itseng, e leng se lekanang le ho eketsa li-pores tse ka hare tsa seretse, kahoo e etsa hore seretse se kopane marotholi a Density.
Phello ea moea ea cellulose ether e ntlafatsa ts'ebetso ea seretse ka lehlakoreng le leng, 'me ka lehlakoreng le leng, ka lebaka la ho eketseha ha moea, sebopeho sa' mele o thata oa lokolloa, o fella ka phello e mpe ea ho fokotseha. thepa ya motjhini joalo ka matla.
2.2.4 Nako ea ho kopanya
Ho tloha kamano pakeng tsa nako ea ho beha seretse le bongata ba ether, ho ka bonoa ka ho hlaka hore cellulose ether e na le phello e fokolang holim'a seretse.Ha tekanyetso e le kholoanyane, phello ea ho lieha e bonahala haholoanyane.
Phello e fokolisang ea cellulose ether e amana haufi-ufi le litšobotsi tsa eona tsa sebopeho.Cellulose ether e boloka sebopeho sa motheo sa selulose, ke hore, sebopeho sa selikalikoe sa anhydroglucose se ntse se le teng ka har'a sebopeho sa molek'hule sa cellulose ether, 'me selikalikoe sa anhydroglucose ke sesosa sa Sehlopha se seholo sa ho lieha ha samente, se ka etsang limolek'hule tsa tsoekere-calcium. lik'hemik'hale (kapa li-complexes) tse nang le li-ion tsa calcium ka har'a samente hydration aqueous solution, e fokotsang khatello ea calcium ion nakong ea ho kenya samente hydration le ho thibela Ca (OH): Le ho thehoa ha kristale ea letsoai la calcium, pula, le ho liehisa ts'ebetso ea samente hydration.
2.2.5 Matla
Ho tloha tšusumetsong ea cellulose ether ka matla a flexural le a hatellang a seretse, ho ka bonoa hore ka keketseho ea litaba tsa cellulose ether, matsatsi a 7 le matsatsi a 28 a matla a ho feto-fetoha le ho hatella a seretse kaofela a bontša mokhoa o theohang.
Lebaka la ho fokotseha ha matla a seretse le ka bakoa ke ho eketseha ha moea, e leng ho eketsang porosity ea seretse se thata le ho etsa hore mohaho o ka hare oa 'mele o thata o theohe.Ka tlhahlobo ea ho fokotseha ha sekhahla sa metsi le matla a hatellang a seretse, ho ka bonoa hore ho na le kamano e ntle pakeng tsa tse peli, ho teteana ha metsi ho tlaase, matla a tlaase, 'me ka tsela e fapaneng, matla a phahame.Huang Liangen o sebelisitse equation ea kamano pakeng tsa porosity le matla a mochini a nkiloeng ke Ryskewith ho fumana kamano pakeng tsa matla a hatellang a seretse se kopantsoeng le cellulose ether le litaba tsa cellulose ether.
3. Qetello
(1) Cellulose ether e tsoa ho cellulose, e nang le hydroxyl,
Litlamo tsa Ether, mehele ea anhydroglucose le lihlopha tse ling, lihlopha tsena li ama thepa ea 'mele le ea mechine ea seretse.
(2) HPMC e ka ntlafatsa haholo ho boloka metsi a seretse, ho lelefatsa nako ea ho beha seretse, ho fokotsa bongata ba motsoako oa seretse le matla a 'mele o thata.
(3) Ha ho etsoa seretse se seng se tsoakoa, cellulose ether e lokela ho sebelisoa ka mokhoa o utloahalang.Rarolla kamano e hanyetsanang lipakeng tsa ho sebetsa ha seretse le thepa ea mochini.
Nako ea poso: Feb-20-2023