Li-cellulose etherske li-polymers tse qhibilihang ka metsing tse nkiloeng ho selulose, e leng polima e ngata ka ho fetisisa tlhahong. Ka lilemo tse fetang 60, lihlahisoa tsena tse feto-fetohang li phethile karolo ea bohlokoa lits'ebetsong tse ngata, ho tloha ho lihlahisoa tsa kaho, lirafshoa le lipente ho ea lijong, litlolo le meriana.
Bakeng sa lihlahisoa tsa kaho, li-cellulose ethers li sebetsa e le li-thickeners, li-binders, baetsi ba lifilimi le lisebelisoa tsa ho boloka metsi. Li boetse li sebetsa e le lithuso tsa ho emisa, li-surfactants, mafura, li-colloid tse sireletsang le li-emulsifer. Ntle le moo, litharollo tse nang le metsi a li-cellulose ethers tse ling tsa thermally gel, thepa e ikhethang e bapalang karolo ea bohlokoa ho makatsang.
mefuta e fapaneng ya ditshebediso. Motsoako ona oa bohlokoa oa thepa ha o fumanoe ho polymer efe kapa efe e qhibilihang ka metsing.
Taba ea hore lisebelisoa tse ngata tse molemo li teng ka nako e le 'ngoe' me hangata li sebetsa hammoho e ka ba molemo o moholo oa moruo. Lits'ebetsong tse ngata, ho tla hlokahala metsoako e 'meli, e meraro kapa ho feta ho etsa mosebetsi o tšoanang o etsoang ke sehlahisoa se le seng sa cellulose ether. Ho feta moo, li-cellulose ethers li sebetsa hantle haholo, hangata
ho fana ka ts'ebetso e nepahetseng maemong a tlase ho feta a hlokahalang ka lipolima tse ling tse qhibilihang ka metsing.
Dow Construction Chemicals e fana ka mefuta e mengata ea lihlahisoa tsa cellulosic, ho kenyelletsa methyl cellulose, hydroxyethyl cellulose le carboxymethyl cellulose. Methyl cellulose ethers e sebelisoa haholo bakeng sa lits'ebetso tse ngata indastering ea kaho le ea kaho.
Khemistri ea Cellulose Ethers
Khoebo ea rona e fana ka cellulose ethers ka mefuta e mene ea mantlha:
1.Hydroxyethyl methyl cellulose (HEMC/MHEC)
2.Hydroxypropyl methyl cellulose (HPMC,MC)
3. Hydroxyethyl cellulose (HEC)
4.Carboxy methyl cellulose(CMC)
Mefuta ena ka bobeli e na le mokokotlo oa polymeric oa cellulose, k'habohaedreite ea tlhaho e nang le sebopeho sa mantlha se pheta-phetoang sa li-unit tsa anhydroglucose. Nakong ea ha ho etsoa li-cellulose ethers, likhoele tsa selulose li futhumatsoa ka tharollo ea caustic eo hape e tšoaroang ka methyl chloride, le propylene oxide kapa ethylene oxide, e hlahisang hydroxypropyl methyl cellulose kapa hydroxyethyl methyl cellulose, ka ho latellana. Sehlahisoa sa metsoako ea fibrous se hloekisoa 'me se siloa hore e be phofo e ntle, e ts'oanang.
Lihlahisoa tsa maemo a khethehileng le tsona li entsoe ho fihlela litlhoko tsa liindasteri tsa specifc.
Lihlahisoa tsa rona tsa cellulose ether li fumaneha ka mefuta e meraro e fapaneng: phofo, phofo e entsoeng ka holimo le granular. Mofuta oa sehlahisoa se lokisoang se susumetsa hore na ho khethoe mofuta ofe. Lits'ebetsong tse ngata tsa motsoako o omileng, phofo e sa sebelisoang hangata e sebelisoa, athe bakeng sa lisebelisoa tse itokiselitseng ho kopanya, moo phofo ea cellulosic e kenngoa ka ho toba metsing, phofo e entsoeng ka holim'a metsi kapa mefuta ea granular e khethoa.
Kakaretso Thepa
Thepa e akaretsang e tloaelehileng ho cellulose ethers ea rona e thathamisitsoe mona. Lihlahisoa ka bomong li bonts'a thepa ena ka likhato tse fapaneng mme li ka ba le tsona
additional properties desirable for specific applications. For more information, email at sales@kimachemical.com .
| Thepa | Lintlha | Melemo |
| Tlamo | E sebelisoa e le li-binders tse sebetsang hantle haholo bakeng sa lisebelisoa tsa samente tse extruded | Matla a matala |
| Emulsifcation | Tsitsisa emulsions ka ho fokotsa tsitsipano ea sefahleho le sefahleho le ka | Botsitso |
| Sebopeho sa lifilimi | Etsa li-flms tse hlakileng, tse thata, tse tenyetsehang tse qhibilihang metsing | • Litšitiso tse babatsehang tsa oli le mafura |
| Lubrication | E fokotsa likhohlano ka extrusion ea samente; e ntlafatsa ts'ebetso ea lisebelisoa tsa letsoho | • Pompe e ntlafetseng ea konkreite, li-grouts tsa mochini le spray |
| Nonionic | Lihlahisoa ha li na tefiso ea ionic | • E ke ke ea rarahana le letsoai la tšepe kapa mefuta e meng ea ionic ho theha |
| Sollubility (organic) | Soluble in binary organic and organic solvent/water systems bakeng sa mefuta e khethiloeng le limaraka | Motsoako o ikhethileng oa ho qhibiliha ha manyolo le ho qhibiliha ha metsi |
| Solubility (metsi) | • Lihlahisoa tse entsoeng ka holim'a metsi / granular li ka kenngoa ka ho toba ho metsi | • Bonolo ba ho hasana le ho qhalana |
| pH botsitso | E tsitsitse ho feta boemo ba pH ba 2.0 ho isa ho 13.0 | • Viscosity botsitso |
| Ts'ebetso ea bokaholimo | • Etsa joalo ka li-surfactants ka mokelikeli o nang le metsi | • Emulsifcation |
| Ho fanyeha | E laola ho lula ha likaroloana tse tiileng tsamaisong ea metsi | • Khahlanong le ho rarolla li-aggregate kapa li-pigments |
| Thermal gelation | E etsahala ho li-aqueous solutions tsa methyl cellulose ethers ha e futhumatsoa ka holimo ho mocheso o itseng | • Thepa e laoloang ka potlako Li-gel li khutlela tharollong ha li pholile |
| Ho teteana | Mefuta e mengata e fapaneng ea litekanyo tsa limolek'hule bakeng sa ho matlafatsa tsamaiso ea metsi | • Lethathamo la liprofaele tsa rheological |
| Ho boloka metsi | Moemeli ea matla oa ho boloka metsi; e boloka metsi ka har'a litsamaiso tse entsoeng | • E sebetsa hantle haholo |
Likhomaretsi tsa Lithaele tse thehiloeng ho samente
Lihlahisoa tsa rona li thusa ho sebetsa ha liretse tse tšesaane ka ho boloka metsi le ka ts'ebetso ea pseudoplastic rheological. Fumana ts'ebetso e bonolo le e bonolo ea ho sebetsa, ho boloka metsi a mangata, ho koloba ho ntlafalitsoeng ho tile, nako e ntle ea ho bula le nako ea tokiso, le tse ling.
Lithaele tsa lithaele
Cellulose ethers e sebetsa e le thuso ea ho boloka metsi le ho emisa. Tseba mokhoa o bonolo oa ho sebetsa, ho khomarela hantle mahlakoreng a lithaele, ho honyela ho tlase, khanyetso e phahameng ea abrasion, ho tiea ho hotle le momahano, le tse ling.
Li- Underlayments tsa ho Iketsa
Li-cellulosics li fana ka ho boloka metsi le lubricity ho ntlafatsa phallo le ho pompa, ho fokotsa karohano le tse ling.
Seretse sa EIFS / Skim Coat
Fana ka mokhoa o phethahetseng oa ho qetela o nang le ts'ebetso e ntlafalitsoeng, botsitso ba moea o se nang letho, ho khomarela, ho boloka metsi le tse ling.
Li-plaster tse thehiloeng ho samente
Fana ka ts'ebetso e ntlafetseng ka ho ntlafala ha sag, ho sebetsa hantle, nako e bulehileng, ho tsitsisa ha moea o se nang moea, ho khomarela, ho boloka metsi, chai le tse ling.
Thepa ea Kaho e Thehiloeng ka Gypsum
Fana ka sephetho se lakatsehang sa sebaka se boreleli, se tsitsitseng le se tšoarellang se nang le boleng bo tsitsitseng ba sehlahisoa le likarolo tsa bohlokoa tsa ts'ebetso.
Lisebelisuoa tse Atolositsoeng tsa Samente le Samente-Fiber
Fokotsa likhohlano le ho fana ka lubricity ho thusa ho extrusion le mekhoa e meng ea ho etsa.
Sistimi e Thehiloeng ka Latex (E Loketse-Ho Sebelisa)
Mefuta e fapaneng ea limaraka tsa viscosity e fana ka ts'ebetso e ntle, ho lieha ho qhibiliha, nako e bulehileng, nako ea tokiso le tse ling.
Nako ea poso: Nov-13-2018