Mohlala oa cellulose ether

Mohlala oa cellulose ether ke motsoako oa polymer o entsoeng ka selulose ka sebopeho sa ether.Lesale le leng le le leng la tsoekere ka har'a cellulose macromolecule e na le lihlopha tse tharo tsa hydroxyl, sehlopha sa mantlha sa hydroxyl ho athomo ea botšelela ea k'habone, le sehlopha sa bobeli sa hydroxyl ho liathomo tsa carbon tsa bobeli le tsa boraro.Hydrojene e sehlopheng sa hydroxyl e nkeloa sebaka ke sehlopha sa hydrocarbon ho etsa selulose.Ke sehlahisoa sa ho nkela sebaka sa hydroxyl hydrogen ka sehlopha sa hydrocarbon ho polymer ea cellulose.Cellulose ke motsoako oa polyhydroxy polymer o sa qhibiliheng kapa hona ho qhibiliha.Cellulose e ka qhibiliha ka metsing, ea hlapolla tharollo ea alkali le mokelikeli oa tlhaho ka mor'a etherification, 'me e na le thepa ea thermoplastic.

Cellulose ether ke lentsoe le akaretsang la letoto la lihlahisoa tse hlahisoang ke karabelo ea alkali cellulose le etherifying agent tlasa maemo a itseng.Alkali cellulose e nkeloa sebaka ke lisebelisoa tse fapaneng tsa etherifying ho fumana li-ether tse fapaneng tsa cellulose.

Ho ea ka thepa ea ionization ea li-substituent, mohlala oa cellulose ethers o ka aroloa ka ionic (joalo ka carboxymethyl cellulose) le non-ionic (joalo ka methyl cellulose) mekhahlelo e 'meli.

Ho latela mofuta oa substituent, mohlala oa cellulose ethers o ka aroloa ka ether e le 'ngoe (joalo ka methyl cellulose) le ether e tsoakiloeng (joalo ka hydroxypropyl methyl cellulose).Ho ea ka solubility, e ka aroloa ka metsi a qhibilihang (joalo ka hydroxyethyl cellulose) le organic solvent solubility (joalo ka ethyl cellulose).Seretse se omileng se tsoakiloeng haholo-holo se sebelisa selulose e qhibilihang ka metsing, e ka aroloa ka mofuta o qhibilihang ka potlako le mofuta o liehang oa ho qhibiliha ka mor'a phekolo ea holim'a metsi.

Li-admixtures li phetha karolo ea bohlokoa ho ntlafatsa thepa ea seretse se omileng se omileng 'me se etsa chelete e fetang 40% ea litšenyehelo tsa thepa ka seretse se omileng se omileng.Karolo e kholo ea motsoako 'marakeng oa lehae o fanoa ke bahlahisi ba tsoang kantle ho naha, mme litekanyetso tsa referense tsa sehlahisoa le tsona li fanoa ke bafani ba thepa.Ka lebaka leo, litšenyehelo tsa lihlahisoa tsa seretse tse omeletseng li lula li le holimo, 'me ho thata ho tsebahatsa seretse se tloaelehileng sa masonry le seretse sa plastering ka bongata bo boholo le sebaka se sephara.Lihlahisoa tsa 'maraka tsa maemo a holimo li laoloa ke lik'hamphani tsa linaha tse ling, baetsi ba seretse se omeletseng phaello e tlaase, theko e tlaase;Tšebeliso ea motsoako ha e na lipatlisiso tse hlophisitsoeng le tse lebisitsoeng, ho latela mekhoa ea linaheng tse ling ka bofofu.

Setsi sa ho boloka metsi ke motsoako oa bohlokoa oa ho ntlafatsa ts'ebetso ea ho boloka metsi ka seretse se omileng se tsoakiloeng hape e le e 'ngoe ea li-addmixtures tsa bohlokoa ho fumana litšenyehelo tsa thepa ea seretse se omeletseng se tsoakiloeng.Mosebetsi o ka sehloohong oa cellulose ether ke ho boloka metsi.

Mokhoa oa ts'ebetso oa cellulose ether ka seretse o tjena:

(1) seretse ka selulose ether qhibiliha ka metsing, hobane karolo e ka holimo e sebetsang ho etsa bonnete ba hore thepa ea gelled e sebetsa hantle ka mokhoa o ts'oanang tsamaisong, 'me cellulose ether e le mofuta oa tšireletso ea colloid, "sephutheloana" likaroloana tse tiileng, le holim'a bokantle ba eona bo ka ntle. theha lera la lubrication filimi, tsamaiso ea slurry e tsitsitseng haholoanyane, hape e ntlafatsa slurry ka mokhoa oa ho kopanya oa mokelikeli le kaho ea slip e ka 'na ea e-ba hantle feela.

(2) Tharollo ea cellulose ether ka lebaka la litšobotsi tsa eona tsa sebopeho sa limolek'hule, e le hore metsi a seretse a se ke a lahleheloa ke bonolo, 'me butle-butle a lokolloa ka nako e telele, a fana ka seretse ho boloka metsi a matle le ho sebetsa hantle.