Cellulose etherihe atụ bụ ngwakọta polymer mere nke cellulose nwere ihe ether. Mgbanaka glucose ọ bụla dị na cellulose macromolecule nwere otu hydroxyl atọ, otu hydroxyl bụ isi na carbon carbon nke isii, yana otu hydroxyl nke abụọ na carbon carbon nke abụọ na nke atọ. A na-eji otu hydrocarbon dochie hydrogen dị na otu hydroxyl iji mepụta cellulose. Ọ bụ ngwaahịa nke nnọchi hydroxyl hydrogen site hydrocarbon otu na cellulose polymer. Cellulose bụ ngwakọta polyhydroxy nke na-adịghị agbaze ma ọ bụ gbazee. Cellulose nwere ike agbaze na mmiri, itughari alkali ngwọta na organic mgbaze mgbe etherification, na nwere thermoplastic Njirimara.
Cellulose ether bụ okwu n'ozuzu nke usoro ngwaahịa na-emepụta site na mmeghachi omume nke cellulose alkali na etherifying n'okpuru ọnọdụ ụfọdụ. Alkali cellulose na-anọchi anya ihe dị iche iche etherifying iji nweta cellulose ethers dị iche iche.
Dị ka ionization Njirimara nke substituents, cellulose ethers atụ nwere ike kewaa ionic (dị ka carboxymethyl cellulose) na-abụghị ionic (dị ka methyl cellulose) abụọ edemede.
Dị ka ụdị nnọchi anya,cellulose ethersEnwere ike kewaa ihe atụ na otu ether (dị ka methyl cellulose) na ether agwakọta (dị ka hydroxypropyl methyl cellulose). Dị ka solubility, nwere ike kewaa n'ime mmiri soluble (dị ka hydroxyethyl cellulose) na organic mgbaze solubility (dị ka ethyl cellulose). Ngwakọta agwakọta akọrọ na-ejikarị cellulose soluble mmiri, nke enwere ike kewaa n'ụdị agbaze ngwa ngwa na ụdị mgbaze na-egbu oge mgbe ọgwụgwọ elu gasịrị.
Admixtures na-ekere òkè dị mkpa n'ịkwalite ihe onwunwe nke ngwa ngwa akọrọ akọrọ na ihe karịrị 40% nke ihe onwunwe na-eri na ngwa ngwa agwakọta akọrọ. A na-enye akụkụ dị ukwuu nke admixture na ahịa ụlọ site n'aka ndị na-emepụta si mba ọzọ, na ndị na-ebubata ya na-enyekwa usoro ntinye aka nke ngwaahịa ahụ. N'ihi ya, ọnụ ahịa ngwa ngwa agwakọta agwakọta ka dị elu, ọ na-esikwa ike ịme ka ngwa ngwa masonry na plasta gbasaa n'ọtụtụ buru ibu na ebe sara mbara. A na-achịkwa ngwaahịa ahịa ahịa dị elu site na ụlọ ọrụ mba ọzọ, ndị na-emepụta ngwa agha akọrọ akọrọ na-enweta uru dị ala, ọnụ ahịa na-adịghị mma; Ngwa nke admixture enweghị nyocha nke usoro na nke ezubere iche, na-agbaso usoro mba ọzọ na-enweghị isi.
Onye na-ejide mmiri bụ isi ihe na-eme ka mmiri dị mma na-arụ ọrụ nke mmiri agwakọta na-ekpo ọkụ yana otu n'ime ihe ndị dị mkpa iji chọpụta ọnụ ahịa ngwa ngwa agwakọta. Isi ọrụ nke cellulose ether bụ iji jide mmiri.
Usoro ọrụ nke cellulose ether na ngwa agha bụ ndị a:
(1) ngwa agha na cellulose ether etisasịwo na mmiri, n'ihi na elu-arụsi ọrụ ike ọrụ iji hụ na gelled ihe n'ụzọ dị irè edo nkesa na usoro, na cellulose ether dị ka a ụdị nchebe colloid, "ngwugwu" siri ike ahụ, na na ya mputa elu na-etolite a oyi akwa nke lubrication film, na slurry usoro ọzọ kwụsiri ike, na-mma na slurry na-ewu nke ọma na-ewu nke ọma na mmiri mmiri usoro.
(2)Cellulose etherngwọta ruru ya molekụla Ọdịdị e ji mara, nke mere na mmiri na ngwa agha adịghị mfe ida, na nke nta nke nta wepụtara na a ogologo oge, na-enye ngwa agha ọma mmiri njigide na workability.
Oge nzipu: Eprel-25-2024