Ukuhlonza ikhwalithi ye-cellulose ether

I-Cellulose ether iyi-polymer yokwenziwa eyenziwe nge-cellulose yemvelo ngokuguqulwa kwamakhemikhali.I-Cellulose ether iphuma ku-cellulose yemvelo.Ukukhiqizwa kwe-cellulose ether kuhlukile kuma-polymers okwenziwa.Impahla yayo eyisisekelo kakhulu i-cellulose, isakhi se-polymer yemvelo.Ngenxa yemininingwane yesakhiwo se-cellulose yemvelo, i-cellulose ngokwayo ayinalo ikhono lokusabela nge-etherification agents.Kodwa-ke, ngemva kokwelashwa kwe-ejenti yokuvuvukala, izibopho eziqinile ze-hydrogen phakathi kwamaketanga amangqamuzana namaketanga ziyabhujiswa, futhi ukukhululwa okusebenzayo kweqembu le-hydroxyl kuba i-alkali cellulose esebenzayo.Thola i-cellulose ether.

Izici zama-cellulose ethers zincike ohlotsheni, inombolo nokusatshalaliswa kwezinto ezibambele.Ukuhlukaniswa kwe-cellulose ether nakho kuhlukaniswa ngokuya ngohlobo lwe-substitute, izinga le-etherification, ukuncibilika kanye nezakhiwo zesicelo ezihlobene.Ngokuya kohlobo lwama-substituent ochungechungeni lwemolekyuli, ingahlukaniswa ibe i-monoether ne-ether exutshiwe.I-MC esivame ukuyisebenzisa i-monoether, futhi i-HPMC iyi-ether exubile.I-Methyl cellulose ether MC iwumkhiqizo ngemuva kokuthi iqembu le-hydroxyl kuyunithi ye-glucose ye-cellulose yemvelo lithathelwe indawo yi-methoxy.Kungumkhiqizo otholwe ngokufaka esikhundleni ingxenye yeqembu le-hydroxyl kuyunithi neqembu le-methoxy kanye nengxenye neqembu le-hydroxypropyl.Ifomula yesakhiwo ithi [C6H7O2(OH)3-mn(OCH3)m[OCH2CH(OH)CH3]n]x Hydroxyethyl methyl cellulose ether HEMC, lezi yizinhlobo eziyinhloko ezisetshenziswa kakhulu futhi ezithengiswa emakethe.

Ngokuya nge-solubility, ingahlukaniswa ibe yi-ionic ne-non-ionic.Ama-ether e-non-ionic cellulose ancibilika emanzini akhiwa ikakhulukazi uchungechunge olubili lwama-alkyl ether kanye nama-hydroxyalkyl ether.I-Ionic CMC isetshenziswa kakhulu ezintweni zokwenziwa zokuhlanza, ukuphrinta izindwangu nokudaya, ukuhlola ukudla nowoyela.I-Non-ionic MC, i-HPMC, i-HEMC, njll. isetshenziswa ikakhulukazi ezintweni zokwakha, i-latex coatings, imithi, amakhemikhali ansuku zonke, njll. Isetshenziswa njenge-thickener, i-ejenti yokugcina amanzi, i-stabilizer, i-disperant kanye ne-ejenti eyenza ifilimu.

Ukuhlonza ikhwalithi ye-cellulose ether:

Umthelela wokuqukethwe kwe-methoxyl kwikhwalithi: ukugcinwa kwamanzi nomsebenzi wokujiya

Umthelela wekhwalithi wokuqukethwe kwe-hydroxyethoxyl/hydroxypropoxyl: ukuphakama kokuqukethwe, kuba ngcono nokugcinwa kwamanzi.

Umthelela wekhwalithi ye-viscosity: izinga eliphezulu le-polymerization, ukuphakama kwe-viscosity kanye nokugcinwa kwamanzi kangcono.

Umthelela wekhwalithi ye-fineness: ukuhlakazeka nokuhlakazeka kahle odakeni, kuyashesha nangokwengeziwe, futhi ukugcinwa kwamanzi okuhlobene kungcono.

Umthelela wekhwalithi wokudluliswa kokukhanya: izinga eliphezulu le-polymerization, izinga le-polymerization lifana kakhulu, kanye nokungcola okuncane.

Umthelela wezinga lokushisa lejeli: izinga lokushisa lejeli elizokwakhiwa licishe libe ngu-75°C

Umthelela wekhwalithi yamanzi: <5%, i-cellulose ether kulula ukumunca umswakama, ngakho kufanele ivalwe futhi igcinwe

Umthelela wekhwalithi yomlotha: <3%, ukuphakama komlotha, ukungcola okwengeziwe

Umthelela wekhwalithi yenani elingu-PH: eduze nokungathathi hlangothi, i-cellulose ether inokusebenza okuzinzile phakathi kuka-PH: 2-11