Sakamakon thickening na cellulose ether ya dogara da: digiri na polymerization na cellulose ether, bayani maida hankali, karfi kudi, zazzabi da sauran yanayi. Kayan gelling na maganin ya keɓanta ga alkyl cellulose da abubuwan da aka gyara. Abubuwan gelation suna da alaƙa da matakin maye gurbin, ƙaddamar da bayani da ƙari. Don abubuwan da aka gyara na hydroxyalkyl, abubuwan gel ɗin kuma suna da alaƙa da canjin canjin hydroxyalkyl. Don low danko MC da HPMC, 10% -15% bayani za a iya shirya, matsakaici danko MC da HPMC za a iya shirya 5% -10% bayani, da kuma high danko MC da HPMC iya kawai shirya 2% -3% bayani, kuma yawanci Hakanan an daidaita rarrabuwar danko na ether cellulose tare da 1% -2% bayani.
High-molecular-weight cellulose ether yana da high thickening yadda ya dace, da kuma polymers tare da daban-daban kwayoyin nauyi da daban-daban danko a cikin wannan taro bayani. Maƙasudin danko kawai za a iya samu ta ƙara babban adadin ƙananan nauyin kwayar halitta ether. Dankowar sa yana da ɗan dogaro da ƙimar juzu'i, babban danko ya kai ga danko mai niyya, kuma adadin adadin da ake buƙata yana da ƙarami, kuma danko ya dogara da ƙimar girma. Sabili da haka, don cimma wani daidaituwa, dole ne a tabbatar da wani adadin cellulose ether (matsayi na bayani) da kuma danko bayani. Gel zafin jiki na maganin kuma yana raguwa a layi tare da karuwa da ƙaddamar da maganin, da gels a dakin da zafin jiki bayan kai wani taro. Matsakaicin gelling na HPMC yana da girma sosai a zafin jiki.
Hakanan za'a iya daidaita daidaito ta zabar girman barbashi da zabar ethers cellulose tare da digiri daban-daban na gyare-gyare. Abin da ake kira gyare-gyare shine gabatar da wani mataki na maye gurbin kungiyoyin hydroxyalkyl akan tsarin kwarangwal na MC. Ta hanyar canza dabi'un canji na dangi na madogara biyu, wato, DS da MS dangi maye dabi'un methoxy da hydroxyalkyl waɗanda muke yawan faɗa. Ana iya samun buƙatun ayyuka daban-daban na ether cellulose ta hanyar canza dabi'un maye gurbin dangi na madogara biyu.
High-danko cellulose ether ruwa bayani yana da babban thixotropy, wanda kuma shi ne babban hali na cellulose ether. Maganganun ruwa na MC polymers yawanci suna da pseudoplastic da ruwa maras-thixotropic a ƙasa da zafin gel ɗin su, amma kaddarorin kwararar Newtonian a ƙananan ƙimar ƙarfi. Pseudoplasticity yana ƙaruwa tare da nauyin kwayoyin halitta ko tattarawar ether cellulose, ba tare da la'akari da nau'in maye gurbin da matakin maye gurbin ba. Saboda haka, cellulose ethers na wannan danko sa, ko da MC, HPMC, HEMC, za su kasance ko da yaushe nuna iri rheological Properties idan dai da taro da kuma yawan zafin jiki suna kiyaye akai. Ana samar da gels na tsari lokacin da zafin jiki ya tashi, kuma ana samun kwararar thixotropic sosai. Babban maida hankali da ƙananan danko ethers cellulose suna nuna thixotropy ko da a ƙasa da zafin jiki na gel. Wannan kadarar tana da fa'ida mai yawa ga daidaitawar daidaitawa da sagging a cikin ginin ginin turmi.
Ya kamata a bayyana a nan cewa mafi girman danko na ether cellulose, mafi kyawun riƙewar ruwa, amma mafi girma da danko, mafi girman nauyin kwayoyin halitta na cellulose ether, da kuma raguwa mai dacewa a cikin solubility, wanda yana da mummunan tasiri. a kan turmi maida hankali da aikin yi. Mafi girma da danko, mafi bayyane tasirin tasiri akan turmi, amma bai dace ba. Wasu matsakaici da ƙananan danko, amma gyaggyarawa ether cellulose yana da mafi kyawun aiki wajen inganta ƙarfin tsarin jika. Tare da haɓakar danko, riƙewar ruwa na ether cellulose yana inganta.
Lokacin aikawa: Maris 20-2023