Hydroxyethyl Cellulose (HEC) wani nau'in polymer ne wanda ba na ionic ruwa mai narkewa wanda aka yadu ana amfani dashi a cikin sutura, kayan kwalliya, magunguna, abinci, yin takarda, hako mai da sauran filayen masana'antu. Yana da wani fili ether cellulose samu ta hanyar etherification na cellulose, wanda hydroxyethyl maye gurbin wani ɓangare na hydroxyl kungiyoyin cellulose. Abubuwan da ke cikin jiki da sinadarai na hydroxyethyl cellulose sun sa ya zama ɗaya daga cikin mahimman abubuwan da ke cikin thickeners, gelling agents, emulsifiers da stabilizers.
Tafasa batu na hydroxyethyl cellulose
Hydroxyethyl cellulose shine babban polymer kwayoyin halitta tare da babban nauyin kwayoyin halitta, kuma takamaiman wurin tafasarsa ba shi da sauƙin tantancewa kamar na ƙananan mahadi. A aikace-aikace masu amfani, manyan kayan kwayoyin halitta irin su hydroxyethyl cellulose ba su da madaidaicin wurin tafasa. Dalili kuwa shi ne irin wadannan abubuwa za su rugujewa yayin dumama, maimakon su juyo kai tsaye daga ruwa zuwa iskar gas ta hanyar canjin zamani kamar kananan kananan sinadarai. Saboda haka, manufar "tafiyar batu" na hydroxyethyl cellulose bai dace ba.
Gabaɗaya, idan hydroxyethyl cellulose ya yi zafi sosai, zai fara narkewa a cikin ruwa ko sauran kaushi don samar da maganin colloidal, sa'an nan kuma a yanayin zafi mafi girma, sarkar polymer za ta fara karyewa kuma a ƙarshe za ta bazu, tana fitar da ƙananan ƙwayoyin cuta kamar ruwa, carbon dioxide da sauran abubuwa masu lalacewa ba tare da yin wani tsari na tafasa ba. Saboda haka, hydroxyethyl cellulose ba shi da madaidaicin wurin tafasa, amma zafin jiki na bazuwa, wanda ya bambanta da nauyin kwayoyin halitta da matakin maye gurbinsa. Gabaɗaya magana, zafin bazuwar thermal na hydroxyethyl cellulose yawanci yana sama da 200 ° C.
Thermal kwanciyar hankali na hydroxyethyl cellulose
Hydroxyethyl cellulose yana da kyakkyawan kwanciyar hankali na sinadarai a cikin dakin da zafin jiki, yana iya jure wani yanki na acid da alkali, kuma yana da wani juriya na zafi. Duk da haka, lokacin da yawan zafin jiki ya yi yawa, musamman ma idan babu masu kaushi ko wasu masu daidaitawa, sassan polymer za su fara karya saboda aikin zafi. Wannan tsari na bazuwar thermal baya tare da tafasasshen fili, sai dai a hankali karyewar sarka da rashin ruwa, yana sakin abubuwa masu lalacewa kuma a ƙarshe yana barin samfuran carbonized.
A cikin aikace-aikacen masana'antu, don guje wa ɓarnar da ke haifar da matsanancin zafin jiki, hydroxyethyl cellulose yawanci ba a fallasa shi zuwa yanayin da ya wuce yanayin ruɗuwar sa. Ko da a cikin aikace-aikacen zafin jiki mai girma (kamar amfani da ruwa mai hakowa), ana amfani da hydroxyethyl cellulose sau da yawa tare da wasu kayan don haɓaka kwanciyar hankali ta thermal.
Amfani da hydroxyethyl cellulose
Ko da yake hydroxyethyl cellulose ba shi da madaidaicin wurin tafasa, iya narkewa da kaddarorin sa sun sanya shi amfani da shi sosai a masana'antu da yawa. Misali:
Coating masana'antu: hydroxyethyl cellulose za a iya amfani da a matsayin thickener don taimaka daidaita rheology na shafi, hana hazo da kuma inganta matakin da kwanciyar hankali na shafi.
Kayan shafawa da sinadarai na yau da kullun: Yana da mahimmanci a cikin kayan wanke-wanke da yawa, samfuran kula da fata, shamfu da man goge baki, wanda zai iya ba samfurin ɗanko mai kyau, ɗanɗano da kwanciyar hankali.
Masana'antar harhada magunguna: A cikin shirye-shiryen harhada magunguna, ana amfani da hydroxyethyl cellulose sau da yawa wajen samar da allunan da aka ci gaba da fitarwa da sutura don sarrafa adadin sakin kwayoyi.
Masana'antar abinci: A matsayin mai kauri, stabilizer da emulsifier, ana kuma amfani da hydroxyethyl cellulose a cikin abinci, musamman a cikin ice cream, jelly da biredi.
Hako mai: A hako mai, hydroxyethyl cellulose wani muhimmin bangare ne na hakowa, wanda zai iya kara dankon ruwan, daidaita bangon rijiyar da rage asarar laka.
A matsayin abu na polymer, hydroxyethyl cellulose ba shi da madaidaicin wurin tafasa saboda yana lalatawa a yanayin zafi mai yawa maimakon yanayin tafasa na yau da kullun. Matsakaicin bazuwar zafinsa yawanci sama da 200 ° C, ya danganta da nauyin kwayoyinsa da matakin maye gurbinsa. Duk da haka, hydroxyethyl cellulose ne yadu amfani a coatings, kayan shafawa, magani, abinci da kuma man fetur saboda da kyau kwarai thickening, gelling, emulsifying da stabilizing Properties. A cikin waɗannan aikace-aikacen, yawanci ana nisantar da shi daga fuskantar yanayin zafi da yawa don tabbatar da aiki da kwanciyar hankali.
Lokacin aikawa: Oktoba-23-2024