Hydroxyethyl Cellulose (HEC) da hydroxypropyl cellulose (HPC) sune abubuwan da aka saba amfani da su na cellulose. Suna da bambance-bambance masu mahimmanci a cikin tsari, aiki da aikace-aikace.
1. Tsarin sinadaran
Hydroxyethyl cellulose (HEC): Hydroxyethyl cellulose yana samuwa ta hanyar gabatar da ƙungiyar hydroxyethyl (-CH₂CH₂OH) akan kwayoyin cellulose. Ƙungiyar hydroxyethyl tana ba da HEC mai kyau solubility da kwanciyar hankali.
Hydroxypropyl Cellulose (HPC): Hydroxypropyl cellulose yana samuwa ta hanyar gabatar da ƙungiyar hydroxypropyl (-CH₂CHOHCH₃) akan kwayoyin cellulose. Gabatarwar ƙungiyoyin hydroxypropyl yana ba HPC daban-daban solubility da halayen danko.
2. Solubility
HEC: Hydroxyethylcellulose yana da kyau solubility a cikin ruwa kuma zai iya samar da wani m colloidal bayani. Solubility ɗin sa ya dogara da matakin maye gurbin ƙungiyoyin hydroxyethyl (watau adadin ƙungiyoyin hydroxyethyl kowace naúrar glucose).
HPC: Hydroxypropyl cellulose yana da wani abu mai narkewa a cikin ruwa da sauran kaushi, musamman a cikin kaushi na kwayoyin kamar ethanol. Solubility na HPC yana tasiri sosai da zafin jiki. Yayin da zafin jiki ya karu, narkewar sa a cikin ruwa zai ragu.
3. Dankowa da rheology
HEC: Hydroxyethyl cellulose yana da babban danko a cikin ruwa kuma yana baje kolin kaddarorin wani ruwa mai tsafta, watau shear thinning. Lokacin da aka yi amfani da shear, dankowar sa yana raguwa, yana sauƙaƙa amfani da amfani.
HPC: Hydroxypropyl cellulose yana da ƙananan danko kuma yana nuna irin wannan pseudoplasticity a cikin bayani. Har ila yau, HPC mafita na iya samar da m colloids, amma danko yawanci kasa da HEC.
4. Yankunan aikace-aikace
HEC: Hydroxyethyl cellulose ne yadu amfani a coatings, gini kayan, kayan shafawa, detergents da sauran filayen. A matsayin thickener, stabilizer da suspending wakili, zai iya yadda ya kamata sarrafa danko da rheology na tsarin. A cikin fenti da sutura, HEC yana hana daidaitawar pigment kuma yana haɓaka matakin sutura.
HPC: Hydroxypropyl cellulose an fi amfani dashi a cikin magunguna, abinci, kayan shafawa da sauran fannoni. A cikin masana'antar harhada magunguna, ana yawan amfani da HPC azaman mai ɗaure da wakili mai sarrafawa don allunan. A cikin masana'antar abinci, ana iya amfani dashi azaman mai kauri da emulsifier. Saboda solubility a cikin kwayoyin kaushi, HPC kuma ana amfani dashi a cikin wasu kayan shafa da membrane.
5. Kwanciyar hankali da karko
HEC: Hydroxyethyl cellulose yana da kyakkyawan kwanciyar hankali na sinadarai da dorewa, ba shi da sauƙi ga canje-canjen pH, kuma ya kasance mai karko yayin ajiya. HEC ya kasance barga a ƙarƙashin duka manyan da ƙananan yanayin pH.
HPC: Hydroxypropyl cellulose yana kula da canje-canje a yanayin zafi da pH, kuma yana da wuyar yin amfani da gelation musamman a yanayin zafi. Zaman lafiyarsa ya fi kyau a ƙarƙashin yanayin acidic, amma za a rage kwanciyar hankali a ƙarƙashin yanayin alkaline.
6. Muhalli da biodegradability
HEC: Hydroxyethyl cellulose wani abu ne na cellulose na halitta, yana da kyau biodegradability kuma yana da abokantaka na muhalli.
HPC: Hydroxypropyl cellulose shi ma abu ne mai yuwuwa, amma halayen lalatarsa na iya bambanta saboda iyawar sa da bambancin aikace-aikace.
Hydroxyethyl cellulose da hydroxypropyl cellulose sune mahimman abubuwan da aka samo asali na cellulose guda biyu. Ko da yake dukansu suna da ikon yin kauri, daidaitawa da samar da colloid, saboda bambance-bambancen tsari, suna da bambance-bambance a cikin solubility, danko, da filayen aikace-aikace. Akwai babban bambanci a cikin kwanciyar hankali. Zaɓin abin da ake samu na cellulose don amfani ya dogara da takamaiman buƙatun aikace-aikacen da buƙatun aiki.
Lokacin aikawa: Agusta-08-2024