1.Hydroxypropyl methylcellulose (HPMC)wani muhimmin sinadarin cellulose ether ne, wanda ake amfani da shi sosai a gine-gine, magunguna, abinci, kayan kwalliya da sauran fannoni. HPMC yana da kyawawan halaye na kauri, samar da fim, yin emulsifying, dakatarwa da kuma riƙe ruwa, don haka yana taka muhimmiyar rawa a masana'antu da yawa. Samar da HPMC ya dogara ne akan hanyoyin gyara sinadarai. A cikin 'yan shekarun nan, tare da ci gaban fasahar kere-kere, hanyoyin samarwa bisa ga fermentation na ƙwayoyin cuta suma sun fara jawo hankali.
2. Ka'idar samar da fermentation ta HPMC
Tsarin samar da sinadarin HPMC na gargajiya yana amfani da sinadarin cellulose na halitta a matsayin kayan da aka samar kuma ana samar da shi ta hanyar amfani da hanyoyin sinadarai kamar su alkalization, etherification da refining. Duk da haka, wannan tsari ya ƙunshi adadi mai yawa na sinadarai na halitta da kuma sinadaran sinadarai, wanda ke da babban tasiri ga muhalli. Saboda haka, amfani da ƙwayoyin cuta don haɗa cellulose da kuma ƙara etherify shi ya zama hanyar samarwa mafi aminci ga muhalli da dorewa.
Haɗa ƙwayoyin cuta na cellulose (BC) ya kasance abin tattaunawa a 'yan shekarun nan. Kwayoyin cuta kamar Komagataeibacter (kamar Komagataeibacter xylinus) da Gluconacetobacter na iya haɗa cellulose mai tsarki kai tsaye ta hanyar fermentation. Waɗannan ƙwayoyin cuta suna amfani da glucose, glycerol ko wasu tushen carbon a matsayin substrates, suna fermentation a ƙarƙashin yanayi mai dacewa, kuma suna fitar da nanofibers na cellulose. Ana iya canza cellulose na ƙwayoyin cuta da aka samu zuwa HPMC bayan hydroxypropyl da methylation sun gyara.
3. Tsarin samarwa
3.1 Tsarin narkewar ƙwayoyin cuta cellulose
Inganta tsarin fermentation yana da matuƙar muhimmanci wajen inganta yawan amfanin da kuma ingancin ƙwayoyin cuta cellulose. Manyan matakai sune kamar haka:
Duba da kuma noma nau'in tari: Zaɓi nau'in cellulose masu yawan amfani, kamar Komagataeibacter xylinus, don kula da dabbobi da kuma inganta su.
Tsarin fermentation: Samar da tushen carbon (glucose, sucrose, xylose), tushen nitrogen (cirewar yisti, peptone), gishirin da ba na halitta ba (phosphates, gishirin magnesium, da sauransu) da kuma masu daidaita (acetic acid, citric acid) don haɓaka haɓakar ƙwayoyin cuta da kuma haɗa cellulose.
Kula da yanayin fermentation: gami da zafin jiki (28-30℃), pH (4.5-6.0), matakin oxygen da aka narkar (motsi ko al'adar tsaye), da sauransu.
Tarawa da tsarkakewa: Bayan fermentation, ana tattara ƙwayoyin cuta ta hanyar tacewa, wankewa, busarwa da sauran matakai, sannan a cire sauran ƙwayoyin cuta da sauran ƙazanta.
3.2 Gyaran sinadarin hydroxypropyl methylation na cellulose
Ana buƙatar a gyara ƙwayoyin cuta cellulose da aka samu ta hanyar sinadarai don ba shi halayen HPMC. Manyan matakan sune kamar haka:
Maganin Alkalinization: a jiƙa a cikin adadin maganin NaOH da ya dace don faɗaɗa sarkar cellulose da inganta aikin amsawar etherification na gaba.
Haɗakarwar iska: a ƙarƙashin takamaiman yanayin zafi da yanayin catalytic, ƙara propylene oxide (hydroxypropylation) da methyl chloride (methylation) don maye gurbin ƙungiyar cellulose hydroxyl don samar da HPMC.
Tsaftacewa da tsaftacewa: Tsaftacewa da acid bayan amsawar don cire sinadaran da ba su da amsawa, kuma a sami samfurin ƙarshe ta hanyar wankewa, tacewa da bushewa.
Murkushewa da rarrabawa: murkushe HPMC zuwa barbashi waɗanda suka dace da ƙayyadaddun bayanai, sannan a duba su kuma a haɗa su bisa ga nau'ikan danko daban-daban.
4. Manyan fasahohi da dabarun ingantawa
Inganta matsi: inganta yawan ƙwayoyin cellulose da inganci ta hanyar injiniyan kwayoyin halitta na ƙwayoyin cuta.
Inganta tsarin fermentation: yi amfani da bioreactors don sarrafa aiki mai ƙarfi don inganta ingancin samar da cellulose.
Tsarin etherification na kore: rage amfani da sinadarai masu narkewa na halitta da haɓaka fasahohin etherification masu dacewa da muhalli, kamar gyaran enzyme catalytic.
Kula da ingancin samfur: ta hanyar nazarin matakin maye gurbin, narkewa, danko da sauran alamun HPMC, tabbatar da cewa ya cika buƙatun aikace-aikacen.
An yi shi ne bisa ga fermentationHPMCHanyar samarwa tana da fa'idodin sabuntawa, mai kyau ga muhalli da inganci, wanda ya yi daidai da yanayin kimiyyar sinadarai masu kore da ci gaba mai ɗorewa. Tare da ci gaban fasahar kere-kere, ana sa ran wannan fasaha za ta maye gurbin hanyoyin sinadarai na gargajiya a hankali tare da haɓaka amfani da HPMC a fannonin gini, abinci, magani, da sauransu.
Lokacin Saƙo: Afrilu-11-2025