Menene aikace-aikacen Cellulose Ether?

Yana gabatar da shirye-shiryen ether cellulose, aikin ether cellulose dacellulose ether aikace-aikace, musamman aikace-aikace a cikin sutura.
Mahimman kalmomi: ether cellulose, aiki, aikace-aikace
Cellulose abu ne na halitta macromolecular fili. Tsarin sinadaransa shine polysaccharide macromolecule tare da β-glucose mai anhydrous azaman zoben tushe. Akwai rukunin hydroxyl na farko da ƙungiyoyin hydroxyl na biyu akan kowane zoben tushe. Ta hanyar gyare-gyaren sinadarai, ana iya samun jerin abubuwan da aka samo asali na cellulose, kuma cellulose ether yana daya daga cikinsu. Ana amfani da ethers na cellulose sosai a yawancin masana'antu.

1.Shiri

Ana samun ether cellulose ta hanyar amsa cellulose tare da NaOH, sannan amsa tare da monomers daban-daban na aiki irin su monochloromethane, ethylene oxide, propylene oxide, da dai sauransu, da kuma wanke kayan gishiri da cellulose sodium.

2.Ayyuka

2.1 Bayyanar: Cellulose ether fari ne ko fari fari, mara wari, mara guba, foda mai fibrous tare da ruwa mai sauƙi, mai sauƙin ɗaukar danshi, kuma ya narke cikin ingantaccen colloid mai ɗanɗano mai ɗanɗano a cikin ruwa.
2.2 Ionicity: MC, MHEC, MHPC, HEC ne nonionic; NaCMC, NaCMHEC su ne anionic.
2.3 Etherification: Halaye da digiri na etherification na etherification zai shafi aikin ether cellulose a lokacin etherification, irin su solubility, ikon yin fim, ƙarfin haɗin gwiwa da juriya na gishiri.
2.4 Solubility: (1) MC yana narkewa a cikin ruwan sanyi, ba zai iya narkewa a cikin ruwan zafi, kuma yana narkewa a cikin wasu kaushi; MHEC yana narkewa a cikin ruwan sanyi, wanda ba zai iya narkewa a cikin ruwan zafi da kaushi na kwayoyin halitta. Koyaya, lokacin da maganin ruwa na MC da MHEC ya yi zafi, MC da MHEC za su yi hazo. MC yana hazo a 45-60°C, yayin da hazo zafin hazo na gauraye etherified MHEC ya tashi zuwa 65-80°C. Lokacin da aka saukar da zafin jiki, hazo ya sake narkewa. (2) HEC, NaCMC, da NaCMHEC suna narkewa a cikin ruwa a kowane zafin jiki, amma ba za a iya narkewa a cikin kaushi na kwayoyin halitta (tare da ƴan kaɗan).
2.5 Jinkirin kumburi: Cellulose ether yana da wani jinkirin kumburi a cikin ruwan pH mai tsaka tsaki, amma yana iya shawo kan wannan jinkirin kumburi a cikin ruwan alkaline pH.
2.6 Danko: Cellulose ether narke cikin ruwa a cikin nau'i na colloid, kuma danko ya dogara da matakin polymerization na ether cellulose. Maganin ya ƙunshi hydrated macromolecules. Saboda haɗakar macromolecules, yanayin kwararar hanyoyin mafita ya bambanta da na ruwan Newton, amma yana nuna halin da ke canzawa tare da ƙarfi. Saboda tsarin macromolecular na cellulose ether, danko na bayani yana ƙaruwa da sauri tare da karuwa da hankali kuma yana raguwa da sauri tare da karuwar zafin jiki.
2.7 Zaman lafiyar Halittu: Ana amfani da ether cellulose a cikin ruwa lokaci. Muddin ruwa yana nan, ƙwayoyin cuta za su yi girma. Ci gaban kwayoyin cuta yana haifar da samar da kwayoyin enzyme. Enzyme yana karya haɗin haɗin anhydroglucose wanda bai maye gurbinsa ba kusa da ether cellulose, yana rage nauyin kwayoyin halitta na polymer. Sabili da haka, idan ana so a adana maganin ruwa na cellulose ether na dogon lokaci, dole ne a ƙara wani abu mai mahimmanci a ciki. Wannan gaskiya ne har ma da ethers cellulose antimicrobial.

3. Manufar

3.1 Filin Mai: NaCMC galibi ana amfani da shi wajen amfani da albarkatun mai, kuma ana amfani da shi wajen yin laka don ƙara danko da rage asarar ruwa. Zai iya tsayayya da gurɓataccen gishiri mai narkewa iri-iri da inganta dawo da mai. Sodium carboxymethyl hydroxypropyl cellulose da sodium carboxymethyl hydroxyethyl cellulose ne mai kyau hakowa laka magani jamiái da kayan da shirya kammala ruwaye, tare da high pulping kudi, mai kyau gishiri da kuma alli juriya, Yana da kyau danko-ƙara ikon da zazzabi juriya (160 ° C). Ya dace da shirya ruwa mai tsabta na ruwa mai kyau, ruwan teku da cikakken ruwan gishiri. Ana iya ƙirƙira shi cikin ruwa mai ƙarewa na nau'ikan yawa (1.03-1.279/Cm3) ƙarƙashin nauyin calcium chloride, kuma yana da ɗanɗano. Kuma ƙananan asarar ruwa, ƙarfinsa yana ƙaruwa da raguwar iyawar ruwa sun fi hydroxyethyl cellulose kyau, yana da kyau ƙari don haɓaka samar da mai.
3.2 Gina yumbura: NaCMC za a iya amfani dashi azaman retarder, wakili mai riƙe ruwa, mai kauri da ɗaure, don samfuran yumbu da aka samar suna da kyaun gani kuma babu lahani da kumfa.
3.3 Takarda: Ana amfani da NaCMC don girman ciki da waje da cikawa da riƙe saman takarda, kuma yana iya maye gurbin casein, ta yadda tawada za ta iya shiga cikin sauƙi kuma gefuna a bayyane. A cikin yin fuskar bangon waya, ana iya amfani da shi azaman mai rarraba launi, tackifier, stabilizer da wakili mai ƙima.
3.4 Yadi: Ana amfani da NaCMC a matsayin maye gurbin hatsi da girma a cikin masana'antar yadi, kuma ba shi da sauƙi a lalacewa kuma ya zama m. Lokacin bugawa da rini, babu buƙatar desizing, kuma rini na iya samun colloid iri ɗaya a cikin ruwa, wanda ke haɓaka hydrophilicity da shigar da rini. A lokaci guda, saboda ƙananan canji a cikin danko, yana da sauƙi don daidaita bambancin launi. Ana amfani da CMHEC a matsayin mai kauri don bugu da rini, tare da ƙananan raguwa da yawan amfanin ƙasa, kuma ingancin bugu da rini ya fi girma fiye da samfuran ionic guda ɗaya da waɗanda ba na ionic cellulose ether ba.
3.5 Taba: Ana amfani da NaCMC don haɗawa da taba. Yana narkewa da sauri kuma yana da ƙarfin haɗin gwiwa mai ƙarfi, wanda ke da fa'ida don haɓaka ingancin sigari da rage farashi.
3.6 Cosmetics: NaCMC taka rawar watsawa, suspending da stabilizing da manna kayayyakin na m silty albarkatun kasa, da kuma taka rawar da thickening, dispersing da homogenizing a cikin ruwa ko emulsion kayan shafawa. Hakanan ana iya amfani dashi azaman emulsifier, thickener da stabilizer don maganin shafawa da shamfu.
3.7 Baturi: NaCMC yana da tsabta mai kyau, mai kyau acid da gishiri juriya, musamman ƙananan ƙarfe da ƙarfe mai nauyi, kuma colloid yana da kwanciyar hankali, ya dace da batura na alkaline da baturan zinc-manganese.
3.8 Fenti na tushen ruwa: HEC da MHEC za a iya amfani da su azaman stabilizers, thickeners da ruwa-retaining agents ga latex fenti. Bugu da ƙari, ana iya amfani da su azaman masu rarrabawa, masu taki da masu yin fim don fenti masu launin siminti.
3.9 Kayan gini: Ana iya amfani da shi azaman mai rarrabawa, wakili mai riƙe ruwa da kauri don filasta da turmi na ƙasan gypsum ƙasa da siminti ƙasa Layer, da kayan kwalliyar ƙasa.
3.10 Glaze: Ana iya amfani dashi azaman manne na glaze.
3.11 Detergent: Ana iya amfani dashi azaman wakili na anti-mannewa don kauri datti.
3.12 Emulsion watsawa: ana iya amfani dashi azaman stabilizer da thickener.
3.13 Man goge haƙori: Ana iya amfani da NaCMHPC azaman stabilizer don adhesives. Yana da kyawawan kaddarorin thixotropic, yana sanya man goge baki mai kyau a siffa, na dogon lokaci ba tare da nakasawa ba, kuma yana da uniform da ɗanɗano mai ɗanɗano. NaCMHPC yana da mafi girman juriya na gishiri da juriya na acid, kuma tasirin sa ya fi na CMC.

4. Aikace-aikace a cikin sutura da manna

Cellulose ether yana taka muhimmiyar rawa a cikin sutura da manna. Kawai ƙara jimlar adadin dabara O. 2% zuwa 0.5% na iya kauri, riƙe ruwa, hana pigments da filler daga daidaitawa, da ƙara mannewa da ƙarfin haɗin gwiwa.
4.1 Dankowa: Dankin cellulose ether ruwa mai ruwa yana canzawa tare da karfi, kuma fenti da manna mai kauri tare da ether cellulose suma suna da wannan siffa. Don sauƙin amfani da sutura, nau'in da adadin ether cellulose dole ne a zaba a hankali. Don sutura, lokacin amfani da ether cellulose, ana iya zaɓar samfuran ɗanko mai matsakaici.
4.2 Riƙewar ruwa: Cellulose ether na iya hana danshi da sauri shiga cikin ma'auni mai laushi, ta yadda zai iya samar da sutura iri ɗaya yayin aikin ginin gaba ɗaya ba tare da bushewa da sauri ba. Lokacin da abun ciki na emulsion ya yi girma, ana iya biyan buƙatun riƙewar ruwa ta amfani da ƙananan ether cellulose. Riƙewar ruwa na fenti da slurries ya dogara da ƙaddamarwar ether cellulose da zafin jiki mai rufi.
4.3 Stable pigments da fillers: Pigments da fillers sukan yi hazo. Don kiyaye kayan fenti da kwanciyar hankali, masu cika pigment dole ne su kasance cikin yanayin da aka dakatar. Yin amfani da ether cellulose zai iya sa fenti ya sami ɗan ɗanko, kuma babu hazo da zai faru a lokacin ajiya.
4.4 Maƙarƙashiya da ƙarfin haɗin gwiwa: Saboda kyakkyawar riƙewar ruwa da mannewa na ether cellulose, za'a iya tabbatar da mannewa mai kyau tsakanin sutura da substrate. MHEC da NaCMC suna da kyakkyawar mannewa da bushewa, don haka sun dace musamman ga ɓangaren litattafan almara, yayin da HEC bai dace da wannan dalili ba.
4.5 Ayyukan colloid mai kariya: Saboda hydrophilicity na ether cellulose, ana iya amfani dashi azaman colloid mai kariya don sutura.
4.6 Thickener: Cellulose ether ana amfani dashi sosai a cikin fenti na latex azaman mai kauri don daidaita ɗankowar gini. Medium da high danko hydroxyethyl cellulose da methyl hydroxyethyl cellulose aka yafi amfani a emulsion Paint. Wasu lokuta ana iya amfani da ether cellulose tare da masu kauri na roba (kamar polyacrylate, polyurethane, da sauransu) don inganta wasu kaddarorin fenti na latex da ba da kwanciyar hankali na latex.
Cellulose ethers duk suna da kyakkyawar riƙewar ruwa da kaddarorin kauri, amma wasu kaddarorin sun bambanta. Anionic cellulose ether, mai sauƙi don samar da gishiri marar narkewa tare da divalent da trivalent cations. Saboda haka, idan aka kwatanta da methyl hydroxyethyl cellulose da hydroxyethyl fiber, sodium carboxymethyl cellulose yana da matalauta goge juriya. Don haka sodium carboxymethyl cellulose za a iya amfani da shi a cikin arha fenti na latex.
Methyl hydroxyethyl cellulose da methyl hydroxypropyl cellulose da ƙananan karfi danko da mafi girma surfactant Properties fiye da hydroxyethyl cellulose, don haka rage hali na latex Paint to splatter. Kuma carboxymethyl cellulose ba shi da wani surfactant sakamako.
Hydroxyethyl cellulose yana da halaye na mai kyau ruwa, low goga juriya da sauki yi a cikin latex fenti. Idan aka kwatanta da methyl hydroxyethyl da methyl hydroxypropyl cellulose, yana da mafi dacewa tare da pigments, don haka Ana ba da shawarar ga siliki latex fenti, launi na latex fenti, manna launi, da dai sauransu.