1. Menene babban amfani da hydroxypropyl methylcellulose (HPMC)?
Ana amfani da HPMC sosai a fannin kayan gini, fenti, resin roba, yumbu, magani, abinci, yadi, noma, kayan kwalliya, taba da sauran masana'antu. Ana iya raba HPMC zuwa matakin gini, matakin abinci da kuma matakin magunguna bisa ga manufar. A halin yanzu, yawancin kayayyakin gida suna da matakin gini. A fannin gini, ana amfani da foda putty sosai, kusan kashi 90% ana amfani da shi don foda putty, sauran kuma ana amfani da shi don turmi da manne na siminti.
2. Akwai nau'ikan hydroxypropyl methylcellulose (HPMC) da dama, kuma menene bambance-bambancen amfani da su?
Ana iya raba HPMC zuwa nau'in nan take da nau'in narkewa mai zafi. Samfurin nan take yana warwatse da sauri a cikin ruwan sanyi kuma yana ɓacewa cikin ruwa. A wannan lokacin, ruwan ba shi da ɗanɗano saboda HPMC yana warwatse ne kawai a cikin ruwa ba tare da narkewa na gaske ba. Kimanin mintuna 2, ɗanɗano na ruwan yana ƙaruwa a hankali, yana samar da colloid mai haske. Samfuran narkewa mai zafi, idan aka haɗu da ruwan sanyi, za su iya warwatse da sauri a cikin ruwan zafi kuma su ɓace a cikin ruwan zafi. Lokacin da zafin jiki ya faɗi zuwa wani zafin jiki, ɗanɗano zai bayyana a hankali har sai ya samar da colloid mai haske. Ana iya amfani da nau'in narkewa mai zafi kawai a cikin foda da turmi. A cikin manne da fenti na ruwa, za a sami wani abu na rukuni kuma ba za a iya amfani da shi ba. Nau'in nan take yana da fa'idodi da yawa. Ana iya amfani da shi a cikin foda da turmi na putty, da kuma manne da fenti na ruwa, ba tare da wani dalili ba.
3. Waɗanne hanyoyi ne ake amfani da su wajen narkar da hydroxypropyl methylcellulose (HPMC)?
Hanyar narkar da ruwan zafi: Tunda HPMC ba ya narkarwa a cikin ruwan zafi, ana iya watsa HPMC daidai gwargwado a cikin ruwan zafi a matakin farko, sannan a narkar da shi da sauri idan ya sanyaya. An bayyana hanyoyi guda biyu na yau da kullun kamar haka:
1) A zuba ruwan zafi da ake buƙata a cikin akwati a dumama shi zuwa kimanin digiri 70 na Celsius. A hankali a zuba hydroxypropyl methylcellulose a hankali a hankali a juya shi, da farko HPMC ta yi iyo a saman ruwan, sannan a hankali ta samar da wani sinadari mai laushi, wanda aka sanyaya a lokacin da ake juyawa.
2), ƙara 1/3 ko 2/3 na adadin ruwan da ake buƙata a cikin akwati, sannan a dumama shi zuwa 70°C, a watsa HPMC bisa ga hanyar 1), sannan a shirya ruwan zafi; sannan a ƙara sauran ruwan sanyi a cikin ruwan zafi, an sanyaya cakuda bayan an juya.
Hanyar haɗa foda: a haɗa foda na HPMC da adadi mai yawa na sauran abubuwa masu ƙura, a haɗa sosai da mahaɗi, sannan a ƙara ruwa don narkewa, sannan a iya narkar da HPMC a wannan lokacin ba tare da haɗa shi ba, saboda akwai ƙaramin HPMC kawai a cikin kowace ƙaramin kusurwa Foda, zai narke nan da nan lokacin da ya taɓa ruwa. ——Masana'antun foda na Putty da turmi suna amfani da wannan hanyar. [Ana amfani da Hydroxypropyl methylcellulose (HPMC) azaman mai kauri da kuma wakilin riƙe ruwa a cikin turmi na putty. ]
4. Ta yaya za a tantance ingancin hydroxypropyl methylcellulose (HPMC) cikin sauƙi da fahimta?
(1) Fari: Duk da cewa farin ba zai iya tantance ko HPMC yana da sauƙin amfani ba, kuma idan aka ƙara sinadaran yin fari yayin aikin samarwa, zai shafi ingancinsa. Duk da haka, yawancin samfuran masu kyau suna da kyakkyawan fari.
(2) Inganci: Ingancin HPMC gabaɗaya yana da raga 80 da raga 100, kuma raga 120 ƙasa da haka. Yawancin HPMC da ake samarwa a Hebei raga 80 ne. Ingancin ingancin, gabaɗaya, mafi kyau.
(3) Watsa haske: saka hydroxypropyl methylcellulose (HPMC) a cikin ruwa don samar da colloid mai haske, sannan a duba watsa haske. Girman watsa haske, mafi kyau, yana nuna cewa akwai ƙarancin narkewa a cikinsa. . Fuskar masu amsawa a tsaye gabaɗaya tana da kyau, kuma na masu amsawa a kwance ya fi muni, amma ba yana nufin cewa ingancin masu amsawa a tsaye ya fi na masu amsawa a kwance kyau ba, kuma ingancin samfurin yana da alaƙa da dalilai da yawa.
(4) Nauyin nauyi na musamman: Girman nauyin nauyi na musamman, mafi nauyi. Takamammen yana da girma, gabaɗaya saboda yawan sinadarin hydroxypropyl a cikinsa yana da yawa, kuma yawan sinadarin hydroxypropyl yana da yawa, riƙe ruwa ya fi kyau.
5. Nawa ne adadin hydroxypropyl methylcellulose (HPMC) a cikin foda na putty?
Adadin HPMC da ake amfani da shi a aikace ya bambanta dangane da yanayin yanayi, zafin jiki, ingancin sinadarin calcium na gida, dabarar foda putty da kuma "ingancin da abokan ciniki ke buƙata". Gabaɗaya, tsakanin kilogiram 4 zuwa 5. Misali: yawancin foda putty a Beijing kilogiram 5 ne; yawancin foda putty a Guizhou kilogiram 5 ne a lokacin rani da kuma kilogiram 4.5 a lokacin hunturu; adadin putty a Yunnan ƙanana ne, gabaɗaya kilogiram 3 zuwa 4, da sauransu.
6. Menene dacewar danko na hydroxypropyl methylcellulose (HPMC)?
Fulawar putty gabaɗaya tana da yuan 100,000, kuma buƙatun turmi sun fi girma, kuma ana buƙatar yuan 150,000 don sauƙin amfani. Bugu da ƙari, mafi mahimmancin aikin HPMC shine riƙe ruwa, sannan kauri. A cikin foda putty, matuƙar riƙe ruwa yana da kyau kuma ɗanɗanon ya yi ƙasa (70,000-80,000), haka nan yana yiwuwa. Tabbas, mafi girman ɗanɗanon, mafi kyawun riƙe ruwa. Lokacin da ɗanɗanon ya wuce 100,000, ɗanɗanon zai shafi riƙe ruwa. Ba a ƙara yin hakan ba.
7. Menene manyan alamun fasaha na hydroxypropyl methylcellulose (HPMC)?
Yawancin masu amfani da sinadarin Hydroxypropyl da kuma danko, suna damuwa da waɗannan alamomi guda biyu. Waɗanda ke da sinadarin hydroxypropyl mai yawa galibi suna da ingantaccen riƙe ruwa. Wanda ke da ɗanko mai yawa yana da ingantaccen riƙe ruwa, idan aka kwatanta da (ba gaba ɗaya ba), kuma wanda ke da ɗanko mai yawa ya fi kyau a yi amfani da shi a cikin turmi na siminti.
8. Menene manyan kayan da ake amfani da su wajen samar da sinadarin hydroxypropyl methylcellulose (HPMC)?
Babban kayan da ake amfani da su wajen samar da hydroxypropyl methylcellulose (HPMC): auduga mai tsafta, methyl chloride, propylene oxide, da sauran kayan da ake amfani da su wajen samar da caustic soda, acid, toluene, isopropanol, da sauransu.
9. Menene babban aikin amfani da HPMC a cikin foda na putty, kuma shin yana faruwa ne ta hanyar sinadarai?
A cikin foda na putty, HPMC tana taka rawa guda uku na kauri, riƙe ruwa da ginawa. Kauri: Ana iya ƙara cellulose don dakatarwa da kuma kiyaye maganin iri ɗaya sama da ƙasa, da kuma tsayayya da yin kasa. Rike ruwa: sa foda na putty ya bushe a hankali, kuma yana taimaka wa tokar calcium ta amsa a ƙarƙashin aikin ruwa. Ginawa: Cellulose yana da tasirin shafawa, wanda zai iya sa foda na putty ya sami kyakkyawan tsari. HPMC ba ya shiga cikin duk wani halayen sinadarai, amma yana taka rawa kawai. Ƙara ruwa a cikin foda na putty da sanya shi a bango martanin sinadarai ne, saboda ana samar da sabbin abubuwa. Idan ka cire foda na putty a bango daga bango, ka niƙa shi zuwa foda, ka sake amfani da shi, ba zai yi aiki ba saboda an samar da sabbin abubuwa (calcium carbonate). Babban abubuwan da ke cikin foda na ash calcium sune: cakuda Ca(OH)2, CaO2 da ƙaramin adadin CaCO3, CaO+H2O=Ca(OH)2—Ca(OH)2+CO2=CaCO3↓+H2O Calcium na ash yana cikin ruwa da iska A ƙarƙashin aikin CO2, ana samar da calcium carbonate, yayin da HPMC ke riƙe ruwa kawai, yana taimakawa wajen inganta amsawar ash calcium, kuma baya shiga cikin kowane martani da kansa.
10. HPMC wani sinadari ne na cellulose wanda ba ionic ba, to menene ba ionic ba?
A taƙaice dai, abubuwan da ba ion ba ne ba su da ion a cikin ruwa. Ionization yana nufin tsarin da ake raba electrolyte zuwa ions masu caji waɗanda za su iya motsawa cikin 'yanci a cikin wani takamaiman sinadarin sinadarai (kamar ruwa, barasa). Misali, sodium chloride (NaCl), gishirin da muke ci kowace rana, yana narkewa a cikin ruwa kuma yana yin ionize don samar da ions masu motsi kyauta (Na+) waɗanda ke da caji mai kyau da ions masu chloride (Cl) waɗanda ke da caji mara kyau. Wato, lokacin da aka sanya HPMC a cikin ruwa, ba zai rabu zuwa ions masu caji ba, amma yana wanzuwa a cikin nau'in ƙwayoyin halitta.
11. Menene alaƙar zafin gel na hydroxypropyl methylcellulose da shi?
Zafin gel na HPMC yana da alaƙa da yawan methoxy ɗinsa, ƙarancin yawan methoxy ↓, mafi girman zafin gel ↑.
12. Akwai wata alaƙa tsakanin digon foda na putty da HPMC?
Asarar foda na foda yana da alaƙa da ingancin sinadarin ash, kuma ba shi da alaƙa da HPMC. Ƙarancin sinadarin calcium na sinadarin toka da kuma rashin daidaiton CaO da Ca(OH)2 a cikin sinadarin toka zai haifar da asarar foda. Idan yana da alaƙa da HPMC, to idan HPMC ba shi da isasshen riƙe ruwa, zai kuma haifar da asarar foda. Don wasu dalilai, da fatan za a duba tambaya ta 9.
13. Menene bambanci tsakanin nau'in ruwan sanyi da kuma nau'in hydroxypropyl methylcellulose mai narkewa mai zafi a cikin tsarin samarwa?
Ana yi wa nau'in ruwan sanyi na HPMC magani a saman da glyoxal, kuma yana warwatsewa da sauri a cikin ruwan sanyi, amma ba ya narkewa da gaske. Yana narkewa ne kawai lokacin da danko ya ƙaru. Ba a yi wa nau'in narke mai zafi magani da glyoxal ba. Idan adadin glyoxal ya yi yawa, watsawar zai yi sauri, amma danko zai ƙaru a hankali, kuma idan adadin ya ƙanƙanta, akasin haka zai zama gaskiya.
14. Menene ƙamshin hydroxypropyl methylcellulose (HPMC)?
HPMC da aka samar ta hanyar narkewar abinci yana amfani da toluene da isopropanol a matsayin masu narkewa. Idan wankewar ba ta da kyau sosai, za a sami ɗan ƙamshi.
15. Yadda ake zaɓar hydroxypropyl methylcellulose (HPMC) mai dacewa don dalilai daban-daban?
Amfani da foda na putty: buƙatun sun yi ƙasa, ɗanɗanon ya kai 100,000, ya isa, abu mafi mahimmanci shine a kiyaye ruwa da kyau. Aiwatar da turmi: buƙatun da suka fi girma, ɗanɗanon ya fi girma, 150,000 ya fi kyau. Aiwatar da manne: ana buƙatar samfuran nan take masu ɗanɗanon ya fi girma.
16. Menene sunan hydroxypropyl methylcellulose?
Hydroxypropyl methyl cellulose, Turanci: Hydroxypropyl Methyl Cellulose Taƙaitaccen Bayani: HPMC ko MHPC Lakabi: hypromellose; Cellulose hydroxypropyl methyl ether; Hypromellose, Cellulose, 2-hydroxypropylmethyl Cellulose ether. Cellulose hydroxypropyl methyl ether Hyprolose.
17. Amfani da HPMC a cikin foda na putty, menene dalilin kumfa a cikin foda na putty?
A cikin foda mai kauri, HPMC tana taka rawa guda uku na kauri, riƙe ruwa da ginawa. Kada ku shiga cikin duk wani martani. Dalilan kumfa: 1. Sanya ruwa da yawa. 2. Ƙasan Layer ɗin ba ya bushe, kawai kurkura wani Layer a saman, kuma yana da sauƙin kumfa.
18. Menene dabarar foda mai tsami ga bangon ciki da na waje?
Foda mai kauri a bango: Calcium mai nauyi 800KG, Calcium mai toka 150KG (sitaci ether, kore mai kyau, ƙasan Pengrun, citric acid, polyacrylamide, da sauransu za a iya ƙara su yadda ya kamata)
Foda mai kauri a bango: siminti 350KG mai nauyi calcium 500KG quartz yashi 150KG foda latex 8-12KG cellulose ether 3KG sitaci ether 0.5KG zare na itace 2KG
19. Menene bambanci tsakanin HPMC da MC?
MC shine methyl cellulose, wanda aka yi shi da cellulose ether ta hanyar magance auduga mai tsafta da alkali, amfani da methane chloride a matsayin wakilin etherification, da kuma yin jerin halayen. Gabaɗaya, matakin maye gurbin shine 1.6~2.0, kuma narkewar shi ma ya bambanta da matakan maye gurbin daban-daban. Yana cikin cellulose ether wanda ba ionic ba.
(1) Rikewar ruwa na methyl cellulose ya dogara da adadin ƙarinsa, ɗanko, ɗanko na barbashi da kuma yawan narkewar sa. Gabaɗaya, idan adadin ƙarin ya yi yawa, ɗanko yana da ƙarami, kuma ɗanko yana da girma, ƙimar riƙe ruwa yana da yawa. Daga cikinsu, adadin ƙarin yana da babban tasiri akan ƙimar riƙe ruwa, kuma matakin ɗanko ba ya daidai da matakin riƙe ruwa kai tsaye. Yawan narkewar ya dogara ne akan matakin gyaran saman barbashi na cellulose da ɗanko na barbashi. Daga cikin ƙwayoyin cellulose da ke sama, methyl cellulose da hydroxypropyl methyl cellulose suna da ƙarin yawan riƙe ruwa.
(2) Methylcellulose yana narkewa a cikin ruwan sanyi, kuma zai yi wuya a narke a cikin ruwan zafi. Maganin ruwansa yana da ƙarfi sosai a cikin kewayon pH = 3 ~ 12. Yana da kyakkyawan jituwa da sitaci, guar gum, da sauransu da yawa. Lokacin da zafin jiki ya kai zafin gelation, gelation yana faruwa.
(3) Sauye-sauye a yanayin zafi zai yi tasiri sosai ga yawan riƙe ruwa na methyl cellulose. Gabaɗaya, idan yawan zafin ya yi yawa, to, riƙe ruwa ya fi muni. Idan zafin turmi ya wuce 40°C, riƙe ruwa na methyl cellulose zai ragu sosai, wanda hakan zai shafi ginin turmi sosai.
(4) Methyl cellulose yana da tasiri mai mahimmanci akan ginawa da mannewa na turmi. "Mannewa" a nan yana nufin ƙarfin manne da aka ji tsakanin kayan aikin mai amfani da ma'aikacin da kuma abin da ke kan bango, wato, juriyar yanke turmi. Mannewa yana da girma, juriyar yanke turmi yana da girma, kuma ƙarfin da ma'aikata ke buƙata yayin amfani shi ma yana da girma, kuma aikin ginin turmi ba shi da kyau. Mannewar methyl cellulose yana da matsakaicin matsayi a cikin samfuran cellulose ether.
HPMC hydroxypropyl methylcellulose ne, wanda wani gauraye ne na cellulose wanda ba ionic ba wanda aka yi daga auduga mai tsafta bayan an yi alkali, ana amfani da propylene oxide da methyl chloride a matsayin sinadaran etherification, kuma ta hanyar jerin halayen. Matsayin maye gurbin gabaɗaya shine 1.2~2.0. Halayensa sun bambanta saboda bambancin rabo na abun ciki na methoxyl da abun ciki na hydroxypropyl.
(1) Hydroxypropyl methylcellulose yana narkewa cikin sauƙi a cikin ruwan sanyi, kuma zai fuskanci matsaloli wajen narkewa a cikin ruwan zafi. Amma zafin gelation ɗinsa a cikin ruwan zafi ya fi na methyl cellulose girma sosai. Hakanan yana inganta narkewa a cikin ruwan sanyi sosai idan aka kwatanta da methyl cellulose.
(2) Dankowar hydroxypropyl methylcellulose yana da alaƙa da nauyin kwayoyin halittarsa, kuma girman nauyin kwayoyin halittar, haka nan girman dankowar. Zafin jiki kuma yana shafar dankowar sa, yayin da zafin jiki ke ƙaruwa, dankowar yana raguwa. Duk da haka, babban dankowar sa yana da ƙarancin tasirin zafin jiki fiye da methyl cellulose. Maganin sa yana da karko idan aka adana shi a zafin jiki na ɗaki.
(3) Hydroxypropyl methylcellulose yana da daidaito ga acid da alkali, kuma ruwan da ke cikinsa yana da daidaito sosai a cikin kewayon pH = 2 ~ 12. Soda mai kauri da ruwan lemun tsami ba su da tasiri sosai kan aikinsu, amma alkali na iya hanzarta narkewarsa da ƙara dankonsa. Hydroxypropyl methylcellulose yana da daidaito ga gishirin da aka saba da shi, amma idan yawan ruwan gishiri ya yi yawa, danko na ruwan hydroxypropyl methylcellulose yana ƙaruwa.
(4) Rikewar ruwa na hydroxypropyl methylcellulose ya dogara da adadin ƙarinsa, dankonsa, da sauransu, kuma yawan riƙewar ruwa a ƙarƙashin adadin ƙarin ya fi na methyl cellulose girma.
(5) Ana iya haɗa Hydroxypropyl methylcellulose da mahaɗan polymer masu narkewa cikin ruwa don samar da mafita mai kama da juna kuma mafi girma. Kamar polyvinyl alcohol, sitaci ether, kayan lambu, da sauransu.
(6) Mannewar hydroxypropyl methylcellulose ga ginin turmi ya fi na methylcellulose girma.
(7) Hydroxypropyl methylcellulose yana da juriya ga enzyme fiye da methylcellulose, kuma maganin sa ba shi da yuwuwar lalacewa ta hanyar enzymes fiye da methylcellulose.
20. Me ya kamata a kula da shi wajen aiwatar da alaƙar da ke tsakanin ɗanko da zafin jiki na HPMC?
Danko na HPMC yana da daidaiton da ya dace da zafin jiki, wato, danko yana ƙaruwa yayin da zafin jiki ke raguwa. Danko na samfurin da muke yawan magana a kai yana nufin sakamakon gwajin maganin ruwansa na kashi 2% a zafin digiri 20 na Celsius.
A aikace-aikace na zahiri, ya kamata a lura cewa a yankunan da ke da babban bambancin zafin jiki tsakanin lokacin rani da hunturu, ana ba da shawarar a yi amfani da ƙarancin ɗanko a lokacin hunturu, wanda ya fi dacewa da gini. In ba haka ba, idan zafin ya yi ƙasa, ɗanko na cellulose zai ƙaru, kuma jin hannun zai yi nauyi lokacin gogewa.
Matsakaicin danko: 75000-100000 galibi ana amfani da shi don putty
Dalili: Mai kyau riƙe ruwa
Babban danko: 150000-200000 Ana amfani da shi sosai don rufin zafi na barbashi na polystyrene foda na roba da turmi mai rufi na microbead mai haske.
Dalili: Danko yana da yawa, turmi ba shi da sauƙin faɗuwa, ya yi ja, kuma an inganta ginin.
Amma gabaɗaya, yawan danko, haka nan kuma yawan riƙe ruwa zai fi kyau. Saboda haka, idan aka yi la'akari da farashin, masana'antun turmi da yawa na busassun foda suna maye gurbin cellulose mai matsakaicin danko da ƙarancin danko (20000-40000) da cellulose mai matsakaicin danko (20000-40000) don rage yawan ƙarin.
Lokacin Saƙo: Nuwamba-18-2022