Carboxymethyl cellulose:
Ionicether cellulosewaxaa laga sameeyaa fiilooyinka dabiiciga ah (suuf, iwm.) ka dib daawaynta alkali, iyadoo la isticmaalayo sodium monochloroacetate sida wakiilka etherification, iyo maraayo taxane ah oo daaweyn falcelin. Heerka beddelka guud ahaan waa 0.4 ~ 1.4, waxqabadkeedana waxaa si weyn u saameeya heerka beddelka.
(1) Carboxymethyl cellulose waa hygroscopic badan, waxayna ku jiri doontaa biyo badan marka lagu kaydiyo xaaladaha guud.
(2) Carboxymethyl cellulose xal aqueous ma soo saaro jel, iyo viscosity hoos u korodhka heerkulka. Marka heerkulku ka sarreeyo 50 ° C, mawduucu waa mid aan la beddeli karin.
(3) Degganaanshaheeda waxaa si weyn u saameeya PH. Guud ahaan, waxaa loo isticmaali karaa hoobiyeyaasha gypsum-ku-saleysan, laakiin aan loo isticmaalin hoobiye-cement-ku-saleysan. Marka alkaline-ku sarreeyo, waxay lumin doontaa viscosity.
(4) Haysashada biyuhu aad bay uga hooseeyaan tan methyl cellulose. Waxay saameyn dib-u-dhac ah ku leedahay maadada gypsum-ku-saleysan waxayna yareysaa awooddeeda. Si kastaba ha noqotee, qiimaha karboxymethyl cellulose aad ayuu uga hooseeyaa kan methyl cellulose.
Cellulose alkyl ether:
Kuwa ka wakiil ah waa methyl cellulose iyo ethyl cellulose. In wax soo saarka warshadaha, chloride methyl ama ethyl chloride guud ahaan loo isticmaalo sida wakiilka etherification, iyo falcelinta waa sida soo socota:
Qaaciddada, R waxay u taagan tahay CH3 ama C2H5. Feejignaanta Alkali kaliya ma saamayso heerka etherification, laakiin sidoo kale waxay saamaysaa isticmaalka alkyl halides. Hoos u dhigista fiirsashada alkali, way sii xoogaysanaysaa hydrolysis ee halide alkyl. Si loo yareeyo isticmaalka wakiilka etherifying, xoojinta alkali waa in la kordhiyaa. Si kastaba ha noqotee, marka fiirsashada alkali ay aad u sarreyso, saameynta bararka ee cellulose waa la dhimaa, taas oo aan ku habooneyn falcelinta etherification, iyo heerka etherification waa la dhimay. Ujeedadaas awgeed, lye ama lye adag ayaa lagu dari karaa inta lagu jiro falcelinta. Reactor-ku waa inuu lahaadaa qalab walaaq iyo jeexid wanaagsan si alkaligu si siman loo qaybiyo.
Methyl cellulose waxaa si weyn loo isticmaalaa sida dhumucdiisuna, xabagta iyo kolloid ilaalinta iwm Waxa kale oo loo isticmaali karaa sida kala firdhiso for polymerization emulsion ah, kala firdhiso a bonding for abuurka, slurry dunta ah, wax lagu daro cuntada iyo isku qurxiyo, a koollada ah daawo, alaabta daahan daroogada ah, iyo rinjiga cinjirka ah, daabacaadda khad, iyo kordhinta goobta xoogga isku qasan, dhoobada, iyo in la kordhiyo waqti isku dhafan ee wax soo saarka. iwm.
Alaabooyinka Ethyl cellulose waxay leeyihiin awood farsamo oo sare, dabacsanaan, caabbinta kulaylka iyo caabbinta qabow. Ethyl cellulose-ka hooseeya ee lagu beddelo waxay ku milmi kartaa biyaha waxayna milmaan xalalka alkaline, iyo alaabada beddelka sare leh waxay ku milmaan inta badan dareerayaasha dabiiciga ah. Waxay leedahay iswaafajin wanaagsan oo leh resins kala duwan iyo balaastikada. Waxa loo isticmaali karaa in lagu sameeyo caagadaha, filimada, faashashka, xabagta, cinjirka iyo waxyaalaha dahaadhka ah ee dawooyinka, iwm.
Soo bandhigida kooxaha hydroxyalkyl galay cellulose alkyl ethers hagaajin karaa ay milmay, la yareeyo dareenka ay u milix baxay, kordhiyaa heerkulka gelation iyo hagaajin guryaha dhalaalaysa kulul, iwm. Degree isbedel ah ee guryaha kor ku kala duwan yihiin dabeecadda beddelka iyo saamiga alkyl in kooxaha hydroxyalkyl.
Cellulose hydroxyalkyl ether:
Kuwa matalaya waa hydroxyethyl cellulose iyo hydroxypropyl cellulose. Waxyaalaha Etherifying waa epoxides sida ethylene oxide iyo propylene oxide. Isticmaal aashito ama saldhig si kicin ah. Wax soo saarka warshaduhu waa in ay ka falceliyaan cellulose alkali leh wakiilka etherification: hydroxyethyl cellulose oo leh qiime sare oo bedel ah ayaa ku milma biyaha qabow iyo biyaha kulul labadaba. Hydroxypropyl cellulose oo leh qiime sare oo beddelaad ah ayaa kaliya lagu milmaa biyo qabow laakiin kuma jiraan biyo kulul. Hydroxyethyl cellulose waxa loo isticmaali karaa dhumuc ahaan dahaarka cinjirka ah, daabacaadda dunta iyo koollada midabaynta, alaabta cabbirka warqadda, xabagta iyo koloyada ilaalinta. Isticmaalka hydroxypropyl cellulose wuxuu la mid yahay kan hydroxyethyl cellulose. Hydroxypropyl cellulose oo leh qiimihii beddelka hooseeya ayaa loo isticmaali karaa sidii qalab dawo ah, kaas oo yeelan kara sifooyin isku xidhan iyo kuwo burbura labadaba.
Carboxymethylcellulose, oo loo soo gaabiyo sidaCMC, guud ahaan waxay u jirtaa qaabka cusbada soodhiyamka. Wakiilka etherifying waa monochloroacetic acid, falcelintuna waa sida soo socota:
Carboxymethyl cellulose waa eter-ka cellulose-ka ugu badan ee loo isticmaalo biyaha. Waagii hore, waxa inta badan loo isticmaali jiray sida dhoobada qodista, laakiin hadda waa la kordhiyey in loo isticmaalo sidii wax lagu daro oo ah saabuunta, dareeraha dharka, rinjiga cinjirka, dahaarka kartoonada iyo waraaqaha, iwm.
Polyanionic cellulose (PAC) waa ionicether cellulosewaana badeecad heersare ah oo beddeleysa karboxymethyl cellulose (CMC). Waa caddaan, cad-cad ama budo huruud ah ama granule ah, aan sun ahayn, aan dhadhamin, si fudud biyaha loogu milmi karo, samaynta xal hufan oo leh viscosity gaar ah, waxay leedahay xasillooni caabbinta kulaylka iyo caabbinta milixda, iyo sifooyinka bakteeriyada xooggan. Ma jiro caariyaysi iyo xumaan. Waxay leedahay sifooyinka nadiifnimada sare, beddelka heerka sare, iyo qaybinta isku midka ah ee beddelka. Waxaa loo isticmaali karaa sida binder, dhumuc weyn, rheology modifier, yareeyaha luminta dareeraha, stabilizer ganaax, iwm Polyanionic cellulose (PAC) waxaa si ballaaran loo isticmaalaa in dhammaan warshadaha halkaas oo CMC lagu dabaqi karo, taas oo si weyn u dhimi kartaa qiyaasta, fududeeyo isticmaalka, bixiyaan xasillooni ka wanaagsan iyo buuxiyo shuruudaha nidaamka sare.
Cyanoethyl cellulose waa sheyga falcelinta cellulose iyo acrylonitrile ee hoos yimaada catalysis ee alkali:
Cyanoethyl cellulose waxay leedahay dielectric joogto ah oo hooseeya iyo iskudhaf yar oo khasaare ah waxaana loo isticmaali karaa matrix resin ah fosfoor iyo nalalka elektroluminescent. Cyanoethyl cellulose-ka hooseeya ee lagu beddelay ayaa loo isticmaali karaa sidii warqad dahaadh ah oo loogu talagalay transformers.
Aalkolada dufanka badan ee ethers, alkenyl ethers, iyo ethers alkohol udgoon ee cellulose ayaa la diyaariyey, laakiin aan loo isticmaalin si dhab ah.
Hababka diyaarinta ee ether cellulose waxaa loo qaybin karaa habka dhexdhexaadka ah ee biyaha, habka dareeraha, habka cajiinka, habka slurry, habka gaaska adag, habka dareeraha dareeraha ah iyo isku dhafka hababka kor ku xusan.
Waqtiga boostada: Abriil-28-2024