Habka wax soo saarka ee sodium carboxymethylcellulose

Habka wax soo saarka ee sodium carboxymethylcellulose (CMC) waxay ku lug leedahay dhowr tillaabo, oo ay ku jiraan diyaarinta cellulose, etherification, nadiifinta, iyo qalajinta. Halkan waxaa ah dulmar guud oo ku saabsan habka wax soo saarka ee caadiga ah:

1. Diyaarinta Cellulose: Nidaamku wuxuu ka bilaabmaa diyaarinta cellulose, kaas oo caadi ahaan laga keeno saxarka alwaax ama suufka. Cellulose ayaa marka hore la nadiifiyaa oo la sifeeyaa si looga saaro wasakhda sida lignin, hemicellulose, iyo wasakh kale. cellulose-kan la safeeyey waxa uu u adeegaa sidii alaabta bilawga ah ee wax soo saarka CMC.
2. Alkalization: cellulose-ka la sifeeyay ayaa markaa lagu daaweeyaa xal alkaline ah, badiyaa sodium hydroxide (NaOH), si loo kordhiyo fal-celinta oo loo fududeeyo falcelinta etherification ee xigta. Alkalization sidoo kale waxay caawisaa inay bararaan oo ay furto fiilooyinka cellulose, taasoo ka dhigaysa inay aad u sahlanaato in wax laga beddelo.
3. Dareen-celinta Etherification: cellulose-ka alkalized waxaa lagu falceliyaa monochloroacetic acid (MCA) ama milixdeeda sodium, sodium monochloroacetate (SMCA), iyada oo ay jirto wax kicinaya xaaladaha la xakameeyey. Falcelinta etherification Tani waxay ku lug leedahay beddelka kooxaha hydroxyl ee silsiladaha cellulose ee kooxaha karboxymethyl (-CH2COONa). Heerarka beddelka (DS), oo ka dhigan celceliska tirada kooxaha karboksymethyl ee unugga gulukooska ee silsiladda cellulose, waxaa lagu xakameyn karaa iyadoo la hagaajinayo cabbirrada falcelinta sida heerkulka, waqtiga falcelinta, iyo uruurinta falcelinta.
4. Dhexdhexaadinta: Ka dib falcelinta etherification, badeecada ka soo baxday waa dhexdhexaad si loogu beddelo koox kasta oo acidic ah oo soo hadhay qaabkooda cusbada sodium (carboxymethylcellulose sodium). Tan waxaa caadi ahaan lagu gaaraa in lagu daro xalalka alkaline, sida sodium hydroxide (NaOH), isku darka falcelinta. Dhexdhexaadintu waxay sidoo kale ka caawisaa hagaajinta pH ee xalka iyo xasilinta badeecada CMC.
5. Nadiifinta: Soodhiyamka karboxymethylcellulose ee cayriin ayaa markaa la nadiifiyaa si looga saaro wasakhda, reagen-yaasha aan la falgelin, iyo alaabada ka soo baxda isku darka falcelinta. Hababka sifaynta waxa ka mid noqon kara maydhista, sifaynta, centrifugation, iyo qalajinta. CMC-da la safeeyey ayaa sida caadiga ah lagu dhaqaa biyo si meesha looga saaro alkali iyo cusbada haraaga ah, oo ay ku xigto sifaynta ama centrifugation si loo kala saaro badeecada CMC adag iyo heerka dareeraha.
6. Qalajinta: Soodhiyamka karboxymethylcellulose ee la safeeyey ayaa ugu dambeyntii la qalajiyey si looga saaro qoyaanka xad-dhaafka ah oo loo helo nuxurka qoyaanka la rabo ee kaydinta iyo habaynta dheeraadka ah. Hababka qallajinta waxaa ka mid noqon kara qalajinta hawada, qalajinta buufinta, ama qalajinta durbaanka, taas oo ku xidhan sifooyinka badeecada ee la doonayo iyo qiyaasta wax soo saarka.

Soodhiyamka karboxymethylcellulose ee ka soo baxay waa budo cad ama budo cad ama granular leh milmayn biyo oo aad u fiican iyo sifooyinka rheological. Waxaa si weyn loo isticmaalaa sida wakiilka dhumuc, xasiliye, binder, iyo rheology wax ka beddelka warshadaha kala duwan, oo ay ku jiraan cuntada, daawooyinka, qurxinta, dunta, iyo codsiyada warshadaha.