Hordhaca maaddada 

PLA (polylactic acid) biodegradable material refers to a class of materials that are degraded by the action of microorganisms such as bacteria, molds (fungi) and algae that exist in nature. Chinese alias: polylactide (also known as polylactic acid) English name: polylactide, polylactic acid, abbreviated PLA English alias: polytrimethylene carbonate; 1,3-Dioxan-2-one homopolymerMolecular formula: (C3H4O2)n 

PLA polylactic acid waxay isticmaashaa lactic acid sida alaabta ceeriin ee ugu weyn, badiyaa laga helo kasaafada, galleyda, sonkorta iyo dhirta kale si ay u hesho istaarijka iyo sonkorta sonkorta lactic acid oo ay heshay halsano bakteeriyada, ugu dambeyntii waxay sameysaa polymer laga helay polymerization of polylactic acid (PLA). ). Isha alaabta ceeriin ayaa ku filan oo la cusbooneysiin karaa. 

The entire production process of polylactic acid and polylactic acid fiber does not involve any harmful substances. It is a kind of polymer material with excellent performance, which can be completely decomposed by environmental microorganisms after being discarded, and finally be inorganicized and become an integral part of the carbon cycle in nature. 

Astaamaha agabka

1. Polylactic acid (PLA) waa nooc cusub oo walxo biodegradable ah oo leh biodegradability wanaagsan. Isticmaalka ka dib, waxaa gebi ahaanba hoos u dhigi kara noolaha dabiiciga ah, oo ugu dambeyntii soo saara carbon dioxide iyo biyo, taas oo aan wasakheynin deegaanka, taas oo faa'iido badan u leh ilaalinta deegaanka. , waa shay la aqoonsan yahay oo deegaan ahaan u wanaagsan.

2. Polylactic acid (PLA) filimku wuxuu leeyahay hawo wanaagsan oo hawada ah, oksijiinta oksijiinta iyo kaarboon dioxide. Waxa kale oo ay leedahay sifooyinka gooni-gooynta urta. Waa balaastiigga kaliya ee noole rogrogmi karta oo leh sifooyin bakteeriyada iyo fungal aad u wanaagsan.

3. Marka la gubo polylactic acid (PLA), gubashadeeda qiimaha calorific waxay la mid tahay tan warqadda la gubo, taas oo ah kala badh tan lagu gubo balaastigga dhaqameed (sida polyetylen), iyo gubashada PLA weligeed ma sii deyn doonto gaasaska sunta ah sida nitrides iyo sulfides. . . Jidhka bini'aadamka waxa kale oo ku jira lactic acid oo ah qaab monomeric ah, taas oo muujinaysa badbaadada alaabtan la burburin karo.

Guryaha dabiiciga ah iyo faa'iidooyinka

1. Qiimaha pH wuxuu ku dhow yahay 6, kaas oo ah mid daciif ah.

2. Xakamaynta caarada, heerka xakamaynta waxqabadka ka hortagga caarada ee xogta tijaabada waa 71.39%, gunaanadkuna waa inuu leeyahay saameyn lid ku ah caarada.

3. Saamaynta bakteeriyada waa caddahay, iyo heerka luminta Staphylococcus aureus, Candida albicans iyo Escherichia coli waa in ka badan 98%. (Tijaabada awooda SGS) 

4. Ma jiraan bakteeriyada, daawooyinka ka hortagga caarada ama walxaha kale ee kiimikaad ee lagu daro habka wax soo saarka, taas oo si buuxda u shaqeyneysa sifooyinkeeda dabiiciga ah.

5. Dabiiciga ah is-deminta: aan guban karin, iyo tusaha xadka ogsijiinta ayaa ka sarreeya kan polyesterka iyo naylon.

6. Waxqabadka kuleylka kuleylka ayaa 1.8 jeer ka weyn kan suufka tayada sare leh. (xogta tijaabada)

7. Soo kabashada wanaagsan, bulkness xoog leh, dareen siman, qallajin degdeg ah iyo iska caabin UV. 

Isticmaalka qalabka

Polylactic acid waxay leedahay xasilooni kulayl wanaagsan;heerkulka processing waa 170 ~ 230 ℃, waxayna leedahay iska caabin dareere wanaagsan. Waxaa loo habayn karaa siyaabo kala duwan, sida extrusion, spinning, biaxial iskala, irbaynta dharbaaxada. Waxa intaa dheer in ay yihiin biodegradable, alaabta ka samaysan polylactic acid waxay leeyihiin bioocompatibility wanaagsan, gloss, hufnaan, dareenka gacanta iyo caabbinta kulaylka, iyo sidoo kale caabbinta bakteeriyada qaarkood, olol dib u dhac iyo caabbinta UV, sidaas darteed aad bay faa'iido u leeyihiin. ballaaran. 

Walxaha noolaha ee loo isticmaalo dawada, xubnaha bini'aadamka iyo qaybaha kale waa la bedeli karaa si loo naqshadeeyo loona sameeyo walxo noole-dhalasho ah oo aan lahayn balaastiig, biraha culus iyo kiimikooyinka sunta ah, bisphenol A, oo ka madax banaan kheyraadka batroolka, iyo badbaadada xiriirka cuntada; 

The molding process can be selected from injection molding, extrusion, blow molding, and blister molding, which is suitable for household daily necessities, tableware products in contact with food or oral cavity, etc.;It can be widely used as packaging materials, fibers and non-woven fabrics, etc., and is mainly used in clothing (underwear, outerwear), industry (construction, agriculture, forestry, papermaking) and medical and health fields. 

Joogteynta Codsiga 

1. Yaree isticmaalka walxaha petrochemical oo yareeya qiiqa kaarboonka 

2. Isticmaal alaabta ceeriin ee dabiiciga ah ee dib loo cusboonaysiin karo (sida: istaarijka dhirta, sonkorta sonkorta, fiber-caws, iwm.)

3. Qaado habka wax soo saarka cagaaran iyo badbaadada

4. La jaanqaadi kara nidaamka maaraynta qashinka adag ee jira

5. Waa la gubi karaa - gabi ahaanba gubasho nadiif ah

6. Waa la qashin-buufin karaa- ma jiraan wax caleen ah ama sun ah oo waxyeello leh

7. Compostable 

8. Dib ayaa loo warshadayn karaa oo loo farsamayn karaa monomers ama alaab kale

9. Abuur deegaan wanaagsan oo ay ku noolaadaan jiilalka soo socda, korna u qaadaan tayada nolosha 

Hoos u dhaca PLA ayaa tilmaamaya 

Burburinta compost:PLA can achieve full biodegradation within 180 days under compost degradation conditions, and the final degradation products are carbon dioxide and water. The composting conditions are as follows:The temperature is 58±2℃Humidity is 98% 

Waxaa jira microbial gaar ah 

xaalufka qashin-qubka:landfill conditions are different from composting conditions, so the degradation rate of PLA is slower, generally taking 2-5 years, but the degradation products do not pollute groundwater, do not damage plant growth, and do not waste arable land. degradation.Incineration : PLA has a small combustion calorific value, and the complete combustion products are carbon dioxide and water, which does not pollute the air. 

Heerka warshadaha iyo rajada

The price of PLA before large-scale industrialization is $1000/kg. Later, large-scale production was achieved through the industrialization research of Professor Ramani Narayan's research group at Michigan State University. The technology is now industrialized by Natureworks. The largest manufacturer of PLA is NatureWorks in the United States, followed by China's Hisun Bio, whose current output is 100,000 tons and 5,000 tons respectively. PLA has many applications and can be used in extrusion, injection molding, film drawing, spinning and other fields. PLA fiber uses natural and renewable plant resources as raw materials, which reduces the dependence on traditional petroleum resources and meets the requirements of sustainable development of the international community. It has both the advantages of synthetic fibers and natural fibers, and at the same time has the characteristics of complete natural circulation and biodegradation. Compared with conventional fiber materials, corn fiber has many unique properties, so it has been widely valued by the international textile industry.